handloading 300wsm

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by mphstigerfan, Mar 7, 2010.

  1. mphstigerfan

    mphstigerfan Well-Known Member

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    I recently bought a winchester mdl 70 coyote in 300wsm. second box of bullets were federal premium factory ammo and groups were around 1moa. since then a friend and I have been trying to work up a load for it and I wanted to shoot 180 gr accubonds. I have all but given up on getting the accubonds to group as we have tried several different powders with nothing grouping under 1.5 moa. does anyone have any suggestions?
     
  2. jbroadnax

    jbroadnax Well-Known Member

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    Try 65-66grs of Reloader 17. It is the best performing powder in the 300wsm with 180's. I am getting 3180fps out of a 26" barrel with 180's. I have had really good luck with Supreme 780 too.
     

  3. mkg

    mkg Well-Known Member

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    I've been using H-4350 with both 180 Nosler Ballistic tips and Berger 185 VLD's with sb-MOA results @ 2995ft/sec .

    Mike
     
  4. retiredcpo

    retiredcpo Well-Known Member

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    I use 63 gr of 4350 with WLRM primmers and winchester brass
    I get sub moa groups out to 500 yards
    hope this helps
    retiredcpo
     
  5. baldhunter

    baldhunter Well-Known Member

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    I'm getting good groups with 165gr Hornady Interbonds with 69.0grs of Winchester WXR or Reloader-22 and also 65.0grs of IMR-4350.
     
  6. MontanaRifleman

    MontanaRifleman Well-Known Member

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    H4350 and RL17 are good powders in the 300 WSM. RL17 will get you a good bit more velocity. I would say just keep trying different combos of bullets and powder until you get a good one. And make sure your loading procedures are accurate and consistant.

    -Mark
     
    Last edited: Mar 9, 2010
  7. D.ID

    D.ID Well-Known Member

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    I am using 65 grains of h4350 loaded to 2.855 oal with 180 ct ballistic silvertips in my tikka and its a .5" gun. Attempted the accubonds which look the same but cost twice as much and best group I could get was 2+" I was so disgusted I did not even measure it I just switched back to my cheap highly effective bullets. I have not had anything yet that shot the accubonds well.
     
  8. mphstigerfan

    mphstigerfan Well-Known Member

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    shortmagman has been helping me develop a load and today he shot a .40 three shot group with 67 gr. of reloader 19 and 165 gr accubonds also shot a .70 with the same bullet and 69 gr reloader 19. other groups were around an inch. apparently the gun disliked the 180's. regardless of powder charge.
     
  9. Blacktail

    Blacktail Well-Known Member

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    What type of velocities are you getting? i picked up a 300 SAUM and thinking about shooting the 165's or the 150's. I wouldnt think the wsm and the saum would be that different. thnx
     
  10. mphstigerfan

    mphstigerfan Well-Known Member

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    I haven't checked velocity yet. today shortmagman was just checking some loads for accuracy. next we may play with the powder charge and see what kind of velocities its getting. we do know that a similar load in a similar gun was right around 3000 with 67 gr. of rl 19. this is not a max load. no sticking and plenty of case capacity left.
     
  11. OKIE2

    OKIE2 Well-Known Member

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    Try Hornady Amax'a sst's they are good bullets.
    I don't buy near as much Noslers any more like I used to.
     
  12. 400bull

    400bull Well-Known Member

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    Blacktail,

    I get 3150 fps in my Win M70 Sporter 300 WSM with Hornady 165 SST's backed by 69 grains of RL-17. If memory service me correct this is a couple grains of max. When loaded to max (72 grains) I was getting 3250 +/-.

    400bull
     
  13. elkaholic

    elkaholic Well-Known Member

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    Mark.....What velocity did you say you were getting with RL-17? I'll be getting my 300 Sherman together pretty soon and it should like similar loads.....Rich
    ALSO what was your load
     
  14. mkg

    mkg Well-Known Member

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    elkaholic,

    I asked MontanaRifleman the same thing via PM . His reply was that he got close to 200ft/sec more velocity using RL-17 VS H-4350. He reported a velocity around 3193ft/sec . Ive got a great load for H-4350 but I think If I can find a pound of 17 I'm going to give it a try.

    Mike
     
    Last edited: Mar 18, 2010