300 WSM reloading info request

Discussion in 'Reloading' started by ARTD338, Feb 4, 2014.

  1. ARTD338

    ARTD338 Member

    Messages:
    13
    Joined:
    May 6, 2013
    Barring that I find a serious reason not to, I plan on buying a light weight rifle in 300 WSM, and was wondering two things.

    #1-Are there any problems unique to reloading the 300 WSM I need be made aware of, or as I all my research to date has indicated, the 300 WSM reloads much like any other rifle caliber.

    #2-Is there 1 or 2 powders that out shine all the rest for use in the 300 WSM with bullets weighing 180 grains and 165 grains respectively? This rifle will see use out west predominately as a light weight elk rifle, and secondly if I ever get the bug to hunt antelope, WT or Mule deer should the oportunities presents themselves.

    Thank you,
    Arthur.
     
  2. Jud96

    Jud96 Well-Known Member

    Messages:
    1,468
    Joined:
    Jun 30, 2013
    Nothing special about reloading for it. Powders that do the best are RL-22 and RL-25.
     

  3. AKGuide

    AKGuide Well-Known Member

    Messages:
    234
    Joined:
    Feb 17, 2013
    For the 165 I have had great luck using H414, W760, and H4350. With the 180 grain bullets I have had good results using H4831. I have also heard that R17 gets high velocities in the WSM case. Most accurate load I loaded was W760 and a Swift Scirocco 150 grainer. It consistently was a 1/4 MOA load out of a factory savage 10, and devastated caribou.

    Reuben
     
  4. BountyHunter

    BountyHunter Writers Guild

    Messages:
    4,803
    Joined:
    Jun 13, 2007
    H4350 and RL17 are the go to powders.
     
  5. TBuckus

    TBuckus Well-Known Member

    Messages:
    153
    Joined:
    Jun 12, 2012
    Not an issue with reloading per se, but I have heard that some have a hard time getting accuracy with bullets above 200gr. with the wsm.

    I was able to attain .6" group with 180 gr. ttsx's with R19. Didn't go farther with that load since I was happy with that from my stock Tikka. But I am not a long range shooter.
     
  6. Gunpoor

    Gunpoor Well-Known Member

    Messages:
    418
    Joined:
    Apr 28, 2007
    My only experience with the 300WSM has been with 165 grain bullets and IMR4350 worked very well with it. I have heard with the heavier bullets that moderately slower powders such as H4831 can be used. The only problem I had loading for the WSM is my Lee Auto-prime had to dremel treat the shell holder opening to accept the large case head which was not much of a problem.
     
  7. live2huntmt

    live2huntmt Well-Known Member

    Messages:
    126
    Joined:
    Jan 7, 2014
    + 1

    Stock Tikka T3 Lite 300 WSM shooting sub 1/2 MOA out to 400 (haven't shot it farther) with RL19 and 180 gr TSX
     
  8. speeders

    speeders Well-Known Member

    Messages:
    100
    Joined:
    May 25, 2005
    I ended up at 66 gr of H4350 shooting a 168 BT.
     
  9. Shortmagman

    Shortmagman Well-Known Member

    Messages:
    447
    Joined:
    Feb 22, 2008
    I have found that with 150-165 grain bullets that powders in the burn rate close to H4350, RL-17, and RL-19 work best. When I move up to 180-190 weight I have had very good results with N165 and IMR-7828.

    Here are a couple of targets that were shot with my Winchester Model 70 Coyote. It is a stock gun with a Timny trigger.

    First one was shot with 155 Sierra Match bullets, RL-19 powder in Norma cases. It is a five shot group at 100 yards.The second one was shot with 185 Berger Hybrids, and IMR-7828. It is a 3 shot group at 100 yards.
     

    Attached Files:

  10. tbrice23

    tbrice23 Well-Known Member

    Messages:
    1,741
    Joined:
    Dec 12, 2012
    Have you guys seen a difference between h4350 and imr 4350?
     
  11. frequent misser

    frequent misser Well-Known Member

    Messages:
    170
    Joined:
    Dec 24, 2005
    I have seen very little difference. It takes about 1/2 to a grain more h4350 in my loads.
     
  12. tbrice23

    tbrice23 Well-Known Member

    Messages:
    1,741
    Joined:
    Dec 12, 2012
    Im going to be breaking in a 16 fcss in 300wsm next week. I have more imr 4350 than h4350 and only 1 pound of rl17. So I'll probably load imr first with both 168 and 185 vlds to start.
     
  13. steeltraps

    steeltraps Well-Known Member

    Messages:
    222
    Joined:
    Dec 13, 2013
    I to have had great results with h4350 and RL-17!
     
  14. minute of elk

    minute of elk Well-Known Member

    Messages:
    174
    Joined:
    Mar 7, 2012
    Haven't made it past r17 & 208 amax's yet. They've held one third to one half moa in my t3. I didn't chrono it, but it doped out at around 2900 fps.