Im happy with it in all my DISC based guns.

In the 54 and 50 ignition is very good but the 45 seems massively improved. So much that sabots using 100gr of BH209 look as stressed as 110gr with the FPJ setup. The vent liner pocket is larger than the bore so something might be going on.....kinda like a bottle neck cartridge. Shoots great though.

Ive never tried any T7 powder in mine yet but its on the to do list. I want to see if the bore shine and the ME bore condition have made a difference. Its made cleaning up BH209 a little easier.