I would try the hornady 168 grain match bullets.I have never had good acceptable results shooting that particular bullet. I would rely on h4831 with either the 168's or 175's if you have to use them.To reiterate I have never been able to get the 175 to fly right but the 168 is supreme and the hornady 165 spire point is a close second.The 30-06 was standerized with a 150 grain bullet,I wonder why.You don't need super heavy bullets out of a pencil thin sporter tube in the first place anyways. If you have any 150's go with imr 4064 as the propellelant of choice.That is all for now except the bedding screws,they go from the bottom of the stock into the receiver and the front screw should be 40 inch pounds and I run the rear at 30 inch pounds in a factory plastic,unbedded stock.Your problem could all be bedding and my next suggestion is to replace the stock with a laminate from boyds or stockys.
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