Good catch, 2-p; I was thinking drams and typed DE. Thanks.

RH, yes, for practical purposes you can assume that all else equal, an increase in shot load will produce an increase in pressure. A 1 1/8 oz proof would indicate a 2 1/2" shell, 1 1/4 oz would be 2 3/4", and 1 1/2 oz would be 3"; the stated shot load was typically the maximum load for the stated hull length.