James, your bullets shot very well in my .475 L, but never had a chance to try them on game. I've been hooked on 275 gr. .475 Xs. They worked well on groundhogs, deer, one Cape buff.
Sixshot (Dick) just gave me some 385 gr. cast HPs. They shoot fantastic in my FA- same point of aim as 275X, 400 Speers at 25,50, 100. Did a 1 1/2" group at 50. Did one shot at 100-dead center on a 3" dot. All of this is using a UltraDot & 12 gr. of Unique!!