Borden Rimrock B actions were specifically designed for LV benchrest rifles. The Rimrock BR action is light and works well for the LV rifles but we found many competitors wanted the standard Remington Short action “bolt throw”. The Rimrock BRM tends to be too heavy for LV benchrest so we modifed the BRM design to result in a lighter action that maintains the bolt throw of a Remington 700 short action. We bobbed the tang from 2.250 inches long to 1.8 inches long and we opened the loading port to 3.0 inches long. These changes reduced the weight to make the B action perfect for building the Light Varmint benchrest rifles.
The action is 1.350 in diameter and is made of hardened 416 Stainless Steel. The bolt body is hardened 4142 steel and is spiral fluted. The action with dual port setup (6.5×284 Win length ejection port) with no recoil lug for glue in weighs 31 ounces. It is available as Right Bolt Right Port, Right Bolt Left Port, Left Bolt Left Port, Left Bolt Right Port, Right Bolt Left Port Right Eject, Left Bolt Right Port Left Eject. There are 2 sizes of ejection ports. The mini 6.5×47 port is 1.950 inches long and is designed for the 6.5×47 Lapua family of cases.
The mini 6.5×284 port is 2.4 inches long and is designed for the 308 Win and 284 Win family of cases. Of course the longer miniports will also eject the shorter cases. We are offering a .215 thick spacer ring for individuals that want to adapt barreled they have fitted for Stolle Panda actions. The action comes standard with a cylindrically ground finish. Mirror polish is available as an option. The action is also available with dual blind pinned 1/4 inch thick recoil lug. the action has a middle and forward guard screw holes milled and thread milled to 1/4×28 tpi. Receiver can be ordered with a 8×40 screwed, 20 MOA Picatinny Rail – *or add the optional 40 MOA Picatinny Rail, available in our products tab for purchase.