Did you install a larger barrel?
If you did and have to remove quite a bit then you can cut the sides with a razor bladed utility knife. Then sand to even it out. There is usually lots of clearance below the barrel. Cutting at the bottom may be more suited to a dremmel with drum sander. It might be cheaper to buy the Boyd's than buying all the dremmel drums..lol
If you are just increasing the stock floating then the sand paper will take care of it in short order.
My .02
Good luck