More brain dump than experience but...

by Hoot , Diversityville, Liberal-sota, Wednesday, April 20, 2016, 06:19 (3078 days ago) @ John Meeker

Things I would look at:
Bolt face
Firing pin tip and protrusion
Fit betwixt the two
Clear firing pin channel/main spring
Primer type
Brass type with respect to primer pocket
Flash hole size (reaching a bit)

Not much of the above would explain the 'pin hole at the edge' trouble. Just thinking of things which might affect the firing pin to 'smear' the indentation.

Going from memory (don't have an Arisaka), it's a '98 Mauser-ish design. It should retract the FP upon opening the bolt...at least I'm pretty sure it's cock-on-opening. That should negate any FP hang-up. Hmm...pictures should help.