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1910.243(d)(3) Requirements for Loads and Fasteners
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There shall be a standard means of identifying the power levels of loads used in tools.
No load (cased or caseless) shall be used if it will accurately chamber in any existing approved commercially available low-velocity piston tool or hammer operated piston tool - low-velocity type and will cause a fastener to have a mean velocity in excess of 300 feet per second when measured 6.5 feet from the muzzle end of the barrel. No individual test firing of a series shall exceed 300 feet per second by more than 8 percent.
Fasteners used in tools shall be only those specifically manufactured for use in such tools.