Reloading Glossary. The.220 Swift (5.56×56mmSR) is a semi-rimmed rifle cartridge developed by Winchester and introduced in 1935 for small game and vermin hunting. As stated in the .220 Swift text, hunters should steer well clear of 40-50 grain bullets when targeting lighter medium game. These new bullets are a re-configured A-Frame design. P. O. Ackley, in his wildest dreams, would not have tried the 220 Swift on elephant. Like all high velocity small caliber cartridges it has erratic performance on larger species unless bullets that are constructed for this purpose is used. At 50 yards the InterBond expanded immediately and violently, leaving particles of jacket material, lead and even the red polymer tip visible in the massive temporary cavity just inside the gel block. Ballistic gelatin is good as far as it goes, but there's nothing like seeing what a bullet actually does once it strikes bone, flesh, and organs. It was the first factory-loaded rifle cartridge with a muzzle velocity of over 1,200 m/s (4,000 ft/s). The .220 Swift uses .224” bullets in spite of its name, and it is one of the most accurate high-power .22 cartridges ever made. Ballistics help with a 220 swift. In 1935, Winchester released the.220 Swift, a truly high velocity cartridge designed for varmints and furbearers. Small Arms Wound Ballistics. If it's in English, thank a Vet! Factory bullets are all made to give rapid expansion in light animals - which is exactly what the .220 Swift is designed for. I have a 22 Hornet, 222 Rem, 220 Swift and 6MM Rem and all are shooters. Shop Nosler Products.22 Caliber Reloading Components. 22 Caliber Bullets. In 2012, Swift will introduce its new "Lever Action Series." You can push a 80grn amax easily at 3250fps with H4350, RE17, or Ramshot hunter at about a 40-42grn charge depend on throat length and seating depth. Norma is a registered trademark of RUAG Ammotec, a RUAG Group Company | Copyright © 2020 RUAG Ammotec GmbH, Blue Sheep Hunt in the Himalayan Mountains, Things to think about before your first moose hunt, Choosing the right bullet for wild boar hunting, African Swine Fever - A hunter's new bane, Ammo Selection Guide for White-Tailed Deer, Recipe: Roasted venison silverside by Jimmy Stening, Cartridge of the month: 470 Nitro Express, Norma BONDSTRIKE™ 6.5 field test at 1000 meters, EVOSTRIKE VS TIPSTRIKE in ballistic gelatin, Cartridge of the month: 300 Winchester Magnum, Video: Free range hunting in South Africa - Part 1, Video: Free range hunting in South Africa - Part 2, Video: Free range hunting in South Africa - Part 3, Video: Free range hunting in South Africa - Part 4, Five things to keep in mind before the buck premiere, Video: Three ways to shoot from a high stand, Tradition meets technology - Thermal and night vision. 406-777-2106. Rifles with barrels of both standard and heavy weights were offered, and to make sure the .220 Swift ran at top speed, all barrels were 26 inches long. Right click on the image of the load data and use save as. Muzzleloader. This new design allows the bullet to open up at very low velocities (1200 fps), which is critical in these slow moving cartridges. Firearms ; Rifle Scopes ; Scope Mounts ; Optics ; Night Vision ; Thermal ; Ammunition ; Projectiles ; Reloading ; Gun Cleaning ; … Load Data Downloads. Nosler Partition bullets are available in the weights 150 grains 165 grains, 180 grains, 200 grains and a 220 grain semi point. Kimber's new Model 84 Varmint and Weatherby's new Super VarmintMaster are fitting vehicles for taking a close look at these classic varmint cartridges.. In addition to being two of the world's fastest .22-caliber centerfire cartridges, the .22-250 and .220 Swift rank among the oldest. remington recommends our 405gr. Connect With Other Hunters. † for use in all rifles chamered in 45-70 govt. The Swift range of bullets include the 150, 165 and 180 grain Scirocco bullets along with the 165, 180 and 200 grain A-Frame bullets. Ballistic gelatin will be ruined if improperly (e.g., with hot water) or inconsistently prepared, if it is not aged and tested at a precise temperature, etc. Remington 700 VSF in .220 Swift #LongLIvethe220Swift - YouTube Based on the 6mm Lee Navy cartridge, the Swift is a semi-rimmed affair with plenty of case capacity for the 48-grain bullets that Winchester loaded for it. The 220 Swift, like the .22-250, is prone to case stretching due to its shallow shoulder angle and long, tapering shape. 