I bought a custom rifle. It is trued Rem 700 Police SA, Krieger #17 @ 28", McMillan A-5 with adjustable cheek piece. The caliber is 6BR. I plan to use it as a switch-barrel rifle. 6BR + 284 Norma. Both have the same bolt face. I love 6BR and it shoots .107 and .138 inch at 200 yards with 4 shots each. Anyway, I thought about it and the action is a single-shot. I've seen the benchrest shooters took the bolt out and insert the cartridge into it and put the bolt back in and fired. Just asking you....is it "possible" to use 338 Lapua Magnum in short action (SA) as a single shot? Meaning that I will take out the bolt and insert it? Yes, I'll need to purchase the magnum bolt and switchable barrel.