Check suppressor is tight, check action screws. Were scope bases/rings properly mounted with degreased screws and a torque wrench?
10 round groups are the minimum I trust for a solid zero. Same ammo lot if using different boxes? Lot to lot factory ammo can be dramatically different.
10 round groups are the minimum I trust for a solid zero. Same ammo lot if using different boxes? Lot to lot factory ammo can be dramatically different.