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Thread: XCR-M Owners: Bit of a warning

  1. #31
    CGN Regular cathaldj's Avatar
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    17 ft lbs is "3 fingers" tight with a wrench. a 1/4" bolt should take at least 90 ftlbs before failure, more if grade 3 and above. That bolt is cheap crap.

  2. #32
    CGN Regular Hunter709's Avatar
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    You're not the only one with this issue, I had the exact same thing happen about 2 days ago. Was also using a proper torque wrench set to 200in-lbs. Got in contact with Wolverine already and it looks like the issue should be resolved fairly painlessly. Only problem for me is that now I can't try my .308 pistol mags that arrived today. Its not a big deal, especially considering the flooding that Wolverine is dealing with the past couple days. Stay safe guys.

    Cheers,
    Mitch
    "If everyone is thinking alike, someone isn't thinking."- General George Patton Jr, NFA, CSSA and NRA Member

  3. #33
    CGN Regular Xero's Avatar
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    I got to try out my 10 round pistol mags in this before it acted up. Fun stuff and no feeding issues before the barrel screw became lose!

  4. #34
    Business Member Grumpy Wolverine's Avatar
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    There is a heli-coil in there and that is what you will be seeing the red from. The barrel bolts are not loctited. The proper setting is 250 inch pounds and we torque them down to that all the time here at the shop. Remember too, one click, don't bounce click the torque wrench. Once we are able to get back into the shop, drop us an email and I'll get you sorted out with a new bolt.
    If you have any questions please call or e-mail:

    Phone: (204) 748-2454
    E-mail: sales@wolverinesupplies.com Retail Sales


  5. #35
    CGN Regular Xero's Avatar
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    Quote Originally Posted by Grumpy Wolverine View Post
    There is a heli-coil in there and that is what you will be seeing the red from. The barrel bolts are not loctited. The proper setting is 250 inch pounds and we torque them down to that all the time here at the shop. Remember too, one click, don't bounce click the torque wrench. Once we are able to get back into the shop, drop us an email and I'll get you sorted out with a new bolt.
    Awesome, thanks Grumpy Wolverine! I'll keep an eye out here for an announcement as to when you're back to normal operations.

    In the meantime I'll look into having a gun smith remove the existing screw body.

  6. #36
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    Quote Originally Posted by KePet View Post
    And fortunately it's a common thread, so it was easy enough to get a replacement at the local hardware store for about 89 cents
    You should get the replacement bolt and not just any bolt. The contact point with the barrel has a precision angle cut that matches both parts, ensuring the same precision fit every time you mount the barrel. In other words, the bottom of the bolt has a V-shape taper that matches the V-shape groove on the barrel. This aligns the chamber correctly, or else you could have headspace issues among other problems such as not holding zero.

    The bolt on the stock, sure 89 cents.
    Last edited by Jaydam; 07-02-2014 at 10:01 PM.

  7. #37
    Member sofarsogood's Avatar
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    "hand tight then turn another 70 degrees...... Or max 200in/lbs"
    Manual sounds a bit misleading as hand tight isn't all that tight to start with... Follow by another 70 degrees... Versus 200in/lbs which was obviously enough to shear the head off.... Interesting problem there!

  8. #38
    CGN Ultra frequent flyer RobertMcC's Avatar
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    Quote Originally Posted by sofarsogood View Post
    "hand tight then turn another 70 degrees...... Or max 200in/lbs"
    Manual sounds a bit misleading as hand tight isn't all that tight to start with... Follow by another 70 degrees... Versus 200in/lbs which was obviously enough to shear the head off.... Interesting problem there!
    Its for field use, not everybody has a torque wrench in their car.

  9. #39
    CGN Regular captainamazing's Avatar
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    Quote Originally Posted by bobsonofbob View Post
    Wow, seriously that must have been a cheezy bolt.....
    Had the same issue with "aircraft grade" components that I was using on a Bell 214. Bolt heads kept sheering off when torqued to spec. Turns out the Vancouver B.C. company where the parts were made was actually just getting them shipped from China with some really whacky metallurgy. RA may or may not be to blame as I doubt they manufactured the bolt.
    "Never trust quotes you read on the internet"
    - Abraham Lincoln

  10. #40
    CGN Regular Mr.S's Avatar
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    Quote Originally Posted by captainamazing View Post
    Had the same issue with "aircraft grade" components that I was using on a Bell 214. Bolt heads kept sheering off when torqued to spec. Turns out the Vancouver B.C. company where the parts were made was actually just getting them shipped from China with some really whacky metallurgy. RA may or may not be to blame as I doubt they manufactured the bolt.
    Well isn't that just lovely..

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