used it for years, especialy on deer rifles, my 7mm stw is sighted in as follows
100 +2.3"
200 +3.6"
300 +1.4"
400 -4.9"
500 -16"
so at 100 yards I hold for a heart shot, same for 200,300 I hold middle shoulder, 400 I hold upper third of the shoulder, and at 500 yards I hold 10" over the back with the verticle wire in line with the offside leg. have taken deer to 626 yards with this rifle.
works the same way with varmint rifles except your range is less due to a smaller point blank window for varmints.
RR
