Re: Problems with 300wsm groups
This is a small sample size. But, it illustrates a trend that I've often heard about temperature stability being better in the Hodgdon Extreme powders than others...
I just now eyeballed some averages from my records...
Sendero 7mm Rem Mag
98F = 2640 fps = -308" @1K
34F = 2550 fps = -331" @1k
92F = 2765 fps = -277" @1K
86F = 2750 fps = -280" @1K
79F = 2740 fps = -283" @1K
34F = 2720 fps = -287" @1K
These are relatively light loads with 180g Bergers I worked up for my young son.
Again, this isn't scientific. But, it seems to hint at one reason some powders are more popular for competition than others.