Impact at 38 degrees f.

[Sal]

Has anyone been out on a cool morning yet? I live in northern MN. At the range.it was cool this morning. 38 degrees. F. My impact dropped 100 fps, back to normal in garage after warm up. Any ideas or experience would be appreciated. Sal

 

[gamyrick]

I should have read your post more closely. It clearly states"fps" but I was thinking cylinder pressure. My apologies.

 

[I_Like_Irons]

"gamyrick"There's nothing wrong with your gun. Warm air is less dense than cold air, so as the air cools the pressure lowers and as the air warms the pressure increases.

This is true, but the Impact is regulated, so there should not be a pressure difference.

In my experience with a couple of completely different rifles from the impact, the decrease in velocity in low temperatures was due to a slower hammer strike. The lubricants thickened in the cooler weather and slowed the hammer. By changing to a dry lubricant, this effect was minimized.

 

[Sal]

Thanks for the input gentlemen, the folks at AoA seem to agree on the lube issue, stated that had to be much colder to affect the velocity. Thanks again for your time.
Sal