For hunting I only use actions that lock the bolt on safe or have 3 position safeties because of a bad hunting experience in cold snowy weather and a Remington bolt that opened, ejected the round and got filled with dirty snow and pine needles. I recently purchased a Howa 1500 barreled action from Brownells in 6.5 PRC and ordered a Rokstock for it as well. They have 300 Win Mag as well that I think fits your intended purpose and criteria...ammo everywhere around the world, threaded barrel for a brake or brake/suppressor combo, a Rokstock will help with the recoil management and weight requirements, but I don't think the Rokstock offers an AICS option, but the barreled action comes with factory bottom metal. The 6.5 CM does well enough that I don't think 30-06 gives you anything extra. I might contact McMillan to see if they'll do an inlet that isn't on their list for their new hunting stock for a Howa 1500 or my M70 300 Win Mag.