Actually that is not correct. I know exactly the pressures we are running with most all the loads I have posted. I have been running pressures and load data here for over 20 years, with several different systems, including the Industry Standard by Oehler systems. We work on a 50 yard Indoor Shooting range, where computers, LabRadar, PACT Chronographs, and Pressure equipment is setup ready to use at a moments notice when required. I have run literally 1000s upon top of 1000s of rounds of Pressure tests in everything from 223 up to and including 577 Nitro Express..........
In addition to that, I have taken this same pressure data to Africa, multiple times, have hunted with this same pressure tested ammo in Africa at 115 degrees F.......... Many Times over again. And concerning hot climate, my friend, I live in the Coastal Plains of South Carolina, where July and August it gets so damn hot you cannot be outside, 110 degrees and humidity 80% or better, you walk outside and hit a WALL of hot wet air that you cannot get your breath, don't talk to me about Hot Climate. I have taken loaded ammo, left it in the hot sun for determined periods, and then tested it for high pressure, do not pretend to tell me about what pressures can be generated in hot climates. I have also taken ammo like this and put it in the freezer for determined periods to test in the other direction as well, especially when I was preparing for a trip to Russia for bear, and or Alaska.
You speak out of turn, outside your area of expertise, and presume too much.......
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There is nothing done here that is not based in science, from load/pressure data, to blending powders together, bullet technology designed and developed here, design of various different cartridges developed here, and many special projects completed here and no where else in the world............ Many shooters go out and plink cans for fun, we do science for fun..............