Brothers... if you have your Bibles, ( Lyman Black Powder Handbook, 13th printing), you'll see the ballistics for most CNB revolvers.
The 31 Cal, using a 50gr RB, tops out at 795 FPS, for 70 ft/lbs of energy.
I'm guessing close to a 22 LR revolver.
The 36 Cal, using a 81gr RB, tops out at 1097 FPS, for 216 ft/lbs of energy.
Using the 150gr Conical, the top FPS is 787 fps, for 206 ft/lbs of energy.
Using a RB in the 36 is similar, energy wise, to a hot (Ken Waters) load for the 32 S&W Long. The Conical is indeed similar to the 38 S&W.
The 44 Cal, using a 138gr RB, reaches 1032 FPS and delivers 326 ft/lbs of energy.
The Conical, weighing 155grs, reaches 885 FPS, and produces 269 ft/lbs of energy.
Both loads are very similar to duty loads for 38 special, but with more frontal area.
They were fantastic weapons in their day, but like the Model T Ford, there are better options today.