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Hi Guys and Gals,
I exercised my C&R the other day and picked up a 1917 Amberg Gewehr 98, all matching numbers. Upon disassembly I found the firing pin tip was broken off. This morning I decided to re-tip it and left it long. I'm wondering what the correct pin protrusion should be.
Thanks in advance!
About 55-65/1000", if I recall correctly (just checked - yes, see Kuhnhausen P.57). Applying the old engineer's motto : you can file it off, but it's really difficult to file it back on again, I would leave about 70 in the raw cut state, and then take great care with a diamond lap to file a smooth rounded tip, whereby a couple of thou' will be lost. Then try it out - take a good look at the primer indent under an eyeglass. Any signs of penetration? If so, remove no more than 5/1000" and try again. As most old service rifles will be a couple of thou' looser in head clearance than a new one, do not try to go any shorter.
Thanks, Patrick! I have it at 0.070 right now. Back to the lathe with it!
The truncated firing pin;
https://www.milsurps.com/images/impo...160cc2c4-1.jpg
Proto firing pin tip installed... The sacrificial drill shank is inserted 0.375" into the firing pin body and silver soldered in place
https://www.milsurps.com/images/impo...4706f494-1.jpg
After shaping and setting pin protrusion;
https://www.milsurps.com/images/impo...83150255-1.jpg
Soon I'll be able to assemble the rifle and test out my first firing pin rebuild.
Very good! That looks like a neat job.
Very nice work.