Originally posted by xlcc
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CFE223 true to its word.
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Originally posted by pajasonc View Postwhat about temp sensitivity. I am tempted to try this powder as it would work well in both the 6.5 grendel and 308 but I worry if I work up a load at 40 degree's it will be over pressure at 70 and if I do it at 70 and hunt in 20 degree's my zero will be way off? I have read from a couple sources that its 1.7 fps per degree in change for cfe 223, thats a lot more than say 2000 mr which is just under 1 fps per degree.
Put 3 rounds in a cooler with ice in it, 3 rounds sitting in the sun on a 60 degree day with no wind, three more sitting in the shade and you will get 3 very different average velocity readings.
I've already experienced this with some rounds at a rifle match. I had a magazine loaded with the 6 rounds that I needed and sitting in my dump pouch with my back to the sun (so was the dump pouch). I was the last one to shoot that stage and when I grabbed my magazine, it was pretty darn warm for a 65* afternoon. I was hitting high on all the shots past 500, where the stage before I was on center with ammo freshly pulled out of the insulated depths of my backpack.Sticks
Catchy sig line here.
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