Even the JHP loads by Rem and Win are loaded quite mild. Might be adequate for deer out of a rifle or carbine if kept to under 100yds.
The 44/40 WCF is not an easy round to reload either. The case necks are quite thin and crush easily. Also , most guns require a .425-.427 dia bullet. Jacketed .430 bullets intended for a .44 magnum can cause high pressure.
Measure your throats - check your chambers - slug the bore , for best results.