I have an older model Remington 300 WM Sendero (all matte blue)with HS stock, I am having issues with the accuracy of this rifle, the trigger has been adjusted to 3 lbs, barrel is not touching the stock and the groups are 1.7 @ 100 yards. I have tried three brands of factory ammunition and have handloaded numerous rounds trying to improve and the best it will do is 1.3 @ 100. The crown appears fine, barrel has been cleaned properly with rod guide, proper size jags and brushes and very little copper is showing in the barrel. My other Sendero .308 will shoot .5 with factory Federal GM...any suggestions will be appreciated.