jmorris
Member
- Joined
- Sep 30, 2005
- Messages
- 24,280
GW, they look for the shadow of the bullet passing over and can detect quite a way above the sensor. This is the smallest "window" I have ever shot at with either of mine.
The only reason I did that was because it was dark and I wanted the numbers. Because the sight height is above the bore, I aimed just the cardboard and the bullet went just below to be measured.
If you are worried about destroying the plastic screens wait to chronograph on a cloudy day. You don't need them then as the clouds are sufficient by themselves.
The only reason I did that was because it was dark and I wanted the numbers. Because the sight height is above the bore, I aimed just the cardboard and the bullet went just below to be measured.
If you are worried about destroying the plastic screens wait to chronograph on a cloudy day. You don't need them then as the clouds are sufficient by themselves.