[ShelledPants]

Originally Posted by Fox62

I know, it depends a lot on gun and mags as I said earlier. But I'm just not convinced about heat and cold affecting FPS of the gun that much. We have temperatures as high as 40ºC in the summer, and as low a -5ºC in the winter. I haven't chronoed in those extremes, but I've chronoed in 35ºC, and say, 5ºC, and the FPS have been very similar (they did vary a bit, but not dramatically). Maybe it depends on the system as well? My main gun is a precision gun, so I've done extensive testing, but the other GBB's are all "grunt" guns.

To the OP, I've tried Propylene and I've hated it. If you can avoid it, do. If you find that your gun runs well on it on winter and is just not gameable on propane, well, you don't got much of an option.


Fox.

I've got a test for your WE Scar.

Fill the magazine. Take the gun and leave it at -5C area for an hour.

Switch to auto and pull the trigger. It WILL fail to fire all 30 rounds.
(Easy mode test. Fill the magazine. Put it in the freezer for an hour. Remove and fire immediately. It will fail.)