Remington 700 Winchester XPR Tikka T3X Browning X-Bolt Savage 110 Bergara B-14 How much does 7mm Remington Magnum ammo cost? Depending on the grain weight and the type of round, 7mm Remington Magnum ammo ranges between $2 and $4 per round. 7mm Remington Magnum ammo is typically sold in ...