Tried to shoot the challenge while load testing!!!! Trying out some Varget, TAC and Ar-comp with 55 SBT's (Sierra) in my new upper (16" Aero Precision) TAC put up no decent groups but Varget and Ar-comp did pretty well. Will have to look closer at them!

looking downrange
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My new lover
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looking back towards the benches
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bottom right corner is a near max load of Ar-comp.
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and the Varget loads (26 & 27 grains di well)
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Just getting back to shooting after many long years of health troubles. Hopefully more to follow soon!!!
I shot this for fun so you don't have to count it since I used my old benchrest for support.

Proper prior practice prevents piss poor performance!