I just picked up some 140 xtps for my m66. Ive found data with unique up to 9 grains but aliant lists 8gr as max which seems light. I loaded a few up to 8gr to just be prudent. Aliant lists 8grains at 1185 and am just wondering what you'll have gotten.
I need to get some more 2400 but wanted to try unique. I figure the 140 is good middle ground for my 2.75" barrel.
Sierra lists 9gr as max at 1250 and 1500 out of a rifle. Not a barn burner but im thinking that would be a good load from coyotes up to deer.
I know you can get more velocity with a slower burning powder but i think the 140gr xtp is perfect for 1250-1500fps.
If 8 doesn't show any pressure signs ill work up a bit i guess.