i have both of them. my 357mg load with 158gr xtp hp with lit gun powder shoots about 1 1/2 inc higher at 200 yards then a 150 gr speer hot core with varget powder in my 3030 when sighed in at 100yards. with both a round 2250/2275 fps with my guns. 3030 marlin made in the 50s to my marlin 357 made in 90s