Sako knows practice makes perfect. That's why they've developed the 50-gr. Premium .223 Rem. Range Rifle Ammo. This line of ammunition offers training and competition cartridges at an affordable price. Sako brass cases have a reputation of outlasting the competition. Made of high-quality copper alloy, they've been tested to sustain repeated loading better than standard cases. Using Vihtavuori premium powder, Sako ensures excellence in loads. Imported. Per 100.