Quote:
Originally Posted by Littlebear
Thanks 320!
Pls confirm that a barrel length will affect bullet velocity, since a longer barrel will be able to use the power of the powder charge for a longer time/distance in pushing the bullet.
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It certainly can and usually does, but it is not a guarantee. And it depends on the gunpowder used. There is a limit to the ROI, though.
Some powders burn very fast so the powder burns up before the bullet goes too far. Those powders are usually used in pistol cartridges. Slower burning powders are normally used in rifle cartridges.
This guy did a test to see how barrel length affects velocity for the 5.56 NATO cartridge. The ratio of barrel length to velocity is not linear.
https://rifleshooter.com/2015/12/223...s-to-6-inches/
Here is similar data for the 9mm cartridge.
http://www.ballisticsbytheinch.com/9luger.html