Dean, that post was just referring to Matt's experience with published vs. tested loads(and the importance of checking if concerned). I had assumed that was from a 12 gauge. In the next few weeks I am going to send a few 20 and 16 loads to be pressure tested, just so I know and I will share the results.
For the 20, I have settled on using Unique(which I have) until I can find some 20/28 powder.
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