Hi. This may have been covered in the past, but I didn't find any search results...

I took my new Model 93R17 TR to my range today. Out of the 10 shots I fired to zero it, 4 of the cases has cracks in the case, in the shoulder area. I have several other .17 HMRs and don't recall this problem. Yes, it is 'old' ammo, but stored indoors....
Gun shot fine, had no idea of the cracks, until I picked up the brass.......

Any ideas/similar results????

thanks
ron