7mm Rem Mag Black Dog Ammo 154gr Hornady SPBlack Dog Ammo 7mm Remington Magnum 154gr Hornady Spire Point. Quality hunting loads for the 7mm Rem Mags flat trajectory and hard hitting performance on elk, mule deer, and large game. Reloadable brass, non corrosive. 20 rounds per box. Caliber: 7mm Rem Mag Bullet: 154gr Hornady SP 20 rounds Controlled expansion, reliable penetration Elk, mule deer, large game In store only. Available at Glenwood Springs Outdoors, 831 Grand Ave, Glenwood Springs, CO.