I ask the same question about three years ago, so I am hoping someone might have used one since then and is capable of commenting.

Has anyone ever used a MagnetoSpeed Ballistic Chronograph with their double rifle?

It is barrel mounted; directly strapped on the barrel of the weapon, with the sensor hanging out in front of the gun.

http://www.magnetospeed.com/

All I am looking for is a velocity and not interested in its effect on accuracy.

Michael Dittamo
Topeka, KS