did you check the cases? were they cracked? win gray x 17 has had a bad reputation for doing what yours did. I sent a case back to win along with many split cases they sent me a coupon to replace it all. I even sent the rifle in for a look over, it was fine. your gun does not like that ammo, don't shoot it in your rifle and don't buy any more of it, win supreme is different and works better, hope this helps.