worn spot on end of bolt

Discussion in 'Gunsmithing' started by luke5678, Jan 19, 2011.

  1. luke5678

    luke5678 Well-Known Member

    Jan 18, 2011
    I have a 1 year old Remington Sendero in 7mm Mag. I noticed my groups are not what they used to be. Was about 1/2 and turning into 3/4 inch at 100 yards quickly.

    I noticed a bump on the rim of my bolt past the lugs. The lugs look fine but it appears to be a flat spot worn pretty bad on the last quarter inch of the bolt and a bump on the rim that is easily seen and felt. Appears to be a small washer on the inside of the wall that is part of the bolt where the "bad" spot is.

    Does anyone know what this is and if it's a problem? Sure doesn't look good. The blueing is gone and is a hump on the end of the bolt rim.
  2. Trickymissfit

    Trickymissfit Well-Known Member

    Jun 11, 2010

    can you post a picture?
  3. Coyboy

    Coyboy Well-Known Member

    Jan 30, 2005
    sounds like that is the spot that the extractor is pinned to the bolt nose, often times it will raise a small bump on the bolt noses' face.

    The outside of the rivet will often times be touched on a grinder to smooth it off at the factory.

    You accuracy problem. Could be the barrel needs a good cleaning, could be yopu over cleaned the gun with somthing you shouldn/t have.
    Could be you clean without a bore guide. could be a scope base ring issue, could be stock bolts not as tight as they used to be. Could be about 20 other things including the driver, dif lot of ammo or powder. Brass necks work hardening ect ect ect. No one said any of this is easy.
    Last edited: Jan 20, 2011