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[DISCLAIMER: The following text and illustrations are reproduced from a U.S. War Department pamphlet published in January 1945. The text may be inaccurate, and no attempt has been made to update or correct the material. Any views or opinions expressed do not necessarily represent those of the website.]
 


[Armor-Piercing Ammunition for Gun, 90-mm, M3]          

ARMOR-PIERCING AMMUNITION FOR GUN, 90-mm, M3

OFFICE OF THE CHIEF OF ORDNANCE
WASHINGTON, D.C.

JANUARY 1945


INTRODUCTION

Various models of the latest enemy Armored Force Vehicles encountered and captured on the battlefield were shipped to the Ordnance Research and Development Center, Aberdeen, Maryland, for tests and examination. Ballistic tests revealed the need for armor piercing ammunition with greater penetrative power to defeat the thick oblique armor plate being used. Immediate steps were taken to provide our troops with ammunition for the 90mm guns which possess the required penetrative ability. Three armor piercing rounds for the Gun, 90mm, M3 have been developed and a detailed description of each and comparative penetration performances are presented in this brochure.


TABLE OF CONTENTS

  Page
Shot, Fixed, H.V., A.P.-T., 90mm, T30E16
       Text..............................................1
       Text..............................................2
       Illustration of complete round..............................................2
       Illustration of shot..............................................3
       Firing Table..............................................3
       Illustration: Penetration of gun mantlet of "Panther" Tank..............................................4
       Illustration: Penetration of glacis plate of "Panther" Tank..............................................4
       Illustration: Penetration of lower nose plate of "Panther" Tank..............................................5
       Armor Penetration Curve..............................................5
 
Shot, Fixed, A.P.-T., 90mm, T33
       Text..............................................6
       Illustration of complete round..............................................7
       Illustration of shot..............................................7
       Firing Table..............................................8
       Firing Table..............................................9
       Illustration: Penetration of glacis plate of "Panther" Tank..............................................10
       Illustration: Penetration of glacis plate of "Panther" Tank..............................................11
       Armor Penetration Curve..............................................11
 
Projectile, Fixed, A.P.C.-T., 90mm, M82
       Text..............................................12
       Illustration of complete round..............................................13
       Illustration of projectile..............................................13
       Firing Table..............................................14
       Firing Table..............................................15
       Illustration: Penetration 2½ in. armor plate (55° obliq.)..............................................16
       Illustration: Penetration 2½ in. armor plate (55° obliq.)..............................................16
       Illustration: Penetration 1½ in. armor plate (55° obliq.)..............................................16
       Armor Penetration Curve..............................................17
 
General
       Illustration: Comparison of complete rounds..............................................17
       Aiming Data Chart 90-B-1..............................................18
       Aiming Data Chart 90-C-3..............................................18


SHOT, FIXED, H.V., A.P.-T., 90mm, T30E16.

DESCRIPTION. The Shot, H.V., A.P.-T., 90mm, T30E16 is issued as a fixed complete round for the Gun, 90mm, M3 mounted in Gun Motor Carriage, M36 or M36B1 and Heavy Tank, T26E3. The shot is a light weight projectile, consisting of a tungsten carbide core, aluminum body with nose plug and windshield and steel base tracer loaded.

Length:
       Shot          13.20 in.
       Complete Round35.90 in.
Weight:
       Shot16.70 lb.
       Complete Round36.00 lb. (Approx.)
Muzzle Velocity3,350 f/s

PURPOSE. This is a special hyper-velocity, armor piercing round for attack of heavily armored vehicles. It gives greatly increased penetrative performance up to 2,000 yards range over the standard A.P.C.-T., Projectile, 90mm, M82. It is especially effective at shorter ranges. Since tungsten carbide is a critical material these projectiles should be used sparingly and only when the situation requires increased armor penetration. This shot will penetrate all plates of the German Pz Kpfw V "Panther" and "King Tiger" Tanks. IT WILL DEFEAT THE GLACIS PLATE OF THE "PANTHER" AT RANGES UP TO 450 YARDS AND OF THE "KING TIGER" AT 100 YARDS RANGE. UP TO RANGES OF 800 YARDS THE SHOT WILL PENETRATE THE GUN MANTLET AND TURRET FRONT OF BOTH THE "PANTHER" AND "KING TIGER" TANKS.

