Bolt sleeving is not new to the gunsmithing industry. It was tried and used by other smiths before I came
      along. What set me apart has been the reamer/mandrel I designed, with interchangeable bushings to center the
      mandrel in the action and recut the bolt bore raceway to the same diameter. This then allows bushings of the    
      same diameter front and rear. As seen on the action truing page the mandrel is then used to align the action in the
      action jig.

         In the picture above, is a setup from my bolt sleeving video. It shows the 0.0084 cant that is induced on a new
      Remington long action. This cant will tip the top bolt lug 0.0019 off the top action lug seat. This happens whether
      the action has been trued or not. Its caused by the cocking piece sear and the upper trigger sear holding the firing
      pin in the load position. With about 22 lbs. of spring pressure on the sear faces and behind the rear bridge area
      of the bolt, the bolt is pushed up in the back. The fulcrum point is the rear bridge and the bolt angles down ward
      until it rests on the bottom of the front bridge. The shorter the bolt and action the greater the top lug is tipped off
      the action lug seat for the same amount of cant at the back of the bolt.. In the book RIFLE ACCURACY
      FACTS, this condition in an action can result in mechanically induced vertical stringing.
 

         What the sleeves do is hold the bolt level and centered in the raceway. Now when the firing pin is loaded the
      bolt doesn't cant and tip the lug. Along with this you don't have a bolt falling in the action when the trigger sear is
      released. The bolt falling is a bolt face moving. The ignition of the primer/powder is started before the bolt hits
      the bottom of the action. This creates another vibration to the barrel that you have to deal with in developing a
      load. It's also inconsistent. Sleeving the bolt creates a very consistent ignition system.
    

         When I do the final fitting of the sleeves on the bolt, they are made elliptical. This allows free cycling of the bolt
      because we have the original clearance plus a few thousands, but as you close the bolt, it cams into alignment
      and holds the bolt in a repeatable position. This is why I recommend double sleeving not only for competition
      rifles, but varmint and hunting rifles also.