I have a Rem 700 300 win mag tactical that I use a Harris type bipod on that has the internal and external coil springs . When I fire it with the bipod not in use it vibrates like a tuneing fork thrugh the Kevlar stock so I removed the springs and replaced them with bungee cords but they are not strong enough to keep the legs down if I slide the rifle back to get into fireing posistion . Any ideas on types of bipods for heavy recoil .