Ive had best luck calling them and placing my order. Last time I called they were able to tell me when they were scheduled to load certain shells next and wrote down my information and what I wanted. Couple weeks later they called me up to take card information and shipped them out. I will say the shipping estimates online were far higher than what was actually billed and they acknowledged that as well.

Just keep in mind that with shipping its better to order whole cases for economy of scale. Its almost as much shipping for 12 boxes as it is 24.