I'm looking at getting a turret from Kenton Ind. for my 30'06 and my gun is shooting great with a 150 gr. Hornady but it is only shooting 2800 f.p.s. at 90 degree's F. Doe's anyone have an educated guess at how much velocity I will lose when the temp drops to the mid 30's.I want to be able to adjust my load by powder charge but can only get about another 100 f.p.s. due to case capacity.If you need more info just let me know.