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8" Mark VI M3A2 - Navy 8" gun adapted for coastal defense batteries and railway Batteries.
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 8" Projectile and Powder Bags |
 8" Mark VI M3A2 Gun and M1 Barbette Carriage from TM 9-442 |
 8" Mark VI M3A2 Gun and Railroad, M1A1, Baldwin Carriage |
8" Mark VI M3A2 Gun & M1 Carriage Specifications
| Specification
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Value
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Units
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| Weight of Gun Complete
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55,290
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Lbs
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| Weight of Carriage
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58,470
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Lbs
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| Total Weight
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113,860
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Lbs
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| Caliber
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8
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Inches
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| Length of Bore
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45
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Calibers
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| Length (Muzzle to Face)
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369
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Inches
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| Length of Rifling
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288.79
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Inches
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| Depth of Rifling
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.07
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Inches
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| Grooves
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64
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Number
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| Traverse
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360
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Degrees
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| Max Firing Elevation
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45
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Degrees
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| Min Firing Elevation
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0
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Degrees
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| Loading Elevation
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-5
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Degrees
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| Max Rate of Fire Zero Degrees
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3
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Rounds/min
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| Max Rate of Fire 45 Degrees
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2
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Rounds/min
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Max Range AP
Mk XX 260 lb Shell
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32,000
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Yards
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Max Range HE
M103 240 lb Shell
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35,000
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Yards
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| Normal Powder Charge Weight
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75/12
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Lb/Oz
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| Super Powder Charge Weight
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108/8
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Lb/Oz
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8" Mark VI M3A2 Gun & M1A1 Railway Carriage Specifications
| Specification
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Value
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Units
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| Weight of Gun Complete
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42,000
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Lbs
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| Weight of Carriage & Mount
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188,000
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Lbs
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| Total Weight at Rail
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230,000
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Lbs
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| Caliber
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8
|
Inches
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| Length of Bore
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45
|
Calibers
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| Length (Muzzle to Face)
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369
|
Inches
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| Length of Rifling
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288.79
|
Inches
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| Depth of Rifling
|
.07
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Inches
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| Grooves
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64
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Number
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| Traverse
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360
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Degrees
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| Max Firing Elevation
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45
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Degrees
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| Min Firing Elevation
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0
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Degrees
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| Loading Elevation
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-5
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Degrees
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| Max Rate of Fire Zero Degrees
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?
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Rounds/min
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| Max Rate of Fire 45 Degrees
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?
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Rounds/min
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Max Range AP
Mk. XX 260 lb Shell
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32,000
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Yards
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Max Range HE
M103 240 lb Shell
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.....
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Yards
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| Normal Powder Charge Weight
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75/12
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Lb/Oz
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| Super Powder Charge Weight
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108/8
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Lb/Oz
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See Also:
Sources:
- TM 9-442 Technical Manual - 8-Inch Seacoast Materiel Gun MK. VI Mod. 3A2; Barbette Carriage M1, 19 Apr 1943
- TM 9-463 Technical Manual - Gun, In., MK. VI, Mod. 3A2 and Mount, Railway, Gun, 8 In., M1A1, 26 Jan 1942
- FM 4-49 Field Manual - Service of the Piece - Seacoast Artillery - 8-Inch Gun, Mark VI, Modification 3A2, On Railway Mount M1A1, 5 Apr 1943
Links:
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