Those ballistics read like those for modern, downloaded 44-40 loads in rifle. I have no doubt those ballistics can be obtained with handloads in revolvers that can handle chamber pressures somewhat greater than SAAMI for 44-40.

FYI, Lyman 47 lists some 44-40 loads up to 20.000 psi with 200 grain Speer 0,429 jacketed bullets. These closely approximate the true HV loads once produced by factories for use ONLY in strong 44-40 rifles, like Winchester M92, Marlin M94, Winchester Low Wall, etc. In a modern revolver (NOT Colt SAAs, old S&W, etc.) that can handle this pressure, you should expect well over 1100 fps and plenty of muzzle blast and recoil -- I know, I tried some in my Ruger Vaquero.

Niklas