I was in the same boat years ago trying to find a place to shoot at a target its bloody hard when you live in town (and a townie at the time) but was lucky enough back then to find a place through a flat mate and then when i was in the trade a guy i got to know dad's managed i block ten minutes out off town so worked out sweet for a while.
When you find a place just remember don't take mates that will ruin it for you. Rubbish falling out of the car, driving across that wet paddock etc etc.
Good luck
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