Back at it. I have been thinking my BCG was Adams arms but it is actually Alexander Arms. I have found that they make the 6.5 and .50 beuwulf. And everyone has said the BCG is heavy duty. So that's a good thing. The bolt is stamped with a D and everything I've found its DPMS. So I will be buying an extra bolt soon. Trying to figure out what I have in this gun is giving me a headache. I think I will build my on soon just so I know what I have. ImageUploadedByFirearms Talk1403913085.399627.jpg
You could take it a smithy or try it your self , cast the chamber and forcing cone area and see how it measures up. Might be the only why to know for sure. Pull your barrel would make it easier too.
Good ole midway shows ya how.