Just an update! ShootDots, I was wondering if you got things ironed out with 150 SMK? I recently put new barrel on 6.5 x 284. Kreiger 8tw 26 inch 1.250 straight. Decided based upon what I read on this thread to try H1000 and I was pleasantly surprised! Ran a latter test at 100 yds and got best results at 55.0 gr H1000 with 150 SMK (Weights 149.90--149.98). After 15 shots and cooling barrel every three shots...cleaned barrel! Next 4 groups were great at .340, .215, 210, .260 at 55.0 gr. Cleaned again, moved out to 300 yd...3 five shot groups .750, ,650, .650. Velocity is only running 2850-2860. No speed demon but really accurate. I'm a big Berger 140 Hyb fan, but really starting to warm up to the 150 SMK. I ran a few jammed .010 and a few jumped .006. Jumping .006 gives numbers you see here. Barrel never got hot to the touch as with H4350. Barrel will speed up, but so far very pleased! Any more reports on jacket failures?