I have done in previous years both the two day and five day long range training courses with Precision Shooting (precisionshooting.com.au) and have found the training to be excellent both instructors I have had over the time were brilliant, both with backgrounds that allow them to teach with you secure in the knowledge that hey know what they are talking about. Glen the head instructor is still active in his "day" job which allows him to do much testing of the projectiles, firearms, ballistics and alike for getting the most for long range accuracy.
Highly recommend the training they provide for anyone in Australia or New Zealand