It seems we have come full circle, or, as one of the Utah Jazz basketball team once remarked, "We'll just do a 360, and get out of here!"
First, there were the round-nose boolits, which were relatively low-velocity, and called "widow-makers" by lawmen who carried them, even when "high velocity" loads were introduced. These were sometimes replaced by full wadcutter target ammunition, at about the same velocity, which were said to be more effective. They were replaced by hollow-point semiwadcutter ammo, that was said (with some justification) to be more effective and accurate at longer ranges. In the '40s, my Uncle, as a detective, (as a beat cop , he once had a gun battle with his reflection in a mirror, when he found a store door unlocked and open!) carried conical "armor piercing" ammo in his Colt snubby, that had clear plastic grips, inside of which he had a picture of his second,"trophy" wife, "Skippy". At 5, I was an observant little tad.
When I started loading in the '60s, there was +P 158gr LSWCHP " FBI/Dade County/RCMP" load, which was carried by those who probably didn't want to carry the new, high velocity "Blue Whistlers"... 125gr @ ~1,400 fps, which wrecked the forcing cones of many fine K frame Smiths. (We shoot best with what kicks us least, maybe?)
Now, we have .38 Special 158, 125 and 110 gr +P loads, which are said to be only a little less effective than full-snort Magnum loads, much easier to shoot accurately, and wonder of wonders, the old, all most forgotten Wadcutter Match loads @~ 7-800 fps have been rediscovered by scads of knowledgeable shooters as easily-handled self-defense loads! Even in the little teeny guns that have become so popular lately!
Now, there are plain square-based, and bevel-based wadcutters and round nose-flat point boolits.
What's a person to do? Does it all come down to the meplat? Used in a self-defense scenario, do bevel-based Wadcutters act like the round-nosed boolits of old, or does the flat area increase effectiveness? Are round-nose flat point boolits as effective as the "old technology" semiwadcutters, with the only real advantage faster speedloading for competititions?