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jcm412
February 22, 2005, 10:06 PM
What is the optimal barrel length for a .220 swift and a 22-250 benchrest/varmint rifle? How does barrel length effect accuracy?

cntryboy1289
February 23, 2005, 04:18 AM
I would think it would be atleast a 24" barrel, but a 26" would be even better. The length of the barrel will have a dramatic affect on velocity of the round. There will be a loss close to 100ft/sec/inch of barrel being removed. A lot of calibers need the length to get the most velocity that can be obtained from using slow burning powders. I would think the varmint calibers you asked would need more length to perform well. Manufacturers cut cost by shortening the barrels which is why most calibers come in a 22'' barrel, but some just don't perform well with less than 24".

Since a varmint rifle is normally used in a stationary situation, using a longer, heavier barrel lends itself to more velocity and a little better accuracy normally, but not in all cases.