Did.
Ruger Super Redhawk in .454 Casull was the big one, also a .44 Magnum.
I scoped the Super Redhawk for him and sighted it in. Glued the scope mounts on with High Strength Loctite and they held up perfectly during the sighting-in and subsequent fun-shoot. The next time I saw it, a few months later, a client had requested open sights so the scope had been removed! That revolver will still be recognizable by the remnants of red Loctite on the top-strap!

The NT situation is interesting. An Occupational Firearm Licence may be granted for handguns (H-class) if the applicant can demonstrate genuine need, ie a long-arm is not practical or cannot reasonably be used. Its definitely not a given, though.

Also, a permit to use a handgun registered for another purpose, eg club target shooting, may be granted for a different purpose under certain circumstances.

It was much simpler before the post-Port Arthur apocalypse:
If a handgun owner had written permission from a land-owner and a letter of support from his pistol club, then he would be granted a permit to hunt with a handgun.

The good ol' days!