I used the 150 NBT in a 280 AI but back in '93-96. Supposedly, this was in their "too soft" phase. I shot several doe antelope, one pronghorn buck, in WY and an Exotic Ram ( in Texas) w/o ever capturing one either! The pronghorn buck was 250 or so, hard quartering shot, left flank to right point of shoulder. He ran into it as he was fleeing my first shot at him running across my front at 100, ha. The does were 60 and 75 or so. In TX I shot a Corsican/Mouflon cross at 50yds, through shoulders, pass through. Granted, I could only get 2950 with accuracy out of its 22" pencil barrel Mod 700 Mtn Rifle. But it was a tough bullet. I loaded the Speer 160 HC for it when my friend bought the rifle from me. He shot a cow elk around 60yds (base of the neck). It was started at 2800, again, with its most accurate load. Seems I only gained 50fps from that 22" barrel. I have always felt 26" barrels are best compromise for handling, yet burn most of the powder. I just saw a tricked out Vanguard in 7mm RM but it was the one with the 24" barrel. If I find a good deal on a Mod 700 I like, a 7mm RM/26" bbl, I plan on having it reamed to either the 7mm Mashburn SM or the 7mm/300, both very much intrigue me. OTOH...there is that Bergara B14 in 28....lol Thanks guys!