I have the exact same setup (.204 hvy bbl), What I ended up doing,after taking my brothers advice, was to re-drill another hole approx. 1" back from the factory swivel hole, There is a molded rib in the forestock which is where I place my hole,The width of this rib is the exact same diameter to accomodate your new hole & swivel screw. You have to be careful and make your measurements exact . This gives a much better, steadier platform for the Harris bi-pod