where do 300SMK`s like to be seated?

Discussion in 'Reloading' started by groper, Sep 22, 2009.

  1. groper

    groper Well-Known Member

    Sep 2, 2008
    My 338-300RUM is finished and now im just wondering where to start on how far off the lands to seat the 300smk for load development? My rifle has a deeper throat than Shawn`s 338edge, my rifle runs 3.900" COAL to just kiss the lands...

    Ive tried seaching but surprisingly not much comes about this subject...
  2. Broz

    Broz Well-Known Member

    Feb 3, 2007
    Mine are very happy at .062" off the lands. I have tried them closer but they didn't seem to like it.


  3. remingtonman_25_06

    remingtonman_25_06 Well-Known Member

    Jun 4, 2003
    I got the wyatts mag box for my 338 EDGE and my rounds are loaded at 3.780" w/the 300g smk.. I use it as a repeater. Got a box of 225g AB's and once again, I can load them out to 3.780" and there not touching the lands that I"m aware of.

    I just loaded them to the longest the mag would allow and thats where they I started load and stopped load testing.

    I only tried 2 loads w/300g SMK, the standard 92 and 93g H1000 w/cci 250. 92g showed better ES so I went with it. Both loads shot 1/2 MOA.

    I think Shawn has stated that anywhere from 3.660" (standard 700 mag length) out to around as long as 4" and they all still shot great. Not one length was ever any better then the other.
  4. RockZ

    RockZ Well-Known Member

    Mar 10, 2006
    For my 338 lapua ai I shoot them at .015 off the lands.
    Excellent results