I've seen some good deals on "once-fired" military 7.62x51 brass but they all say that the brass has crimped primers.

What are "crimped" primers?

What purpose does crimping the primers serve - other than pissing away more taxpayer dollars?

How does one go about removing a crimped primer?

Things I have read about crimped primers mention swaging the brass. What does swaging mean in this context?

Have you read the front pages of your reloading manual(s)? I believe a primer pocket uniformer will get you ready.

After decapping we used to take a sharp pen
knive and hold it against the crimp while rolling the case across a table. Works faster than you can tell about it.

I have used a primer pocket uniformer to remove the crimp but, what I think works best, is the RCBS primer pocket swager.

The military ammo has crimped primers to keep them from getting into the action & to help water prooof the round is my guess. Remove with a reamer or swager. Swaging mean the primer pocket is reformed under pressure using the tool. There are 2 types of crimps.

the few i have ran into will priming cases i have just hit them with a case mouth chamfer tool. 1 or 2 spins and your ready to prime.

Thanks all.