Marlin XLR 24" Ballard Deep Groove Bbl. This rifle is sighted in about 1" high at 100 yds with a 350gr GC ( BHN 10.5 ) bullet from my Saeco mold. Vel at 1500 fps using IMR-4198. Today shooting this rifle with a 422gr ( listed weight 405gr ) RCBS GC bullet from the same alloy, at 1500 fps,Attachment 287797 hit's center at 100yds about 1 1/2" high. This strikes me as odd.I would think these two bullets would shoot much father apart.Attachment 287802