There are pros and cons to using wadcutter ammo in a revolver.
Here's some ballistic testing on .38Special ammo:
We conducted ballistics gelatin tests for 38 self-defense revolver loads in 38 Special and 357 Magnum. Here are the full results along with photos and video
www.luckygunner.com
The testing is from LuckyGunner.com and there are other calibers tested if more research is desired.
There are limitations on ballistic testing, although I'm no ballistician or expert on the matter. LuckyGunner's rationale is explain somewhere on its website with more research. LuckyGunner is apparently using 10 feet as its standard test distance and using some type of clear gel. All this may vary from how the FBI may test, if that matters to anyone.
Some PROs which come to mind are:
-cost
-lower recoil
-faster shot intervals/splits
CONs might be:
-perhaps limitations as distance (but what distance?) lengthens on penetration, maybe accuracy
-perhaps harder to reload vs a conical round
-perhaps inadequate barrier penetration vs other ammo, like JHP
I haven't given my post too much thought and I've actually got to go shooting right now.
Please discuss further.