Have a purpose built 1000 yard gong ringer in 338 RUM. Withe the IOR 4-28x56 it comes in at 20 pounds and most of the weight is forward as the balance point is 1/2 the distance between the front of the trigger guard and end of fore end. (F class Savage stock). Have had no luck in finding a BiPod to support this beast. Even Sinclair tells me their F Class BiPod is not suitable. Have been shooting it with the largest Bulls Bag, on a home made wood box to support the fore end and a Shooters Ridge Zero Kick Rest (with the front pad removed) to support the back and dampen the recoil with a 25 pound weight (yes it kicks !). Very Mickey Mouse but it does work. Latest group at 300 Yards with 95 gr RL33, 300 Berger and NULA magnum primer.