Yea..its not uuncommon with 8MM ammo either.
Since most of its Berdan primed, I just go ahead and shoot it.
I got 600 rounds of 7.62x54r ammo once for 40.00 bucks...in stripper clips in the ammo carriers. About one out of every 5 was cracked. Although its not the best for accuracy, they all shot with no problems.