I Like Leupold fixed power scopes. I use the FX-II in 4x32 and FX-III in 6x40. Both are lite weight and have very serviceable glass for legal light hunting in the woods. One of mine is a 1894 45 Colt, it wears the 4x. Stuffed with H110 and a 300g bullet I would think it very similar to your 44 mag. The 4x is plenty for any range those calibers are useable at.