FIRING DATA. a. Aiming data charts are provided for use with the fire control instruments on the Gun Motor Carriages, M36 and M36B1 and, Heavy Tank, T26E3. The use of these charts provides direct fire with the following rounds:
Shot, A.P.-T., T33
Shot, H.V., A.P.-T., T30E16
Projectile, A.P.C.-T., M82
Shell, H.E., M71

b. The following aiming data charts are contained in this brochure:

A.D.C. 90-B-1, 90mm Gun, (with muzzle brake) M3 on Heavy Tank, T26E3 with Coaxial Telescope, M71C and Periscope Telescopes, M77F and M80D.

A.D.C. 90-C-3, 90mm Gun, (without muzzle brake) M3 on Gun Motor Carriage, M36 or M36B1 with Coaxial Telescope, M76F.

c. Firing Tables are included in this booklet.

ACCURACY. Accuracy firings from the M3 Gun with the rounds loaded for a MV of 3,400 f/s have been conducted with the T30 type shot at a vertical target over a range of 2,100 yards. The extreme horizontal dispersion was 17 inches and the extreme vertical dispersion 30 inches.

PENETRATION. A curve showing the comparison of penetration vs. range of Projectile, A.P.C.-T., M82 and Shot, H.V., A.P.-T., T30E16 when fired against homogeneous armor plate a t 20° and 30° obliquity is contained in this report. Illustrations are included indicating results obtained with this shot against the "Panther" tank.

MARKING. Special markings appear on each cartridge case, container and box in red paint.
HYPERVELOCITY
MV 3350 F/S

[Shot, fixed, H.V., A.P.-T., T30E16 for Gun, 90mm, M3.]
Shot, fixed, H.V., A.P.-T., T30E16 for Gun, 90mm, M3.

[Shot, H.V., A.P., 90mm, T30E16.]
Shot, H.V., A.P., 90mm, T30E16.

GUN, 90MM, M3. SHOT, H.V., A.P.-T., T30E16. MUZZLE VELOCITY, 3350 F/S.
WEIGHT, 16.7 LBS. C7, 1.109.
Range
 
yards
       Elev.
 
mils
       Time of
Flight
seconds
       Max.
Ord.
feet
       Terminal
Velocity
f/s
       Range
 
yards
       Elev.
 
mils
       Time of
Flight
seconds
       Max.
Ord.
feet
       Terminal
Velocity
f/s
0   0.0   0.00   0   3350   1800   9.4   1.84   14   2580  
100   0.4   0.09   0   3305   1900   10.0   1.96   15   2540  
200   0.9   0.18   0   3260   2000   10.7   2.08   17   2500  
300   1.3   0.27   0   3216   2100   11.3   2.20   20   2461  
400   1.8   0.36   1   3171   2200   12.0   2.32   22   2422  
500   2.3   0.46   1   3127   2300   12.7   2.45   24   2383  
600   2.8   0.56   1   3083   2400   13.4   2.57   27   2345  
700   3.3   0.66   2   3039   2500   14.1   2.70   29   2307  
800   3.8   0.76   2   2996   2600   14.8   2.83   32   2269  
900   4.3   0.86   3   2953   2700   15.6   2.96   36   2232  
1000   4.8   0.96   4   2910   2800   16.3   3.09   39   2195  
1100   5.3   1.06   5   2868   2900   17.1   3.23   42   2159  
1200   5.9   1.17   6   2826   3000   17.9   3.37   46   2123  
1300   6.4   1.28   7   2784   3100   18.7   3.51   50   2087  
1400   7.0   1.39   8   2742   3200   19.6   3.66   54   2052  
1500   7.6   1.50   9   2701   3300   20.4   3.80   59   2017  
1600   8.2   1.61   10   2660   3400   21.3   3.95   64   1982  
1700   8.8   1.73   12   2620   3500   22.2   4.11   69   1948  

[Complete penetration of gun mantlet and turret front plate has been obtained against the German Pz Kpfw V Panther Tank by Shot, H.V., A.P., T30E16 at a range of 800 yards.]
Complete penetration of gun mantlet and turret front plate has been obtained against the German Pz Kpfw V "Panther" Tank by Shot, H.V., A.P., T30E16 at a range of 800 yards.

