Maxim Defense Industries Precision Rifle Ammunition 6mm ARC 90 Grain Tumble Upon Impact Rifle Ammo 20 Rounds. To address these concerns Maxim Defense partnered with Fort Scott Munitions to optimize ammunition loads specifically for SBRs. By making these adjustments as well as including their TUI (Tumble Upon Impact) technology the Maxim Defense Ammunition ballistic wound cavities exceed the standards of both Expanding and Fragmenting projectiles. Specifications for Maxim Defense Industries Precision Rifle Ammunition 6mm ARC 90 Grain Tumble Upon Impact Rifle Ammunition: Manufacturer: Maxim Defense Industries Caliber: 6mm ARC Magazine Capacity: 20 Round Bullet Type: Solid Copper Lead Free: Yes Application: Hunting Home Defense Target Shooting Primer Style: Centerfire Bullet Weight: 90 grain Cartridge Case Material: Brass Package Type: Box Features of Maxim Defense Industries Precision Rifle Ammunition 6mm ARC 90 Grain Tumble Upon Impact Rifle Ammunition The TUI design of the projectiles tumble all the way down to 500 fps. Package Contents: Maxim Defense Industries Precision Rifle Ammunition 6mm ARC 90 Grain Tumble Upon Impact Rifle Ammunition Maxim Defense Industries MXM-49136: Precision Rifle Ammunition 6mm ARC 90 Grain Tumble Upon Impact Rifle Ammo 20 Rounds