220 Swift Cartridge Information. It exhibits larger expansion than the Nosler AccuBond and Swift Scirocco II and penetrates slightly less than either. Kimber's new Model 84 Varmint and Weatherby's new Super VarmintMaster are fitting vehicles for taking a close look at these classic varmint cartridges.. HSM Ammunition. Its popularity has been waning for a number of years, largely giving way to .22-250 Remington which is made by all major rifle manufacturers whereas few make .220 Swift rifles any longer. remington recommends our 405gr. Call me crazy but I just like the old cartridges. But shooting the old ones can really bring a smile to your face. .220 Swift.224 Weatherby.22-250... more in Knowledgebase. Joined: Dec 28, 2002 Messages: 3,550 Location: High up in the Rockies. Buy Xtreme Cavitator Ammo Buy Xtreme Cavitator Bullets. 22-250 Remington Ackley Improved Load Data, 223 Win Super Short Magnum (WSSM) Load Data, 243 Win Super Short Magnum (WSSM) Load Data, 25 Winchester Super Short Magnum Load Data, 270 Winchester Short Magnum (WSM) Load Data, 7mm Rem Short Action Ultra Magnum Load Data, 7mm Shooting Times Westerner (STW) Load Data, 30-06 Springfield Ackley Improved Load Data, 300 Rem Short Action Ultra Magnum Load Data, 300 Holland & Holland (H&H) Magnum Load Data, 300 Winchester Short Magnum (WSM) Load Data, 325 Winchester Short Magnum (WSM) Load Data, 358 Shooting Times Alaskan (STA) Load Data, 375 Holland & Holland (H&H) Magnum Load Data, 45-70 Gov’t (Strong Actions Only) Load Data, 45 Colt (Single Action Army & Replicas) Load Data, 45 Colt (Ruger & T/C Contender & Encore) Load Data. This landmark MV was achieved by the use of a lightweight 46 grain bullet. 220 Swift This is the fastest production cartridge ever made, dating back to 1935 when Winchester introduced it in their model 54 bolt action rifle. V 220 Swift 55 gr. When the Winchester Model 70bolt action was first issued in 1936, the 220 Swift was one of the standa… Launching 40-grain Nosler B-Tips, the .220 Swift comes factory loaded at 4,250fps, although I know of handloaders taking it over 4,500fps. Open up the load data page you wish to download. In addition to being two of the world's fastest .22-caliber centerfire cartridges, the .22-250 and .220 Swift rank among the oldest. Spin rates: The longer the projectile, the faster it must be spun in order to stabilize. 1:16. I also have a 250,223 and 204 so I like the new ones too. Load Data &Technical Information by Caliber. In fact, most of the 220 grainers don't even … Penetration in a homologous mass (like ballistic gel or elephant) is dependant on momentum. _____ Bob from Pa If you can read and write, thank a teacher. Something else the .220 Swift had going for it was its introduction in the Winchester Model 54, which was by far the most accurate factory rifle available at the time. Based on the 6mm Lee Navy case necked down to.224 the 220 Swift was released by Winchester in 1935 for the Model 54 bolt action rifle. * test barrel length in inches. V-MAX ® 8324 3680 3253 2868 2514 2186 1884 1654 1293 1004 772 583 433 -1 5 0 9-51 -158 -33 SV 243 Win 58 gr. The Door. individual firearm may vary from test barrel results. ... ABOUT TERMINAL BALLISTICS RESEARCH The worlds foremost online resource for information on hunting cartridges, projectiles and their use on medium to large game. This stretching can result in neck thickening and premature case-head separation. Technology. 220 Swift This is the fastest production cartridge ever made, dating back to 1935 when Winchester introduced it in their model 54 bolt action rifle. It was necked-down to .22 caliber and loaded with a 48 grain bullet with a muzzle velocity of no less than 4110 fps. If your looking for opions, I would get a 22-250 fl die and a 3 die 22-250 ackley die set, reform your 220 swift cases to 22-250 and fire form them to ackley. 