John.....There is a growing interest in modern 12 and 20 bore guns. My friend, Dr. Charlie Sharps has just had articles in "the Single Shot Exchange" and TC's "One Good Shot". He is shooting both BP and smokeless.
My company, Dixie Slugs, has just bought another mold.....20 bore Wesley Richards. Although our major products comprise of loaded ammo for modern firearms with rifled barrels.....all is a takeoff of the original paradox type bullet/slugs. We do have a line of slug/bullets for 12 bore and now 20 bore, with another 20 bore mold in two months.
Now for a data base.......First, there is no relationship in powder charges between shot and a single slug. When a shot load is fired, the shot load expands against the sidewalls......much like a "plug" effect.....where the slug/bullet reacts like a "piston"
So.....I would not trust any smokeless powder load to be put into a data base unless it had been tested in a pressure gun! All out loads have been tested at $5.00 a shot with a min of 5 shots for record.
Of course this only applies to smokeless, as there are ample records for BP.....James@Dixie Slugs
