Maybe not now, but Pro-Load used to market a Light Magnum load using the 200 gr HP/XTP bullet -- 1100FPS IIRC. The powder was supposedly optimized for shorter barrels. FWIWWW Silvertip was a kinda/sorta 3/4 44 Magnum load. Maybe it still is, dunno.
It didn't want to play nice in a Ruger 44 Deerslayer Carbine, so maybe it really was a less than Magnum load. I never clocked it.
Other than lead SWCs previously mentioned and Silvertips, I don't know of anyone advertising a reduced power 44 Magnum cartridge.
salty