I do not think you can get the 7MM 08 in a 18 inch barrel. You cannot get the 270 in a carbine.

I have a 760 in a carbine 308. It shoots 1 inch groups all day with facotry ammo. Never had the trigger done either but it could use a alittle work and would be even tighter. My hunting biddies have it in a 270 and it shoots great !!!!!! 1 inch all day