[quote=nhcrowshooter]I have what is an unusual choke marking (to me) on the right barrel of my Miroku 500E with Bermingham proof marks. As I noted above a brass choke gauge showed IC and Full and it's 40 yard patterns were 46% right and 84% left. As you can see in the attached picture the left barrel is stamped FC but the right barrel is stamp with three roman numeral I's. Has anybody seen this before? What does it mean, Cylinder, Skeet or IC?
Improved Modified. That's an IM.
That makes sense, weak stamping. So it would appear a previous owner had the choke relieved at some point which is just fine with me as I found wide open and full a good combination in the field for what I do. Thanks.
