My Lancaster 12 ga. Colindian has the celebrated smooth oval bore rifling, with measured bores, both barrels, @ .736/.716, or .020" out of round, or comparable depth of rifling. In DGJ article by Ross Seyfried, he found his Colindian to have bores of .723/.709, or .014" out of round. Colindians use 750 grain elongated conical bullets; mine shows nitro proof marks with 28 grains Cordite/ 1 1/8 oz shot or 750 gr. bullet. Seyfried said in article, that he used "full paradox diameter, which is .735"--.736". Ratio of 1:15 alloy for bullet. Should I use bullet of paradox diameter, or somewhat smaller, considering size of my bores, .736/.716?