Remington Sendero Will Not Shoot! Need Help

The formula that was suggested to me after shooting moly and then going to copper was to run a number of passes with JB Paste.
With 190 Sierra HPMK Moly is about 1.5 at 300 yards using the Sierra accuracy load of 70.4 grains of Re22.
With 190 Hornady BTSP and 73.0 of Re22 gives 3.0 inches at 300.
That was while switching one to the other and I could not see much difference but the POI changes with a molyed bore and then going to the Hornadys.
Would be interesting to see what differences would be produced by using moly on the Hornadys.
My rifle is a 700 Sendero in 300 Win Mag using a Bushnell 4200 6-24 x 40 SF.
 
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