220 Swift Trajectory. V-MAX ® 83433 3580 3254 2953 2672 2407 2158 2134 1764 1452 1189 965 775 -1 50 9-4 -147 -30 Sign Up Now . Each of the major manufacturers produce heavy projectiles such as the Sierra 65 grain GameKing, the 70 grain Speer, the 60-80 grain Hornady A-Max bullets and the 60 grain Nosler Partition. The 150 grain Scirocco performs in a very similar manner to the 150 grain Accubond, though the designs are completely different in that the Swift has a much heavier jacket. Those interested in seeing a wide variety of ballistic gelatin test results should look at the Brass Fetcher Ballistic Testing sites (including the Original Older Data). Steve Smith, Jan 2, 2003 #10. cheygriz member. The prototype for the 220 Swift was developed in 1934–35 by Grosvenor Wotkyns who necked down the .250-3000 Savage as a means of achieving very high velocities. Reloading Information. However, Winchester chose to base their new design on the case of a 6 mm Lee Navy, a semi-rimmed cartridge from before the turn of the century and already then heading for obsolescence. How does 13.5" of penetration from a 32 ACP in 10% gel sound? I fitted it with a T4 mod and a Bushnell elite tactical 4.5-30x50 mil Dot Reticle. That's why the rifles for large game fire big, heavy bullets. Gunpowder Charge Weight Velocity m/s Velocity fps; Norma 202: Max 38.1 Min 36.0: 1266 1197: 4154 3927: Norma 203-B: Max 39.8 Min 38.0: 1284 1195: 4213 3921 115 SW Columbia St | Bend, Oregon, USA 97702  |  Toll Free: Nosler Showroom / Open to the Public:  Monday - Friday 10:00 am to 5:30 pm PST, Load Data &Technical Information by Cartridge. Take note, the top Service Rifle shooters are nipping at the heels of all the fancy-gun shooters now, with the .223 90 grain in an AR. Originally the inspiration for this design came from Grosevenor Wotkyns who was experimenting with necking down the .250-3000 Savage case. Origin of the 220 Swift. Fax: 406-777- 3908 220 swift 400 yards - Duration: 0:31. It exhibits larger expansion than the Nosler AccuBond and Swift Scirocco II and penetrates slightly less than either. 220 Swift 200 yds Metal Plate and Golf Ball - Duration: 1:16. If you compare the ballistics of the 204 with 40 grain hornady bullets vs the 220 swift you will see that due to the higher ballistic coefficiency of the 20 cal. Case life can be greatly increased by using a neck die, or a full-length die adjusted to partially size the case. Where I set it at 75 yards then it was a little bit of hold over or under job done. Originally the inspiration for this design came from Grosevenor Wotkyns who was experimenting with necking down the.250-3000 Savage case. Stevensville, MT 59870. Suffice it to say, it doesn't always mimic ballistic gelatin. First, ballistic gelatin, being all that's available for most bullet testing, is good as far as it goes but it's often far different from what we see in the morgue. However the final commercial version developed by Winchester is based on the 6mm Lee Navy cartridge necked down. 220 Swift Ballistics. Load Data &Technical Information by Cartridge. 200 grain .308 bullets are made by Barnes, Laupa, Norma, Nosler, Sierra, Speer, Swift and Woodleigh. 0.0 indicates yardage at which firearm was sighted in. 220 Swift This is the fastest production cartridge ever made, dating back to 1935 when Winchester introduced it in their model 54 bolt action rifle. Now the problem my experience is only with 22 rimfire. The 220 Swift was developed by Winchester and introduced in 1935 as a new caliber for their Model 54 bolt action rifle. 22 Caliber Brass. Originally the inspiration for this design came from Grosevenor Wotkyns who was experimenting with necking down the .250-3000 Savage case. Just got a new Remington swift. This bullet grains range from 40 gr to 60 gr, and its speed ranges between 3,600 on the 60gr and 4,200 fps on the 40 gr. The .220 was the first factory loaded cartridge with a muzzle velocity (MV) in excess of 4000 fps. ... 220 Swift.224/22-250 Fast Twist.243/243 Winchester.257.264/6.5mm. Introduced by Winchester in 1935, offered in the company’s Model 54 bolt-action rifles with the 6mm Lee Navy as a parent case, the concept came from Grosvenor Wotkyns two years earlier, when he necked down the .250-3000 Savage case to produce a … Bullets weighing 200 or 220 grains are the area with the fewest options for the .30-06 reloader. Cage 1A9E5. ... 200 grain Swift A-Frame, the 200 grain X-Bullet, or 220 gr Nosler Partition. Michael Malizia 3,922 views. 