I'm not a fan of the wad cutter in most self defense scenarios. I'm talking about the lightly loaded 38 special variety. I can see a few uses in unusual circumstances.
Early in my LE career, I worked along side old veterans that were around in the 70s. In Atlanta PD, a political decision was made to issue low velocity wad cutters to all the officers. I brought the topic up on several occasions, with several different officers and received a lengthy, profanity laced diatribe that was spectacular on every occasion.
The officers that used, or personally knew those that experienced these "Reggie Pellets" (nickname based on the public safety director) were not fans. At all. Anecdotal? Sure. It was still based off actual street results rather than a laboratory.
If you are comfortable with the round/load then have it. Personally, I believe that there are much better offerings that I would, and have, chosen.