This Norma American PH 6MM XC diamond lined ammunition is 105 grain. 50 per box.

6 XC is a 6mm cartridge initially developed by modifying a .250 Savage case to optimize for match competition shooting. The 6 XC stands for "across the course" and was initially a wildcat caliber, but is now commercially available and a popular choice around the world for long range target shooting and hunting.