Fragment gun test

Fragment Gun Test (FGT). See under Fragment Gun, The FGT values for several expls are given under BRISANCE in Table 1 of Vol 2, pp B266 to B295... 

Abbreviations BMT-Ballistic Mortar Test BPT-Ballistic Pendulum Test CCCT-Copper Cylinder Compression Test FET-Fragmentation Efficiency Test FGT-Fragment Gun Test LBCT-L e ad Block Compression Test PCT-PIate Cutting Test PDT-Plate Denting Test ST-Sand Test and TT-Trauzl Test (Lead Block Expansion Test)... 

British Tests. See Physical Tests for Determining Explosive and Other Properties Vol 1 and specifically the following British tests a)Ballistic Pendulum Test, p VII b)Exudation(ot sweating) Tests, p XI c)F7 lest(Figure of Insensitiveness Test) p XII Fragment Gun, p XII d)Friction Sensitivity Tests, p XIII e)Hopkinson s Pressure Bar Test, p XVI and i)Silvered Vessel Test or Waltham Abbey Silver Vessel Test, p XXIV... 

Gun powder is also molded into several shapes. The scatter in the results from the examination of gun powder is shown in Fig. 3.98. The scatter results from the difficulty in making the test samples the same shape. Initial experiments gave an order of sensitivity of triple base < single base < double base. However, when the grains of powder were broken into smaller fragments and retested, the overall sensitivity increased and the order was single base < triple < double base. The sensitivity of gun powder depends not only on its composition by on the shape of the grains. 

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