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| U.S. EXPLOSIVE ORDNANCE |
| PART 1 - PROJECTILES, PROPELLANT, AND PROECTILE FUZES |
| Chapter 1 - Projectiles |
| Section 11 - 20-mm PROJECTILES |
| 20-mm A/C Ball Mk 1 (Old Series) |
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Over-all length, inches |
3.31 |
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Diameter of base, inches |
0.770 |
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Distance base to band, inches |
0.50 |
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Width of band, inch |
0.203 |
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Diameter at bourrelet, inch |
0.784 |
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Filling |
None |
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Weight of loaded projectile, pound |
0.28 |
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Cartridge Case |
M21A1 |
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Primer |
M36 |
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This round is to be suerseded by the practice round M99 of the new ballistically mat-ched series. The Ball Mk 1 round is to be classified unserviceable by Naval activities as soon as replacement allowances or stocks of the M97 round are received. |
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Figure 75 (Part 2). 20-mm Projectiles. |
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