25 grains Varget + 55 grain bullet is going to be a good range blaster. It's accurate, but slow. About 2,700 fps from my 16" barrel. You can get it a lot faster, but groups opened up quite a bit.

In my experience, Varget's niche in that caliber is with 69 grain bullets and up. Personally, I really like H4895 with a 55 grain bullet.