yeah found that interesting....i know he has lots of experiance but know other guys that have also BTDT that say there is definitely a difference,in cape buffalo atleast, between the lower 40's like the 416 Rigby and the 470 and it could definitely be noticed...and definitely also a difference between the 9.3/375 and 458......less so between the 458's and 470 though which isnt surprising since is generally just stepping up in diameter but not weight so i would expect lil difference between the two throwing slugs at similar velocities....
as always i enjoyed Mr. Shoemaker's articles aswell
if you want to read more of Ganyana's stuff since he is more widely published in African magazines than US:
he has articles for free on here:
http://www.shakariconnection.com/index.htmli picked this book up for a couple bucks off ebay:
https://www.createspace.com/4421667
