mauser c96 pierced primers

[Colt Fanning]

Howdy
I have a c96 that pierces primers.  I have cut about 3/16" off the hammer spring and it now punches the primer deeply.  Is shortening the firing pin recommended?  I am reluctant to
lighten the hammer spring since this affects the recoil of the bolt on the c96.  BTW  it is a 7,65mm converted to 9mm.
Regards
Colt

[Scattered Thumbs]

Instead of start cutting springs. You should have the headspace checked instead.

By the way. Reducing any spring power, and especially the main spring, in a C96 is just an invitation for disaster.

Edit. I will stress this point. If you do not know how the lock time works on a specific locked breech semi auto you should leave it for a competent gunsmith.

[Colt Fanning]

Thanks, that is good advice.
Regards
Colt

[DeaconKC]

Get a replacement Wolff spring and see how that works.

[Cap'n Redneck]

Mr. Fanning,
Are you by chance using primers that are considered soft?  (FEDERAL primers springs to mind...)
If so, you could try changing to a different brand and see if that helps...

[Colt Fanning]

howdy
I should have mentioned that the c96 is a 30 cal that has been sleeved to 9MM.  After lightening the hammer spring it punches the primers deeply without piercing them.
I has about .020 In of head space which I see no way to correct.  It shoots correctly with my reduced loads and I have ordered a new recoil spring from Tom Heller for 30 cals that
have been converted to 9mm.  I am using Winchester primers.
Thanks for all the responses
Colt