300 WSM loads

Discussion in 'Reloading' started by ryaninutah, Oct 5, 2011.

  1. ryaninutah

    ryaninutah Member

    Sep 30, 2011
    I know every rifle shoots a little different, but I was wondering if you guys could give me some load formulas that you have been successful with the 300 WSM for a 165-180gr bullet.

  2. mtelkhntr78

    mtelkhntr78 Well-Known Member

    Dec 30, 2008
    Mine is 67.3 grs of RL-17 with CCI mag primers behind a 168gr Barnes TSX. Good accuracy and outstanding MV!
  3. 400bull

    400bull Well-Known Member

    Sep 4, 2007
    I will double check my data when I get home from work tonight but I think that I have 65.5 gr. of RL-17 pushing 180 Hornady SST @ 3050 FPS, and 67.5 gr RL-17 pushing 165 Hornady SST @ 3150 FPS. Both will shot sub MOA groups in a factory Win M70.

  4. JesseJames

    JesseJames Active Member

    Jul 3, 2011
    I am shooting 165 Nosler BT for deer hunting in my 300WSM. I am using 70.0 grns RL-19, CCI 250 primer, Winchester case loaded to 2.9" OAL. The load shoots quite well out of my model 70. I have found that RL-19 or 4350 seems to be a good powder for the 165 weight bullets.
  5. baldhunter

    baldhunter Well-Known Member

    Jun 18, 2008
    Be careful working with any load,always work up to it,every rifle is different.I have to load mine a little lighter.Mine has a short throat and I have read this can be a problem in some WSM chamberings.If your rifle has a little freebore,you can probably load a little higher.I played with Reloader-17 and this was my results:
    Win cases and WLRM primers are used with all my loads.I loaded 165gr Hornady Interbonds 20 thousands off the lands.65.0grs gave me 3155fps and 2"groups @ 100yds,66.0grs gave me 3220fps and 4" groups @ 100yds.The velocity was way up there,but my groups sucked.The higher I went,the more it opened up so I'm sure my pressures had to be way up there too.I had loads for 66.5 and 67.0,but I didn't see a need to try those considering the results I was getting.The Alliant manual shows a max load of 68.0grs with a 165gr bullet @ 3217fps.I was getting this velocity with only 66.0grs.I haven't had a chance to work with this powder anymore,but my notes show to try 63-64grs.This is another reason to also use a chronograph when working with new loads.
    My rifle likes IMR-4350 and Reloader-22.I worked up loads with these powders and both ended up shooting the best groups,around 1/2" @ a 100yds and nearly the same velocities which was 3010fps with 65.0grs of IMR-4350 with 165gr bullets and 69.0grs of Reloader-22 @ 3020fps.I'm 1.5-2.0grs shy of a sticky bolt lift with these loads in my rifle,but I'm quite happy with it's accuracy and it's performance on game.
  6. bs911

    bs911 Member

    Oct 1, 2010
    Just found a sweet spot in my Browning x-bolt .300 WSM.

    65.5 grs of RL17 in Norma Brass, Federal Large Rifle Magnum primers, Berger 155 gr hunting vlds with an OAL of 2.865 to fit in the magazine, coming out at 3175 fps. The first (measured) group of 3 on this combo had an ES of 3 fps. Sure, that could have been the lucky 3 but I wrote it down and locked it in. Ended up around 3/4" at 100 yards.

    With this powder type/bullet/primer combo we reached 3300 fps but didn't have the accuracy as this particular load. We started light and worked it up, rinsed and repeated.
  7. Korhil78

    Korhil78 Well-Known Member

    Jun 22, 2011
    I did some test loads over the weekend with ramshot hunter and 185 gr VLD. Loaded up 62gr, 62.5gr and 63gr. The first two loads shot a 1 inch group but the 63 gr shot a .171 three shot group at 100. Only problem is that I loaded them touching the lands and they wont fit into the magazine. I am going to shoot some more under a chrono with 63 gr, 63.5 and 64 to see how they do seated deeper into the case. If they dont do well, I may just have to make it a single shot haha. I will post some pics later in the week when I get done. None of these loads were hot at all so I should be good to get all the way up to 64 gr. Hopefully, I can keep the velocity in the 2900 to 3000 fps range.