Slappy, I am trying to find out from Texans what powders they have found most temp stabile. I am presently waiting on delivery of the parts I ordered to build my Grendel and thought now would be the time to do this research and then find the powder on the shelf. We have more of a temperature shift day to day than most other states have so stability is more important to me than the most speed I can get from the cartridge. Will only use 100-130 grain bullets for hunting loads. Thank you, John