Settled on a load.
Cooper model 52 26 inch barrel
83g rl 25
145 lrx Barnes
.25 off land's
Critical item for me was switching primers. Winchesters would leak gas at 3200fps rem 91/2 m are fine.
3500 sea level chronnyed.
Scared to try for anything faster. I believe I am at max velocity.
I have a Cooper model 52 and I worked up with rl-25 145 lrx. 80g was OK but 81 melted the brass a little around primer pocket. I just want to say make sure you work up.