Depending on the year or period in which the gun was made the shot size varied between 7 and 7 1/2 and the distance to the target board varied between twenty-five to forty yards. The pattern board used a 30" circle in some periods or a 24" long oval in another period. The Parker Story has some of this information and some hang tags have some information if somebody is lucky enough to have a hang tag for his gun. Some orders had specific patterning parameters so specified by the buyer of the gun. That's a tough one to try to nail down Robin.
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