[Complete penetration at the juncture of machine gun ball mount with the glacis plate of  German Pz Kpfw V Panther Tank by Shot, H.V., A.P., T30E16 at a range of 800 yards.]
Complete penetration at the juncture of machine gun ball mount with the glacis plate of German Pz Kpfw V "Panther" Tank by Shot, H.V., A.P., T30E16 at a range of 800 yards.

[Complete penetration of lower nose plate of German Pz Kpfw V Panther Tank by Shot, H.V., A.P., T30E16 fired at a range of 600 yards.]
Complete penetration of lower nose plate of German Pz Kpfw V "Panther" Tank by Shot, H.V., A.P., T30E16 fired at a range of 600 yards.

[Armor Penetration vs. Range]


SHOT, FIXED, A.P.-T., 90mm, T33.

DESCRIPTION. The 90mm Armor Piercing Shot T33 is issued as a fixed complete round for the Gun, 90mm, M3 mounted in Heavy Tank, T26E3 and Gun Motor Carriages, M36 and M36B1. The shot is a modification of the standard AP, M77 which has been reheat-treated and to which a ballistic windshield has been attached.

Length:
       Shot          14.78 in.
       Complete Round37.53 in.
Weight:
       Shot24.06 lb.
       Complete Round43.82 lb.
Muzzle Velocity2,800 f/s

PURPOSE. This is the most effective shot for the defeat of high obliquity caliber thickness homogeneous armor plate. The shot will defeat all plates of the German Pz Kpfw V "Panther" Tank except the gun mantlet. IT WILL PENETRATE THE GLACIS PLATE OF THE "PANTHER" TANK UP TO 1,100 YARDS RANGE.

FIRING DATA. a. Aiming data charts are provided for use with the fire control instruments on the Gun Motor Carriages, M36 and M36B1 and Heavy Tank, T26E3. The use of these charts provides direct fire with the following rounds:
Shot, A.P.-T., T33
Shot, H.V., A.P.-T., T30E16
Projectile, A.P.C.-T., M82
Shell, H.E., M71

b. The following aiming data charts are contained in this brochure:

A.D.C. 90-B-1, 90mm Gun, (with muzzle brake) M3 on Heavy Tank, T26E3 with Coaxial Telescope, M71C and Periscope Telescopes, M77F and M80D.

A.D.C. 90-C-3, 90mm Gun, (without muzzle brake) M3 on Gun Motor Carriage, M36 or M36B1 with Coaxial Telescope, M76F.

c. Firing Tables are included in this booklet.

ACCURACY. Accuracy firings have been conducted with the T33 round loaded for a M.V. of 2800 f/s and fired from a standard 90-mm Gun over a range of 700 yards at a vertical target. An extreme horizontal dispersion of 16 inches and an extreme vertical dispersion of 19 inches was obtained.

PENETRATION. Armor penetration curves for the shot compared with the standard A.P.C.-T., M82 Projectile when fired against homogeneous armor plate at 20° obliquity are contained herein. Included are illustrations of results obtained, with this shot, against the German Pz Kpfw V "Panther" Tank.

MARKING. A special marking in black appears on each cartridge case, container and box:
MV 2800 F/S

[Shot, fixed, A.P.-T., T33 for Gun, 90mm, M3.]
Shot, fixed, A.P.-T., T33 for Gun, 90mm, M3.

[Cross Section of Shot, A.P., 90mm, T33.]
Cross Section of Shot, A.P., 90mm, T33.

