Ok, you have some more info & have opened up your ideas a bit.
May I suggest you look at the Ruger Match Target GP-100?
It, in my eyes is a bit better than the "regular" production GP-100's. I own a few of the older "Security-Six" guns,,, (5 of them,) and they are all quite nice. I never felt the "need" to add a GP-100. Well, I made the mistake of handling the Match Champion version. The wood grips FIT my hands quite well, and I had to have one. It caused me to buy a second GP-100 with a 6" bbl, and I added the MC grips to it as well. But the MC shoots extremely well. Enough to where it's a back up revolver now for Competition. (I won't cut the cylinder for moon clips or it's be my primary competition revolver.)
As for the 41 mag,,, I own several in the SA design by Ruger. If you reload,,, it's NOT a problem to have enough ammo.