I have some of the 139 scenars loaded up with US869 (working up to 77.o gr) that I need to get to the range with. I was able to get 3,150 with RL-33 and 140 NABs. The 139 Scenar has a very short bearing surface.
The 139 Scenar is a super bullet. Shoots like a 140 Berger VLD, but is tougher.
IIRC, Rick (rcamuglia) tried WC-872 and I think US-869. He settled on RL-33 as the best .264 WM powder and he's burned a bunch of .264 powder. As you remember, RL-33 is similar to RL-17, made by the same Swiss company. It reportedly has a smooth pressure curve like RL-17.
Me, that's where I'd start with the .264 WM. With the 26 Nos, it's the other way around, 869/872 out perform RL-33.
DF
