Need BMG50 gunsmith (near Raleigh)

Discussion in 'Gunsmithing - Assembly - Finishing' started by Sas quatch, Jun 9, 2018.

  1. Sas quatch

    Sas quatch Happy to be here

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    Click.... Boom. Casing stuck in chamber, magazine blown out, extractor broken.

    The ammo manufacturer looks like they'll cover it, but need a gunsmith with experience in .50 cal.
     
  2. Pink_Vapor

    Pink_Vapor Well-Known Member Supporting Member

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    Wow, hope you didn’t get hurt, and we’d love to see pics!
    There’s a machinist in Ral area that has made them, I’ll see if I can get up with him.
     
  3. NKD

    NKD Senior Member Charter Member Benefactor Kimberless

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    Did it leave a crater?

    Glad you're alright man!
     
  4. Sas quatch

    Sas quatch Happy to be here

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    I'll get some pictures together- I need it to send to the ammo manufacturer. I was lucky I wasn't hurt- and honestly that more damage wasn't done. The worst thing I got was a face-full of debris- that probably was unburnt powder which was all over the 'lower' (the BA50 is an AR-ish design).
     
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  5. NCLivingBrit

    NCLivingBrit Clueless Protoplasm Supporting Member

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    Give Josh at Patriot Shooting Sports a call, he's familiar with stuff up to 20mm.
     
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  6. Pink_Vapor

    Pink_Vapor Well-Known Member Supporting Member

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    Was it the ammo, or Bushmaster/Remington/Freedom Group?
     
  7. REELDOC

    REELDOC Member Benefactor Supporting Member

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    Consider sending to manufacturer.
     
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  8. cjcullom

    cjcullom Happy to be here Charter Life Member

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    Pics would be awesome! Severe over gas....have you fired the rifle previously? Wondering about head spacing and such. It would be great to see where the firing sequence failed and left evidence. Is there a ring above the extractor groove on the case? Soooo many questions....glad you werent hurt!

    Rooster
     
  9. Sas quatch

    Sas quatch Happy to be here

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    Yes, I've fired the rifle 20-ish times. Headspace is a theory as well, but seems less likely than a bad round. I hope the gunsmith can determine. I did write bushmaster and they said to to ammo manufacturer first.

    I've got an email into Patriot- thanks.
     
    Last edited: Jun 12, 2018
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  10. Sas quatch

    Sas quatch Happy to be here

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    Pictures

    upload_2018-6-15_17-28-53.png upload_2018-6-15_17-29-51.png
    upload_2018-6-15_17-30-41.png
     
  11. cjcullom

    cjcullom Happy to be here Charter Life Member

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    Looks like the magazine acted like a "blow off" valve and vented. The case head looks skewed too but maybe just the pic angle. Have you tried tapping a wooden dowel down the barrel to see if that case will push out? Maybe hit it with a blow dryer beforehand to change tolerances and loosen it up.

    R
     
  12. Sas quatch

    Sas quatch Happy to be here

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    Yep, I didn't notice how much the magazine was damaged until I saw it side by side. Since the case looks intact all the blowby must have come through the primer hole. There was unburnt powder in the lower. I'm taking it by Patriot today.
     
  13. Sas quatch

    Sas quatch Happy to be here

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    Just got it back today. Patriot Shooting Sports was amazing. Super professional, did tons of leg work and got it back to me in perfect shape. It took a while, but that was because of Bushmaster taking their sweet time on parts.

    Here's what happened: Bad Ammo.

    I pulled the trigger. Pop. Boom. Face full of powder and a non-functional gun. The shell was stuck in the chamber. It came out easily enough with a rod, but the extractor was broken, and the aforementioned magazine was trashed.

    They determined this:

    A reloaded round had a bad or loose primer pocket (it appeared to be oval, maybe damaged during swaging?)
    When the trigger was pulled the primer popped out of the head, but managed to light off the powder.
    The lit round went off like a bottle rocket forcing the case forward into the lands, bending the mouth.
    It still managed to get enough pressure to get the bullet out of the barrel, but a lot of the pressure went backwards, melting the primer and blowing apart the magazine.

    I'll be turning in a claim to the manufacturer of the ammo.
     
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  14. NKD

    NKD Senior Member Charter Member Benefactor Kimberless

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    Glad you got it fixed!
     
  15. NCLivingBrit

    NCLivingBrit Clueless Protoplasm Supporting Member

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    I know I'm biased because I worked there but Patriot are great guys. And while Josh hasn't been a gunsmith for 40 years, he's methodical and more importantly knows what he doesn't know.

    I'm glad they were able to sort it out for you.
     
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