Temperature / MV trends for RL19 powder

PrepareSmarter

Private
Minuteman
Feb 10, 2019
73
38
I'd like to verify my Temp/MV data and get some feedback on my powder choice.

300WSM
24" Tikka #2 barrel 1-10
Hornady brass
Federal match primers
RL19 @67±0.02gr
175gr SMK @2.900" COAL 0.015 jump (magazine limited until recently)

Right now I'm seeing around 3.7FPS/°C or 2.06FPS/°F with RL17. This seems like a lot!
I'm looking at the H4350 more and more over time.

Numbers shown are MAX, AVG, MIN on a 5rd string at each temperature. Ammo temperature was recorded in the magazine, heat soak was limited to 1-2 seconds in the chamber.

Spring 19
LOG 1
Temp (°C)​
MV (FPS)​
33.9
3023.0
33.9
3017.4
33.9
3006.0
27.2
2990.0
27.2
2965.9
27.2
2933.0
23.3
2972.0
23.3
2948.6
23.3
2922.0
22.0
2965.0
22.0
2940.0
22.0
2938.0
8.3
2934.0
8.3
2922.0
8.3
2908.0
 
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