I can't speak to the articles as I no longer subscribe to any print magazines.
But I have watched the Handloader TV series on YouTube, and I like this concept and format. I think Jeremiah does a pretty good job, although he could use some coaching on public speaking. This isn't to say I feel his presentation is bad or unwatchable, just that he's clearly very new to presenting to a camera, and it's pretty clear he's not yet comfortable in this presentation format.
As to the hat, it never even crossed my mind to have an opinion on his choice of headwear.
