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280 AI ultralite cold bore shot issue

I have but never this severe.
I had one that severe. It was a pencil thin barrel. Always threw the first shot 1.5 moa off and nothing seemed to fix that. After the warm up shot it shot incredible groups. Since it's only suppressed when you experience it, it's got to be the weight of the can either bowing your barrel or adding some stress that goes away when it's warm? It will be interesting to see if you can eliminate it.
 
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