I would like to try Ramshot Magnum w/ 180 and 200 grain bullets.Does anyone have any good loads that have worked for them.

I haven't used the Ramshot Magnum powder. All my 300 Weatherby loads were worked up before it was made. But after trying most of the slow powders with the 200 Gr Sierra Game King IMR 7828 had them all beat hands down for accuracy and velocity.

180's:
Magnum From 78.9 grains to 88.0 grains
Federal 215 Primer

but I preferred:
MRP From 77.0 grains to 84.0 grains
Federal 215 Primer


200's:
IMR-7828 From 73.0 grains to 83.0 grains
Federal 215 Primer