The story goes that the guy was shooting at the range and left his bore sighter in before he fired and well I'll let the picture do the talking.

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"No free man shall ever be debarred the use of arms." ~Thomas Jefferson, 1776

You have enemies? Good. That means you've stood up for something, sometime in your life."
~Winston Churchill

A few years ago I was a muzzleloader camp in the U.P. of Michigan. One guy loaned out his muzzleloader to a buddy, but did not tell him that it was already loaded. Lucky for the friend, he did not get a shot because when hunt was over they found out it was double loaded! Be careful.