jc,
from slightly less than 700 fpe for the 10mm to slightly more than 1000 fpe for the .41 Magnum
Respectfully so, I don't know where you're getting your energy numbers from but the .41 Mag, a 1000fpe, it don't make my friend.
My .44 Mag makes between 1000 and 1100 FPE with good warm loads, but the average .41 Mag SAAMI loads make 750-800fpe....period.
Check your good ole Sierra Manual, or whatever you'd prefer.
If you're getting 1000fpe from a .41 Mag load, whatever weight bullet you're using, hopefully it's in a Ruger, or something good and stout.
And like I said, the 10mm had initial figures in the mid 600 fpe range.
Not to continue on with symantics, but regarding Elmer and the boys, they probably forgot (in their time) more than you or I will ever know.
Dick Metcalf as far as being knowledible, was at the tail end of that crew and was a newbie when they were all still kickin'.
So, dead or alive, their information hasn't changed much, and they made due with a lot less than any of us have today.
I've been reading their articles for an easy 35 yrs. and I'd surely bet
that their guesses were better than most people's facts.
Bob