Speer swaged HBWC's
I have shot thousands of them, competed in bullseye, PPC, etc. back in the 70's and this is what I shot by the thousands through my revolvers and Smith 52's. Loaded over Bullseye I could routinely cut a "rathole" into the X & 10 ring. As an instructor I supervised tens of thousands of them fired for training and qualifications. I also loaded them inverted for certain self defense loads for 2" guns as well. With that massive cavity forward, and the projectile being soft swaged lead, they opened up dramatically in "soft target medium".
This practice was not uncommon back then.
I have also hunted small game with them when loaded normally, they are probably the most accurate bullet for 38 special loads IMO.