Riceguy,
Sorry but I wouldn't consider living in CA anywhere to be lucky! And I was born in LA. I was just smart enough to get out! I now live in MO, out in the woods with my own 100 yard range in my back yard. At least you live in the better half of CA, even if you do have to put up with newsom & his ilk!
You're right about RCBS, they're customer service is right up there with Dillon and Leupold!
If you are seating bullets back into a case where a bullet has been pulled you should at least neck size it or yes, the bullet will be loose. It doesn't have to be fully neck sized, just down to where the base of the bullet will seat if it isn't below the neck.
On ammo that will be fired from a semi auto and should have a crimp, I use an old size die that has been cut down so it doesn't contact anything but the neck and then use it to taper crimp the round about a 1/8th inch down the case mouth. I've never had problems using this method when shooting .223 (AR's) or 308 Win (HK91). If it's a heavy recoiling round I crimp in the cannelure but unless your brass is trimmed carefully, this can be a real pain! I take care to trim my .338 brass to very close tolerances!
Cheers,
crkckr