Thanks guys, I did try some IMR 4350 and looked promising but ran out before I could do more testing. I just found that the powder didn't trickle well because of the long grains of powder. I have tried 414, varget and didn't work to well as for accuracy. Looks like 4350 might be my next purchase of powder although I sure wouldn't mind trying some other powders that were mentioned. I guess I'll see what's available. This rifle will be used for coyote hunting.
I have tested 4831 with my other 260 Rem. shooting 140 gr Accubond and was very pleased with the results for deer hunting...