if anything, aim a tad low. Dead on should be fine. I have the same gun and using it for the first time this year. Just wondering what slugs your having good luck with. Hornady SST's and Remington Accu-tips don't group worth a damn out of my gun. Too high of velocities I presume. tried Remington Copper Solids 2 3\4" 1oz sabots at 1450 and they seem to do the trick. Cloverleaf group at 75 yards, was very impressed