I've found 6.5 grains of RedDot or 7 grains of W231/HP-38 with a plated Xtreme 240 gr to be pretty mild. Can't remember what the starting loads are, so maybe lower is OK.
They sell a 200 grain, too, but in my experience, loading the same bullet to lower velocity gives a WAY smaller change in POI than loading a lighter bullet. I'm not interested in adjusting my sights often, so I'd only drop the bullet weight if I needed to dedicate that gun to ultra-powderpuff use for a long while. If you want to go that way and use your existing powder, Hodgdon shows 4.5 grains of TiteGroup as the .44 Special starting charge giving 850 fps for a 200 grain lead bullet. You could go up a to 5 grains if you are nervous about too little oomph, but I would shoot those in .44 Mag brass. The 200 RNFP has rather small bearing surface, and the plated bullets are pretty soft, so I'm guessing the lead data is OK.
Xtreme shipped fast on my orders, so I'll bet you could have these loaded up by Wednesday!