I've been having fun shooting 6.5 grs of Red Dot behind a cast 200gr RNFP in my 4" 629. That is my current favorite plinking load. My supply of RedDot is left over from the 1990's. In the past I have shot 7.5 grs of RedDot and a Speer swaged 240 gr bullet without any problems. Data for RedDot in a 44 mag does vary I agree and the loads I shot were from my loading log book entries in the 90's. The source escapes me but was probably from an older Alliant booklet. These are my plinking/target loads.

In my 6 1/2" 629 I shoot 23.5 grs H110 and a 240XTP for a deer hunting load. If memory serves me it is danderous to shoot a reduced load of H110 in a 44 mag. so I definately would steer clear of H110 for a target load. A dozen or so of these H110 loads are all I care to shoot in one range trip.