1、MILITARY SPECIE?ICATION CARTRIDGE, 7.62 NATO, TEST, HIGH PRESSURE, 60 1. SCOPE 1.1 This specification covers Cartridge, 7.621414, NATO, Test, High Pressure, 60 for use in proof testing 7.6% weapons. 2. AF?PLICABLF: DOCUMENTS 2.1 The following documents of the issue in effect on date of invitation fo
2、r bids or request for proposal, form a part of this specification to the extene specified herein. Federal Federal Test Method Standard No. i51 - Metals; Test Methods Military MIL-STD-105 - MXL-STD-109 - MIL-STD- - MIL-STD-644 - MIL-STD-1170 - DRAWINGS Munitions Command c7553703 - 7643674 - D8595430
3、- Sawling Procedures and Tables for Inspection by Attributes Quality Assurance Terms and Definittons Visual Inspection Standards for Small Arms Ammunition through Caliber .5O Visual Inspection Standards and inspection Procedures for Inspection of Packaging, Pa and Marking of Small Arms Ammunition Vi
4、sual Standards and Comparison Methods for Evaluating Grain Configuration in 7.6- Cartridge Cases Cartridge, 7.621 NATO, Test, High Pressure, 60 Classification of Cartridge Case Defects Packing and Marking Cartridges , 7,62mm, NATO , High Pressure Test, 60; Cartons; Box, Ammuniti.Cn, Ml%l; Box, Wireb
5、ound THIS DOCUMENT CONTAINS 9 PAGES. - I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL- C-46477 (MU) 2.1 DRANINGS (Contd) D8595398 - Packing an marking Cartridges, 7.62mm, NATO, High Pressure Test, 60; Cartons; Box, Ammuni- tion, M2A1; Box, Wir
6、ebound - Inspection Equipment List for Cartridge, 7.62mm, NATO, Test, High Pressure, 60 IEL-7553703 PUBLICATION AMCR 715-505 - Ammunition Ballistic Acceptance Test Methods, Volume 3, Test Procedures for 7.62 Cartridges (Copies of specifications, standards, drawings and publications required by suppl
7、iers in connection with specific procurement functions should be obtained s from the procuring activity or as directed by the contracting officer.) 3. REQUIREMENTS 3.1 General.- The cartridge shall comply with the requirements specified on Drawing CY553703 referenced specifications and the following
8、: 3.2 Bullet extraction.- The force required to extract the bullet from the cartridge case shall be not less than 60 pounds. 3.3 Residual stress.- The cartridge case shall not split when subjected to a one percent mercurous nitrate solution for 15 minutes. 3.4 Chamber pressure.- The average chamber
9、pressure of the sample cart- ridges, conditioned at 6“ to 72F, shall be 67,500 pounds per square inch (psi) plus or minus 2,500 psi. sample cartridges shall be not greater than 3,000 psi. The standard deviation of the chamber pressure of the 3.5 Function and casualty.- The cartridge shall function w
10、ithout casualty at ambient temperature. 3.6 Workmanship.- The requirements for workmanship are as specified on the applicable drawings, referenced specifications and the following: 3.6.1 Metal defects.- The cartridge shall be free of folds, wrinkles, deep draw scratches, scaly metal, dents and other
11、 defects. 3.6.2 Foreign matter,- The cartridge shall be free of corrosion, stains, discolorations, dirt, oil and smears. I t. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MI EC -46477 (MU) 3.7 Grain configuration.- The grain configurakion of the s
12、idewall of the finished cTTY ASSuRAN(=E PROVISIONS 4.1 Responsibility for inspection.- Unless otherwise specified in the contract or purchase order, the supplier is responsible for the performance of al1 inspection requiremerits as specified herein. specified, the supplier may utilize his own facili
13、ties or my commercial lab- oratory acceptable to the Government. perform any of the inspections set forth in the specification where such in- spections are deemed necessary to assure supplies and services conform to prescribed requirements . Except as otherwise The Government reserves the right to 4
14、.1.1 Quaiity assurance terms and definitions. - Reference shall be made to ML-STD-lO9 for definition of quality assurance terms. 4.2 First article sample. 4.2.1 Initial production sample.- At the beginning of regular production, a sample shall be submitted in accordance with contract requirements an
15、d shall consist of 300 cartridges. The sample shall be manufactured using the same materials, equipment, pmcesseU and procedures as will be used in regular pro- duction. the same as used for regular production ayld shall be obtained from the same source of supply. All parts and materials, including
16、packaging and packing, shall be 4.2.1.1 Examination and -Lest.- After inspection and provisional accept- ance at sources the sample shall be inspected for all requirements of the drawings and specifications at a government laboratory or such other facility specified in the contract. 4.2.1.2 Initial
