The Ruger 10/22 has not only become one of the most widely produced .22 rimfires rifles ever made, its pattern has become the de-facto pattern for a box-magazine fed, semi-automatic rimfire rifle.

22 Long Rifle (.22 LR) revolver. Sturm, Ruger & Co. Inc ... 40 Grain Copper Plated Round Nose ammo and a USPSA/IPSC paper target. I divvied the course into twenty-five rounds of headshots ...