A note on proof, "hillbilly" or any other. Proof firing is necessary to get to after proof viewing. The test is only as good as the viewer and the viewing. Guns most usually don't disappear in a blinding flash and a resounding thunderclap. But, sometimes parts deform beyond their elastic limit. It is the duty of the viewer to "see" this deformation - via eyeballs or gages. The "hillbilly" method usually skips over the viewing. I'd bet sporting money that Dennis (above) gives every gun he proofs a really good viewing.
DDA
