The first several boxes of Hevi-13 had issues as well. The buffering would leak out of the bottom which was never sealed properly or at all. I sent them all back and they sent me replacements but one would think that for the price of them you shouldn't have those kind of issues. I can't see any advantage of the LB over the Hevi's in my guns. Nothing against the LB but I'll probably never switch to them due to my stock of Hevi. I found a gun shop that had gone under and the guy who got all the inventory sold me about 30 boxes for $14 each. Should do me a couple years ) Of course, retirement is only 6 years away lol...