Benchrest 100yd 5x5 Challenge Inspired by Franklink

[Billm]

Its a possibility your just supposed to snug the nut but if its against the sleeve and not the barrel it would account for the circular motion. I got this from strelok it a 1.3” target gun zeroed at 100 and the red lines are for a 2-5-10 mph hold off.
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Yeah, I agree the wind drift is a definite factor. It’s not a consistent wind speed. Are you referring to the liner? I’ll take a look.