A lead FNGC 250 gr from Beartooth with an inital velocity of 1200 fps (actually clocked 1198 @ 15') has 525 ft lbs energy at 150 yards if the BC is .194. This was clocked out of a 22" Handi using .357 Mag brass. It's a very long bullet, but works fine in the Handi chamber when seated in the crimp groove. I think the BC would be higher than that, but that figure is sufficient for CO purposes.