6.5-300 Weatherby Magnum

The 6.5-300 Weatherby Magnum is a 6.5mm cartridge created by Weatherby in 2016 as its own rendition to the ever-growing 6.5mm long range rifle market. Wikipedia
 
Case length2.825 in (71.8 mm)
Case capacity98 gr H2O (6.4 cm3)
Bullet diameter.264 in (6.7 mm)
Overall length3.600 in (91.4 mm)
Base diameter.512 in (13.0 mm)
Shoulder diameter.4949 in (12.57 mm)