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220 Swift/ 220 Ackley Improved

 
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  #1  
Old 10-14-2010, 10:04 AM
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220 Swift/ 220 Ackley Improved

I am looking to re chamber a rifle to 220 swift or 220 Ackley improved. I have been told to try a 220 Swift Ackley improved with a 1 in 12 twist with a 28" barrel. What are some of the advantages and disadvantages of the 220 swift and or the 220 swift Ackley improved. What I'm looking for is a rifle to shoot a tight group any where from 200 to 600 yards for varmint hunting or target shooting. Most likely I'm going to be useing 50 to 60 gr. bullets seeing that I have 5 other rifles chambered in .224 cal.
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Old 10-14-2010, 11:40 AM
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Re: 220 Swift/ 220 Ackley Improved

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Originally Posted by notahd View Post
I am looking to re chamber a rifle to 220 swift or 220 Ackley improved. I have been told to try a 220 Swift Ackley improved with a 1 in 12 twist with a 28" barrel. What are some of the advantages and disadvantages of the 220 swift and or the 220 swift Ackley improved. What I'm looking for is a rifle to shoot a tight group any where from 200 to 600 yards for varmint hunting or target shooting. Most likely I'm going to be useing 50 to 60 gr. bullets seeing that I have 5 other rifles chambered in .224 cal.
I'd personally forget the .220 Swift, and go strait to the 22-250 AI. Not any real difference between them and the cases are easier to come by as well as die sets. You can fire form factory loads in the Ackley chamber. Secondly I'd want a minimum of a 1:11 twist barrel for the 60 grain bullets. I've shot them in a 1:12 twist barrel at near max loads with a 22-250, and they really need just a little more spin. Thirdly, there is absolutly no need for a 28" barrel in that small of a case no matter which round you choose. A 26" would be the max, and really a 24" will do just fine; plus group tighter. Also when thinking of 500 to 600 yards shots your really looking at the bullets in the 70 grain and heavier area, so you might want a 1:8 twist barrel
gary
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Old 10-15-2010, 12:55 PM
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Re: 220 Swift/ 220 Ackley Improved

If over-bore is no problem, take a look at the .22-.243Win. A superb 'heavy for caliber' bullet launcher.
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Old 10-15-2010, 03:45 PM
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Re: 220 Swift/ 220 Ackley Improved

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Originally Posted by shortgrass View Post
If over-bore is no problem, take a look at the .22-.243Win. A superb 'heavy for caliber' bullet launcher.
a 22-250 AI actually is fairly close to the 22/243 clones. But if you want to get real serious, then look at the 22 Vias. The 6mm Vias will push a 70 grain bullet faster than the Swift will push a 45 grain bullet. But also figure a shoulder set back in five hundred rounds. There's another round that falls about halfway between the two, and if memory is right, it's a Greanleaf idea
gary
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Old 10-15-2010, 03:55 PM
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Re: 220 Swift/ 220 Ackley Improved

I'm still weighing in on what I want to do. I've looked into the 22-250 improved and a couple different articles. There is a lot of good possibility. I got a couple weeks before I make a decision. Being that I have about 1, 000 once fired 22-250 cases I may go that way.
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Old 10-15-2010, 05:47 PM
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Re: 220 Swift/ 220 Ackley Improved

Quote:
Originally Posted by notahd View Post
I am looking to re chamber a rifle to 220 swift or 220 Ackley improved. I have been told to try a 220 Swift Ackley improved with a 1 in 12 twist with a 28" barrel. What are some of the advantages and disadvantages of the 220 swift and or the 220 swift Ackley improved. What I'm looking for is a rifle to shoot a tight group any where from 200 to 600 yards for varmint hunting or target shooting. Most likely I'm going to be useing 50 to 60 gr. bullets seeing that I have 5 other rifles chambered in .224 cal.
The 220 Swift is a very good performer and is only bested by some of the big wildcats
and the 223 WSSM in velocity.

I have built many of them and they all shot well under 1/2 MOA and the velocity is over
4000 ft/sec with Factory ammo and can be loaded faster if you want to.

Factory ammo is available and does not cost an arm and a leg.

With this cartrige there is no real reason to wildcat and deal with fire forming and special
dies.

The twist should be 1 in 12 for 50 to 60 grain bullets. 1 in 14 will work but if you wanted
to use 70 grain bullets it is marginal. The 1 in 14 is best for 35 to 50grain bullets.

If you like the Swift go with the standard SAAME Swift and don't look back.

J E CUSTOM
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  #7  
Old 10-16-2010, 09:08 PM
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Re: 220 Swift/ 220 Ackley Improved

Quote:
Originally Posted by shortgrass View Post
If over-bore is no problem, take a look at the .22-.243Win. A superb 'heavy for caliber' bullet launcher.
Im currently in the build process of a 22-243. Wanted 22-250-ai vel. but hate fireforming cases, gunsmith says a little hard on barrels but they make them every day. any in put on the 22-243 would be appreciated.
Defiance action
Broughton # 7 8 twist
H&S stock
RBros. gunsmith

mike
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