I recently purchased a Bartlein barrel from Whidden. Fit, finish and chambering is A++, all round great experience from discussions, ordering and delivery. I tried 4 different kinds of ammo in it that I had on hand. 1 Eley, 2 different SK, and Norma Tac22. SK Rifle Match was the winner by far. I then installed the Harrell Tuner that I ordered for the barrel and worked out a setting. I’m new to using a tuner on a .22lr and am wondering if or how much the tuner setting changes with temperature. When I shot, here in Ohio, it was 27deg. If it changes how much can weather(temp,humidity etc) change before the load goes out of tune and is there a way to predict/anticipate it by the group shape or impact shift?