I have a major preference for IMR's 4895, over Hodgdon's...
at the same time, using load data for a number of reloading sources...I don't think you are going to see that much difference, to where it really matters, which ever one of the two you pick...
IMRs old Brown Sheet had load data using each one of their rifle powders...Lyman's Old # 47 Manual also lists many of those powders in that burn rate, to include the 300 Magnums...
so that stuff is out there and fairly easy to find...
IMR's Brown Sheet, lists 64 grains of IMR 4895 for an MV of 3240 fps...for a 150 grain bullet
for a 180 they list 59.5 grains of IMR 4895 for an MV of 2950 fps
for a 220 grain bullet, they list a max charge at 53.5 grains, for an MV of 2555 fps...
If ya use H 4895 instead, just start a little lower and work up just to be safe.. but the results should be awfully close.. and these are max loads... so less powder, less recoil, etc...
