I have never met Bart. I have read hundreds of his posts on the internet, both the old usenet rec.guns in the 1990s and the newer www with forums.
He used to make fun of other guys for having a "wallet group", five shots that would fit under a dime, cut out and put in the wallet to show off. From looking at his 1997 20 shot 800 yard 308 group, it looks like it has been in his wallet:)