Quantcast
  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

.50 Beowulf Range Report Not encouraging.

Discussion in 'Rifle Country' started by Sgt. Stiglitz, Apr 16, 2010.

Thread Status:
Not open for further replies.
  1. Sgt. Stiglitz

    Sgt. Stiglitz Member

    Joined:
    Sep 21, 2009
    Messages:
    104
    Location:
    Tucson, Az
    Ok I got my New .50 Beowulf Upper the other day. Loaded about 75 rounds of ammo. Brand New Starline cases from Alexander Arms. WW Large Pistol Primers, 38 Grs of Lil Gun under the Rainer 275Gr JHP. Nice load, accurate. Couldn't chrono as I was at work supposed to be Qualing! I had about 10 round where the primer just had a slight dent from the firing pin. One didn't have any mark at all. :what: Took the bolt out checked the firing pin retainer and the pin itself. All seem fine. Pin protrusion might not be enough will check it against my other AR's. Maybe a headspace problem I don't know. I will measure the cases after I pull the bullets. Not encouraging. Any Ideas Alexander Arms? I'm sure if you would test fire what you build this wouldn’t happen, even test fire with just primed cases would uncover this instead of wasting expensive rounds. I have been reloading for almost 30 years and I reload and cast for everything I shoot, from the .25 ACP to the .50 Beo........After reinstalling the bolt, half of the duds went off the second time. I still have 5 that won’t go bang...... :cuss:Group was shot at 75 yds.:neener:


    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]
     
  2. Dr. Tad Hussein Winslow

    Dr. Tad Hussein Winslow member

    Joined:
    Nov 14, 2007
    Messages:
    13,146
    Sorry to hear this - if headspace is right, call AA and ask for a shipping label to be sent to you - they should pay shipping both ways and fix it.
     
  3. glock36

    glock36 Member

    Joined:
    Apr 29, 2009
    Messages:
    276
    Location:
    South West, MO
    you are right that is a good looking group, sorry to hear about the light strikes. Hope all gets worked out and is nothing major.
    Good luck God speed
     
  4. One-Time

    One-Time Member

    Joined:
    Aug 18, 2009
    Messages:
    498
    Location:
    Florida
    So you reloaded rounds, or bought reloads and then condemn the cartridge based on that? If Im reading right Id say try some factory ammo first
     
  5. benEzra

    benEzra Moderator Emeritus

    Joined:
    Dec 25, 2002
    Messages:
    8,575
    Location:
    Down East in NC
    Those primers are barely dented, and the AR is *designed* for use with hard primers. Light pin strikes aren't the ammo's fault; something is amiss with the firing pin, hammer spring, or headspace.

    Edited to add: Scratch that, deep-set primers and the fact that .50 Beowulf headspaces on the case mouth skipped my mind completely. My bad...
     
    Last edited: Apr 16, 2010
  6. Sgt. Stiglitz

    Sgt. Stiglitz Member

    Joined:
    Sep 21, 2009
    Messages:
    104
    Location:
    Tucson, Az
    My cases fall somewhere between these, most are on closer to the Minimum case length. I replace the firing pin with a known good one and replaced the firing pin key. Cases that have a light strike still won’t go off. I pulled the pullets so all I have is a primed case. Longdayjake, I will replace the hammer spring and get back to you, here are a sample of my case lengths........Cases that fired are next to the calipers.......Most fall around 1.643 to 1.647.

    One-Time Member,
    I have been reloading for over 27 years, <deleted insult -- Sam>, If it's my reloading, I would have found it by now and all would have been duds......It's a headspace thing or case length problem, I have no control over either.........

    Maximum Case Length 1.655 inches
    Minimum Case Length 1.644 inches

    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
     
    Last edited by a moderator: Apr 16, 2010
  7. longdayjake

    longdayjake Member

    Joined:
    Apr 10, 2008
    Messages:
    2,607
    Location:
    Genesee, ID
    My guess is hammer spring. Something that could probably be taken care of in 2 minutes if you wanted to do the work yourself.
     
  8. Mags

    Mags Member

    Joined:
    Apr 8, 2009
    Messages:
    3,235
    Location:
    Belgium
    I don't think you read right at all, or have ever handloaded rounds yourself. If you did you would know your reloads are better than factory ammo. Also if you read right the OP clearly explains how he loaded the rounds so your "bought reloads" conclusion is completely off track. Read the OP all the way.
     
  9. Sgt. Stiglitz

    Sgt. Stiglitz Member

    Joined:
    Sep 21, 2009
    Messages:
    104
    Location:
    Tucson, Az
    Swapped out the lowers with my RR Varmint 20" Match lower. Ok I didn’t want to take a lower apart, the .50 has a brand new parts kit in it and it worked on the M-4 in .223. Still no bang on duds. One more check. Punched out lightly dented primers, they are still good. Reseated new primers…………watched the seating depth. These cases Have deep primer pockets. Beo uses large pistol primers. Ok I feel the lightest bit of pressure as the primers bottoms out, stopped here. Tried the primed round, BANG! Gotta watch the primer seating depth on these closely with mimimal length cases…..