GUN, 90MM, M3. SHOT, 90MM, A.P.-T., T33. MUZZLE VELOCITY, 2800 F/S. WEIGHT, 24.06 LBS.
Range
 
yards
       Elevation
 
mils
       Time of
Flight
seconds
       Maximum
Ordinate
feet
       Terminal
Velocity
f/s
0   0.0   0.00   0   2800  
100   0.6   0.11   0   2774  
200   1.2   0.22   0   2747  
300   1.9   0.33   0   2720  
400   2.5   0.44   0   2694  
500   3.2   0.55   1   2668  
600   3.9   0.66   2   2642  
700   4.6   0.77   2   2615  
800   5.3   0.88   3   2588  
900   6.0   1.00   4   2562  
1000   6.7   1.12   5   2536  
1100   7.4   1.44   6   2510  
1200   8.1   1.36   7   2484  
1300   8.9   1.48   9   2457  
1400   9.6   1.61   10   2431  
1500   10.4   1.73   12   2405  
1600   11.2   1.85   14   2379  
1700   12.0   1.98   16   2353  
1800   12.8   4.11   18   2328  
1900   13.6   2.24   20   2302  
2000   14.4   2.37   23   2276  
2100   15.2   2.50   26   2250  
2200   16.0   4.63   29   2225  
2300   16.9   2.77   32   2200  
2400   17.8   2.91   35   2174  
2500   18.7   3.05   38   2149  
2600   19.6   3.19   41   2123  
2700   20.5   3.33   45   2097  
2800   21.4   3.47   49   2072  
2900   22.3   3.62   53   2048  
3000   23.3   3.77   58   2023  
3100   24.3   3.92   63   1998  
3200   25.3   4.07   68   1973  
3300   26.3   4.22   73   1948  
3400   27.3   4.38   78   1924  
3500   28.3   4.54   84   1900  
3600   29.4   4.70   90   1876  
3700   30.5   4.86   96   1852  
3800   31.6   5.02   103   1828  
3900   32.7   5.19   110   1804  
4000   33.8   5.36   117   1781  
4100   35.0   5.53   124   1758  
4200   36.2   5.70   132   1734  
4300   37.4   5.87   140   1711  
4400   38.6   6.05   149   1688  
4500   39.8   6.23   158   1666  
4600   41.1   6.41   167   1644  
4700   42.4   6.59   177   1622  
4800   43.7   6.78   187   1600  
4900   45.0   6.97   197   1578  
5000   46.4   7.16   208   1556  
5100   47.8   7.35   219   1535  
5200   49.2   7.55   231   1514  
5300   50.7   7.75   243   1493  
5400   52.2   7.95   256   1472  
5500   53.7   8.16   270   1452  
5600   55.2   8.37   294   1432  
5700   56.8   8.58   299   1412  
5800   58.4   8.80   314   1392  
5900   60.0   9.02   330   1373  
6000   61.7   9.24   346   1354  
6100   63.4   9.46   363   1335  
6200   65.1   9.69   381   1316  
6300   66.9   9.92   399   1298  
6400   68.7   10.16   418   1280  
6500   70.5   10.40   438   1262  
6600   72.4   10.64   459   1244  
6700   74.3   10.89   481   1227  
6800   76.3   11.14   503   1210  
6900   78.3   11.39   546   1193  
7000   80.4   11.65   550   1177  
Note: When firing with the 90mm Gun, M3 without muzzle brake mounted in the
         Gun Motor Carriages, M36 or M36B1 add 0.6 mils to all values of elevation.

[German Pz Kpfw V (Panther) Tank, before firing.]
German Pz Kpfw V (Panther) Tank, before firing.

[German Pz Kpfw V (Panther) Tank; Complete penetration at 500 yards with Shot, A.P., 90mm, T33.]
German Pz Kpfw V (Panther) Tank; Complete penetration at 500 yards with Shot, A.P., 90mm, T33.

[Complete penetration of glacis plate of German Pz Kpfw V (Panther) Tank by Shot, A.P., 90mm, T33 at a range of 1000 yards.]
Complete penetration of glacis plate of German Pz Kpfw V (Panther) Tank by Shot, A.P., 90mm, T33 at a range of 1000 yards.

[Armor Penetration vs. Range]


Projectile, Fixed, A.P.C.-T., M82 (2,800 f/s M.V.)

DESCRIPTION. The M82 armor piercing projectile is issued as a fixed complete round for the Gun, 90mm, M3 mounted in Heavy Tank, T26E3 and Gun Motor Carriages, M36 and M36B1. The projectile has an armor piercing cap, ballistic windshield and an Expl. "D" bursting charge which is functioned by the Fuze, B.D., M68.

Length:
       Projectile          16.40 in.
       Complete Round38.24 in.
Weight:
       Projectile24.11 lb.
       Complete Round43.87 lb.
Muzzle Velocity2,800 f/s

PURPOSE. The muzzle velocity of this round is 2,800 f/s. The armor piercing cap makes this projectile especially efficient against thick face hardened armor plate. The bursting charge makes it extremely effective when penetrations are obtained. PENETRATIONS CAN BE OBTAINED ON ALL PLATES OF THE "PANTHER" AND "KING TIGER" TANKS EXCEPT FOR THE GLACIS PLATE AND THE GUN MANTLET.

