| 摘要 |
<p>The disclosure herein describes a lead free, non abrasive, frangible practice ammunition comprising a compacted mixture of fine copper powder and of a thermoplastic resin selected from the group consisting of nylon 11 and nylon 12. The mixture which is compacted by injection molding has at least 90 % by weight of copper and a minimum specific gravity of 5.7.</p> |
