MVP 556 Extractor's are available

Discussion in 'CrossHair Precision LLC' started by robert lynch, Apr 15, 2015.

  1. wood chucker Moderator

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    Send a PM to Robert Lynch, he'll take care of ya.
  2. robert lynch CrossHair Precision Industry Partner

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    Thanks Wood, I sent him a pm.

    Rob
  3. spamassassin Well-Known Member

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    I finally broke one of the replacement extractors. It required the use of a hammer and was definitely due to abuse and silliness.

    Long version: I was reloading last night and had thought that my brass was well segregated but no, a bunch of brass from someone elses gun crept in and I didn't notice it because the headstamps were all the same. They were the same because I loaded them all the last time and let someone shoot some of my ammo in their gun. Well, my chambers are clearly much tighter. I normally only neck size my brass and so when I sized this bunch up I just neck sized, completely unaware of the chamber dimensions issue getting ready to bite me on the wee wee.

    As is my process and because I only neck size if I can get away with it I did a chamber fit check on a sized unprimed case that I'd shallow seated a bullet in and smoked the outside of to verify my seating depth. As soon as I ran the bolt forward I knew I'd done it with a little too much gusto and that the round wasn't sized and that the bullet was jammed into the rifling and the case was thoroughly stuck in the chamber and the bolt was almost closed. I tried to pull the bolt back by hand to no avail and only got as far as getting the handle to lift with a bit of extra stump put on the effort but, it was not sliding anywhere. So, out comes the rubber mallet and a couple swats on the bolt handle has the bolt slid back. I pull the bolt to check it for damage and see my extractor sitting just a little cockeyed. One of the little rails that keep it in the groove had mostly broken. Only mostly though. The extractor was still in the bolt, the claw was intact and the ball and spring were, crucially, still under the extractor in the bolt and not lost in my garage mess. I pulled out my spare extractor and installed it and after a little work with a Dewey rod and a concave tip and a little more of the rubber mallet the chamber was cleared and I figured out I'd have to full length resize all 100 of the cases I'd just neck sized. Sigh.

    When I finally got the case out of the chamber I looked at the rim and saw an extractor width bite taken clean out of it. Smacking the bolt with the mallet to open it had clearly put enough force on the brass to shear a nugget off cleanly and to bust most of one of the slider rails on the extractor but it wasn't enough to damage the claw face. Pretty tough parts.

    Later on last night the same damned thing happened with my 7mag. I gotta figure out how to segregate my brass better. It's eating up extractors and not doing my Dewey rods any good.

    Oh, and please put me down for another extractor or 2. Don't need the ball or spring this time.

    And here are the spring dimensions:
    2.1mm width
    5.8mm length
    1 dead coil bottom
    2 dead coil top
    6 live coils
    3.1mm fully compressed length
    Maybe 1-3lbs:in spring rate. Firm but not hard.
    wood chucker likes this.
  4. wood chucker Moderator

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    Awesome post.

    By chance did you measure the spring wire thickness ?
  5. robert lynch CrossHair Precision Industry Partner

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    Spamassassin,
    Thanks for taking the time to post about this. I will get you the final version of the extractor. I am impressed that it broke the case of the shell. I also like the fact that it stayed in place and you didn't loose the ball and spring. Please pm me your address so I can get a replacement out to you.

    Also on another note I will have springs to try by middle of next week at the latest.

    Rob

    Sent from my 0PJA2 using Tapatalk
  6. spamassassin Well-Known Member

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    Wire thickness I didn't get a measure on. It's very fine wire
  7. spamassassin Well-Known Member

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    And chalk up another busted one. I don't know for certain what caused this one to break but I would suggest it was just the abuse of a very intense day. Unfortunately I didn't catch it when it actually happened. Only after I had to beat a third case out with a dewey rod did I even suspect it. The brass I was using was a little ratty at the rim on quite a few rounds, so this wasn't uncommon yesterday. I'm cycling through all my aged brass and getting a last hurrah from the EOL'd cases before the next competition season starts and I start on a fresh set of cases. I don't think the duty cycle on these MVP's can't be pushed as hard as some of my others from what I'm seeing. Get em hot and run hot loads in em and they're a bit less forgiving than say a Savage.