FIRING DATA. a. Aiming data charts are provided for use with the fire control instruments on the Gun Motor Carriages, M36 and M36B1 and Heavy Tank, T26E3. The use of these charts provides direct fire with the following rounds:
Shot, A.P.-T., T33
Shot, H.V., A.P.-T., T30E16
Projectile, A.P.C.-T., M82
Shell, H.E., M71

b. The following aiming data charts are contained in this brochure:

A.D.C. 90-B-1, 90mm Gun, (with muzzle brake) M3 on Heavy Tank, T26E3 with Coaxial Telescope, M71C and Periscope Telescopes, M77F and M80D.

A.D.C. 90-C-3, 90-mm Gun, (without muzzle brake) M3 on Gun Motor Carriage, M36 or M36B1 with Coaxial Telescope, M76F.

c. Firing Tables are included in this booklet.

ACCURACY. Firings for accuracy with the round loaded for a M.V. of 2,800 f/s from the M3 Gun over a range of 2,100 yards at a vertical target gave an extreme horizontal dispersion of 41 inches and 70 inches extreme vertical dispersion.

PENETRATION. Armor penetration vs. range curves for the projectile when fired against 20° and 30° obliquity homogeneous armor plate are included in this booklet. Illustrations showing the results of firings of this round against plates similar to those of the "Panther" tank are presented following this discussion.

MARKINGS. Special markings are painted in black on each cartridge case, container and box.
MV 2800 F/S

[Projectile, fixed, A.P.C.-T., M82 for Gun, 90mm, M3.]
Projectile, fixed, A.P.C.-T., M82 for Gun, 90mm, M3.

[Cross Section of Projectile, A.P.C.-T., 90mm, M82.]
Cross Section of Projectile, A.P.C.-T., 90mm, M82.

GUN, 90MM, M3. PROJECTILE, A.P.C.-T., M82. FUZE, B.D., M68. MUZZLE VELOCITY, 2800 F/S. WEIGHT, 24.11 LBS.
Range
 
yards
       Elevation
 
mils
       Time of
Flight
sec
       Maximum
Ordinate
feet
       Terminal
Velocity
f/s
0   0.0   0.00   0   2800  
100   0.6   0.11   0   4777  
200   1.3   0.22   0   2753  
300   1.9   0.33   0   2729  
400   2.5   0.44   1   2706  
500   3.2   0.55   1   2683  
600   3.9   0.66   2   2660  
700   4.5   0.77   2   2636  
800   5.2   0.88   3   2612  
900   5.9   1.00   4   2589  
1000   6.6   1.12   5   2566  
1100   7.3   1.44   6   2543  
1200   8.1   1.36   7   2520  
1300   8.8   1.48   8   2496  
1400   9.5   1.60   10   2473  
1500   10.3   1.72   12   2450  
1600   11.1   1.84   14   2427  
1700   11.8   1.96   16   2403  
1800   12.6   2.08   18   2380  
1900   13.4   2.21   20   2357  
2000   14.2   2.34   22   2334  
2100   15.0   2.47   24   2311  
2200   15.8   2.60   27   2288  
2300   16.6   2.73   30   2265  
2400   17.4   2.86   33   2242  
2500   18.3   3.00   36   2220  
2600   19.2   3.14   39   2198  
2700   20.0   3.28   43   2176  
2800   20.9   3.42   47   2153  
2900   21.8   3.56   51   2130  
3000   44.7   3.70   55   2108  
3100   23.6   3.84   59   2086  
3200   24.5   3.99   64   2063  
3300   25.4   4.13   69   2041  
3400   26.4   4.28   74   2019  
3500   27.4   4.43   79   1997  
3600   28.4   4.58   84   1975  
3700   29.3   4.73   90   1953  
3800   30.3   4.88   96   1931  
3900   31.3   5.04   102   1910  
4000   32.4   5.20   109   1889  
4100   33.5   5.36   116   1868  
4200   34.5   5.52   123   1847  
4300   35.6   5.68   130   1826  
4400   36.7   5.85   138   1805  
4500   37.9   6.02   146   1784  
4600   39.1   6.19   154   1763  
4700   40.3   6.36   163   1743  
4800   41.5   6.53   174   1722  
4900   42.7   6.71   182   1701  
5000   44.0   6.89   192   1681  
5100   45.3   7.07   202   1662  
5200   46.6   7.25   413   1642  
5300   47.9   7.44   224   1623  
5400   49.2   7.62   235   1604  
5500   50.5   7.81   247   1585  
5600   51.9   8.00   259   1566  
5700   53.2   8.19   474   1547  
5800   54.6   8.39   285   1528  
5900   56.1   8.59   299   1509  
6000   57.5   8.79   313   1491  
6100   59.0   8.99   328   1473  
6200   60.5   9.20   343   1455  
6300   62.0   9.41   359   1437  
6400   63.6   9.62   375   1419  
6500   65.2   9.84   392   1401  
6600   66.8   10.06   410   1384  
6700   68.5   10.28   428   1366  
6800   70.2   10.50   447   1349  
6900   71.9   10.73   466   1333  
7000   73.6   10.96   486   1316  
Note: When firing with the 90mm Gun, M3 with muzzle brake mounted in the
         Heavy Tank, T26E3, add 0.4 mil to all values of elevation.
 
