Those soft swaged 38HBWC would often give leading problems, some brands worse than others.
The bullets were cheap to purchase in bulk though and for a non-caster, it was the way to go to shoot in volume and in the Bullseye matches.
We simply used to re-lube them en-masse with a wax lube disolved in a little mineral spirits. Same thing as done a bit later with the LEE liquid Alox lube.
That little extra usually made the difference and they didn't lead when loaded at the target velocitys.
You still couldn't push them much harder than 3gr of BE or less would do or you'd be right back to the leading problem.

I loaded them backwards too,,I think most every reloader with a 38Sp did at one time 'just to see'.
They look dangerous if nothing else!
Never had any of them separate, ect.
No idea of vel or shock power,,just shot them into and at stuff.
I did get a squirrel with one. Using my pre-war 38HE 5". (Cost me $35 a the time in '67.)
It firmly planted the beast with one off-hand shot.
Field proven ammunition in my opinion.
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Who the hell knew what a chronograph was!