Charlie,
<br>I have raised one bench at our local range for stand-up shooting as I find too many Alaskans buying lightweight 375s and wanting me to sight them in. When sighting in those lightweights or 378 WB, I loop a strap around my 50 pound front sand bag and back around the butt of the rifle...that way when the rifle recoils it must drag the front bag with it also.....
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<br>When I tell these lightweight magnum owners to sight-in their own rifles......they usually trade them off before the next season.....