Actually I wouldnt agree (depending on where in NZ you are) on that as NZ's sun gain at 41 south latitude v air temperature can make a huge difference. Parts of NZ (wellington for instance) is the perfect place to use passive cooling techniques in buildings as we have a high solar gain but a low air temperature in comparison. Even placing a round at outside air temp in a hot chamber can make a difference.
Now you have mentioned it Iit reminds me to test my new thermometer on rounds in and out of the sun to see what the difference is. I will also try and get a temp on a barrel on Saturday after 12rounds of 308.
regards
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