Thread: Velocity Loss From Summer to Winter.

Scribe put simply the ambient temp makes the powder warmer or cooler. Warm powder will burn faster than cold powder creating more pressure which intern creates more velocity.There are plenty of variables involving powder types,double base vs single base, burn rates,etc, I personally think barrel and chamber temp has an impact as well but its not something Iv given a lot of thought to. Some people (including myself) carry their ammo in a pocket close to the skin to try and keep it close to body temp in cold conditions, it helps.