When I decided I was going to shoot benchrest, I bought 6 second hand Smiley Hensley wind flags. I put out 4 on the hundred yard range at my club and marvel at how many times the wind can change in 100 yards. The guys at my club refer to them as "wind [bleep]" but I am convinced in their value and won't burn off ammunition without them.

"I didn't get the sophisticated gene in this family. I started the sophisticated gene in this family." Willie Robertson