What I do know is that NRA bullseye matches, known as “NRA Precision Pistol” matches since 2010, have existed in their current three-pistol, 2,700-point format since 1941. There is plenty of anecdotal history, but no specific history is easy to find in known books, and I found nothing digitized.
While researching the history of bullseye competition, I was surprised at the lack of documentation regarding these targets. There’s also an 8-ring, which brings the entire center target size to 8 inches in diameter. (The “B6” target is used for slow fire.) The B8 consists of a black bullseye with a 1.695-inch X-ring, a 3.36-inch 10-ring, and the 9-ring, which grows the black to 5.54 inches across. Designed for NRA-sanctioned bullseye events, the “B8” is the official target for timed- and rapid-fire stages.