17、production sample failure.- Failure of compy with requirements of the drawings and specifications sattrple disapproval . 4.3 Inspection provisions. 4.3.1 Lot. - the smple to shall result in 4.3.1.1 Submission of product.- The product shall be submitted in accord- ance With EL-STD-105. 3 I Provided b
18、y IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-46477B 13 997990b 0322207 7 W 4.3.1.2 Lot identification.- Each lot of ammunition shall be identified as to type, caliber and model, as well as with a lot number and the manufac- turers identification as as
19、signed by the procuring activity. Each lot shall be further identified by a Federal Stock Number assigned by the Procuring Agency. 4.3.2 Examination.- Examination for major and minor defects shall be per- formed on iz class basis in accordance with the classification of defects, Table I, using a;ppl
20、icable sampling plans and acceptance criteria of MILSTD-105. The acceptable quality level (AQL) for the major class shall be 0.25 percent and the AQL for the minor class shall be 1.50 percent. All non-conforming cartridges shall be rejected. 4.3.2.1 Classification of defects shall be as specified in
21、 Table I. Table I No. Defect and Method of Inspection Major Minor Visual i/ 1 2 3 4 5 6 7 8 10 11 12 13 14 15 16 3-7 18 19 20 21 24 Cartridge -I Discolored, dirty, oily, smeared Corroded; or stained if etched Mixed ammunition types Round head Dent Split case 2/ Perforated Case Draw scratch Beveled u
22、nderside of head Case mouth not crimped in cannelure Scaly metal Case No chamfer on head (rim) Fold Wrinkle Buckle Bulge Illegible or missing head stamp Defective head Defective mouth Coating missing Split bullet jacket Bullet X X X X X X X X X X X X X X X X X X X X X 4 Provided by IHSNot for Resale
23、No reproduction or networking permitted without license from IHS-,-,-MIL-C-qbq77B 13 m 777770b O312208 O m =-= MIL- C - 4647713 (MU) Table I (Contd) Minor NO. Defect and Method of Inspection Ma j or 25 26 27 29 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 Loose bllet Missing cannelure Scaly metal
24、 (bullet) Exposed steel (clad jacket) Defective cannelure No primer Cocked primer Inverted primer Loose primer Nicked ort:dented primer No waterproofing (primer pocket joint) Defective crimp Primer Gaging Total length Cartridge profile failure (requiring more than 20 pounds dead weight to insert in
25、profile and alignment gage) Diameter of extractor groove Diameter of head Thickness of head Length to shoulder datum, Depth of primer Weighing Weight, min. X X X X X X X X X X X X X X X i/ Refer to MTESTD-636 for illustration of defects 1 thru 38, with the ex- ception of Defect No. 21. specification
26、 and MIL-STD-636 concerning defect classification, the classifi- cation specified in Table I shall apply. 2/ A split in any location and with or without evidence of propellant loss shall be classed as a major defect. - In the event of conflict between Table I of this - 4.3.3 Tests.- The tests listed
27、 in Table II shall be conducted in accord- ance with the methods and procedures specified in 4.4. 5 I Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL - C - 4647713 (MU) 4.3.3.1 Test samples.- The quantities for the various tests shall be as speci
28、fied in Table II. and weight requirements shall be used 5n the ballistic tests, and shall have been selected in such a manner that the sample is representative of the entire lot. The cartridges selected shall be thoroughly mixed before being divided into samples for the various tests. Only cartridge
29、s having met the visual, dimensional TABLE II Test No. of Cartridges Requirement Paragraph Bullet Extraction 25 50 Chamber Pressure 25 Function and Casualty - Grain Configuration 10 Hardness 10 Residual Stress (Mercurous Nitrate) r/ 3.2 3.3 3.4 3.5 3.7 Drawing L/ Failure of two or more cartridges to
30、 comply with the applicable requirement shall be cause for rejection of the lot. If one cartridge fails in the initial test, a second sample, consisting of double the nWer of cartridges in the first sample, shall be tested. second sample, the lot shall be rejected. If any defective cartridges are fo
31、und in the Failure of the cartridges to comply with the applicable requirement shall Fail- be cause for rejection of the lot subject to testing of a second sample con- sisting of double the quantity of cartridges used in the initial test. ure of the cartridges in the second sample to comply with the
32、 applicable re- quirement shall be cause for rejection of the lot. 3/ of the chamber pressure test exceed the acceptance nuinber for the cumulative sample jn Table III. If the number of defects found in the initial test ex- ceeds the acceptance number for the first sample, but is equal to or less th
33、an the acceptance number for the cumulative sample, a second sample, consisting of double the quantity of cartridges specified for the chamber pressure test shall be fired. second sample exceeds the acceptance nurriber for the cumulative sample the lot shall be rejected. for which the second sample
