I need a good explosive varmint bullet for my 6mmbr. I'm looking for something that will give great performance at 400-600 yds. My rifle really likes the 90 berger match, but don't figure they will expand correctly.

The specs on the barrel are pac-nor 1/8 twist, .272 neck, .085 freebore. I've tried the 87 vmax with .015 jam, got decent groups at 30.8 varget, yet up or down .2 grains, accuracy not so good. I don't like loading for such a small accuracy node. It's a savage action, so really don't want to get too hot of a load.

Anyway, any ideas what to try next?

65, 75, Vmax, 105 Amax?