I have been considering a .300 blackout build. It is something I have wanted to do for a long time. I have been going back and forth with the decision mainly because I have an ar10. I am think of building a pistol until I get a tax stamp to make it a sbr. I was also considering just doing a 16" barrel and use it for deer hunting, I just don't know how well the round will perform. Please help either talk me into it or out of it.