I'll have to try them. I've got a Mossberg 500; couple of months ago, I ordered a Mossberg cantilever rifled barrel with scope and accuracy was just pathetic with Hornady SSTs, Hastings, Remington copper solids, Brenneke KOs, and Lightfields. Called Cabela's and they agreed to exchange the barrel (after I put probably forty or fifty bucks worth of ammunition down it). Still don't have the replacement but we'll just have to wait and see I guess. Did you clean your barrel between shots?