Re: Handloads & Extreme cold Temps
Some powders are temperature and position sensitive...If I recall correcrtly, 99% of them are pistol powders. I believe H335 is as well. If I can locate the list I have, I will list them.
A general rule of thumb is that extruded powders are less sensitive to temp than ball, flake, or even smaller grained extruded. Winter hunters like IMR4064, which cares little about temperature.
I quite often find that loads I developed in hot or humid weather will change POI in cold or dry weather. I usually develop my hunting loads in the winter, and target loads in the summer. Most don't change much, I may lose 100 fps or drop 2" at 100 yards. If you can, resight your rifle just before you hunt(it should be done anyway).
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