Interesting reading here:LOL...However I am still a little confused..IF one has an ovalbored gun, if the principle that the ball shall fill out the intire diameter of the bore, or shall/must there be just a little space( two sides) where the ball do not touch the barrel walls?. The reason I ask is because my Ball & Shot gun has the oval bore, and factory ammo(H&H) just barely touch two sides of the barrel walls leaving two long gaps open the look like two slim crecent "moons" on the sides of the ball telling clearly the barrel is very oval. My guess is that the tightest dia is some .734" and the widest point is some.742" or more. Then later it chokes down to .734/722 before the muzzle. H&H factory ammo do not work, and I wondered if I should cast the balls a full .742" in soft lead so it leaves no gap in the barrels?.