Well I'm weighing in way too late here, I understand. Those are either some mighty little hands or mighty big 20 gage chambers. I'm thinking that's a refinished 12 gage, but the only stumbling block I have is that the barrel stamping doesn't look familiar to me. Mine's in storage at my brother's house so I have to wait to look. Either way, some of you jumped on him WAY too hard....unless you were born knowing unlike me. I began on this site with a question about my Drillings and received a wealth of knowledge, let's afford this guy the same courtesy. Regardless of what it is in origin, these are EXCELLENT in handling and function. And Winny XLite target works fine as long as a GUNSMITH gives you the green light first. Best Wishes to All!