Fox Collectors

I know as a general rule we try to keep 12ga loads around 7000psi. Is this true for 20ga as well? I can't find any recipes with pressures that low. Most are around 10,000-11,000 even with powders like 7625 and pb.

What am I missing?

Have you seen this?

http://www.alliantpowder.com/reloaders/ ... 3&gauge=20

I figured there were powders I just hadn't looked at!

Thanks!