Today’s Puzzle

[JFrank]

Has anyone seen this before?
I’m also getting heavy bolt clicker
I may with help have this figured out but I’ll always take input.
Load-
6 BR-A
Berger 108
H 4895 - older lot
30.9 gr
CCI 450
Lapua brass sized .0015 at the base .0025 at the case shoulder
Bumped .002

 

[243winxb]

Maximum pressure with a weak firing pin spring?

 

[AJC1]

I would say you need to get the bolt bushed but that doesn't fix the heavy-lift problem

 

[Demi-human]

Has anyone seen this before?

Yes. Nearly always caused by too much powder.

Maybe check your firing pin spring.
(Dang, too slow to the draw! @243winxb got me!)

 

[forty_caliber]

I had a girlfriend with an outie once

First time I've seen a primer with one.

.40

 

[Walkalong]

That's wild, the primer is still very rounded on the edge. That's a serious "outie".

My guess is poor firing pin fit to the bolt, weak FP spring. Bolt lift hampered by the FP sticking forward a little? Just guessing.

 

[PWC]

Pistol primer?

 

[JFrank]

Weak firing is a definite possibility, we also think my lot of H4895 maybe Nuclear....
Just getting on paper today it’s obvious not breaking out.
The clickers I believe is the die not sizing enough at the.200 IMO

 

[edwardware]

Weak firing pin spring, and maybe oversized FP hole too. Is this sudden onset?

 

[JFrank]

Yeah
Only happened on about 8 of 30 rounds.
BAT B action on a proven platform so I don’t figure bushing the bolt is necessary

 

[edwardware]

BAT B action. . .

Dude, details!

Unless it's got a broken FP spring, I got nothing but pressure. I've never seen a primer cratering without flattening first. . . so I'm puzzled.

 

[JFrank]

Bat B action
6 BR-A
Lapua brass
Details Listed on the Original post
Crazy to see the primers sticking out that