Well that's a good point I'm shooting heavy Douglas fir arrows 560 grain out of the osage and it's clocking 172fps consistently the R/D I just got the arrows dialed in and there probably 480 ish grained I will weight latter and I haven't clocked the R/D yet but running a heavy 14 strand D97 string on it and a 10 strand FF plus on the osage but my best guess is the R/D is besting the osage by at least 20 fps but on the longer shots the horizontal accuracy was off to ,so for me it's easier to be more accurate with the rest, with the knuckle all the stars have to line up but I'm only talking the way I shoot !