You know, the Astrodome gun show is only good because it's so big and a lot of people show up. I actually hate the tables there, because the same vendors sell the same PIECES OF CRAP GUNS. It's funny. I've been going to every other one for about 3 years, and I see THE SAME PISTOLS from the same vendor. Usually it's some old gun from 1940 or 1950 that's in terrible condition and they are wanting to sell it for four times its value.
BUT, it's a great show because I buy firearms off of the people walking around. I just simply walk up to anyone carrying a pistol or rifle and say, "Excuse me, are you selling?" If so, I usually get nice pieces for decent prices...and no paperwork!!!
The guys at the tables are all the same (typical of gun shows)...they see you selling something and ask to look at it. Then, they "slam" your firearm and offer you 1/3 it's value. Meanwhile, they might be selling the same gun at their table for 5x their buying price. It's frustrating.
OH YEAH. At the center FAR BACK of the hall there is a company that has TONS of brass and lead in every caliber imaginable. Good prices for buying from them. The only negative is that they are so far in the back, you have to walk a mile with your newly-purchased 40lb. bag of lead. Take a luggage roller with you if you think you will buy lead.