I like H4831SC and usually shoots very well. It gets plenty of velocity, and doesn't lose that velocity in cold weather.
Some people swear by R22 but H4831sc was the powder for 200's. It's gonna be a case full of slighty compressed powder but it should fit and (within reason)made about 2900fps/24".
R17 is H3450 plus about 50fps.
I shot 180's at about 2950 with H4350, 3000 or so now with R17. Same accuracy and from 10-90F I would't be worried about temp sensitivity from either. Colder than that and maybe H4350 would be better.
Only reason I switched was because powder was hard to find a couple years ago but local store had a bunch of same lot# '17 on the shelf.
Like Brad said, Alliant data was too hot for my rifles, about 2 grains over what worked.
