superdude

Tests show that the recoil force is different with different bullet weights when using the same gunpowder. Heavier bullets produce slightly less recoil. https://www.shootingtimes.com/editorial/power-factor-recoil-bullet-weight-gives-edge/99399

That's not quite accurate. The only traditional semi-rimmed 38 Super case in that table is the Remington. Other brands make semi-rimmed cases, but are not listed there. All the others in the table are specifically noted as rimless super comp and clones. It's from the article I posted the link to, which describes the known rimless Super Comp and TJ cases made at the time. Other semi-rimmed brands are not in the table because the article focuses on the rimless variants. Most of those same brands also make semi-rimmed 38 cases. Right? Starline has two semi-rimmed 38 Super cases in addition to their Super Comp and TJ lines.

Some readers might find the article below of interest. https://www.ssusa.org/content/rimless-38-super-brass-everything-you-need-to-know/

Why?

Maybe some useful information here: https://www.shootingtimes.com/editorial/fast-9mm-loads/388612

I broke a firing pin on a S&W 686 with a hammer mounted firing pin while dry firing. It does happen.

Published load data with pressure testing will tell you if your load exceeds standard pressure - or not. Consult loading manuals for that information.

Maybe something useful here: https://www.ssusa.org/content/handloading-the-38-short-colt-for-competition/

Maybe some useful information here: https://americanhandgunner.com/gear/handloading-lead-free-frangible-bullets-for-pistols/

Maybe something useful here: https://www.ssusa.org/content/handloading-the-38-short-colt-for-competition/

Which ones?

The lube is most likely the source of the smoke. If you like wadcutters (or any lead bullets) but don't like the smoke, switch to Hi-Tek coated bullets.

You'll have to slug it to know. Never assume. Always measure. 9mm, 38 Super, and 38/357 all have the same SAAMI barrel specs. .355 groove diameter +.004. Anything within that range is in spec. https://saami.org/wp-content/uploads/2023/02/SAAMI-Z299.3-2022-Centerfire-Pistol-Revolver-Approved-12-13-2022.pdf

In case anyone is interested, the article below discusses this topic and provides evidence showing that a heavier bullet has less recoil than lighter ones when loaded to the same power factor with the same powder. https://www.shootingtimes.com/editorial/power-factor-recoil-bullet-weight-gives-edge/99399

Online calculators are here: http://kwk.us/recoil.html https://www.jbmballistics.com/cgi-bin/jbmrecoil-5.1.cgi