If you want to reduce felt recoil, your best bet is a lighter charge of a faster powder.

I would suspect that, out of a full-sized steel-framed .41 Magnum, you could easily come up with a load that had less felt recoil than a polymer-framed Glock. Far less, in fact, between loading hot enough to cycle the Glock, and then the weight of the slide banging around, versus the immobile mass of the .41.

Edit: I'd also suggest that a standard-weight lead bullet is likely to be more comfortable than an underweight one, if you stick to Starting Load data as your minimum.