I found a very lightly used Remington 700 VSSF in 308 Win. I could not, for the life of me, get it to shoot sub-MOA with Varget/165 NBT. So I tried 43 grains of 4064, and bingo, bug holes(5 shot groups)!
I've read that 4064 is temp sensitive. Now, my problem is that I worked this load up yesterday, at 90 degrees in east Texas. I am taking this rifle to northern Michigan, where the temps can be 0-65 degrees in November!
I need to know if I'm still going to have an accurate load in the cold weather. Has anyone ever put a few cartridges in a freezer, then shot a group to find this out? I want to check the change in velocity, and POI. Will this work? I will be testing in my back yard, and the cartridges won't get much of a chance to warm up. Thoughts??
I would not worry about it. Just check zero as others have said.
I routinely zeroed rifles in 60-90 degree weather here then hunted in Saskatchewan, Manitoba and Alberta in temps that stayed 0 to minus 20 through the day. Rifle and ammo were always outside and "frozen".
I never missed a buck because of it.
