300WSM Jump Gap

Discussion in 'Technical Questions & Information' started by JD Parish, Apr 27, 2009.

  1. JD Parish

    JD Parish New Member

    Apr 27, 2009
    I have a winchester 300wsm the jump gap is 80ths. past what the loading manuel list for the max.OAL for the bullet I am loading.My question is how close to the riflings can I get without creating a presure problem.
  2. Helix_FR

    Helix_FR Active Member

    Apr 14, 2009
    Imperial, MO
    Let me preface this by saying I do not have anything in a 300WSM but I do reload and I do reload for accuracy. OAL really only comes into play with a semi-auto. Bolt and break barrel actions are more forgiving. The gap between the lands and the bullet can vary w/o creating any pressure problems. I have heard of reloaders seating the bullet to were it just touches the lands. They do this b/c this is how there gun is most accurate. This may not apply to you. Its something you have to play with. You do lose some of your seating depth b/c of this therefor you lose some durability of the bullet being able to stay in the brass if you drop a round.