Two of my buddies have used them, one the 12ga 3" Federal and the other the 12ga 2 3/4" Winchester. Accuracy was absolutely terrific; killing or stopping power was absolutely not. Recovered only 1 slug and it showed no expansion. 1st deer was hit 'Texas-heart shot' (to right of tail and traveled lengthwise into front shoulder) and traveled 500+yds. Had to shoot again to put down. His other deer we did recover (but no slugs), we tracked it about a mile and he put another 2 shots into it, till his cousin put it down for him (he was in a treestand and saw it was hurt/stumbling). Entrance and exit holes were same size, save his cousin's Lightfield shot. Other buddy hit and lost another deer and said it was a good shot, but never recovered. Since then, both have moved onto other slugs (one Lightfield, other Winchester Platinum tip).