I started with Varget, and have stayed with Varget...
I had poor results with H335 in both our Mini-14 and Rem. 700 bolt...BUT, every rifle is different. There is no substitute for trial and error when doing load development.
It may be helpful if you post the specifics of the rifle. Make? barrel length? Twist?
Varget is temp stable (a big + here in FL), and also happens to be the top choice for the other two calibers I load ( .308 and 7.62 x 54R).
Military (5.56) brass may need the primer crimps removed prior to reloading.