         When firing with the 90mm Gun, M3 without muzzle brake mounted in the
         Gun Motor Carriages, M36 or M36B1, add 0.3 mil to all values of elevation.

[Complete penetration of Projectile, A.P.C., M82 (2800 f/s M.V.) fired against 2.5 in. of homogeneous armor at 55° obliquity. (Lower nose plate of Panther Tank is 2.4 in. at 55°.) Penetration obtained at the following ranges: Rd. 5, Point Blank; Rd. 6, 650 yards; Rd. 8, 950 yards.]
Complete penetration of Projectile, A.P.C., M82 (2800 f/s M.V.) fired against 2.5 in. of homogeneous armor at 55° obliquity. (Lower nose plate of "Panther" Tank is 2.4 in. at 55°.) Penetration obtained at the following ranges: Rd. 5, Point Blank; Rd. 6, 650 yards; Rd. 8, 950 yards.

[Complete penetration of Projectile, A.P.C., M82 (2800 f/s M.V.) fired against 2.5 in. of homogeneous armor late at 55° obliquity. (Lower nose plate of Panther Tank is 2.4 in. at 55°.) Penetration obtained at the following ranges: Rd. 5, Point Blank; Rd. 6, 650 yards; Rd. 8, 950 yards.]
Complete penetration of Projectile, A.P.C., M82 (2800 f/s M.V.) fired against 2.5 in. of homogeneous armor late at 55° obliquity. (Lower nose plate of "Panther" Tank is 2.4 in. at 55°.) Penetration obtained at the following ranges: Rd. 5, Point Blank; Rd. 6, 650 yards; Rd. 8, 950 yards.

[Projectile, A.P.C., M82 (2800 f/s M.V.) fired against 1.5 in. of homogeneous armor plate at 50°. (Side superstructure plate of Panther Tank is 1.5 in. at 40°). Penetration obtained at the following ranges: Rd. 9, 4800 yards; Rd. 10, 5450 yards; Rd. 11, 5850 yards.]
Projectile, A.P.C., M82 (2800 f/s M.V.) fired against 1.5 in. of homogeneous armor plate at 50°. (Side superstructure plate of "Panther" Tank is 1.5 in. at 40°). Penetration obtained at the following ranges: Rd. 9, 4800 yards; Rd. 10, 5450 yards; Rd. 11, 5850 yards.

[90mm Armor Penetration vs. Range Graph]

[Complete rounds for 90mm Gun, M3. No. 1 -- Projectile, A.P.C.-T., 90mm, M82; No. 2 -- Shot, A.P.-T., 90mm, T33; No. 3 -- Shot, H.V., A.P.-T., 90mm, T30E16. All rounds assembled with Case, Cartridge, 90mm, M19.]
Complete rounds for 90mm Gun, M3. No. 1—Projectile, A.P.C.-T., 90mm, M82; No. 2—Shot, A.P.-T., 90mm, T33; No. 3—Shot, H.V., A.P.-T., 90mm, T30E16. All rounds assembled with Case, Cartridge, 90mm, M19.

[Aiming Data Chart 90-B-1]

[Aiming Data Chart 90-C-3]

 


   
 
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