I have a GEW 98 mauser in 7X57. I been noticing deeper primer punches than I see in other rifles. This morning it actually punched thru a primer. Can you adjust the firing pin in this mauser? thanks, Roger in Texas
According to my book, that is very close to a maximum charge. Depending on your seating depth, chamber dimensions, or any of a number of variables, it may be too "hot" for your gun. I would suggest backing off .5 - 1.0 grain, loading up 20 rounds and shooting them to see if your primer pin is still too long. The odds are very good that it isn't your firing pin, at all.I am shooting a handload using 160 Sierra Spire with 45.3 gr of IMR 4350.
You're quite welcome...just be sure to report back to us, so we can all learn from what you find. I have been helped out several times since I joined this site, so I'm glad to pay it forward, when I can.broom_jm
That sounds like good advice. I'll back off to 43.2 grs of IMR 4350 (or 2500 fps in 4th edition Sierra book) and see how that cooks. As a second option, my current COL is 3.104. If I need to, I'll try to nudge it up to 3.124. Thanks for your advice. Roger in Texas
Mike -- you may have a good point there because I fired two more rounds after that primer popped and they worked just fine. After this topic help, I measured how far it extended and it is within tolerance....so it may be too close to a hot load. thanks for your input, RogerYou might have the odd soft primer or two, also. If the tip is rounded, well, a mauser really thumps the primers..... they are meant to do that.