Halfa double; yes you are of course correct.
I did a mistake. Seems like I never will get the imperial calibers right the first time... I did a wax cast of the chamber, and the measures I get correspondes very close to the 500/450 #1express. The book I used when looking up, is "The handloader's Manual of Cartridge Conversions"

[img]https://pin.it/1y66ajo[/img]

[img]https://pin.it/732KOyq[/img]

[img]https://pin.it/1WeWGeq[/img]

[img]https://pin.it/23rWcfi[/img]

Last edited by Skrotnissen; 02/21/22 05:34 PM. Reason: Trying to add photos