bolt face erosion??

Frogman77

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Joined
Feb 1, 2009
Messages
193
is the narrow dark ring around the firing pin hole considered bolt face erosion? Is this from leaking primers? or is this normal after firing? This isn't my bolt, I found this pic on another forum.

 

Gene

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Joined
Jan 23, 2007
Messages
1,326
Location
PA
From leaking primers, but does not affect its functioning. Check out all the soot residue around the bolt face. Needs a good cleaning.
 

J E Custom

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Joined
Jul 29, 2004
Messages
10,502
Location
Texas
is the narrow dark ring around the firing pin hole considered bolt face erosion? Is this from leaking primers? or is this normal after firing? This isn't my bolt, I found this pic on another forum.

If it is actually a groove It is from a continued diet of hot loads and/or loose primer
pockets.( very bad ).

By the looks of the bolt, cleaning is in order and then inspection. It might be primer seal
from shooting military ammo that has built up over time due to improper cleaning.

If it is just a build up of the primer seal (It's like fingernail polish) then it just needs cleaning

If it is erosion it has gone to far and should be replaced because of continued overpressure
loads that could have over stressed the bolt. This condition is NOT normal and should be
stopped for safety purposes.

J E CUSTOM
 

Frogman77

Well-Known Member
Joined
Feb 1, 2009
Messages
193
thanks guys,

I'm getting a similar ring around my firing pin hole, but it comes off with cleaning. My pockets are still tight when seating primers. someone suggested I try a primer pocket uniformer to improve the seal. I'm gonna give that a go and work my load up again. No other pressure signs at this time.
 

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