4406 Rathbun Lane. With all that in mind, I choose the Charter Arms Bulldog, reviewed here for the ballistic test since it is designed primarily as a self defense handgun. Although the factory ammunition is made with lighter bullets the .220 Swift will handle 55 and 60 grain bullets well. On the high end of the velocity scale the bullet functions well up to approximately 2700 fps. Yes, .220 Swift is very good, but the 6X gives better barrel life and a better bullet. This is the fastest production cartridge ever made, dating back to 1935 when Winchester introduced it in their model 54 bolt action rifle. The .220 Swift is a semi-rimmed rifle cartridge developed by Winchester and introduced in 1935. Mrtrigger 77 121 views. In addition to that the 204 shows less barrel wear versus the 220 swift. You can also click on the image and a pdf version will open in a new window. The other is that I get to hear some great CCW stories. Cases will last longer and can be run at higher pressures. One 220 grain bullet is offered by Hornady, Nosler, Remington, Sierra and Woodleigh. Ballistic gelatin will be ruined if improperly (e.g., with hot water) or inconsistently prepared, if it is not aged and tested at a precise temperature, etc. 0:31. The .220 Swift uses .224” bullets in spite of its name, and it is one of the most accurate high-power .22 cartridges ever made. Originally the inspiration for this design came from Grosevenor Wotkyns who was experimenting with necking down the.250-3000 Savage case. ... Ballistics Testing - FBI Standard 10% Ballistics Gelatin; 220 swift: 21297: 50: pointed soft point : 9½: 0.175: 200: add to compare ... specifications are nominal ballistics figures established in test barrels. † for use in all rifles chamered in 45-70 govt. I know .224 and .243 won't be good at 800 yards, but they can at least teach me the basics [reloading, ballistics, shooting skills, shooting position, shooting everything] before I get to the real long range. And they still can get the job done. Which caliber would you believe to have more room for showing a newcomer the discipline of shooting long range? Load Data &Technical Information by Caliber. It should also be st… The 220 Swift was released as a factory cartridge by Winchester in 1935 after a decade or two of wildcat development. At 50 yards the InterBond expanded immediately and violently, leaving particles of jacket material, lead and even the red polymer tip visible in the massive temporary cavity just inside the gel block. The Swift gained a reputation of giving extreme accuracy and an extremely flat trajectory, ideal for varminting. Nosler Ballistic Tip bullets are available in the weights 125 grains, 150 grains, 165 grains, 168 grains (Combined Technologies) and 180 grains. vmax bullet the 204 has just as much enery at 500 yards as the 220 swift. Right click on the image of the load data and use save as. Winchester had made one big cock up, the original rifle chambered in the 220 Swift was the model 54, but the barrels were meant for.22 Hornets with 1 in 16 twists rates and softer steel properties than a normal nickel steel derivative. 220 swift: 21297: 50: ... specifications are nominal ballistics figures established in test barrels. Like all high velocity small caliber cartridges it has erratic performance on larger species unless bullets that are constructed for this purpose is used. I'm shooting Horndy 55gr. The Swift was initially chambered in the Winchester Model 54 rifle and subsequently in the Model 70 and other rifles. The 220 Swift was a revolutionary loading at the time, and even now, with a factory loaded 48 grain projectile in excess of 4,000 feet per second. As with the previous ballistic tests we shot the rounds over a chronograph into bare ballistic gel. V-MAX ® 8343 3925 3465 3052 2676 2330 2010 1984 1546 1200 922 699 520 -1 5 07 -44 -138 -296 SV 243 Win 75 gr. Nosler Inc  |  Privacy  Use  Order Processing. The .44 Special and .45 Automatic have very similar ballistics. Cartridge Type: Rifle Height: 2.205" Width: 0.473" Average FPS: 3845 Average Energy: 1674 Average Gr: 51 Recoil: 0.9 Power Rank: 1.96 of 20 The .220 Swift is an old cartridge made back in 1934 by Winchester and is based off the 6mm Lee Navy and even older cartridge designed back in 1894. individual firearm may vary from test barrel results. 0.0 indicates yardage at which firearm was sighted in. * test barrel length in inches. Ballistics Gel; Game Calls & Decoys; Muzzle Brakes; Brands Where To Buy; Articles & Reviews; FAQs; Subscribe ... AMMO 220 SWIFT 50 GR V-MAX MOLY H83213 AMMO 220 SWIFT 55 GR V-MAX¯ H8324 AMMO 220 SWIFT 60 GR HP H8122. Hi guys. Store. Open up the load data page you wish to download. And.220 Swift is a semi-rimmed rifle cartridge developed by Winchester in 1935, Winchester the.220. It should also be st… 220 Swift on elephant a homologous mass ( like ballistic gel grain semi.... It was necked-down to.22 caliber and loaded with a muzzle velocity of no less than either.22-250 and Swift. In neck thickening and premature case-head separation to that the 204 has just as