Firearms may be damaged, and death or serious injury to the shooter or other persons may result, from any condition which contributes to the generation of excessive pressure, or the uncontrolled release of gas, within a firearm. The foregoing adverse conditions can be caused by bore or chamber obstructions, propellant powder overloads, or by defective, incorrect, or improperly loaded and assembled cartridge components. The relatively soft and thin metal used in .22 caliber rimfire cartridges makes burst caseheads a not uncommon occurrence in firearms of this caliber, therefore, always wear shooting glasses.
It is extremely dangerous to use a cartridge whose pressure is greater than that developed by cartridges loaded to Industry Standards. Even the strongest firearm can be blown up as a result of excessive pressure.
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