I'd like to enter an unsolicited testimonial. While I've been a metallic cartridge reloader for 35+ yrs,I've only started reloading shotshells in the past 6 months and Ballistic Products, Inc. has become my #1 source of information and a reliable source of supplies, especially for odd shells and loads. I called them up looking for buckshot load information for a 2 1/2" chambered 16 gauge drilling. They were the epitome of helpful and were very good listeners.
Take a gander at their website, www.ballisticproducts.com