I have loaded my first ever round for the mag. I bought both Rem and Fed mag primers and H4831sc, bullets are 140 gr SGK. I am loading my first 20, 50% with each primer. What primers do you experienced re-loaders use? I am very satisfied with my loads for my 204, 223's, 243, 308 but the Rem Mag seems like a different kettle of fish. As far as the powder goes, Hodgdon list 64gr as max, the Lyman manual 67.5. Quite a difference there, I see from Daniels 150gr bullet loads that he uses 64 & 64.5gr loads. These are way above the Hodgdon maximum. I ask these questions as 64gr of H4831sc, seems lost and lonely in the big old Mag case, shake a round and it sounds like a half empty salt shaker. I would appreciate any info as no-one I know, reloads this caliber. Rifle is a Savage 110 and the quarry will be Southern whitetails and hogs.