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blown up barrel

mussmuss Member Posts: 1,311 ✭✭✭✭✭
edited October 2007 in Ask the Experts
My brother was shooting his Ruger 270 light weight yesterday. It was magna-ported about 15 years ago. Well yesterday it gave up the ghost.

The barrel SPLIT in half right where it was ported. The first 2 inches (muzzle end) of the top half of the barrel is now standing almost straight up at a 90 degree angle.

Question???

Can he get the barrel turned down and recrowned behind the split area?

The barrel was 18" so the 16" SBR may be an issue with turning it down, I measured the barrel and I think we can get 16 1/8 of usable barrel.

Comments

  • TRAP55TRAP55 Member Posts: 8,289 ✭✭✭
    edited November -1
    Send it back to Ruger if it wasn't user error.
  • mussmuss Member Posts: 1,311 ✭✭✭✭✭
    edited November -1
    Trap,

    It was Magna-Ported by an after market co. called Magna Port.

    So Ruger will not touch it.
  • Hawk CarseHawk Carse Member Posts: 4,380 ✭✭✭
    edited November -1
    So talk to Magna-Port.
    They seem a reputable outfit and there is a chance they would help him fix it so as to keep their reputation.
  • TRAP55TRAP55 Member Posts: 8,289 ✭✭✭
    edited November -1
    quote: So talk to Magna-Port.
    They seem a reputable outfit and there is a chance they would help him fix it so as to keep their reputation.
    Yep, that's what I would do.
  • Tailgunner1954Tailgunner1954 Member Posts: 7,734 ✭✭
    edited November -1
    Unscrew the old barrel. Screw a good 24" barrel onto it. Enjoy it for another 50 years.
  • v35v35 Member Posts: 12,710 ✭✭✭
    edited November -1
    Lean on Magna Port. It's a black eye for them. They should want to make good. I'd be surprised if they didn't.
    After all, the failure wouldn't have happened without the Magna Porting.
    Sharp corners and abrupt changes in crossection are stress risers that can increase stress several hundred percent on stressed parts. That's why designers use generous radii when necessary.
    I would expect to see either by eye or under a microscope the conchoidal progressive failure ,known as fatigue failure, nucleating at one of the sharp corners of the cutouts.
    I would prefer the 16" shortened barrel with a Browning style tunable muzzle brake if given the option by Magna Port.
    Please give us a followup on this.
  • Laredo LeftyLaredo Lefty Member Posts: 13,451 ✭✭✭
    edited November -1
    When you contact them be sure to mention that no one was hurt. Otherwise they may get very defensive and might insist it was not their fault.

    If they see a potential personal injury suit coming their way, they may not help you at all. Try to be nice and non-demanding, that usually helps.
  • rufe-snowrufe-snow Member Posts: 18,650 ✭✭✭
    edited November -1
    I don't know if "Magna-Port" has changed their process for putting holes in barrel over the years? But I seem to remember when they started that they were using the EDM process. This essentially uses a electric arc to remove metal. Supposedly this doesn't leave sharp edges ( sharp corners/stress risers ) or burrs in the hole(s) in the barrel.

    Since it was done 15 years ago, not recently. There are most likely other contributing factors above and beyond the magna-porting, that caused the failure, i.e. the quality and original workmanship of/on the barrel.
  • v35v35 Member Posts: 12,710 ✭✭✭
    edited November -1
    The fracture has to be examined for a proper failure analysis. A micrograph would be preferrable especially in the case of an injury.
    Since the failure occured at the alteration, suspicion should fall on that first, then the parent metal. The degree of stress rise relates to amount of radius which eases transition of crossection discontinuity. A sharp corner is worst, a generous radius is best.
    Actually, we're talking about a fillet (internal) not a radius (external).
    The appearance of a conchoidal fracture means it was a progressive failure occuring over time. These failures often occur at the start of an arc.
  • mussmuss Member Posts: 1,311 ✭✭✭✭✭
    edited November -1
    Oh yes, No one was hurt in this. I will call them today and see what they have to say.

    Thanks.
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