Being doing a bit more research and quickload has a load of 64 gn of H4831sc doing 2900 ish at 60 000psi with a nice pressure curve and a 99 % burn in a 24 inch barrel. I emailed Berger and they came back with a max charge of 62.6 doing 2850 or so.
Think I'll drop down my ladder to start at 62 and work up to 64 and see what I find. I have a couple of three shot tests at 64.2 and 64.4 but anticipate not getting that high before seeing pressure.
Other powders look better for speed but supply is an issue. If I can get 2900 and accuracy with the 168 /H4831sc combo ill call it done and go hunting.
I'll post up my results on a different thread if anyone is interested.
Bookmarks