Anybody have any input on AA XMP 5744 in the .458 Win. Mag.? I am currently enjoying great results with the Lee 500 grain gas checked bullet and 26 grains of 2400 -no filler- out of a Ruger No. 1H Tropical. I am getting about 1350 FPS (more or less) and can pretty much put them all into one large (1"- 1 1/4") ragged hole at 50 yards. It is a fun load but I am wondering if the 5744 might be better as it seems to be designed specifically for reduced loads. Comments are welcome.