If a 570 gr. bullet has a SD of .335, what does a 600gr. bullet have? Sectional density varies only with diameter and weight. lenth or composition have nothing to do with that number.
: At over 4,000fpe with a 600gr. bullet,(not my choice) as I would prefer a 550gr. at 1,900fps, again, over 4,000fpe, but a SD of around 325, I suppose, to a 500gr.SD perhasp .300? at around 2,000fps, again, well over 4,000fpe. the 500gr. would have roughly the same SD as a 300gr. .375, which seems to work OK as long as the bullet is up to the task.
: Of a proper construction, a 500gr. .50 would have much more actual impact and killing power within normal heavy game killing ranges than any .375 load. YOu just can't compare a descent .50 with a small bore rifle, and compared, the .375 is small.