In addition to whatever I shoot when I go to the gun range, (at least 2x per month) 5.56, 6.8 SPC, 45 ACP, or 9mm, it seems that on every trip I shoot at least 500 rounds of .22 lr, that puts my .22 lr use at about 2 cs. per year, or about 10000 rounds per year. If I have 4 cs., that is about 2...