Is your forearm wood or synthetic?
It shouldn't be a problem anyway. If it fits too tight you can always sand out inside channel if it's wood or take a little of the synthetic off with a sharp blade and even pulling strokes. I've floated barrels with synthetic stocks this way and have got excellent results. Easy too.
Of course I would try it first without modifiying it to see how it shoots. It might not need any.
-Aaron
