Hello lanchaster,

My photos show a chamber cast with dimensions. The 20ga factory shell and the Magtech 20ga brass shell are both a perfect "slip-fit" into the chambers, and the rim dia is also perfect. Would you know the bullet weight and velocity of the No.3 cartridge? Also, what is the meaning of the 24 that is engraved as the caliber. It is engraved "Cal. 3 24"

I have sent you a PM.