>>64376248
I don't have the tooling to properly measure chamber pressure just yet. I got the gauges, I just need an actual setup to try it out. Plan right now is to see if I can get my hands on an Etronx bht for the lifr of me I cant fucking find one.

>>64376198
Its less about the force acting on the bullet, and more the fact that if you're able to combust more black powder, faster, you have a more rapid expansion of gas at the chamber, which translates into a faster projectile, that needs less barrel to achieve desired velocity. Because its a hotter combustion, you get a cleaner burn, but desu its still fucking filthy. Cordite is infinitely better all things considered.