30. Ammunition sales
(1) The holder of a Dealer’s Licence may dispose of ammunition to any person who represents himself as being the holder of a licence or permit under this Act entitling him to possess a firearm and
ammunition or as lawfully possessing a firearm under the provisions of section 8, and who the dealer believes on reasonable grounds to be entitled to possess a firearm suitable for use with that ammunition, or as being the holder of an Ammunition Collector’s Licence.
Definition of 'ammunition' varies around this nation....;
ammunition includes anything manufactured specifically as a component of ammunition designed for discharge from a firearm and also includes any primer or propellant manufactured specifically for use in making ammunition designed for
discharge from a firearm but does not include ammunition rendered inoperative for the purpose of a collector’s item;
So shot according to the above is ammunition in WA (

) whether dealers stick to this technicality, probably do.
If you have a cat A/B you should be good....you shouldnt need a firearm registered, just your Lic.