Firearms Examination Unit Technical Procedures

Issued: 5/1/2020 Chapter: FTP03. Issued By: Director Version: 5 ... The acceptable range for this measurement must be 308.6 +/- 0.5 grains. ... Open the jaws of the caliper and measure the widths of the 0.500 inch and 1.000 inch gage blocks. Use the entire surface of the jaws, being careful to … ................
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