I have a new Armi Sport Spencer Carbine and was wondering if other AS owners have measured the cam height? I think I have a combination of a magazine spring being too strong, coupled with a cam that is too high, which forces the nose of a blank cartridge too high. I can load 3 or 4 and it works okay, but greater than 4 creates a jam. My original carbine's cam is .122 or so at it's highest point. I need to take this one out and measure it precisely, but I think it is about .142.
Anyone have any pointers on how to adjust the spring tension in the magazine and what the cam height should be?