Off-center firing pin indentations?

[Mr_Happyface]

I recently re-barreled my AI with a barrel that was chambered by a known high end builder. I noticed my brass shows a sliiiightly off center indentation in primers from the firing pin. I never fired the rifle with the original barrel so don't have anything to compare it to.

I thought at first I was seeing things, then I rolled it on a table and saw the indentation 'wobble', I took a mike to it and was actually able to measure the distance, I don't remember the actual measurement; it was very slight - but measurable.


Wondering if this is something I should be worried about.


To answer the "how does it shoot" question beforehand - I'm in the beginning stages of working up a load, so no idea just yet.

 

[Mr_Happyface]

Nothing?

 

[6brshooter]

It won't cause any issues. I have saw many point blank BR rigs that had obvious off center fp hits that consistently shoot .1s. My fn spr a3g is off some, basically i have had more precision bolt guns off center than dead center. Don't sweat it, find a good load and roll.

 

[Graham]

Don't worry about it.

 

[Mr_Happyface]

Good to hear.

Surprising that in a sport where concentricity is everything something like that wouldn't matter, I was thinking that it might cause larger SDs due to inconsistent primer ignition but I guess if it's hitting the wrong spot the same way every time that's consistent in and of itself.

 

[Graham]

Off-center firing pin indentations?

Concentricity isn't everything. And where the primer gets hit has nothing to do with either inconsistent ignition or the location of the flash hole.

 

[Mr_Happyface]

My thought was that if the primer anvil is shaped like a V with the pellet being between it and the cup - striking the primer anywhere but the center of the anvil would cause the pellet to ignite inconsistently leading to inconsistent ignition of the load itself. But if you guys are saying that's not the case, fuck it, works for me.

 

[Gunfighter14e2]

My thought was that if the primer anvil is shaped like a V with the pellet being between it and the cup - striking the primer anywhere but the center of the anvil would cause the pellet to ignite inconsistently leading to inconsistent ignition of the load itself.

No pellet at all, just "Yellow Cake", that gets put into the cup wet.
You can have the pin bushed to where ever you would like the hit to be, but it won't shoot any better. Having it done does makes many feel better about there sticks.