Way back in the 80's when I went to Whatwhata , I can still remember shooting an Omark aperture sights in those day's I had at 1000yds, was a coached shoot where he put on 1 min of angle for the barrel twist, then maximum windage, I think it was 24 mins for the strong wind. Told me when to shoot and when to wait. Got 2 centrals in those conditions. Was really impressed as I was C grade and would have never even got a hit in the frame of the target by myself, still can't read the wind well.
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