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The .22 Long Rifle (metric designation: 5.6×15mmR) cartridge is a long-established variety of .22 caliber rimfire ammunition, and in terms of units sold is still by far the most common ammunition in the world today.
The cartridge is often referred to simply as .22 LR and various rifles, pistols, revolvers, submachine guns and even some smoothbore shotguns (No. 1 bore) have been manufactured in this caliber.

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  1. ilikegunspdx

    CCI .22 sound levels non-scientific test results

    For those of you curious about the sound levels of 22 ammo here are the results of a simple, non-scientific test I did today. dB levels of various cci 22 rounds in a HK/Walther 416 pistol (9" barrel). Sound level measured with Iphone app (NIOSH) about 15' away and to the side of the gun. All...
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