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AR15.COM
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3/25/2013 8:08:31 AM EDT
Is this powder temp. sensitive?

Thanks...


-ZA
3/25/2013 9:32:42 AM EDT
[#1]
I can't say for sure yet, but I will have data within the next few weeks.  My gut tells me that it is, since it's a ball powder, but I don't have evidence yet.

Here is a 20 shot chrono string of 25.2gr under a 69gr SMK.  Temp when it was shot was 21 degrees F.

                      1)2701.0  -7.2
 2)2715.0   6.8
 3)2716.0   7.8
 4)2700.0  -8.2
 5)2726.0  17.8
 6)2720.0  11.8
 7)2722.0  13.8
 8)2733.0  24.8
 9)2702.0  -6.2
10)2722.0  13.8
11)2712.0   3.8
12)2720.0  11.8
13)2706.0  -2.2
14)2694.0 -14.2
15)2699.0  -9.2
16)2713.0   4.8
17)2693.0 -15.2
18)2719.0  10.8
19)2677.0 -31.2
20)2674.0 -34.2

High:2733.0
 Low:2674.0
E.S.:  59.0
Ave.:2708.2
S.D.:  15.3
 95%:  ±7.5
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