Thread: Fast twist barrels

Originally Posted by zimmer

Here’s article from Accurate Shooter on the topic Twist versus Velocities.

How Muzzle Velocity Changes with Different Barrel Twist Rates « Daily Bulletin

And here’s Frank Green's (co-owner Bartlein Barrels) comment that he posted on the Oz F Class forum re that article.

“Not only did we make all those barrels in the test but we chambered them as well. So same chamber reamer was used in all of them and the barrels where all made at the same time. If I recall correctly all of the barrels where made out of the same lot of material except for the left hand twist was out of a new lot. So about as identical as you can make them.

It's always been my understanding that twist might have a small impact on velocity but for the most part it really doesn't in the grand scheme of things.

Later, Frank
Bartlein Barrels”

Greetings Zimmer and All,
There we have it. Twist makes no practical difference to velocity. Hard data should triumph over theory every time, especially theory not based on fact.
I saw an ad the other day for a Winchester rifle in .223. It had a 1 in 11" twist and was touted as being compatible with 55 grain projectiles. This is pure pandering to the ignorant. Both my 1 in 12" and 1 in 8" twist .223 rifles shoot the 55 grain projectiles equally as well and I expect that most will have the same experience. Perhaps the fast twist may shred some really tender projectiles but the thing that the 1 in 11" twist won't do is stabilise most of the high BC projectiles. Rant ended. Curmudgeon back in box.
Regards Grandpamac.