Quote Originally Posted by charlie b View Post
Not in gross terms. When looking at the rifle as a 'system' there is a balance of forces from the bullet and ejected gasses. Since some of those gasses go to the rear the net linear force to the rear is reduced.

When looking at the chamber/barrel interior as a 'system' it still sees the same pressure curve.

BUT..the gasses ejected at the muzzle may present more 'resistance' to the bullet and gas path that could raise the chamber pressure slightly (kinda like the bullet resistance function in the internal ballistics programs). I've not looked at the analysis for that. I recall a section of the Army Internal Ballistics documentation that dealt with muzzle brakes. May have to look that up.
Makes sense. Thanks.