I ran the stuff through my S12 after I first got it and It runs really good. I have a friend who runs a gun smithing shop and wanted to know how it worked so he could sell it. I got to put it through an 870 and my S12. It patterns alright at 15yrds and the slug is dead on further out. It also went straight through a piece of stump that was about 7in thick. With that said, it is, as already noted, quite pricey and i would rather just shoot slugs instead of this because of the price. As a side note this is also not a defensive load, it was designed for offensive purposes, if you were to use th