Although the test showed the Owen's capability, the army could not decide on a calibre, and it was only after intervention from the higher levels of government that the army ordered the 9×19mm variant.
Selv om testen viste Owen maskinpistolens potentiale kunne hæren ikke træffe beslutning om en kaliber, og det var først efter at højere niveauer i regeringen greb ind, at hæren bestilte 9×19mm varianten.