[quote=Chuck H I dunno about you guys, but all the guns I've patterned gave pretty much expected patterns for their respective constrictions.[/quote]

Me too, and I have spent a lot of time hanging around the patterning board behind a major after market choke tube shop for the last several years. So predictable, in fact, that the owner can predict with great reliability what size shot will give a certain pattern out of his chokes and any commonly made gun.

May God bless America and those who defend her.