Originally Posted by notahd
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
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