Tuning Impact MK II does NOT like freezing Temps

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Strobing_NYC

Member
Sep 7, 2018
54
1
NY, United States
I use my Impact MK II for nuisance Wildlife removal which happens @ all times of the year not just regular warm temps. I went out the other night to site in a new thermal scope for Beaver removal and it was shooting way slow, I didn't have the chrono on it but just from the sound alone and the impact of the slug it seemed to be shooting around 150-200 FPS slower than normal which is 940. 

The only thing I can think of is to much silicone on the reg disks? Anyone have any thoughts on this issue of mine? Does anyone else have the same problem as I do? 
 
Dude it's freezing out and my fingers don't last that long geez! Plus this is how I found the issue, by sighting in while it was around 34° out Seriously though someone with some technical knowledge has to know the science of it, 

2 things I got would be air cooling in the plenum and not having to same "charge" as warmer air. 

To much silicone on the reg disks 

However I feel it is more related to the air temperature is self. This also has to be something others have dealt with, we all don't like in the south where it's warm all year.

Go stick your impact in the freezer if you don't live up north and tell me yours shoots and sounds just like it does @ 44° even. It's when it's down to freezing Temps and the sun is down so everything instantly freezes over. 
 
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Your tank would go down from say 3000 psi to say 2400 psi same effect as CO2 just not as bad as CO2 colder it gets the less speed you'll get say you set your gun up in 70 degree weather with 1900 psi from the reg air gets colder it becomes denser lowering your pressure .works opposite to fill your tank to 3000 psi in freezing weather come inside with the gun and you pressure goes up as tank warms up and could be over pressured like said it's a good idea to sight in in temps that your going to use it in because you'll lose fps I don't know really how to explain it that well 
 
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The forces at play in a regulator's Belleville stack don't care about an increase in lubricant viscosity.

However if there is any wet lube on the hammer, that will do it. A dry burnishing of graphite, molybdenum disulfide, or tungsten disulfide is better for the cold.



+ 1 Finally got an answer from one of the Tier 1 guys here!!👍
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What do you mean air pressure? Yes the tank will expand when hot and go down when cold. I believe all PCP with a tank would be tempature sensitive in that regard.
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All PCPs ARE temperature sensitive. Temperature and pressure are closely related. For any given device (including your car tires) pressures will fall when temperatures fall and rise when temperatures rise. The extent to which this is true depends on the gasses involved. CO2 is much more sensitive to temperature changes than Nitrogen, for example, but they all follow the same rules.

This is the whole basis for refrigeration!
 
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