I shoot mild 148 gr. dead lead wadcuters in my old .38 specials. There is really no need to drive 'em to warp 9 anyway, and especially in an older gun.
Keep the high power loads for the newer ones.
I imagine we have all hot-loaded rounds at one time or another. I soon came to the conclusion that there was no point in it.
We all make mistakes....The key is to learn and not repeat the error, however slight.
Before I had things figured out, I once hot-loaded some 110 JHP for one of my 6' Pythons. There was way too much commotion, the rounds were difficult to handle easily, and the accuracy was seriously degraded. Then I learned about light bullets going way too fast in revolvers. I just won't do it again. I didn't damage anything, but I was kind of an ill advised effort.
If you want hotter rounds, bigger bangs, and a huge muzzle flash, get a bigger gun. It will do everything better, and the old hardware will be spared.