Well we are going to use expanded Lee slugs in the short
brass to have powder room to get the speed the
short brass guys want. That is why I like long cases
as you have more choices like the US-S, regular
sabots, as wel las Lee and Dixie. etc.

In the early days; in my Greener's book he states that
gun with a rifled choke section of the barrel, called
12ga paradox shotgun/rifles, with slugs, heavier powder
charges than shot loads, could hold what amounted to
about 5 inch pattern at 100 yds.

And still had 1800 ft lbs energy at 100yds.
And that is with guns with lighter, weaker barrels
than we have today, so our work is a good extension
of what the early big bore guys did.

And then the 4bore for guys liking a big challenge, 3rd picture...Ed