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Sierra Pro Hunter 220 Round Nose "The Hammer Of Thor"

Discussion in 'Ammunition & Reloading' started by mr.revolverguy, Sep 6, 2015.

  1. mr.revolverguy

    mr.revolverguy Ohio Active Member

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    Reloading is such a rewarding experience for me, the thrill of the chase in trying to produce the most accurate ammunition possible and the fun of being on the range testing makes for a great day. I now have been reloading 300 Blackout for some time and have documented my loads and experiences in this journal.

    Wanting to try some of the heavier subsonic bullets like the 220gr Sierra Pro Hunter, Missouri Bullet Company 245gr Lead Bullet and the 203gr Palmetto Lead Coated bullet all in an effort to drive down cost I ordered small amount of each. Immediately I noticed the lead bullets would shave no matter how straight you had them aligned. Leaning on my experience of having loaded tens of thousands of lead 45ACP and 44Magnum rounds I knew right away I needed to flair the neck of the 300 blackout case. I purchased a universal Lee Expander rifle die, I have a lot of Lee dies and they have served me very well. This particular die just wasn’t what I was looking for it only really flared the mouth. To keep the lead bullets from shaving I felt the expansion of the mouth of the case was extreme with the Lee Die, though I am sure it would work great on other calibers. A friend of mine who has a lot of reloading experience about 25years of it, 6 years more time behind a press than I do recommended the Lyman M Die.
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    This would be exactly what I was looking for, the Lyman M Dies expands the case mouth and the neck of the case in two stages. Please be sure to pay attention to item number on the box in the photo it is important that you get exactly this model. There is another model which won’t work as well due to overall length. With the use of this die all of my troubles would go away. A great side effect I have noticed is that my rounds all seem to be more accurate as well. So I have changed my reloading routine to include expanding the neck of all my rounds including jacketed.

    Being very interested in the Sierra Pro Hunter or as I would name it “The Hammer of Thor” I would load up some of these rounds with my favorite 300Blackout Subsonic powder A1680. Rounds are checked with the Sheridan Slotted Gauge to ensure fit in the rifles I test with. This powder produces great subsonic groups with 220gr Sierra Match King, this load would not prove to be as accurate.
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    Though not as accurate as I would have liked I decided to press this round into my first 200 yard test with my Ruger American Ranch Rifle.
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    See the full article and results of my 200 yard testing. Leave a comment on the page and let me know what you think acceptable 200 yard groups are for 300Blackout. http://www.dayattherange.com/?page_id=5006

    One of the largest independent 300blackout load tests - 65 loads tested across 4 rifles
    http://www.dayattherange.com/?page_id=3817
     
    Stomper, Don H and Dyjital like this.
  2. Dyjital

    Dyjital Albany, Ore Flavorite Member Bronze Supporter

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    I'm afraid of that round...
     
  3. mr.revolverguy

    mr.revolverguy Ohio Active Member

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    Afraid? Do explain.
     
  4. The Heretic

    The Heretic Oregon Well-Known Member

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    Interesting.

    However, looking at the specs for the bullet, Sierra lists it as non-expanding at subsonic velocities.
     
    Darkker likes this.
  5. Dyjital

    Dyjital Albany, Ore Flavorite Member Bronze Supporter

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    A bit of humor that's all.

    The 300 is just soooo much bullet for that case it's like an instrument of torture. (Considering it's typical to see 55-75gr in that case).

    I applaud your attention to detail. :s0152:
     
  6. No_Regerts

    No_Regerts United States Well-Known Member

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    Yeah, it looks like that case got fi$ted. What does that headspace off of? The neck?
     
  7. Certaindeaf

    Certaindeaf SE Portland Well-Known Member

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    I think a 220gr 9x19 is subsonic. lol. a lot a machinations/drama to get a slug slow.
     
  8. PotshotJim

    PotshotJim Oregon Member

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    What suppressor are you using for these tests?
     
  9. mr.revolverguy

    mr.revolverguy Ohio Active Member

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    Yankee Hill
     
  10. PotshotJim

    PotshotJim Oregon Member

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    I get similar 50 yard groups with the 220 Sierra Pro Hunter and 208 Amax. I've only checked the Amax loads to 150 yards, but the 10 shot group was under 4". This was using a 8" pistol with a 1x vortex spitfire and AAC SDN-6.
    The additional drop from 150 to 200 yards is about 30 inches, and I didn't have good enough sight picture with the red dot to shoot for groups that far. Getting old, I guess.