Normally 50 cal round balls are 177 gr for .490. I wouldn't want to be hit with either a 50 cal or a 30-30, however, the two are so different that trying to compare them is apples and oranges. I prefer to load up the 50 round ball load to 90 gr of 3f. I shoot 100 gr of black horn in the in-lines for comparison. I do shoot 2f in the 54 cal at 110 gr.