Temperature effect on tuners?

[jsof]

I haven't seen this addressed anywhere else, but if it was I apologize.
When I went to the range recently, the temperature was about 45 degrees colder than the temperature was when I did my tuner set up and found the setting that helped make my groups shrink to their best size. I quickly notices that the ideal setting seemed to be a little bit different, so when I got home I looked online and the only reference I found said that commonly as the temperature decreased, the best tuner setting would move the mass of the tuner slightly toward the chamber end of the rifle. This is the opposite of what I found on my rifle that day!
Has anyone else found they needed a small adjustment which makes sense to me due to the change in barrel vibration at colder temps, and which direction did you find necessary?

 

[rijndael]

which makes sense to me due to the change in barrel vibration

And just to expand on that, powders tend to lose fps with a drop in temp, and gain fps when it increases. It's like add or removing powder while keeping temperatures contant.

 

[Hi-NV Shooter]

I haven't seen this addressed anywhere else, but if it was I apologize.
When I went to the range recently, the temperature was about 45 degrees colder than the temperature was when I did my tuner set up and found the setting that helped make my groups shrink to their best size. I quickly notices that the ideal setting seemed to be a little bit different, so when I got home I looked online and the only reference I found said that commonly as the temperature decreased, the best tuner setting would move the mass of the tuner slightly toward the chamber end of the rifle. This is the opposite of what I found on my rifle that day!
Has anyone else found they needed a small adjustment which makes sense to me due to the change in barrel vibration at colder temps, and which direction did you find necessary?

Joe, retune in the cooler temperatures the setting you find will be good for when it gets warmer. also is this the Vudoo? you were at 35 on the setting with the lite tuner, how far out did you go?
here is a good example, my M12 project 33 degrees shooting 4 random lots of CX and Pistol King. tuner is at 90 and hasn't been changed since last February.

good to see you shooting again!

Lee

 

[jsof]

Lee,
The Harrel has a new home on my CZ, and is set at 10. The improvement was so great that I bought a new tuner for the Vudoo which is a PDT (he sells a threaded model that screws right on the existing threads) set at 0, but in the 30 degree weather it shot noticably better at just below 2. Yesterday, at 47, it shot tighter at about 3/4.
I've been shooting all along, but lost your email address and didn't know where to contact you.
Gotta love those individual bulls. They really show your flaws.

 

[Hi-NV Shooter]

Lee,
The Harrel has a new home on my CZ, and is set at 10. The improvement was so great that I bought a new tuner for the Vudoo which is a PDT (he sells a threaded model that screws right on the existing threads) set at 0, but in the 30 degree weather it shot noticably better at just below 2. Yesterday, at 47, it shot tighter at about 3/4.
I've been shooting all along, but lost your email address and didn't know where to contact you.
Gotta love those individual bulls. They really show your flaws.

Hey Joe, I sent you a PM with my contact information. but getting back to cold temps. I too had to go out on the setting the first time. from 48 to 90 which is where it still is at. yes, shooting a group is one thing but shooting at a single bull is another. FYI, a week after I shot that target the same rifle in cool, upper 50's -low 60's temperatures in a very brisk wind got the win for me, same tuner setting of 90

Lee

 

[jsof]

All that science and sometimes we still stumble upon the best things!

 

[Hi-NV Shooter]

All that science and sometimes we still stumble upon the best things!

There is a science to this? I live in Las Vegas I am used to rolling the dice and trying my luck! and with rimfire that's about as good as it gets

Lee