Shooting out of window cold weather

I have a shooting shed that I shoot bench rest out of at up to 110 yards. In cold weather, anything below 50 degrees I heat the shed to around 75 degrees since I usually shoot for a couple of hours. This causes a mirage through my scope since the length of the barrel is inside the 75 degree heat and the air out side the window may be only 40 degrees or down to the 20's. The colder the weather the worse the mirage is. Anyone else have this problem and how to cure it.
 
I shoot out of our bedroom window when it gets cold.
It helps reduce mirage if I turn on the bathroom fan to reduce the amount the amount of warm air going out the window.
I also shoot from a spare bedroom window. The mirage can be managed some by reducing the size of the opening. I use 2” styrofoam to cover the open window with a 6”x10” section cut out to shoot thru. This also helps keep the room at a comfortable temperature. Uj
 
I have a shooting shed that I shoot bench rest out of at up to 110 yards. In cold weather, anything below 50 degrees I heat the shed to around 75 degrees since I usually shoot for a couple of hours. This causes a mirage through my scope since the length of the barrel is inside the 75 degree heat and the air out side the window may be only 40 degrees or down to the 20's. The colder the weather the worse the mirage is. Anyone else have this problem and how to cure it.
I am soooo totally spoiled!
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I have a shooting shed that I shoot bench rest out of at up to 110 yards. In cold weather, anything below 50 degrees I heat the shed to around 75 degrees since I usually shoot for a couple of hours. This causes a mirage through my scope since the length of the barrel is inside the 75 degree heat and the air out side the window may be only 40 degrees or down to the 20's. The colder the weather the worse the mirage is. Anyone else have this problem and how to cure it.
Here’s what I use when shooting from a heated room in cold weather. I have also used a target that I rolled up to make a tube and taped it to the bell of my scope.
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Toughen up gentlemen, ear muffs help, lol 😂

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I've always heard practice how you play...so practice how you hunt. Props my man. In the same boat up in the northwoods. This may be a bit off topic and I don't mean to hijack but has anyone seen any accuracy and velocity fluctuations based on temperature? I just got my Airforce Texan SS CF .45 set up and of course it's now 10 degrees out.
 
If ypu install an exhaust fan on the wall ridge peak vent or a roof vent fan it will pull the cool air in through the shooting port hole and cut down that mirage in the winter, and help cool the shed in summer if need be. It only needs to be pulling a little bit of air to work, and only while actually shooting, so when reloading shut it down and build that heat loss back.up.