Trey, try the Austrian Stomp. Once you have the first nine rounds in the magazine, with your thumb over the top round, smack the base of the magazine against a firm surface and then try inserting the tenth round. It may require two or three firm raps to get that last round in, but it works.
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Guns cause crime like spoons cause Rosie O'Donnell to be fat!
I hunt, therefore I am.