I'm about to do a ladder test with US 869 and 140 berger VLDs - prior to working this up I shot the factory 140 accubonds. Was getting around 3250 out of the muzzle. Farthest I've shot for now is 521. I've got about 100 factory rounds through it. I've shot several twofers on pigs, they all drop right where they were shot. All of the whitetail I've shot have run between 20 and 200 yards; hoping the VLD's change that. All in all I'm a big fan of the round; we'll see how long the barrel lasts...
US869 is supposed to be the best powder for velocity. I'm gonna try 147 ELDs first and see if they'll stabilize in my 8.7 twist barrel. I have some 140 Accubonds for hunting too. If I can get the 147s to 3200fps, they'll stay supersonic over 2000 yards. That's my goal with this rifle, until I smoke the barrel and chamber a new one for 33 Nosler.