wondering if anyone has checked their fps in really cold conditions [5 degrees]. Just came back from range and the labradar showed 20fps deviation,but when in 50-70 degrees it is less than 10. Is this normal?thanks Stan
deviation in cold .....5 degrees
- Thread starter Ruslow
- Start date
Comparing small sample sizes often gives unreliable data.
When it's colder, all rounds will be slower. When it's warmer all rounds will be faster. With large samples, the standard deviation and extreme spread should be similar in both.
In the cold my SDs tend to be a little higher but not too crazy. Fps drops is about 1fps per 2 degrees.
It's normal for the SD to increase with colder temperatures. I have shot 22LR in temperatures down to -30 degrees Celsius. Some ammo is far more sensitive than others. SKLRM is one of the worst in cold temperatures. SD's could go to 30+ in colder temperatures.
You can mitigate this somewhat by using biathlon ammo like SK Biathlon or ELEY Match Biathlon, depending on the temperature.
Eley ammo seems far less temperature sensitive that some Lapua or SK products.
You can mitigate this somewhat by using biathlon ammo like SK Biathlon or ELEY Match Biathlon, depending on the temperature.
Eley ammo seems far less temperature sensitive that some Lapua or SK products.
Yes, my experience has been the same, aside from the first shot. I run my Garmin occasionally during the day as the temp rises and velocities increase.
I keep my boxes of ammo and loaded mags in inside pockets at those temps. It is unscientific, but the it helps.
