[3] The full metal jacketed round was used in cadet rifles in Australia and New Zealand after early 20th-century Defence Acts.

After being sold by the Australian government many were converted to sporting or target rifles, often re-barreled to calibers like .22 Hornet, .218 Bee, .25-20 Winchester, .222 Rimmed, .357 Magnum and others to .22 rimfire by gun makers like Sportco.

Modifications involve length resizing, and in most cases reducing the rim thickness.

Due to the .310 using a heeled projectile, the neck thickness of the .32-20 does not have to be reamed down, after first being case length resized to 1.075" (27.3 mm).

However, in the unusual instance of a lever action .32-20 fitted with a .310 barrel, the rifle will cycle better without the case rim thickness being reduced.