I also buy Ballistic Products from Will Bilozir at the address above, he has been good to deal with. One tip: the Fiocchi hulls are crap. The BP "multi" hull is a bit better, Cheddites are OK too, but both are often only good for about 5 loadings. Remington black hulled Game loads are by most accounts the best hull available, but you must buy them factory loaded and shoot the shells to get some to reload. I just buy Remington 8's or 7-1/2's by the case and use them for sporting clays. Reloads are for hunting. The commonly available Remington wad of course fits the remingotn hull perfectly, but has a 1-1/8 oz shotcup, too much for most upland bird shooting with the 16 ga. IMHO.
There is a 16 Ga. society that you can look up on the net, and they have a good reloading "group" that you can join for a nominal fee and you'll get a lot of good data and tips.