CARTRIDGE SA 12 BORE 70MM "ASTRAM"
GENERAL :
This ammunition is fired from a 70 mm Chamber 12 Bore Gun. This cartridge is an improvement on our existing popular brand "Special" Paper cartridges in so far as their construction and performance characteristics are concerned. The body is made up of high density polyethylene plastic tubes, bi-axially oriented, to withstand higher pressures and achieve higher velocity in place of paper crimson. The use of LDPE Power Piston with pouch in place of paper air-cushion as used in "Special" cartridges, not only provides better gas sealing but also results in achievement of higher accuracy in firing giving a very good pattern of shots. The cartridges use non-corrosive caps along with tubular anvils which eliminates occurrence of misfires. The use of smokeless propellant power give no smoke after firing and the use of hardened lead shots give a good impact on the target. The above improved characteristics make these cartridges suitable not only for use in general hunting, etc. but also for "competition shooting". Our "Astram" cartridges have already found great favour with many renowned shooters in the competition shooting games.

This ammunition is manufactured to Specn no.DGOF/128(b).

 
PHYSICAL CHARACTERISTICS :
Total length of finished ammunition after filling 58 mm
Total length of empty case 70 mm
Total mass of the ammunition 47 g
Composition of the primer A1 mixture
Charge mass of the composition 23 to 29 mg
Type of propellant smokeless
Charge mass of the propellant 1.7 to 1.9 g
Mass of the projectile (lead shots) 32 g
Type of lead shots Chilled
Hardness of lead shots 15 to18 VPN
Range of shot size presently manufactured From Biggest no.1
To smallest No.9
 
Shot No. Diameter No. of shots per 32g
1 3.63 mm 113
9 2.02 mm 652
 
PERFORMANCE CHARACTERISTICS :
Velocity at 9 m from muzzle 350 ± 15.2 m/s
Accuracy Accuracy of hit of Pellets within 76.2 cm circle on target placed at 27.4 m distance from the muzzle. with choke barrel 90% Cylinder without choke barrel 56%
Pressure Maximum permissible 3.5 TSI/ 54.0 Mpa  
 
SPECIAL FEATURES :
  • The Astram Cartridges use bi-axially oriented HDPE tubes which give highly superior quality of cases which protects the fillings inside the case form the vagaries of weather conditions.
  • The use of plastic power pistons with pouch for the expulsion of the shots from the Barrel ensures higher accuracy of hit.
  • Higher velocity parameters and use of chilled lead shots ensure better hit on the target.
     
    QUALITY :
    All components, going into the cartridge, go through strict quality checks and no deviation from the laid parameters is permitted. Important constituents of the cartridges like the cases, propellant and the percussion caps are proof tested before use in the manufacture of the cartridges. The manufacture of the cartridges in automatic loading machines in controlled atmosphere ensures uniform and highly consistent quality in the cartridges. Finished cartridges are subjected to 100% visual inspection to weed out defectives. Gauging of the cartg. lots is done as per sample plan and proof firing conducted on the finished cartridge lots to ensure quality by performance for the cartridges for velocity, accuracy and pressure as per IS-2500.

    Cartridges, so found acceptable after such stringent inspection schedule are only released in the market. No doubt, therefore, most customers prefer our cartridges only.

     
    SAFETY :
    The design and construction of our cartridges make it extremely safe to handle. Cap percussions, which pass through strict sensitivity and insensitivity tests are so assembled in the case that even rough handling do not activate the cartridges. The star crimping of the case ensure positive sealing of the cases and thus ensure complete protection of propellant from outside influence.
     
    RELIABILITY :
    Reliability of our Astram Cartridges is par excellence. Use of specially designed tubular anvils with quality percussion caps eliminates misfires which improve the confidence level in shooters.

    Strict quality checks and final performance proof on the finished cartridge lots as per laid down norms ensure high level of quality in our cartridges.
     
    SHELF LIFE :
    The Shelf life of the Astram cartridges is maximum 5 years.
     
    PACKING :
    Cartridges are packed in multi-coloured and attractive laminated cartons. 25 cartridges are packed in one carton. A lot of 20 cartons holding 500 cartridges or a lot of 10 cartons holding 250 cartridges are first put in polythene bags and then heat sealed to avoid ingress of moisture. These polythene bags with 50 or 25 cartons are then packed in wooden boxes or pre-printed corrugated fibre board boxes respectively and duly strapped with steel or plastic tapes. The packing is quite secure and lasting.
     
    STOWAGE DIMENSIONS :
      Wooden Boxes with 500 cartgs. Corrugated fibre board with 250 cartgs.
    Packing Dimensions 380 mm x 276 mm x 276 mm 336 mm x 236 mm x 120 mm
    Gross Weight 30 Kgs (approx.) 12.5 Kgs (approx.)
     
    HAZARD CLASSIFICATION :
    Explosive Classification 1.4, 2S
    Fire Fighting Classification Clause 1
     
    Contact :
    Marketing & Export Division
    Ordnance Factory Board
    Ayudh Bhawan
    Government of India
    Ministry of Defence
    10A, S. K. Bose Road, Kolkata – 700 001, India.

    Tel: 0091-33-2248 2103 / 2248 5077-80
    Fax : 0091-33-2248 1748/2210 8235
    Mail : ofbtrade@dataone.in
    http://www.ofb.gov.in