With the nothing over .38 rule it mainly appies to Pistol Clubs the exceptions are
Black Powder
Metalic Silouhete (forgive the spelling)
SASS
Collectors (class 2)
Security Guards (I do not think a Howdah in .577 Snider would be main issue of a security company somehow!)
Gundealers

and any special reasons like film armourers, Defence contractors, etc. All above on approved ranges but you can apply to the police for a exemption for use else where but seldom given. All above is for Victoria other states would be very similar.
RLI