I was talking to Dan Banting of Kent Cartridge Canada yesterday. Among other things, he sent this in a follow-up e-mail, which may be of interest:

"Model 2 3/4" 1 1/4oz. Tungsten Matrix, Velocity 1370 FPS, Pressure 9,047 PSI

"Model 3 1/2" 2oz. Tungsten Matrix, Velocity 1260 FPS, Pressure 13,000 PSI

"In addition you might have an interest in an item that we produce that is not a catalogued item. We have it made by our sister company Gamebore in the UK. The model code is G1225NTF 30 it is available in #5 and #6 Tungsten Matrix. It is a 2 1/2" paper case fibre wad 1 1/16th oz loading. The velocity is 1185 FPS and the pressure is a modest 7560 PSI."

I'm using the 12ga 2 1/2-inch 1 1/16 No. 5 paper load.