Selmer,
I'm afraid that I won't be of much help, but I have used the H414 in .243. I've yet to get this gun to shoot properly with any powder, so I can't tell if the H414 worked well or not. I can say, however that I was getting flattened and cratered primers at 44 grains, this with an 85gr Sierra HPBT, Win. cases, CCI 200 primers, and a 2.635 OAL. Of course this may be different with your gun, but it's what I experienced. I think that my initial load data came from the Lee loading book. I'm working on a few issues with the gun, and if I ever get it shooting well, I'll go back and try the H414 again.
MH