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| U.S. EXPLOSIVE ORDNANCE |
| PART 1 - PROJECTILES, PROPELLANT, AND PROECTILE FUZES |
| Chapter 1 - Projectiles |
| Section 3 - 4-INCH PROJECTILES |
| 4-inch H.C. Mk 15 Mod 1 and Ex-2 and Ex-2-1 |
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Guns used in |
4"/50 |
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Overall length, inches |
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With nose fuze |
18.00 |
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Without nose fuze |
14.28 |
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Diameter of base, inches |
3.96 |
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Distance base to band, inches |
2.25 |
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Width of band, inches |
1.85 |
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Diameter at bourrelet, inches |
3.985 |
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Filling |
Explosive D |
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Weight of filling, pounds |
2.71 |
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Weight of loaded projectile, pounds |
33.00 |
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Charge/weight ratio |
8.21% |
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Cartidge Case |
Mk 2 Mods 1 and 4 |
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Primer |
Mk 13 and all Mods |
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Tracer |
Mk 4 or Mk 9 |
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Fuzes |
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Base |
Mk 31 or Mk 28 (B.D.F.) |
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Nose |
Mk 30 Mods 1, 2, 3 (P.D.F.) |
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Mk 22 Mods 1-5 (M.T.F.) |
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Steel nose plug |
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Mk 51 and all Mods (M.T.F.) |
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Auxiliary Detonating Fuze |
Mk 17 or Mk 46 |
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Mk 54 Mod 0 |
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The Base Fuze Mk 31 is preferred for this projectile. The Tracer Mk 4 is used with the Base Fuze Mk 31; the Mk 9, with the Fuze Mk 28. |
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The 4"/50 Ex-2 and Ex-2-1 are identical to Projectile Mk 15 except they are one pound heavier. Approximately 18,000 of the Ex projectiles were manufactured and issued. |
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The Auxiliary Detonating Fuze Mk 54 is replacing the Mk 17 and the Mk 46 fuzes in all assemblies. |
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Assembly of the Nose Fuze Mk 22 (M.T.F.) with this projectile has stopped. |
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Figure 26. 4-inch H.C. Mk 15 Mod 1 |
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