Some old man at the range once told me "Two types of rifle: shot alot & carried a little vs. carried alot & shot a little". A hunting rifle is usually light with acceptable accuracy and a target rifle is heavy with accuracy due to a heavy stiff barrel.
Since you did state .308, an excellent...
PRECISION RIFLE SOLUTIONS, LLC
This is what I bought for the same purpose, but since my 1600 CRF has been delayed I'm not sure how well it will work. It was made for the LRF, but for that price, I will modify it myself.
According to the Army field manual 23-10:
"The higher the temperature, the less dense the air. If the shooter zeros at 60 degrees F and he fires at 80 degrees, the air is leas dense, thereby causing an increase in muzzle velocity and higher point of impact. A 20-degree change equals a...