How much does colder temperatures affect the velocity in pellets in your pcps. Wat sort of drop in FPS should I expect? ??
Thanx
Thanx
velocity changes
- Thread starter drid
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I ask the same question on GTA. The way i understood the replys temperature had very little affect on velocity. I might shoot some latter today to see if there is a difference between 60 degrees and 45 degrees. Gun is in the outbuilding cooling off now. How cold are you talking about?
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Going from indoor to outdoor recently, so 68F to maybe 50F or a bit below, I was losing around 20fps and have noticed this before and more.
I heard it said on a youtube vid that it's to do with grease and lubes from factory assembly in the gun getting thicker in the lower temperatures... but I'm not sure in a PCP exactly where the grease is that's causing this - maybe in the hammer spring or valve stem? I am pretty sure that the inside of regulators are supposed to have some lubricant in them but I'm sure someone knowledgeable here could tell us.
I heard it said on a youtube vid that it's to do with grease and lubes from factory assembly in the gun getting thicker in the lower temperatures... but I'm not sure in a PCP exactly where the grease is that's causing this - maybe in the hammer spring or valve stem? I am pretty sure that the inside of regulators are supposed to have some lubricant in them but I'm sure someone knowledgeable here could tell us.
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After 4 hrs at 45 degrees i shot 5 more shots. The highest velocity was 7 fps slower than any of the 5 shots at 60 degrees. Not very scientific but it appears temperature does have some affect on velocity. The video showed that real cold has a lot to do with velocity loss.
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I have noticed a difference when shooting your pcp in extreme temperature changes. I have noticed gun both my matador and my cricket left outside for two hours in 20 degree temps vastly slows down the pellet. On the other extreme, I left my matador in a 110 degree room and noticed my POI was higher.
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Admittedly changes of frictions and dilatations depend not only of temperature but also of used materials ( of pallets, lube, barrel, valve, spring ,…… ) . Therefore to find out exact change of FPS/temperature is not easy.
What`s about to say 10%-FPS per 40 degree ?
What`s about to say 10%-FPS per 40 degree ?
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My gun was shooting an average of 820 fps, now I did a test with ten shots and it's soothing 801 fps, temperature is 25F
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Metal shrinks in the cold and everything gets tighter plus any moisture at all is now ice
I would bet if you got super cold the gun would not fire at all.
I would bet if you got super cold the gun would not fire at all.
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