I like the idea of the 6mm ARC even the 7.62x39 reallyI'd think of 6.5 Grendel or 6mm ARC with what you have in mind.
Although I think 7.62x39 could handle it too. Think I'll be switching over to mostly using it myself. Maybe a Howa with the various aftermarket floorplate setups. Good for deer to 200 meters, can shoot it a lot without needing to reload, ball powder available and very cheap etc etc
If you do go the 223 and Tikka route I've had good experience with them using 77gr TMK and 73gr ELDM and the loads took 24 gr of powder or less.
But I think it would harder to go past 250-300m with it?





















































