Masterblaster1: failing any other replies I would suggest not downloading them at all. I've used and loaded mil-surp 9mms for years and the only 'downloading' I have conducted is to separate cases by manufacturer so I can get consistent bullet seating and crimping for 50 or 100 rounds or so. It's a beast trying that with mixed brass.
The WCC is Winchester Cartridge Company and the FC is Federal Cartridge and I'm not so sure they use thicker brass for their mil-spec loads; maybe they do, maybe not. That brass sure does not compare to Canadian mil-spec brass for being thick....
Mil-spec ammo is not made for reloaders. It is made to be shot and the empties left on the battlefield floor - you will find mil-spec brass picked up at military ranges and police ranges but usually by the agencies that trained with it ( you may now assume the paper-pickin' position and retrieve your brass).
When it comes to 9mm stuff, as mentioned, I try to sort by manufacturer and that's about the best I can do when it comes to prepping the stuff for reloading.
You may also need a primer pocket swager to open up the primer pockets for re-priming. HTH.