So I have been experimenting with 22-250, 6.5 creed, and 2 different 300 win mag rifles around 0-30 Fahrenheit. And in most cases I can run 15% higher charges with no obvious pressure signs running Varget, Superformance, 4350, 4831sc, and Rl23. For example I can run 79 grns Varget behind 110 vmax .020 off lands at 3950 fps with only slight ejector marks. And 79 grns 4831sc behind eldx 212 .015 off lands at 2980 fps with no pressure signs...are the powders getting better or what? Same with my creed...I have seen over 3000 fps with 129 gen bullet when cold. Or is it the lack of humidity when it's so cold that helps velocity?
Cold weather, am I crazy?
- Thread starter CJS-6.5
- Start date
I would certainly proceed with caution if you are working up max loads even with the temp stable powders in cold weather. I have allways worked up to max in 90 plus heat when possible to give myself a realistic safety factor.
Yes, you are crazy. Ejector marks mean you are way over pressure, and brass is flowing. Your pressure signs will show up when you are throwing away all your brass that wont hold primers anymore.
Actually, the less humidity, the higher the atmospheric density and cold air has an even higher density.
I know it's counter intuitive, but Tiberosaurus Rex has a video and he shows his math.
I had only heard about him from members here, I tried watching a couple of his ME tube videos but never made it through to the end of any of them. To dramatisized for me though he does seem to have a following I'm just not one of them.
I get my entertainment from the Bear Pit threads and the occasional Budlys that pop up from time to time.
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