L3n4rd,
What I mean is a firing pin that is part of the hammer.They are usually larger than modern ones,and since they swing in an arc,the hole in the breech face has to be larger also.They do extend past the face in firing, but rebound with the hammer.This leaves the primer unsupported somewhat,and may be the cause of the hole in the primer.I'm pretty sure S&B ammo will show less pressure than Hornady.Of course I'm guessing with all this, since I don't have the rifle "in hand".
Mike
Ah ha. That makes a lot of sense and mirrors almost exactly what Mark from New England Custom Gun told me could be going on.
Can you describe the repair/bushing that was done/added to your gun? I have an idea of what it might look like in my mind.
I also did a little more googling last night and found reference to a 9x74 R Förster cartridge. It seems like that could be one of the many 9.3x72s our there but I was unable to find a picture of it. Have you heard of it?
I still have to slug the bore.
If it comes down to it, are there any recommendations for custom die makers?
