338LM is just like any other beast. Takes good load work up, a good rig, and solid shooter. Shot a buddy's Desert Tech in 338LM and had a 3 shot group that may have measured .345" edge to edge.

He ran a March 5-50x scope on it and got just about the same ballistics with 6.5x47L and the 338LM, so his 100yds zero was nearly identical between the 2 barrels.