- May 11, 2017
The quote from Joe at Geoballistics below really sparked my interest. What are the different methodologies being used to account for MV variation as a function of powder temperature? Since my first love is hunting, I am particularly interested in that first cold bore shot. I live on the gulf coast, so all the data I have is at 80-100 deg F and it works 99% of the time when I'm shooting for recreation. However, I could very easily be taking a cold bore shot from a deer stand on a freezing morning in December. I use Geoballistics and am very happy with it. Should I be building a separate profile with a different MV on a cold rifle and cold ammo?
It is my opinion that real world POI shift in an extreme environment is most likely attributed to powder temp. I realize that several apps offer a tool for tracking MV vs temp, and we still don't. This is another example of filtering noise in our solver. I'm just not a fan of making a direct correlation of ambient temp to MV. There's at least a couple more steps in that process. It will work in cases, but it's not 100%. I would rather force a user to track this type of info in a log book and identify MV stability (with not only ambient temp, but also their ammo storage and carry habits) than offer a crutch that only works half the time.