I got the table from Predator Masters website and don't have the original source. All you have to do is Google up temp sensitivity for powders. The "50˚ and up" comment means the powder burn rate is non-linear under that temp so the estimate of 1.52 for RL15 under 50˚ is not accurate.That's a mighty cool looking table. Do you mind if I ask where it comes from, who generated it and how? Also what the two columns mean? I see the right side says something about 50 degree and up so left side is a larger temp range and right is moderate to high temp?
looks like the thing to do is just hold out for more h1000, maybe try re 23 if I stumble over it and if I cant find anything in time for my october hunt I'll set up a load for re 22 or retumbo and test it I'm temps that represent what I expect to see in oct.
If you know the temp, you can enter that into your ballistics calculator via a MV/TEMP chart as a starting point. Then see what you get on the range. I'm not recommending a particular powder here. Just trying to help ppl understand the importance of factoring in burn rate over temp. If you know that, I think it helps a lot at long range under large temp variations.