.300 RUM: 240gr SMK + H1000

Discussion in 'Reloading' started by mattj, Sep 15, 2008.

  1. mattj

    mattj Well-Known Member

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    Can anybody with experience with H1000 + 240gr SMK in the .300 RUM chime in with some loads to get me started... not having luck searching for it here or on Google. The Sierra manual only gives load data for H1000 up to the 220gr SMKs. I found one reloading data site that had some user-submitted loads from one guy, but I'd like to have a second and third opinion before I start exploding things near my face :)

    Want to try H1000 due to it's apparently excellent temperature tolerance and Mr. Carlock's luck with it in the EDGE.

    Thanks!

    ~Matt
     
  2. AJ Peacock

    AJ Peacock Well-Known Member

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    I don't have direct experience with the 240 and the RUM.

    But I ran some quickload numbers for you to use as a data point to compare against any other data you find.

    26" barrel
    240gr SMK
    H1000
    80gr 50985psi 2586fps
    81gr 53000psi 2615fps
    82gr 55087psi 2644fps
    83gr 57254psi 2672fps
    84gr 59503psi 2701fps
    85gr 61840psi 2729fps
    86gr 64267psi 2757fps


    64977psi is the max spec for the 300RUM.

    The loads I have seen on the net for the 300RUM always appear to be above the max that quickload calculates. But for what it's worth, quickload agrees very closely with the Hodgdon reloading data for the 220SMK (velocity and pressure).

    Hope this data helps, sorry I don't have direct info for you.

    AJ
     

  3. mattj

    mattj Well-Known Member

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    AJ -

    Thank you sir! Incredibly helpful -- and very closed to the "user entered" data I had already come across.

    Very much obliged!

    -Matt
     
  4. AJ Peacock

    AJ Peacock Well-Known Member

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    You're welcome, let us know how it works out and which load you settle on.

    AJ
     
  5. mattj

    mattj Well-Known Member

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    AJ -

    A little bit belated... but:

    [​IMG]

    Right around 2750 fps from my 30" barrel -- I couldn't be happier! (If you were wondering, it is a 4 round group instead of five because I was doing round robin with seating depths and ran out of light.)

    Thanks for the help!
     
  6. jwp475

    jwp475 Well-Known Member

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    IMHO a slower powder like US-869 would be worth a look in the RUM with 240 grain bullets
     
  7. mattj

    mattj Well-Known Member

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    Thanks for the tip... I intend to look into some more powders at some point...

    I decided to play with H1000 first because of the luck Mr. Carlock has had with it with the .338 Edge, and because of its consistency across different temperatures.

    I'm pretty confident that there is another node I can get to safely with H1000, just haven't had a chance to go find it yet. The high load that I stopped at last time had no pressure signs at all.
     
  8. jwp475

    jwp475 Well-Known Member

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    I love H-1000 in my 300 Win and 338 Lapua, but it's too fast IMHO in the 300 RUM with a 240 grain bullet for optimal performance IMHO. JonA got around 3000 FPS in his 300 RUM with US-869
     
  9. mattj

    mattj Well-Known Member

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    Nice... I'll definitely have to give it a try next :) Thanks again for the tip.