7mm Rem Mag HSMHSM 7mm Remington Magnum. Quality American made ammunition from HSM (Hunting Shack Munitions) for the versatile 7mm Rem Mag. Reliable performance for big game hunting at extended range. 20 rounds per box. Caliber: 7mm Rem Mag American made 20 rounds Consistent ignition, reliable performance Elk, deer, big game hunting In store only. Available at Glenwood Springs Outdoors, 831 Grand Ave, Glenwood Springs, CO.