This is a follow up question to my post yesterday seeking help identifying my newest acquisition, a Belgian SxS. See my post from yesterday for pictures. Anyway, this ol gal is chambered 12 Ga. - 65 mm. I had planned on using Magtech brass 2 1/2" cases or Federal paper hulls, but they are tight in the chamber -- I mean tight. The gun will close, but you have to dig the hulls out. I also tried some Winchester AA Featherlites, and they seemed fine. I used my Lilse bore hone on the chambers to polish them out and things are improved, but not the way I'd like it. I'm open to your suggestions.