Range Report 300wm MK248 MOD 0 - excessive pressure?

edd1e22

HNIC
Full Member
Minuteman
Jul 1, 2002
224
107
45
San Jose
I recently started shooting an old batch of what I believe to be mk248 mod 0 ammunition(FC 93) marked brass and was having a bit of trouble extracting. When I got home, I noticed my brass had these round marks in the back which after a bit research, appears to be extractor impact marks from the brass being shoved back into the breach face i.e., excessive pressure.
IMG_20190805_185953.jpg


The primer also appears to be slightly bulged upward around the strike mark
IMG_20190805_190203.jpg


I heard this is rather normal for this round and besides shortening the barrel life, is still ok to shoot. Can the pros on here give me their 2cents? I'm shooting this out of an AI AWM if that matters.