These photographs show the
firing sequence of a black powder .577 Enfield percussion rifle during chronograph testing
of loads used. It is absolutely vital for us not to exceed the maximum muzzle
velocity and energy specified in our Range Safety Certificate and due to the
highly variable nature of black powder, testing is necessary. With metallic
cartridges, the ballistic properties are specified by the manufacturers, but as
every load of black powder is made up individually, the firer must gain
knowledge of what is safe by direct measurement.
The chronograph used by
the club can be seen mounted on a tripod in front of the firer and contrary to
what might be imagined, it survived the tests unscathed. The large amount of
smoke and dust produced when firing black powder means that it is necessary to
have both good range ventilation and to keep the floor clean so as to avoid a
build up of debris. The range floor needs to be washed with water on a regular
basis, as this neutralises any powder residue.
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