Re: long range rifle advice
Given you want to shoot out to 800-1000 yards and hunt medium to big game, I believe that could rule out the 308. While, it can be done, it is not an optimal caliber for your requirement. That leaves the other two calibers, the 300 Win Mag having an edge for large game. Your rifle components look fine, I'd lean towards the Kreiger barrel. IMHO you are making too big a deal about reloading. My buddies and I chipped in and bought a $6 Lee loader in 1969 that produced loads that couldn't be touched by factory ammo. We just read the instructions. Sure you can shoot long range with factory match ammo, but it's not all that it's cracked up to be, it can be inconsistent. You also have to hope it shoots in your barrel. For LR(800-1000 yards) hunting, your bullet choice with factory loads will be limited to lower BC bullets.
"Let us speak courteously, deal fairly, and keep ourselves armed and ready"-T. Roosevelt