In a boltie there are better 6mms than the ARC. Dont know a thing about the Turbo 40. But I agree with with Eric_F. For a factory GP 6mm rifle probably a 6BR. For factory 6mm hunting rifle probably a 6mm Creedmoor. But they take a third more powder to get 200-300 fps more than 6BR, and running over 3000 FPS really harshes your barrel life. Maybe a 6BRA for barrel life and rolling your own. Like the BR it has less recoil, not that the Creedmoor is horrible.If you go 700 chambered in it look at the turbo 40. Much better imo
I think you are correct better if ones exist for a bolt like a dasher. But I never get why the argument of fireforming is a hassle. I’ve never had a rifle that I can take new brass and have it the same capacity after firing. So virgin brass gets you close but I wouldn’t do my finale load on it if looking for perfection and maximum FPS. If you don’t care about that then standard ammo shoots very good out of the chamber while fireforming. So to me the first firing is always getting you close enough but the second gets you were you want to be so fireform is not really a hassle. I can shoot factory rounds with enough accuracy to get by and after that it’s extra FPS.At that point, why not 6 BR and save yourself a lot of trouble fireforming and getting an unusual bolt face? I've got a 6.5 Grendel and a 6 BRA, they're really similarly sized.
Looking forward to a 257 Ocelot myself.I guess I'm too late for the Bluejay, but for the rest of you following this thread, go to Mad Dog Weapons Systems. He has a host of higher velocity ARs, with cases that are not that difficult to form. I have the 7mm Valkyrie, consistently shooting groups less than MOA. My current hunting load is a 130 gr Speer at 2900 fps. It shoots 1.5" at 200 yds. It may be replaced by the 136 gr Hammer @2732 fps and a 2.05" group @ 200 yds. The 140 gr NBT does a 1.28" group @2680 fps.