RL33 might be too slow for the 250s. Or maybe not! As far as data goes I'd start around 110 grains and stop when you can't cram any more powder into the case. Max load with the Berger 300s is 118 grains in my gun, which is compressed quite a bit.
I found good accuracy using 107 grains of H1000 behind a 250 grain Accubond in my rifle. Seated to 3.800". This is a few grains below max load but its very consistent, easy on brass, and gives me just under 3k fps.
Thanks for the info. The H1000 might be what I end up with. I have been using rl25 which works good but am just wanting to try something different that might be less temperature sensitive.
I haven't tried any 300's I might. My barrel is a 1 in 11 twist so I was thinking it would probably like the lighter bullets better.For the big WBY case I would get some Berger 300s to get increased down range energy and wind performance then run it up to pressure with N570 (if you can find some) or RL33. Either will work well.
I haven't tried any 300's I might. My barrel is a 1 in 11 twist so I was thinking it would probably like the lighter bullets better.