It might be worth while to look at the length and profile of the firing pins. From a safety point of view I'd say it was mandatory.
There is a good chance that the pin pierced the cap allowing the propellant gasses to enter the action body. The increase in pressure can then blow out a bit of wood round the stock head, or at the very least severely weaken it.
I had this happen some years ago, fortunately on the right side of the gun so the sliver flew over my ear; for a right handed shooter the damage resulting from your pics show could have been disastrous.
Eug
Last edited by eugene molloy; 10/12/13 04:40 AM.