i bought my son a remington 700 cdl ss 264win mag. ordered 4 boxes of nosler 120gr ammo from midway usa.put scope and gun together and went to sight in.. shot only 4 rounds.. fired case sticks..? live round chambers fine. bolt is as smooth as can be.. bolt falls open without round. Question.. the ballistics on the box say 3250fps..and if you look in the ballistic page under reloading i don't see a 120gr ballistic tip doing those numbers..checked the case for marks and none... looks to have a little swelling in front of the belt... no cracks or powder marks on throat or around primer pocket.. any info would be welcomed..