model 11 lrh 300wsm feeding issues

Recently purchased a model 11 long range hunter in 300 wsm.
Trouble shooting a few problems before I have my first range day with it. Im having feeding issues where the rounds (150gr winchester super X power-point) are impacting the breach face and not connecting properly with the feed ramp into the chamber. Bolt will not even close without unreasonable force which still causes the casing to get stuck diagonally in the chamber. I've talked to CS about it and they are sending me a replacement top for the magazine box. Anyone had this problem and a reliable fix? Polish feed ramp, adjust the magazine box etc..?
Thanks

You'll need to figure out whether it's going high or low to determine which direction to alter the magazine.