I free-float my TCR forends so the wood does not touch the barrel (more or less). However, it is probably best to have wood to barrel contact for about a 1-inch portion of the forend closest to the action. There is a guy named Norman E. Johnson who writes a lot of articles for Varmint Hunter Magazine. He has done a lot of experimenting with TCR's and he recommends that in addition to glass bedding the 1-inch portion of the forend closest to the action. Note that with the free-foating the lug on the barrel will ride on the metal in the forend so there should not be a lot of flopping around. By doing it this way point of impact does not change with varying tightness of the forend screw.