I have a TBAC on my comp gun, that might get sold despite my love for it just for more versatility. I have a gunwerks Elevate 2.0 on my 7SS that's going on the wife's 6CM. Recently acquired the new Tricer RP with the panlock for a good price and will go on my 7SS and maybe if I like it enough my comp gun. Otherwise will probably eventually get a MDT Cyke double pull for it since the gun is already 18lbs.
I've used both the atlas CAL and PSR and always appreciated them once deployed however I hate how slow they are to adjust.
Otherwise everything else is harris, they're simple, reliable, and don't break the bank.
For your purpose i might look at an elite iron they work really really well for heavy guns and are stupid stable.