Aweosome Brian, this is a lot of fun!
Seems to overestimate windage req'd at high power though (eg 0.033/18.1gr JSB @850fps)
If you want I can map out an NZ club course, just for fun. Will be windy though!
"Astrid" - Steyr LG110FT / Falcon T35S
"The Bangstick" - Falcon FN19 .25 FAC / BSA 8-32
Too many tinker projects, not enough working rifles.