Is once fired 7.62 fgmm worth anything

Check the reloading PX and you will get an idea of pricing.

Some will say FGMM won't last.

I've loaded it at least twice with no issues.

The only problem with the 7.62 headstamp is it may be crimped primer. Confirm that, I'm not 100 percent certain on that.

Crimped primer introduces another step so it may not be as desirable as .308 FGMM.
 
I don't reload anymore, but when I did, my FGMM brass lasted through many loadings just fine. I also wasn't trying to break any land speed records, just good, slightly short of max loads.
 
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