Quote Originally Posted by Justintyler View Post
I guess I should have been more clear. "Round" wasn't the correct term. I use full length sized piece of brass . .
I know exactly what you meant, and I still meant what I said... Compressing against the shoulder of a soft piece of brass can potentially yield greater errors than a milled piece of steel, plus that piece of brass may not be resized to the perfection that the GO gauge has been milled to. That method may have been "acceptable" 15-20 years ago, and probably does work 999 out of a 1000 times, but with the cost of a proper, quality GO gauge only being $30, why risk it. Again, sorry if I've sounded harsh, but when it comes to working on firearms, I am a firm believer in absolute safety first, which means the correct tools for the job. If you screw something up, you can literally be holding your own life in your hands.... or, forbid, someone else's if they are shooting it.