[28Gauge]

I experienced the same problem with AA20's last year. I would lose about 6 or 7 hulls to splitting per box of factory loads. I should have followed up with Winchester about it but I never did. However, when I purchased 3 boxes of AA28's and found that the unfired shells were allready split at the crimp, I could not ignor the problem any longer. I contacted Winchester about the problem and they arranged to have the unfired shells shipped back to them for analysis. In return, they sent me $40 worth of certificates to replace my defective shells. I am happy to say that in my case, Winchester did care about keeping the customer happy.