I have some projectiles that I am going to sell. I have no idea of their value or what ESTand table to put these on. Can I get some help here? The large red one has been on this forum previously but has not been definately Id'ed. It measures 12"x a little under 3". It has some markings that I had recently uncovered. It is solid and weighs 17lbs. The other measures almost 5"x 1 1/2". Maybe anti tank? Value and Id and what stand to post these on would be appreciated. Thanks, Bill
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measure them in milimeters for thier diameter. the smaller one is probably 37 or 40 mm. if its just under the 1.5 inch mark its probably 37mm. also look very carefully at the bottoms or the projectiles to see if there are any stamps.
once you get exact measurements you can do web searches for armorment in those sizes.this is the best i can do for you. i am sure that there are people here who know what they are! best wishes
markComment
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It measures 76.2mm. It weighs 17 pounds. I am thinking the British 17 pounder armor piercing AP. Now, why the red paint? ThanksComment
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try to use some white out on the markings,it will help them show up alot better.the germans have a 7.62 cm he shell.can the top be removed at all? if its solid i would guess that it is for drilling?Comment
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i did some searching the web and found this,its probably a u.s 3 inch ap round.it says that they didnt have explosive fillers all the time. so if you look closely you may just find some kind of us ordenance mark or not? at this point after having to try to web search to help you when i know darn well there are quite a few people here who knew exactly what it was but are unwilling to help,i now question what is the point of joining this forum? if i have to answer every question for myself after exhaustive searchs anyway,why should i or any other new memnber share not only thier pieces but thier knowledge! below is the best info i could find so i hope i have helped you.best wishes
m.shock
Designation 3"/50 (7.62 cm) Marks 10, 17, 18, 19, 20, 21 and 22
Ship Class Used On Many ships 1915 through 1945
Date Of Design Mark 10: 1914
Mark 22: 1944
Date In Service Mark 10: 1915
Mark 22: 1944
Gun Weight 1,760 lbs. (798 kg)
Gun Length oa 159.7 in (4.055 m)
Bore Length 150.3 in (3.816 m)
Rifling Length 126.1 in (3.204 m)
Grooves (24) 0.03 in deep (0.76 mm)
Lands N/A
Twist Mark 10: Increasing RH 0 to 1 in 25
Mark 18: Uniform RH 1 in 32
Mark 19: Uniform RH 1 in 32
Mark 20 Mod 0: Increasing RH 0 to 1 in 25
Mark 20 Mod 1: Uniform RH 1 in 25
Mark 21 Mod 0: Uniform RH 1 in 32
Others: N/A
Chamber Volume 217 in3 (3.56 dm3)
Rate Of Fire 15 - 20 rounds per minute
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Ammunition
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Type Fixed
Weight of Complete Round All - 24 lbs. (10.9 kg)
Projectile Types and Weights
(see Note 1) AP Mark 29 Mods 1 and 2 - 13.1 lbs. (5.9 kg)
HC Mark 27 Mod 1 - 13 lbs. (5.9 kg)
AA Mark 23 Mods 1 and 3 - 13 lbs. (5.9 kg)
AA Mark 27 Mods 1 and 4 - 13 lbs. (5.9 kg)
AA VT Mark 31 Mod 1 - 13 lbs. (5.9 kg)
Illum Mark 21 Mods 1 and 3 - 13 lbs. (5.9 kg)
Illum Mark 24 Mod 1 - 13 lbs. (5.9 kg)
Illum Mark 25 Mod 1 - 13 lbs. (5.9 kg)
Bursting Charge
(see Note 2) AP - 0.3 lbs. (0.14 kg) Explosive D
HC - 0.74 lbs. (0.34 kg) Cast TNT
AA - 0.74 lbs. (0.34 kg) Cast TNT
AA VT - 0.54 lbs. (0.24 kg) Cast TNT, Comp. A
Projectile Length AP - 12.16 in (30.9 cm)
HC and AA (including nose fuze) - 12.13 in (30.8 cm)
AA VT (including nose fuze) - 12.22 in (31.0 cm)
Cartridge Case Type, Size and Empty Weight Mark 3 Mods 0 and 3 - Brass, 76.2 x 595 mm, 7.0 lbs. (3.18 kg)
