Not exactly another bolt click thread.

[Ccrider]

Just curious. Have any of you discovered that once the brass is fired a certain number of times that you can not avoid having bolt click at the top of the lift after firing it? I have found this to be the case with one of my ppcs and know that the brass is being sized properly and it is consistently shooting well.
Normally, the primer pockets go before I get to this many refirings. But in this case, the pockets are fine at 15+ firings.

 

[orkan]

This is typical of soft brass, and will require a substantially greater shoulder setback to get more firings. However, the true answer tends to be to try to find better brass.

I routinely fire cases to failure, which can take dozens of firings... and this behavior is a staple with brass that is soft. Consult the recent 22 creedmoor brass stress test videos on our youtube channel to see that behavior in action.

 

[gunsandgunsmithing]

Still a bolt click thread. Lol!

No two chambers are exactly the same, even with the same reamer.
The old brass is trying to go to its MOST expanded state, which is under pressure, and the barrel grows under pressure!!

So, the brass(even IF everything else were EXACTLY the SAME) is trying to go to it's MOST expanded state. So, if one barrel makes a tad more pressure(all else perfectly equal), it will grow more in that chamber and eventually get tight in others.

Hope this is clear enough. It really has nothing to do with the dies, after a certain point. Just the largest state it has seen. IME, that's where it will EVENTUALLY want to go.

 

[Ccrider]

Ok. I actually fireformed this particular set of brass in a different barrel that was chambered larger. Never thought about that as being a problem. I will fireform using fouling shots in this same barrel from now on and see if that makes a difference. Between a rickety wooden bench and upsetting the rifle on bolt cycling, it makes for interesting times trying to shoot in the small groups. Not to mention the Gremlins.

This is good box Lapua so I figure the brass is fine.

 

[orkan]

I actually fireformed this particular set of brass in a different barrel that was chambered larger.

That'll do it every time.