Charlie Sisk,
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<br>For a fast answer call Mo at Master Class Sports in Brookfield, CT 203-775-1013. These guys shoot prone all of the time at medium to very long range with slings.
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<br>You have to practice with a sling. At first the pulse that you see with a scope will be disconcerning. I think that most of us old marksmen have so much confidence in the sling as I shot with iron sights so much and saw the results on the target.