I think Miller refers to "cu in" as in cubic inch. Think CID if you're a pre-litre type of guy.

Thanks for the info, folks. I tried some Feltan/Bluestreaks and Federal cushion wads from my windfall in a 12 gauge hull. They definitely are not interested in passing the crimp area of a fired hull. Have card wads in 1/16 and 1/8" thickness by now discover only in 16 and 20 gauge so I'll have to look at the suggested sites and Ballistic Products catolog and work out what I need.

jack