I picked up a 6" GP100 last year and have been shooting it a bit (first revolver, lean more toward Contenders and Encores). I put a red-dot on it and it grouped 3 of the Buffalo Barnes 140gn TAC-TX shots in 1.5" @ 25 yards (off a bench) last weekend. If I can get back to the range before deer season to zero the sights, I will carry it this season as primary or backup depending on where I am sitting. I have not had a chance to chrono the load, but BB suggests it should be north of 1500fps. The only problem is that they run ~ $1.50+ a shot. I would look carefully at the load specs as you can buy 140gn Barnes bullet factory loads with estimated velocities ranging from 1100 to 1500+ fps. Best of luck!