All I can say is that I have a Scandium alloy framed Governor and like most of their lightweights, S&W cautions about testing the ammo for slug separation before continued use of that ammo. I tried several different kinds from Super X, to Hornady, and the 185 grain didn’t separate at all. Some of the ones I tried were factory crimped and it didn’t matter.
If you really want to try and separate slugs from cases, try some old 45 ACP made during WWII. That stuff is TIGHT! Some of it (Remington) was sealed with some sort of glue that forced me to go down a size in the collet puller of my Leeman to get them out. Ended up completely deforming the slugs. I even wrote a paper/article about Dewating this old WWII ammo.
I don’t think I’ve shot a factory load out of my handguns in over 30 years so I can’t say what a factory crimp looks like.
If you’ve got some factory ammo with cast bullets, if you have the means to do it, you might try reseating with a slightly heavier crimp to see how it works.
A couple of thousandths deeper wont make a difference.
Cowboy loads would probably be a lot cheaper and easier to get to practice with than jacket loads, if they work.