My wife and I used full wadcutters in our 38's for the longest time.

Until I ran out of bullets.

Then I started casting the 140gr SWC because it was easier to load for her and any guests we have coming over to shoot.

Notwithstanding the discussions about using reloaded ammo for SD, I have these loads in my M38 and her M36, and in the speed strips & loaders we have.

The videos provided by MS stress recoil and shot placement, and for the wife and I, the loads I have running are the easiest for both of us to put on target, so that's what I run.

The videos have SWC in HP's, so I don't know what my 140's would test to by comparison, but using backyard ballistics, I don't feel they are deficient for penetration.