The 416 Rigby is a great round. How about using two different scopes in QR mounts? I had mine with a 1x4 Leupold and 410 Woodleighs (soft & solid) on at 100 yards, then a 2.5x8 sighted in with Speer 350 Mag Tips at 225 yards. About 250+ yards was all the farther I felt comfortable shooting with the Rigby. I imagine it could be shot farther with practice. It just wasn't something I wanted to put a lot of rounds through, however.