Harris do a number of "adaptors" including a rubber taper bit that sits between the stock & the bipod to pad out thin or rounded stocks which I use with all my rifles.

One thing I recommend is that you trial your bipod position before you drill for the stud, most people fit them a couple of inches from the front but I much prefer the stability & balance of bringing it further back towards the trigger but not so far it interferes with your grip when not using it.

ALWAYS remove the action from the stock before drilling & make sure the bolt/screw does not protrude before refitting it.