Search:

Yep agree with you there Dave about the effect of air pressure on the trajectory. Just wondering if some of the muzzle velocity increase at higher temp is also coming from the redcution in air...

How about this, how does the air pressure effect the muzzle velocity? Does it have any effect. My first thought is that a lower air pressure (higher air temp) would give a higher muzzle velocity...

Greg Duley did a powder temperature comparison a few years back. Some powders were definitly worse than others.

Not quite Dave, 11 celsius = 51.8F 25 celsius = 77F so only a 25.2 F change x 1.5 = 37.8 fps change.

The celsius to fahrenheit conversion is not constant across the temperature range -40C and...