I guess I've had good luck because the 260 accubonds have opened up on everything I've shot or seen shot when loaded in the 375 jdj.But since some like yourself have posted about problems they've had I have been wondering if Nosler has changed something (they thickened up the b-tips years ago without telling anyone)? It does seem funny that the 260 accubonds would expand on 250 lbs. whitetails (one load was doing 1900+ or -) and left an exit the size of a baseball 2 years ago. I guess maybe it's worth doing some testing when the weather gets better to see if the bullets made now act different then the ones made a few years back. Will try to post results if I can get to it.