Mark 3 Mod 2 - Brass, 76.2 x 595 mm, 7.88 lbs. (3.57 kg)
Mark 7 - Brass, 7.62 x 584 mm, 7.0 lbs. (3.18 kg)
Mark 9 - Steel, 7.62 x 584 mm, 6.54 lbs. (2.97 kg)
Propellant Charge
(see Note 5) 3.7 lbs. (1.68 kg) SPD 033
4.0 lbs. (1.81 kg) SPD or SPDN
Muzzle Velocity 2,700 fps (823 mps)
Working Pressure 17.0 tons/in2 (2,680 kg/cm2)
Approximate Barrel Life
(see Note 3) 4,300 rounds
Ammunition stowage per gun N/A
Notes:
1) The AA Mark 23 and its associated Cartridge Case Mark 3 were considered to be obsolete by the end of World War II. HC Mark 27 and AA Mark 27 were the same projectiles but assembled with different fuzes. These 3" (7.62 cm) HC rounds were unique in that they were the only ones of that type issued by the USN that did not have a base fuze in addition to a nose fuze.
2) AP was originally issued without any explosive filler and used a tracer-only base fuze. Explosive was added sometime during the 1930s and was then given the Army Base Fuze M66A1.
3) Barrel Life figure is for guns with chrome plated bores. Non-plated guns would have been about 3,000 rounds. Wet guns are also noted as having less life than other chrome plated guns, but I lack data for these.
4) Bourrelet diameter was 2.980 inches (7.57 cm).
5) Some SPD and SPDN cartridges had flashless pellets added which gave them a "reduced" flash.
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Range
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Elevation With 13 lbs. (5.9 kg) HE
MV = 2,700 fps (823 mps) Striking Velocity Angle of Fall
2.0 degrees 3,000 yards (2,740 m) 1,230 fps (375 mps) 3.4
4.3 degrees 4,500 yards (4,150 m) 971 fps (296 mps) 8.4
43 degrees 14,600 yards (13,350 m) --- ---
AA Ceiling 30,400 feet (9,270 m) --- ---
Note: Time of flight for MV = 2,700 fps (823 mps)
3,000 yards (2,740 m): 5.1 seconds
4,500 yards (4,150 m): 9.3 seconds
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Mount / Turret Data
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Designation Dry Mountings
For Mark 10 guns: Mark 11
For Mark 20 guns: Mark 20
For Mark 21 and 22 guns: Marks 22, 24 and 26
Wet mountings (submarines)
For Mark 17 guns: Mark 11
For Mark 18 guns: Mark 18
For Mark 21 guns: Mark 21
Weight 3.0 to 4.2 tons (3.1 to 4.3 mt)
Elevation -15 / +85 degrees
Elevation Rate Manually operated, only
Train 360 degrees
Train Rate Manually operated, only
Gun recoil N/A
Notes:
1) Battleships in the 1920s carried as many as ten of these weapons.
2) Almost all of these marks were manually worked. In 1945, Mark 22 mounts were given power drives and then designated as Mark 26 with elevation speed of 24 degrees per second and training speed of 30 degrees per second.
3) The Mark 24 was introduced late in World War II and was an entirely new DP type. This mounting was designed by Northern Pump and characterized by a counter-recoil spring wrapped around the base of the barrel. Weight was 8,235 lbs. (3,735 kg).
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I know. It is hard to believe the amount of views and so few responses. I am not sure what that is about? Thanks for your help. I will look at your charts and hopefully can come up with an id. BillComment
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After removing more red paint and rust, with a loop had found these markings. MK V11. With that and many many hours I had found that this a British round. Used late in the war. Ordnance, QF, 17-pounder MK. V11 76mm/L55 AP Comet Tank. The other markings I cannot decypher are L 3 I am guessing that this round is quite rare. I hope that this helps other researchers on this type of ordnance. All markings are on the side just above the band. There is no cap, it is solid. Thanks for the help. BillComment
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