Sako Sierra MatchKing 338 Lapua 300 Grain Brass Cased Rifle Ammo 20 Rounds. All components of the TRG cartridge line are selected for ultimate consistency and accuracy. TRG Precision cartridge manufacturing follows the stringent Sako quality standards which involves an all-new accuracy testing process. Specifications for Sako Sierra MatchKing 338 Lapua 300 Grain Brass Cased Rifle Ammunition: Manufacturer: Sako Caliber: .338 Lapua Magnum Number of Rounds: 10 Bullet Type: Open Tip Match (OTM) Bullet Weight: 300 grain Cartridge Case Material: Brass Application: Target Package Type: Box Included Accessories: None Primer Style: Centerfire Application: Target Package Contents: Sako MatchKing 338 Lapua Mag 300 Grain Brass Cased Rifle Ammunition What is Sako Sierra MatchKing 338 Lapua 300 Grain Brass Cased Rifle Ammunition good for? The manufacturer suggests that it is good for target.Sako JAS-TRG338LM/300B: Sierra MatchKing 338 Lapua 300 Grain Brass Cased Rifle Ammo 20 Rounds