Sorry, hit the wrong key...

Centre to centre: 0.655", and the table is 1.25" wide but 2.05" long, to suit the 2.25" cartridge.

I would recommend everyone to have a .32-20. They are great fun to shoot, very accurate with nitro or black powder, and the Starline cases are thicker than, say, Remington and so last better. I use nickel Remington cases for BP loads: easy to tell the difference and easier to clean. They also regulate perfectly.

I have loaded this round up to a genuine 1900 fps but then my rifle does not regulate.

Good luck with the project!

HB