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Old November 17, 2017, 02:08 PM   #6
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Join Date: September 5, 2010
Location: McMurdo Sound Texas
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Originally Posted by reynolds357 View Post
This is another reason that shorter barrels are more accurate than longer ones. (Assuming velocity loss does not become an overpowering issue)
That's too blanket a statement to hold water.
There's an optimum length barrel for every caliber AND projectile AND charge. That's why handloaders spend serious time tuning with .1 grain differences in charges and projectile weights.

Modeling internal ballistics is pretty good. It's basically a physics equation (with a lot of variables) where the output is a muzzle velocity that includes motion in 3 dimensions, not just 1.

Gerald Bull did some great research on optimizing large howitzer's barrel lengths. Others have done the same for small arms.
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