Bill,
There was an article, way back, i doubt i'll find it in my stack of mag's. My point is the rationale for outlawing #12's and accepting #14's has comprable integrity to claiming 2 bullets in the chamber is safer than 3 playing russian roulette.
The trade has seen loose connections at every load status.

Testing lab's are nothing more than a 'liability' kicking post for the trade , AHJ & end user to point to.

They should not be considered the advocate of quality, which is evident in Consumer Reports and similar periodicals that regularly trash 'listed' goods. [Linked Image]