Well I loaded the 500 gr bullets with an accurate powder and shot a couple 400gr & 500gr bullets thru my conagraph
The 400 did 1620 fps, 1613 fps and the 500 did 1419 fps.
Not to bad huh? It felt like the 500 had less recoil then the 400s. Hornady is selling loaded 500 gr bullets for a very high price. They go 1425 fps about the same as my loaded ones.