34、is being tested should occur to the extent that they exceed the acceptance nuniber for the cumulative sample, the lot shall be rejected. The lot shall be rejected when function and casualty defects in the firing If the total number of defects in the conbined first and If, in testing a second sample,
35、 defects other than those 4.3.3.2 Firing defects.- Firing defects and acceptance number in a smple shall be as specified in Table III. i 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-J MIL-C-lC6477B (Mu) TABLE III Acceptance Number Cumulative Fir
36、st (First and second Defects Sample Sample) 1. Misfire 1 2. Bullet remaining in bore 1/ O 3. Blown primer O 4. Case casualties a. Split (longitudinal) 1 b Complete rupture (circumferential) O c. Partia rupture (circumferential) 1 2 1 - 2 1 2 No second sample permitted. Lot shall be rejected. 2f Prim
37、er not in pocket after firing and both head of cartridge case and pocket enlarged and distorted (determined visually) . 4.3 4 Packaging, packing and marking inspection. - During or immediately prior to the packaging operation, 10% examination of the cartridge shall be performed to ascertain that the
38、 cartridge type conforms to the drawing. Occurrence of any tyye other than high pressure test shall be classed as a major defect. All nonconforming cartridges shall be rejected. inspection for packagbg, packing and marking shall be in accordance with MIL-STD-644 as applicable to the drawing. 4.3.5 I
39、nspection equipment.- The examination and tests shall be made using equipment listed in IEL-7553703. 4.4 Test methods and procedures. 4.4.1 Bullet extraction.- The cartridges shall be tested in an approved bullet extractor machine. less then three nor more than six inches per minute. The rate of tra
40、vel of the test head shall be not 4.4.2 Residual stress (Mercurous Nitrate) .- The test shall be conducted in accordance with AMCR 715-505, Vol. 3. 4.4.3 Chamber pressure.- The test shall be conducted in accordance with AMCR 715-505, Vol. 3. J 7 Provided by IHSNot for ResaleNo reproduction or networ
41、king permitted without license from IHS-,-,-MIL-C-46473B 13 979770b 03L221l O . 4.4.4 Function and casua1ts.- The test shall be conducted simultaneously When testing of a second sample is required, with the chamber pressure test. the test shall be conducted in accordance with the procedure prescribe
42、d for the chamber pressure test in AMCR 715-505 Vol. 3 Section 7, using the long piston and procedure in accordance with 7.5.2.1 for fouling shots. ence pertaining to obtaining chamber pressure data shall be disregarded. All refer- 4.4.5 Grain configuration.- The test samples shall be prepared and e
43、val- . uated in accordance with MIL-STD-ll7O. 4.4.6 Hardness testing.- The bullets shall be efiracted, the propellant removed and the primers extracted. be prepared and placed on the appropriate test fixture for testing in accord- ance with Federal Test Method Standard No. 151, Method 244.1. values
44、of the sample cases for each prescribed point shall be computed and chmted in accordance with the drawing requirements. Each cartridge case of the sample shall The hardness 4.4.7 Defect penalty.- If, in the chaniber pressure test, a firing defect prevents the obtaining of a reliable result for the c
45、haracteristic being tested, an additional shot shall be fired. penalized, but the acceptance or initial production sample shall be penalized for such defects in accordance with Table III. The chamber pressure test shall not be 5. PREPARAEON FOR DELIVERY 5.1 Packin - Leve1A.- The cartridge shall be s
46、acked in accordance with Drawing D 8-GB 595 30 or D8595398 or as required by contract. 5.2 Marking and labeling.- Packing boxes accordance with the applicable drawings cited 6. NOTES 6.1 Ordering data.- Invitations for bids specify the following: shall be masked and labeled in in 5.1. and contracts
47、or orders should 6.1.1 Title, number and date of the Technical Data Package List (TDPL), for the item covered by this specification. 6.1.2 Type and level of packing. 6 .l. 3 Provision for the supply, maintenance and disposition of mandatory ballistic test equipment for acceptance inspection purposes
48、. t “ I 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-C-46477 (MU) 6.1.4 Provision for the submission of acceptance inspection reports containing final inspection results for each lot of ammunition presented to the Government. 6.1.5 Provision
49、 for the identification and submission of grain configura- tion photomicrographs prepared in accordance with MIL-STD-1170 where such submission is required, 6.1.6 Requirement for contractor to provide and maintain an inspection system in accordance with MIL-1-45208, Inspection System Requirements, 6.2 Document availability. -I_-.-. 6.2.1 Copies of MIL-STD-1170, required
