Originally Posted by BENNYBOOBOO
Does anybody adjust their charge weights in accordance with the temperature in order to maintain bullet speed?
Trying to get ideas of what to look for in future experiments.
I've seen greater variation from 80-120 degrees than for changes below 80degrees.
However, in cold temps (around freezing and lower), some powders don't like to ignite very well and can require a magnum primer, or even a change to a different powder. An example of this is Varget, which I've had great luck with unless it was very cold (300 WSM was the cartridge).
Another example is the drastic changes that cold weather can have on reduced loads. I used to do a lot of Cowboy Action Shooting and used .357's with extremely reduced loads (Clays, Solo 1000, VV N320 etc. powders). I used an extra .2gr in loads that where intended to be used in freezing weather, because of hang fires and dud's. With a little more powder, I never had the problem. I was using around 3gr of powder behind 125gr bullets.
I've seen the same thing with reduced loads in Shotgun loads.