My comment of 77 grains of H4198 for a 404 SH at ~2550 was due to some experience with the original 400 X-Bullet over 78 grains of the same powder at 2590 fps (corrected to MV) from the 24" barrel of the Ruger No.1.
I'm not recommending it, but IF I were going "North" again for a bull moose, that might be my load. I'd have no qualms in using it. The COL was 3.65". The 404 has a BT so would be seated a bit deeper, but since I've none at hand, I don't know where the first groove would be, Soooo, I'd estimate 77 max for the 404. But would make any compromises essential to safety and accuracy within reason. I still have a bunch of those "longed for" 400 Xs.
The 404 being the best replacement - thanks to your good work... as always!
