Here's a post from 2 years ago on my experience with the ammo.
I bought 2 boxes last December for my 375 Winchester and here's a picture of 4 empties. The rims where they crimped the bullet are torn off (God only knows what this did to my barrel) and 1 case split. I read a lot of reviews on this ammo before buying and most never had any trouble but I did. Thought there might have been something wrong with the chamber in my rifle but I've since reloaded several hundred rounds with Starline brass and had no troubles.