I’ll be honest, I’ve screwed up a lot of things in my life time but never a die. Shooting as much pistol brass as I have I never tumbled unless I found range pickups but my brass never for a pistol. Say what you want but it worked for 10 years and no die damage yet. Now here’s where I got smart. Needed a die and my dad had the caliber, ask to borrow it and first shell I ran up it bam!!!! Scratch. Next case scratch next one and next one scratch. Now I’m of the school I’m just going to tumble everything even if it’s just for 1/2 hour to knock off the hard stuff just a bit. Figure I can tumble when I get home from work and shut her down when I put the kids to bed. That’s pretty much what I do for my rifle work and should be sufficent for this. I just see a future problem here.