The lowest 5.56 price was $0.41 from https://www.outdoorlimited.com/prvi-ppu-5.56x45mm-nato-ammunition-m193-pp52-55-grain-full-metal-jacket-20-rounds/ but at these low prices they may sell out fast. For NATO quality 5.56, my preferred choice for many reasons, the best price was $0.50 each at https://www.natchezss.com/winchester-usa-lake-city-m193-rifle-ammunition-5-56mm-55gr-fmj-3240-fps-1000-ct.html Shooting many different brands and types of ammo can result in lower accuracy. For this reason, I prefer the NATO spec ammo for 5.56 in 55 grains.
Rim Fire 22 caliber ammo is a must have, for training, pleasure shooting and hunting small games. It is cost effective and much better for training beginners than giving them a hand held cannon to shoot. My kids start out shooting a BB Gun, around age 10, with close supervision, and then graduate to a 22 in a few years. At age 12, they are safely shooting metal targets with confidence.. Bing.... Bing.... Bing... Bing... Bing.... Bing... hitting every shot using a western style 6-shot revolver.
At 7.7 cents per round ($0.07), you can buy 3,250 target rounds for $250 at: https://www.luckygunner.com/22-lr-40-gr-lrn-federal-champion-auto-match-target-3250-rounds . This is the same price as 10 boxes (500) AR rounds. You can buy smaller quantities of good quality at $0.16 per round at: https://www.bulkammo.com/100-rounds-of-22-lr-ammo-by-cci-40gr-cprn
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