Have used Magnum in quite a few cartridges with excellent results, including the .240 Weatherby, .257 Roberts with 120-grain bullets, .25-06 (again with 120s), .257 Weatherby with 100-120 grainers, 6.5x55 with 140s, .264 Winchester with 120-140s, .270 Weatherby, various 7mms with heavier bullets from the .280 AI on up, .300 Winchester and Weatherby Magnums with 200s. It also worked great with 400-410 grain bullets in my .416 Rigby.