Wondering if anyone has tried the Hornady FPB in their White rifles?

I don't own a White. I've only shot them in a Genesis. They shoot pretty well so far. Haven't messed around much with charges or powders, only tried 100 gr Pyrodex RS. I recall reading something on the Hornady website about the bullet being designed to load easily and shoot well for a variety of "50 cal" bore sizes.

They work well in my .504 Ultramag. 100 to 110 grains of 777 3F gives a nice group with around 1680 fps for velocity. The skirt of the FPB's is around .505 to .506 so they stay put in the bore.

I wasn't able to get them to shoot very well out of my Endeavor. But I think I might be doing something wrong...