I won't use Winchester powders in general -- bad temp sensitivity. Exception for me is 296 AKA H110 -- I use in 44 mag.

IMR4350 is less temp sensitive than 760, I believe. H4350 is probably better yet. IMR4451 is also good.

I prefer classic.
Semper Fi
I used to run with the hare. Now I'm envious of the tortoise and I do my own stunts but rarely intentionally