Thread: Velocity Loss From Summer to Winter.

Really keen to hear from more experienced shooters:

I'm using AR2213sc in a 6.5-284, 50.5gn pushing 140 Bergers at a lesuirely 2900fps.
-Worked this load up last summer (20-23 degree days), it was pretty consistent velocity wise.

-Based on observed drop at targets last weekend (8-11 degree day) I think I'm seeing about a 90fps drop off. (Worked it back through JBM calculations, will chrony it tomorrow...if the bloody rain stops).

I think AR2213sc is supposed to be pretty stable temperature wise.

So, 90fps loss for a temperature drop of 10-15 degrees???? It's a drop off of only about 3% (which I guess doesn't sound that much), but it makes a good dent in my trajectory beyond 300 yds


So, does this sound right? Or am I getting too much drop off?

Thanks for your help.

Ps. Has occured to me that increased air density/humidity will be a factor too, but I ran the numbers- and it didn't seem significant enough....but then again, I am a real amateur