Quote History Originally Posted By Mach:
I just use shot brass and leave the used primer in it
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This.
I had a friend make up some X39 dummy rounds for me. He soaked the rounds in WD40 to kill the primers, then drilled into the casing and got all the powder out.
When I got them from him, I soaked them longer in WD40 bath, then went through them with my nastiest AK clicking off each one. Had a few small "PFF" from a couple primers but nothing serious.
Every single one of them has been useful and has been used dozens of times now- never an issue with not fitting or having bullet fall out, etc. Cannot say that for every other commercial option I've bought over the years.
These are great for mixing in with live rounds to induce jams during training. Have a friend load your mag so you can't game it.
We found some 5.56 ones on Ebay and used them at a dry work class we do with a combatives group. They worked a little TOO well, LOL. Induced some rounds stuck in chamber and bolt overrides. Being as most of the dud rounds will just induce FTF and nothing more, we will mix in these with others to induce more serious malfunctions.