I have .38 Spl headstamps from known WW II .38 Spl. loads, original Super Vel, Peters, S&W, WCC (military), Speer, PMC, etc. The .38 cases will last for ages, especially if you get a couple of coffee cans full and rotate them between loadings.
I’m more likely to lose a case if one slips oddly from the feed tube and gets the case mouth scrunched on the edge of the decapping die than to have a case split from use.
.357 lasts for a bit fewer loading cycles If they’re loaded up with my H-110 magnum loadings. My 158 gr coated LSWC over 6.6 gr unique are very accurate, don’t push the cases too much, but more importantly don’t lead up (or beat up) my .357 mag revolvers or Rossi 92 16” rifle.
Unlike a .30-30 or a .303 cartridge case fired in their traditional rifles that can stretch a lot with every shot, you’ll be amazed at how much these two cartridge cases stay in shape and keep coming back for more.
Stay safe.