I have a 2 3/4" chambered 870 Wingmaster 30" FC barrel.If I install a new steel proofed barrel with Rem chokes they are available only in 3" Can my 870 take them or should I stick to 2 3/4"? I read somewhere about magnum receivers serial #'s begining with a "M" ..........Harold ......been loading Bismuth but it's $$$$$$$$$$$$$$$$$$$$$$$$$$$$$


















































