Search:

Its probably one of the most common misconceptions in reloading.You see it posted a fair bit, theres another thread asking about powder for a short barrel running now. .

I can say from...

Yes if you chop a barrel you loose velocity. Iv said that already. Yes you may not be burning all of the powder because of the shorter barrel and there could well be some kernels that didn't ignite...

A slower powder will generally give a flatter curve and therefor more area under curve( it will provide peak pressure for a longer time) proving more initial push for want of a better term, better...

Yes some pressure is available till exit which is why longer barrels give higher velocity but the amount of pressure available is determined early in the process. As the projectile travels down the...

But thats not how internal ballistics perform and the "engine driving the car to the end of the track" is the myth. With even the slowest powder the effect the burn has on the projectile is dropping...

Iv got an ok understanding of burn rate and Iv had QL for quite a few years. My reference to reduced muzzle pressure with a faster burn rate was an example of why a faster burn rate might be...

Considering only velocity, the best powder burn rate is governed by the projectile and the chamber not barrel length. The "faster powder for shorter barrels" is mostly myth.
There may be other...