Firing trials were carried out on the 30 mm calibre RARDEN cannon to measure the wear rates for four different propellants and two different projectiles. The thin-layer activation technique was used for measuring the wear rate of the barrel, thus enabling wear to be measured after firing as few as two rounds. It was found that, for the same conditions, wear rates varied by up to twenty times for different propellants, while for the same propellant wear rates for the two projectiles were similar.
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