i have the same thing going on with my big cat. 95% of the time its perfectly dead on at 10meters. the other 5% of the time it flies 1-1.5 inches off the group. i've tried all kinds of pellets(rws super and H points,jsb predators, beeman silverstings, beeman crow magnums, crosman sharps, gamo hunters, etc....)and the only ones closest to perfect is the gamo rockets and second is the cphp's.
i think the rifles barrel is too light or something. i can definitely feel the front wanting to wander, even from a bench. i crowned the barrel and it didn't seem to matter.
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