Originally Posted By: Geo. Newbern
....If layered proof standards were adopted to prevent the destruction of older less strongly built guns all the public would know was that it passed proof....

If? I thought the proof markings were 'layered' now. There are so many questions here about folks asking what proof marks mean. Are the marks really so clear. If a gun is marked 12 ga., now the general public is protected from harm by using anything that comes out of a box marked 12 ga.?

I think the topic started off by the original fellow noticing that some procedure at the Birmingham proof house has changed recently which translates to more proof failures. Was the change arbitrary for a preferential purpose, or was there evidence of public harm from inadequate proof testing?