50/70 bullets

[Kurt]

Bob, 140 years ago rifles didn't have that 45 degree chamber end either like they do now. Every rifle I have will make a ring with just about with each shot fired. It does not make any difference if the case is short or tight.
You might not feel them when inserting a cartridge, but just push a rod through from the muzzle with a loose patch and look at it when the patch clears the breach.
Take a look at the top one. It has more then one ring sandwiched together and my fired cases are .005" short of the chamber end to allow for flexing and spring back as the bullet releases from the case.
Ten shots fired ten rings.