I agree with MIKEY: However, it will depend upon what the rifle is going to be used for as to how much wood to remove. Hunting rifles can be relieved to the "paper sliding" technique. However, if it is a competition gun, more wood needs to be releived for the increase in bbl size due to heat.
The reverse, (full channel bedding) as MIKEY states is also great, however, I have tested this method quite extensively to discover, in most cases, that the group will shift after about 5-6 shots.
The forearm screw on the Ruger, adding pressure to the barrel, is a good system. However; after extensive testing I discovered that the pressure on the barrel is a marrying situation. That is, some barrels require more pressure than others. Again, a marrying situration. This system is incorperated on the Mauser, .308 located on my home page. Using this system, barrel pressure, produces cold shot groups of 1/4" @ 100yds. (earth level machine rest) Again it is a marrying situation and the amount of pressure will vary with the barrel. Even the same type of barrel in a different guns will not be the same.
HJN