Ramshot TAC for 6 ARC

[StoneHendge]

So I am looking to work up a load for the 80 gr CZ for hunting with my bolt action rifle. Ill be working up the load on a 80 to 95 degree days. Per Hornady load data Tac is offering top velocity. Benchmark I expect will offer considerably better temp stability.

Hunting environment may likely range roughly 50 degrees cooler give or take 30 degrees as we have been known to see some extreme temp differences in mid November.

Per Hornady load manual, Ill be looking to give up roughly 100 FPS with Benchmark under the 80 gr CX.

Considering all copper bulles are really thriving at upper velocities. If the Ramshot Tac loads are printing easily less than MOA, at upper velocity, would I likely be wasting resources to do a load work up with Benchmark as well?

FWIW, I shot a lot of Grendel with TAC in the Phoenix winter/spring as a practice load. Was sub MOA on workup and went where it was supposed to. Shooting temps were in the 60s to 80s. Once the temps hit the mid 90s, the load
 completely crapped out on me. It was so bad I thought my barrel was shot out or my scope crapped out before I remember I was using a ball powder. It was a mild load (90 gr at 2700 from a 22") so pressure wasn't an issue. I don't think the issue was as much the 20-30 degree temp change as it was things getting kooky in the 90s, which has generally been my experience with ball powders. I guess my point is I wouldn't bother testing it in the 90s unless your going to use it in the 90s