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8" Mark VI M3A2 - Navy 8" gun adapted for coastal defense batteries and railway Batteries.
 8" Projectiles
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 8" Projectile and Powder Bags
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 8" Mark VI M3A2 Gun and M1 Barbette Carriage from TM 9-442
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 8" Mark VI M3A2 Gun and Railroad, M1A1, Baldwin Carriage
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8" Mark VI M3A2 Gun & M1 Carriage Specifications
| Specification
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Value
|
Units
|
| Weight of Gun Complete
|
55,290
|
Lbs
|
| Weight of Carriage
|
58,470
|
Lbs
|
| Total Weight
|
113,860
|
Lbs
|
| Caliber
|
8
|
Inches
|
| Length of Bore
|
45
|
Calibers
|
| Length (Muzzle to Face)
|
369
|
Inches
|
| Length of Rifling
|
288.79
|
Inches
|
| Depth of Rifling
|
.07
|
Inches
|
| Grooves
|
64
|
Number
|
| Traverse
|
360
|
Degrees
|
| Max Firing Elevation
|
45
|
Degrees
|
| Min Firing Elevation
|
0
|
Degrees
|
| Loading Elevation
|
-5
|
Degrees
|
| Max Rate of Fire Zero Degrees
|
3
|
Rounds/min
|
| Max Rate of Fire 45 Degrees
|
2
|
Rounds/min
|
Max Range AP
Mk XX 260 lb Shell
|
32,000
|
Yards
|
Max Range HE
M103 240 lb Shell
|
35,000
|
Yards
|
| Normal Powder Charge Weight
|
75/12
|
Lb/Oz
|
| Super Powder Charge Weight
|
108/8
|
Lb/Oz
|
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8" Mark VI M3A2 Gun & M1A1 Railway Carriage Specifications
| Specification
|
Value
|
Units
|
| Weight of Gun Complete
|
42,000
|
Lbs
|
| Weight of Carriage & Mount
|
188,000
|
Lbs
|
| Total Weight at Rail
|
230,000
|
Lbs
|
| Caliber
|
8
|
Inches
|
| Length of Bore
|
45
|
Calibers
|
| Length (Muzzle to Face)
|
369
|
Inches
|
| Length of Rifling
|
288.79
|
Inches
|
| Depth of Rifling
|
.07
|
Inches
|
| Grooves
|
64
|
Number
|
| Traverse
|
360
|
Degrees
|
| Max Firing Elevation
|
45
|
Degrees
|
| Min Firing Elevation
|
0
|
Degrees
|
| Loading Elevation
|
-5
|
Degrees
|
| Max Rate of Fire Zero Degrees
|
?
|
Rounds/min
|
| Max Rate of Fire 45 Degrees
|
?
|
Rounds/min
|
Max Range AP
Mk. XX 260 lb Shell
|
32,000
|
Yards
|
Max Range HE
M103 240 lb Shell
|
.....
|
Yards
|
| Normal Powder Charge Weight
|
75/12
|
Lb/Oz
|
| Super Powder Charge Weight
|
108/8
|
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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