Lots of choices, some people with certain guns have more problems with difficult ignition using # 11 caps than others also the brand of cap enters into it some times, black and pyrodex were what we normally shot before they came out with inlines the other subs are actually designed for inlines but a few of them work in side locks some people even use 777 I just dont need any chance of ignition difficulties when I have a deer in front of me.
When you are ready to do a bit of shopping try here
http://www.grafs.com/index.php
Graf and Sons is a good place to shop or window shop.
Lee