Action Fit: Alpha,BBR-SA,Browning BBR,Meyer,RPA Quad Lock,Whichita 1375,Wichita 1200,Millennium,Firearms Development,Hall Bolt Diameter: .870 Cartridge: 6 mm - 284 Winchester,25/284 Winchester,6.5 mm - 284 Norma,6.5 x 284 mm Winchester Delivery weight: 0.136kg