Brocock/BRK Can moisture in a PCP affect accuracy?
- By JimD
- PCP Airguns
- 19 Replies
When a gun starts shooting differently it's always a good idea to get out the chronograph for more information. When air expands it cools. Even dry air. But for air with moisture in it the moisture may come out as water because of the reduced temperature. Condensing the water out will take energy further decreasing the temperature of the air. So I think it is reasonable to assume your velocity will be lower under these circumstances and the POI may change (usually down but not always). If you think you may have a not insignificant amount of water in your gun you should degass it and check. It won't help anything and could result in damage.
GX has an add-on filter now you could use on your CS4. Or you could just get an additional filter filled with dessicant. Doesn't have to be huge. That's what I do on my YH that fills my 45 minute Scott tank. I just opened my 3 year old P35-22 recently for the first time and it was dry inside. Nice confirmation what I am doing works. I've opened the others recently too and none show water or signs they ever had water in them. You may not need the additional filter all the time. I remove the absorbent filter that came with my YH after every bottle fill and in the winter it will not have any water in it I can squeeze out. But in the summer it sure does. It is my first stage filter to get moisture but also any oil. Then comes the dessicant to get any remaining water.
GX has an add-on filter now you could use on your CS4. Or you could just get an additional filter filled with dessicant. Doesn't have to be huge. That's what I do on my YH that fills my 45 minute Scott tank. I just opened my 3 year old P35-22 recently for the first time and it was dry inside. Nice confirmation what I am doing works. I've opened the others recently too and none show water or signs they ever had water in them. You may not need the additional filter all the time. I remove the absorbent filter that came with my YH after every bottle fill and in the winter it will not have any water in it I can squeeze out. But in the summer it sure does. It is my first stage filter to get moisture but also any oil. Then comes the dessicant to get any remaining water.
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