So was the third round of 4831 one of only three that you had loaded with that charge? Or did you have more so that you could pull one apart and double check the charge? I've never really got good speeds with 4831, but had good groups with what little bit I've tried. H4350 is so easy to work with in a 260. Absolutely no guess work. I guess thats why its so hard to come by. Hope you have a really good hunt and your boy knocks a big one down!