I inherited a BLR in 243 three years ago when my stepfather died and a few boxes of older ammo in factory boxes. One shell ruptured one day last year at the range. I found out from my BIL that a friend of his had reloaded several boxes of ammo for my stepfather and we think that these were some of them. Needless to say that I quit shooting that ammo, but the rifle is still not quite right and I need to take it to a gunsmith to check it out even though it doesn't show any damage.

I would be careful.