Re: military brass/primer question
So long as they're US military or otherwise Boxer primed, they decap normally, just like any other case. There'll be a bit more resistance due to the crimp, but it's not much. Use a universal decapping die like the Lee or Redding, and they will come out just fine.
The crimp will have to be dealt with before you reload this brass, though. I like the Dillon Super Swage best, as far as tools go. It's fast, and does a great job. RCBS also makes swaging dies to do this. Cheaper, but a bit of a pain to use and doesn't do as nice a job as the Dillon unit does. They can also be reamed out, and several firms make tools to do this; Lyman, Forster and a couple others as well. Cheaper still, but slow and I've never seen one that did as good a job as the swaging units.
Take your pick which method you use, but you do have to do it the first time through. It's a one-time deal, and after it's been done to a case, it's good to go from that point on.