I very much doubt this the above was the cause , I think what we have here is maybe a mistake regarding the original story, I,m thinking it may of been commercial ammo first then the handloads, I would think he went over the required charge, this could or may have give the stated affects.... and maybe the wet feeling in ones pants.
Regarding my own downloads, the proof is in the pudding they say, click on the link below have a look at the target in the pic,
L42 repro at the range