The metal break surface looks like it has crystallized.
Well... it IS 99 years old!
Thanks for the help..... yes I'll contact one of you for a spare holdopen if I cannot get one here.
Once again, thanks
Is there any way this can be prevented?
Ammunition was certainly not too much- (I hope) S&B 115 gr. FMJRN standard velocity.
Or is it a case of "Happens sometimes with an older gun."?
"You takes your chances." ?