STiTkacit--You don't buy it.In fact none of my creations
can be bought ready to go.We make them.
The 2 bore case we make from 27mm Nato Typhoon
aircraft cannon shells.It is steel, and our case
is 5 inches long, anda 1.225 inch bore.and that matches
surplus 30mm muzzle sections with rifling reamed out.
We will ream out rifling because it is too tall and
to fast of twist.Run it as smoothbore, use about
15 50cal lead balls for ultimate shot load.
Or a hollowbase cast bullet...Easy to work on and
convert case on the lathe.No more pressures than it will
need to get 20-25,000 ft lbs the case will never need
resizing on the bottom 2/3.Here ispic of case with
barrel and a mock up pivot block on barrel.In pic
is 4 bore case and 458Win for comparison.Ed.