I've loaded 130 grn b-tips for two different .270 win rifles that loved 54 grns of IMR4350.. The one I own now loves 53 grns of H4350 setting under a 130 grn Accubond, which I like as opposed to the B-tip, because it's not so explosive at close range!!( not trying to say that B-tips are like Nitroglycerin, or something)
But heck yes, IMR 4350, and the 270 win, bread and butter!!