7mm Rem. Mag. With a 26in. Barrel
160gr. Bullet (I use accubonds)
Don,t go cheap on glass- start at least with a 4.5x14x50mm with medium to high end scope. (I use leupolds for starters) use good scope mounts also
Add a muzzle brake if recoil is too much. I do not recommend because you MUST use hearing protection.
Probably will need to accurize the gun before it will shoot consistently past 300-500yds.
Take care of that barrel, keep it clean.
That's just one idea, very many out there. My 2 cents.