    <Deleted insults--Sam>
     
    Last edited by a moderator: Apr 16, 2010
  10. Owen

    Owen Moderator Emeritus

    Joined:
    Dec 24, 2002
    Messages:
    5,928
    Location:
    Georgetown, TX
    Sgt,

    Do you have a depth mic? I'd be curious to know how far below flush your primers go. I have Starline brass for my 50, but I haven't fired any reloads yet. Do you think you weren't bottoming out the primers in the pocket, or do you think the pockets are so deep that the Firing Pin can't reach?
     
  11. Sgt. Stiglitz

    Sgt. Stiglitz Member

    Joined:
    Sep 21, 2009
    Messages:
    104
    Location:
    Tucson, Az
    There is a depth gauge on the end of the caliper but it might be hard to get a good thickness reading on a primer with the anvil. The lot of cases I got are from this April, last week. They seem to run on the minimal length side and looking at the loaded rounds I still have from the other day, I culled one, pulled it and test fired it with a primer only.........Yep just what I thought, too deep. They are almost indistinguishable from the others, maybe just a slight flattening around the edges of the primer but I know what to watch out for now.......They are just a tad below flush. You almost cant feel it.

    Found this here by Googling Large Pistol Primer sizes:

    According to SAAMI, the depths for small pistol, small rifle, and large pistol primer pockets are .118" to .122", while large rifle primer pocket depths are .128" to .132". Small pistol and small rifle primers have the same diameter (.175") while large rifle and large pistol primers are also the same (.210").

    Also, Speer recommends primers be seated .003" to .005" below flush.

    http://www.thehighroad.org/archive/index.php/t-369751.html
     
    Last edited: Apr 16, 2010
  12. larryw

    larryw Member

    Joined:
    Dec 22, 2002
    Messages:
    1,655
    IIRC, the 50 Beo headspaces on the case mouth, like a 45ACP. How's the crimp look on your duds and light-strikes?
     
  13. Sgt. Stiglitz

    Sgt. Stiglitz Member

    Joined:
    Sep 21, 2009
    Messages:
    104
    Location:
    Tucson, Az
    I think it is a combination of minimal length cases as you see how short mine are and deep primer pockets. I think I got it licked; will know next time at the range.. Or I gotta lots of bullet pullin' to do! It's not the crimp, Lee Dies from Alexander Arms are a 4 Die set and come with a factory taper crimp. I used to use CCI primers all the time but they had issues with Dillon presses so I switched to Winchester..... I use Winchester for all my reloading. My Crimps look like factory and I load for 9 MM, .25 ACP, .380, 9 Largo, and .45 ACP, I got the crimping thingy down. If this doesn’t fix it; it goes back. I don't know how to mess with the headspace nor should I have too.

    Most of my cases fall around 1.643 to 1.647. At least the ones I have fired and some of the new ones still not reloaded. Nothing is close to the 1.655.
     
  14. APIT50

    APIT50 Member

    Joined:
    Mar 7, 2008
    Messages:
    142
    Location:
    Cornhusker State
    From what you're saying, I'd say you could rule out the lower being an issue. I think that what was previously suggested is that it probably is an issue with the round not correctly headspacing off of the case mouth. With the shorter casings and crimping possibly allowing the round to chamber further than it should. Try putting a minimal crimp on you rounds. With the larger diameter bullet, the loading from magazine to chamber shouldn't be all that severe resulting in bullet setback.
     
  15. bigalexe

    bigalexe Member

    Joined:
    Mar 14, 2009
    Messages:
    931
    Location:
    SE Michigan
    I would not recommend using the end of the Calipers for a depth mic. I know that everyone does it including myself but in reality for the increments we want to discriminate the accuracy of that is too far off.

    This is a job for a real depth micrometer.
     
  16. briansmithwins

    briansmithwins Member

    Joined:
    Aug 1, 2005
    Messages:
    4,063
    It's sounding like that with factory ammo that was made to spec there wouldn't have been a problem after all. But everybody knows that reloads are better than factory...

    BSW
     
  17. browningguy

    browningguy Member

    Joined:
    Jul 21, 2004
    Messages:
    4,578
    Location:
    Houston, TX
    If your next trip is not ok, as previously suggested look at the neck crimp. The only problems I have had with my Beowulf were when I got the crimp set a bit to heavy. And that gave me exactly the problem you are having.
     
Thread Status:
Not open for further replies.

Share This Page