I went out to shoot today in honor of our founding fathers who took up arms to fight the oppression of tyranny. With no oppressors to target I shot a few rounds through the chronograph. I had a box of Federal hunting loads for the 41 Mag. These are labeled cast core and of course are what we call hard cast, specifically Cast Performance 250 grain WFNGC bullets. The label on the box claims a velocity of 1250 fps. I shot these through a 4" S&W model 58, a 4 5/8" Ruger Blackhawk and a 6 1/2" Ruger Blackhawk.
I also pulled one of these and found what I believe is H110 at about 17 grains charge weight.
S&W 4"------1109 fps ES 72 fps
Rug 4 5/8" --1152 fps ES 109 fps
Rug 6 1/2" --1269 fps ES 20 fps.
I guess the H110 likes more barrel length to deliver, Hmmmmmm........
I can duplicate this load with clean burning N110 with ES numbers of less than 20 even in the short barrel.