Quote:
Originally Posted by drover
Hint #2 - If you happen to have a Cooper that is not grouping quite as well as you would like try loosening or tightening the rear action screw about 1/8 of a turn, a little more, or a little less tension on the rear action screw can affect group size.
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All spot-on advice.
Something to consider with Hint #2 - If group size is affected by tightening/loosening the rear action screw, it usually indicates the action is being stressed or torqued. When bedded properly at the tang, there should be no detectable 'bending' or stressing of the action if both front and rear contact surfaces are bearing on even, uniform surfaces.
Sometimes removing just a bit of stock material at the tang, and re-bedding it properly with no discernible action stress is all that's required to get a 'good' shooting rifle, into an 'excellent' shooting one. At least that's been my experience FWIW.