Steve my old bow,, is close to 60# at 28 inches,, it will shoot a 500 grain arrow about 170,, slow for its draw weight,,
but the 500 grain arrow doing 170 is ok for hunting,,and of course a 600 grain arrow is slower even,, but still hitting hunting speed for me,, so I guess my rule is if the arrow shoots hard enough to get the job done,, then the set would be acceptable for that application,,
in the last 20 years I have learned to make bows more effecient,, when I look at the bow Pope and Young shot, it seems they had to up the weight to make up for the string follow or set they had on the bows,, just thinking out loud,,