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Police say a 50-year-old man who’s a family friend of the girl was trying to holster his 9mm handgun at a range table and accidentally discharged it.

A systematic exercise is given here of the compilation of a range table by calculation with the ballistic table; and it is to be compared with the published official range table which follows.

This muzzle velocity is about 5% greater than the 2150 f/s of the range table, so on these considerations we may suppose about 10% of work is lost by friction in the bore: this is expressed by saying that the factor of effect is f = 0.9.

Thus the cordite, size 30, of the range table has been squeezed through a hole 0.30 in. diameter.

In the heading of the 6-in. range table we find the description of the charge.