I have had a breachblock blow out, not once, but twice, once using +p (bad I know, was using a long barrel luger and couldn't get it to cycle), the second was just a failure.
As said before, its your choice, they were made for shooting, but you break a part, its half the value.
your choice...
I have known many guys who say "I don't own a gun I won't shoot" and then I see that they have a 98% Mauser and I just think, well, my mauser will be worth more, because this one will slowly become a 95% gun
Ed