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Yes, they are old and to make matters worst I have like 10 boxes of it! I've shot older stuff with paper shells and never had a problem.
Then shoot the rest in a cheap Turkish made gun...
Have you checked your shotgun's headspace and the bolt's locking lug? If headspace is too long, or if the bolt's locking lug or the receiver is worn, the pressure will push the bolt back a bit, causing the plastic to stretch, but the brass will tear like that.
I'd be curious to know how long the unfired shells are. *Assuming* the chamber and bolt are within spec, a shell that's too short, or a rim that's too narrow could also cause this.
Even if the other brands of fired shells don't have torn rims, do any of them show even slight fatigue in the same area?
Do the fired primers have any signs of over-pressure?
I'm no savant but shouldn't that crimp be more ironed out/more flat? Maybe the plastic hull has age hardened and not opening how it should.
Do you have another shotgun to fire these shells from? If the same thing happens, then it's the shells, and I wouldn't worry about it.
If you're a belt-and-suspenders person, you might take your shotgun over to Floyd's (2917 E 2nd) and see if he can check the headspace for you.