I do not have one. I prefer the larger K frame, not the smaller J frame. The K frame fits my hands better, and holds 6 shots standard in .38 or .357. The J frame holds 5 shots max for the .38 or .357.
One of the purposes, however, of the .32 Magnum was to increase capacity in the J frame from 5 to 6 shots. This is actually old news... J frames have been made in 6 shot capacity .32 caliber for a long time. In fact, the predecessor of the J frame, the I frame, was originally made in .32 with 6 shots. Chambering for 5 shots of .38 came later.
The other part of the concept was to give as much as possible .357 velocities without the blast, flash and recoil of the latter. It actually exceeds 357 velocities from 2" and 3" barrels, but the flip side is the bullet is much lighter, typically 115 grains, while the .357 is running 125 to 158 grains.
A more fair comparison is that the .32 Magnum is that it duplicates the 9mm in a short barrel. The 9mm is well suited for small barrels, but in a J frame they are 5 shot, and require a star clip because they are rimless. Because the 32 Magnum has a rim, it is much more suitable for a revolver.
If you subscribe to the "bigger holes are better" or the "more lead means more dead" theories, then the .32 fails in that respect.
Actual shootings? I have no information there. The previous .32 cartridges have always been on the wimpy side, and weren't very good for "stopping power". Basically whatever can be said of the 9mm from a short barrel will likely apply to the .32 Magnum. I know comparisons have been made to the .357, but given the weight difference of the bullets I think that's overly optimistic.
Well, I got to shoot my new S&W 632 a little today with the following results/commnets:
(1) The .327 Fed Mag 100gr JSP American Eagle cartridges had more recoil than I prefer and the cases wanted to stick a bit.
(2) Some .32 H&R Mag reloads I had with 100 gr SWC cast bullets were much more comfortable.
(3) Some 100 gr PMC .32 S&W Long's with LWC bullets shot the best as to grouping.
All in all I think I will like the gun and the above seemed to group adequately at approximately 15 yards.
For carry purposes I will probably use some Federal .32 H&R Mag's with 85gr JHP's.