Different pressure signs from two guns

[Jose_Luis_G]

That primer that has the cratering does not look very flattened. I wonder if it is possible it that gun has excessive clearance between the bolt and the firing pin.

+1

 

[Jose_Luis_G]

Could be as simple as an oversize firing pin hole. Search for "bushing the firing pin" in these threads and you should get a wealth of information.

Sorry RonAKA, I read your post, guess it didn't register before I started typing

+1

 

[fguffey]

I was accused of being involved in some risky stuff, I thought I had done some serious planning, as it worked out I was safe because I had was working with time and distance, basically what that means is; how far did the bullet travel before the pressure behind the bullet got serious. I could have shortened the length of the chamber from the shoulder to the bolt face 'with my risky stuff', pulled the trigger and then render my rifle scrap.

F. Guffey

 

[Rsadams]

Are those Fed. Primers in the second picture?? I don't see any marks on the case head and I dont remember you saying there was any hard bolt lift..
I have a beretta 92fs that craters primers on anything as a matter of fact almost all brass I have picked up from them looks like mine.. They say the reason why is the fireing pin hole is to large.. Doesn't hurt anything , just leaves cratered primers.. Maybe they do it for function in a dirty environment.. Never had it knock hole in a primer either..Thats the only way I know how to explain it.. Maybe post a picture of the bolt face...?

 

[Jackal2016]

That is what I am also thinking. My Remington 700 SPS Varmint (17 Fireball) is like that and has cratered primers from day one on all loads.

Danny

I think that is normal from the Rem 700's. all 4 of my rem's do that. 204R, 223, 22-250, 308. Think it has something to do with the clearance of the firing pin from what I recall reading. With my 700's I disregard the cratering and watch for Flattening as well as other signs of over pressure.

 

[ireload2]

Please explain in detail because you included zero information.

I was accused of being involved in some risky stuff, I thought I had done some serious planning, as it worked out I was safe because I had was working with time and distance, basically what that means is; how far did the bullet travel before the pressure behind the bullet got serious. I could have shortened the length of the chamber from the shoulder to the bolt face 'with my risky stuff', pulled the trigger and then render my rifle scrap.

F. Guffey

 

[Fast14riot]

Reading comprehension is nil with Guffey, posts about sloppy firing pin hole clearance turn into a headspace issue that can't possibly exist except one time he proved someone wrong with his NASA grade ammo engineering...

 

[Webster]

Hello, I recently bought a brand new Bergara B14 chambered in 30-06, after testing both factory winchester ammo and my reloads in the range I found different signs of pressure on the primer from shooting my model 70.

Fired primer from Bergara shows signs of excessive pressure but they are normal from model 70. Identical ammos, my reloads use lowest powder loading, so it should be my B14's problem, please see the attached pics(B14 on the left, M70 on the right), my reloads use Hornady cases.
View attachment 1012960 View attachment 1012961

The case on the left has a texture imprint I have never seen before?

 

[Flouncer]

It actually could be just the difference in firing pin strike and not a pressure sign.
You don't seem to be flattening those primers; just making different impressions in them with each gun. You could measure the two fired cases from base to shoulder with a Hornady or similar comparator tool. You might see more "headspace" in one than the other as well.

What he said. And as said above also. . .. the low pressure load would be more of a problem. Those primers don't have anything wrong with them. That "splash" is what all my primers look like from my Mauser. Firing pin. And stay that way as I go up the powder charge ladder until I start to get flattening. Those primers have no trace of flattening IMHO.