WHAT DOES 17 HORNET BRASS MEAN?

According to the story, O’Brien wagered that his guideline could not get rid of the bear along with his rifle in .17 Mach IV—and missing the bet. I recall pondering if near examination would've unveiled various .375-inch holes the bear’s disguise. No matter, it absolutely was a silly stunt.The one warning I might add is on the market brass. F