79 the 150's are bit light but that's about right.Getting the velocity without having things screwed to the floorboards is what it's all about.
The 150 SS II is all copper I think and maybe a bit gummy.
One of our knowledgeable match shooters on here ran his Mashburn to about 3300 with the 150 BT from a Broughton barrel,but ran his ladder and found the accuracy node at about 3250. Recently he worked with the 168 Berger but I can't recall his velocity. He ended up exactly where I did with the 160-162 bullets at 75.5 H1000. I get 3200 with those bullets.
He described the cartridge as a "big easy going slob", not at all fussy and temperamental like some 7 mags can be.
We have not run anything lighter than 160 in any of ours back here.
