I'd be concerned. I'd do a 100% brass check the next time I went out and shot it. Even if you're not using Tulammo and changed to Golden Tiger, Wolf, or one of the Bears, that steel cased berdan primed ammo sometimes causes popped primers and there's really no way to foresee when or with what brand it's going to happen. I had a Sino-Banian that gave me these results a while back regardless of what steel cased ammo I used. Notice the two on the left, though they aren't popped, they still are bulging outward causing an odd 'cratering' look to the primer where the pin struck. I've gotta imagine that they are forcing the FP back as far as it'll go when this happens:
Turns out my issue was the FP had a square edge on it:
I rounded it over and the PP problems went away:
I'm not saying this is what your problem is (in fact I've only ever found one other guy who had the same problem as me and was able to fix it himself), but it's good to get to the root cause of the problem.