Great cartridge. You do need a full magnum lenght action to get the best out of it. Mine is built on a M17 with the mag box lenghtened. A mate has one built on a brno 602. You can seat the projectiles out and add a bit more powder.

I am still develping loads for mine. At the moment I am getting 2800fps with the 220 grain Woodlieghs, 3250fps with ACP 175grain pills. All have an overall lenght greater than 90mm.