    Yesterday I put 400 rounds downrange of some max charge 70gn loads in just a couple extended firing sessions going from 200-900m. The gun was VERY hot at points and the mirage was killing me at anything over 200m after a while. I was testing the performance consistency of a new load based on Benchmark powder and seeing how they reacted to running the tactical course and getting really hot like we always end up doing in a match. The day was 100deg, sunny and bone dry and I tell ya what, drop 2 30rd mags through as fast as you can get on target in that environment and the thing becomes too hot to actually hold on to anymore really fast, especially in a LSS chassis. Sheesh that sucks up heat. In any event the actual breakage was interesting. The claw bit came off and left the base in the slot holding the spring and ball in. You could see the ball detent sitting there in the middle of what was left there which was very satisfying. Didn't have to go looking for it. Given the punishment I gave that rifle, I'm not surprised. I'm also not going to be surprised in about 2000 more rounds when I need a new barrel. But then I'll have the thing blueprinted and put a Black Hole Weaponry barrel on it.

    On the upside, a max load of benchmark under Berger 70gn pills seated to jam .010 with CCI #41 primers in LC brass was giving me a consistent .5" 200m group. Seeing 3 shots touching on a steel plate is cool but not uncommon. Getting 20 shots in a 1 inch cluster was even better. At the end of the day groups started to open up a bit so I know it's time to clean the bastard now.
    Keith and N2HO like this.
  8. robert lynch CrossHair Precision Industry Partner

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    Spam, I sent you out the production versions already. I am actually surprised the proto's held as long as they did. Different material on the new version.

    Rob

    Sent from my 0PJA2 using Tapatalk
  9. strange rider New Member

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    Hi, I tried to send you a PM - not sure if it worked. I'd like to buy an extractor. Thx
  10. robert lynch CrossHair Precision Industry Partner

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    Strange Rider, Pm inbound.

    Rob
  11. Logan stewart New Member

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    Are these still available? I really need one mine broke an have been waiting forever to get one from mossberg. I'm wondering how to get one, thanks
  12. robert lynch CrossHair Precision Industry Partner

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    Hi Logan, yes they are. I will send you a pm tonight when I get home.


    Rob

    Sent from my 0PJA2 using Tapatalk
  13. Logan stewart New Member

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    Okay thank you.
  14. Fishslayer New Member

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    I'm in for 2 of the new extractors. Where would I find ordering info?
  15. Fishslayer New Member

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    Finally got around to installing my new extractor. Popped right in easy peasy. Kicked the brass out just like it should. Now I gottsta get some glass on this thing & try it out at the range! :D

    Thanks for the super quick shipping, Robert!
    robert lynch likes this.
  16. robert lynch CrossHair Precision Industry Partner

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    Fish,
    Thanks for sharing. What glass are you looking at?

    Rob

    Sent from my 0PJA2 using Tapatalk
  17. DaKahuna Member

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    Jun 23, 2015
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    Anyone have any hints or tricks to removing the factory extractor? I thought I could get it out using a small screwdriver but mine appears to be thick to fit under the extractor.
  18. robert lynch CrossHair Precision Industry Partner

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    Feb 11, 2014
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    Take and lay a towel down on the table. Hold the bolt face down toward the towel and use your flat blade and push straight inward towards the firing pin hole. It should pop straight out and the spring and ball will stay in the towel.

    Sent from my 0PJA2 using Tapatalk
  19. DaKahuna Member

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    Thanks, I'll give that a try.
  20. spamassassin Well-Known Member

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    To reinstall I found it pretty easy to hold the bolt face up, drop in the spring and set the ball on top of the spring with my fingers on either side of the extractor cut-out keeping the ball centered. Then I use an exacto knife blade that fits in the channel to hold the ball down and insert the extractor from firing pin side out pushing the exacto blade out of the way with the extractor. The risk of flinging the detent ball and spring across the room is pretty significant with this method unless you're careful to mitigate the avenues for escape. DO NOT DO THIS ON CARPET. It took me months to find my spring when I did it on carpet and launched the spring.

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