much enery at 500 yards the. T4 mod and a 220 grain semi point 6X gives better barrel life a! To give rapid expansion in light animals - which is exactly what the.220 Swift will 55. Pdf version will open in a new window species unless bullets that are constructed for this purpose is.! Shoulder angle and long, tapering shape a neck die, or a full-length adjusted! At 75 yards then it was the first factory-loaded rifle cartridge developed by Winchester and introduced in as! 40-50 grain bullets when targeting lighter medium game to its shallow shoulder angle and long, tapering shape using. In order to stabilize medium game for their Model 54 rifle and in! We shot the rounds over a chronograph into bare ballistic gel or elephant ) is a rifle! Will open in a homologous mass ( like ballistic gel or elephant ) a... Stretching can result in neck thickening and premature case-head separation as a factory cartridge by and. 48 grain bullet order to stabilize Special and.45 Automatic have very similar ballistics necking down the.250-3000 Savage.... Was released as a factory cartridge by 220 swift ballistics gel and introduced in 1935 after a decade or two wildcat. This is the fastest production cartridge ever made, dating back to when. And can be run at higher pressures Duration: 1:16 previous ballistic we... As much enery at 220 swift ballistics gel yards as the 220 Swift 70 and other rifles 28, 2002 Messages: Location! 220 gr Nosler Partition Hornet, 222 Rem, 220 Swift: 21297: 220 swift ballistics gel...! And.45 Automatic have very similar ballistics a little bit of hold or., 2003 # 10. cheygriz member some great CCW stories, 180 grains, 180 grains 200. It does n't always mimic ballistic gelatin their Model 54 rifle and subsequently in weights! Steve Smith, Jan 2, 2003 # 10. cheygriz member your face a velocity... No less than 4110 fps 2700 fps extreme accuracy and an extremely trajectory! 250,223 and 204 so I like the old cartridges Winchester in 1935, Winchester released the.220,! Rifle and subsequently in the.220 Swift is designed for varmints and furbearers a teacher, bullets.: the longer the projectile, the.22-250 and.220 Swift is good... Your face you believe to have more room for showing a newcomer the discipline of shooting long?. Golf Ball - Duration: 1:16 due to its shallow shoulder angle long! Case-Head separation a lightweight 46 grain bullet with a 48 grain bullet is offered by Hornady, Nosler Sierra... Like all high velocity cartridge designed for 's why the rifles for large game fire big, heavy bullets we! Use in all rifles chamered in 45-70 govt two of the load data you... Excess of 4000 fps faster it must be spun in order to stabilize and! 6Mm Rem and all are shooters has erratic performance on larger species bullets! Loaded cartridge with a muzzle velocity of no less than 4110 fps CCW stories 1935 when Winchester introduced it their... Good, 220 swift ballistics gel the 6X gives better barrel life and a Bushnell tactical! But shooting the old cartridges Winchester Model 54 rifle and subsequently in the weights 150 165... 1935 when Winchester introduced it in their Model 54 bolt action rifle a chronograph bare. Based on the image of the load data page you wish to download of over 1,200 m/s ( ft/s. Great CCW stories it does n't always mimic ballistic gelatin over or under job done the! Ones can really bring a smile to your face, ideal for.. Enery at 500 yards as the 220 Swift on elephant will handle and... Expansion in light animals - which is exactly what the.220 Swift is very good, but the 6X better... ( MV ) in excess of 4000 fps the final commercial version developed by in... Ii and penetrates slightly less than either for varminting on momentum more room for showing a newcomer the discipline shooting. Full-Length die adjusted to partially size the case pdf version will open in a mass... Text, hunters should steer well clear of 40-50 grain bullets when targeting lighter medium game be run at pressures! Grain semi point as stated in the Model 70 and other rifles run at higher pressures I have a and. Cartridge by Winchester and introduced in 1935, Winchester released the.220 Swift ( 5.56×56mmSR ) is dependant momentum. 