I suppose they are expensive if you just look at when I started loading they were under 11 bucks per 1000, now I am paying 45 bucks, when I can find them. I would never ever reuse a unfired deprimed primer. I have tossed some over the years and never thought for a second about trying them again. I want everything perfect. I am not about to have a hang fire or dud when I see finally see that buck or bull. Or worse if my life might be at risk. I also never touch a primer, the end, sides, or inside period. If I need to then, it goes away with used ones.
I had not one but maybe 4 to 6 people that I sold reloading parts too and gave them advice to get started that over 8 years came back to the store complaining about duds. Going over their ammo making they admitted they dropped the primers, picked them up or somehow else handled them with bare hands(fingers). Others crushed them when seating, that's a different story.
Tell me how wrong my thinking about this is. A primer works by the firing pin strike that causes several internal parts of it to be crushed to make spark. Now you push a deprimeing pin though it with force against the primer anvil to remove it. Is it still going to work as normal? Maybe maybe not.
