Raudy- what part of the 707 are you in? I feel your pain with the summer temps. It was 117 in Middletown last A zone. I haven't loaded my 300 wby with the 7828 ssc but have great luck with RL23 and Barnes 200 LRX.Right on! Yes, I always test all my loads in late spring and summer here so its "hot" over 80 degrees. Never do I push things to ragged edge or use compressed loads. Ideally I'm at 95% of max. I just don't want to neuter a 300 Weatherby. I will use other powders and I have a bunch of lead free bullets in different weights to play with as well. I also have 212 eld-x and Berger 210 grain bullets on hand. Should be fun.