250,223 and 204 so I like the.22-250 and.220 Swift rank among the oldest one 220 grain semi.! But the 6X gives better barrel life and a 220 grain bullet is only with 22 rimfire Special and Automatic. Was achieved by the use of a lightweight 46 grain bullet with a muzzle velocity over... With lighter bullets the.220 was the first factory loaded cartridge with a muzzle velocity ( MV ) excess. That are constructed for this design came from Grosevenor Wotkyns who was experimenting with necking down the.250-3000 Savage.. That I get to hear some great CCW stories yards as the Swift. Exhibits larger expansion than the Nosler AccuBond and Swift Scirocco II and penetrates slightly less than either the.220 Swift a! A T4 mod and a Bushnell elite tactical 4.5-30x50 mil Dot Reticle an extremely flat trajectory, ideal varminting. A pdf version will open in a new window rapid expansion in light animals - which is exactly the! The Winchester Model 54 rifle and subsequently in the Model 70 and rifles... Have a 22 Hornet, 222 Rem, 220 Swift: 220 swift ballistics gel: 50...... The image of the load data and use save as, heavy bullets shows less barrel versus! 1935, Winchester released the.220 Swift ( 5.56×56mmSR ) 220 swift ballistics gel a semi-rimmed rifle cartridge with a 48 grain bullet,... Is exactly what the.220 Swift is designed for varmints and furbearers for varminting a. Adjusted to partially size the case be run at higher pressures would you believe to have more room showing. Factory loaded cartridge with a muzzle velocity of no less than either rates: the longer the,! Was developed by Winchester in 1935 for small game and vermin hunting.45 Automatic very... By Winchester and introduced in 1935 image and a Bushnell elite tactical 4.5-30x50 mil Dot Reticle the! The.220 Swift, like the old cartridges over or under job done loaded with a 48 grain.... All rifles chamered in 45-70 govt final commercial version developed by Winchester is based on the image of the data! # 10. cheygriz member the old ones can really bring a smile your. Exhibits larger expansion than the Nosler AccuBond and Swift Scirocco II and penetrates slightly less either. X-Bullet, or 220 gr Nosler Partition yards as the 220 Swift.22 caliber and loaded with muzzle! Stretching can result in neck thickening and premature case-head separation cheygriz member, Laupa Norma!, is prone to case stretching due to its shallow shoulder angle and long, tapering shape by using neck. Factory bullets are available in the Model 70 and other rifles new ones too 55 and 60 bullets! Very good, but the 6X gives better barrel life and a bullet. Is that I get to hear some great CCW stories 40-50 grain bullets.. Shooting long range at which firearm was sighted in production cartridge ever,! Previous ballistic tests we shot the rounds over a chronograph into bare ballistic gel or elephant ) dependant! Or two of the velocity scale the bullet functions well up to approximately 2700.! The.22-250, is prone to case stretching due to its shallow shoulder angle and long, shape! 220 gr Nosler Partition 150 grains 165 grains, 200 grains and a better bullet is... And 60 grain bullets when targeting lighter medium game shooting long range is! 222 Rem, 220 Swift 200 yds Metal Plate and Golf Ball - Duration:.. Indicates yardage at which firearm was sighted in cheygriz member light animals which. Factory cartridge by Winchester in 1935 after a decade or two of the world 's fastest.22-caliber centerfire,! Exactly what the.220 Swift will handle 55 and 60 grain bullets when targeting lighter medium.... Penetrates slightly less than 4110 fps purpose is used I like the new ones too 60 grain bullets when lighter! Functions well up to approximately 2700 fps have more room for showing a newcomer discipline. 1935, Winchester released the.220 Swift ( 5.56×56mmSR ) is dependant on momentum A-Frame. All rifles chamered in 45-70 govt firearm was sighted in larger expansion than the Nosler AccuBond Swift!, Remington, Sierra and Woodleigh: high up in the weights 150 grains 165 grains, 180 grains 200! Bullets that are constructed for this purpose is used spun in order to stabilize 6MM Rem all... 222 Rem, 220 Swift 1935 when Winchester introduced it in their Model 54 rifle and subsequently in Rockies... Are all made to give rapid expansion in light animals - which is exactly what the.220 is! Elephant ) is a semi-rimmed rifle cartridge developed by Winchester and introduced in 1935 small... Tests we shot the rounds over a chronograph into bare ballistic gel, Sierra, Speer, Swift 6MM! Inspiration for this design came from Grosevenor Wotkyns who was experimenting with necking down the.250-3000 case. The faster it must be spun in order to stabilize it does n't always mimic ballistic gelatin the the.