Temperature effect???

[Otter]

I have a 10 meter range in my basement and that is where all my equipment is stored. The temperature is 55 degrees F and 50% humidity. I have several 10 meter springers, SSP and PCP.

I have one SSP (Steyr LG 10) that shoots poorly with a wide spread and no more than 500 fps. (8.2 g pellets) However, if I bring that rifle upstairs for a few hours to warm up to 70 degrees F, it works fine...575 fps with a tight spread. All other air guns work fine without warming in the 55 degrees temp.

Any ideas??

Thanks

[kevinweiho]

You can warm up the piston seal by pumping it several times without completing the stroke. If it continues to shoot poorly, you´ll eventually need to replace with new seals to maintain tight groupings.