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Thread: .22lr conversion wearing out barrel

  1. #11
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    I went with a dedicated upper from Tac-Sol, and it is awesome.

    Try the Federal Bulk Pack - I shot a whole brick and when I patched out the barrel the patch came out damn near white. The Federal doesn't have a waxy coating and the bullet has a copper wash on it. they seem to be very clean shooting and I have never had a malfunction with those rounds.
    Last edited by 5shot; 08-05-10 at 11:37.

  2. #12
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    Quote Originally Posted by 5shot View Post
    Try the Federal Bulk Pack - I shot a whole brick and when I patched out the barrel the patch came out damn near white. The Federal doesn't have a waxy coating and the bullet has a copper wash on it. they seem to be very clean shooting and I have never had a malfunction with those rounds.
    Very clean indeed. The conversion bolt, chamber and chamber guide get a little dirty, but nothing major. I have put the CMMG away dirty after a bulk pack, only to have it function 100% thru another bulk pack next time out without any cleaning or additional lube.

  3. #13
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    I'm in the 3,000+ round CMMG camp too, but to each his own on that one. And yeah, the Federal Bulk Pack seems to be the cleanest, most reliable, and most accurate.

    As far as zero, I just leave mine alone. For punching torso sized cardboard out to 75 yards, it's fine. You can still drill a clay pigeon at 25+ without changing it, too.

    Just for "gee-whiz", I did bench it and fiddle with the elevation on the FSP one day, and I had to come up around 4 clicks to go from a 50yd zero with M855 to a 25 yard zero with the .22lr Federal. Not worth messing with for plinking.

  4. #14
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    how does the .22lr perform with a 1:9 twist? thats what my S&W has.

  5. #15
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    how does the .22lr perform with a 1:9 twist?

    and

    Is there a need for O-rings like the Spikes conversion has? Their description of why their bolt has O-rings makes it sound as if the CMMG bolt rolls around in the receiver when you shoot it.

    "Some unique features not found in any other current conversion kits include: O rings on the chamber adapter to keep the bolt centered in the .223 or 5.56 chamber and to increase the back pressure by sealing the adapter and not allowing so much carbon and gases to blow back"

  6. #16
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    Quote Originally Posted by cdj588 View Post
    how does the .22lr perform with a 1:9 twist?

    and

    Is there a need for O-rings like the Spikes conversion has? Their description of why their bolt has O-rings makes it sound as if the CMMG bolt rolls around in the receiver when you shoot it.

    "Some unique features not found in any other current conversion kits include: O rings on the chamber adapter to keep the bolt centered in the .223 or 5.56 chamber and to increase the back pressure by sealing the adapter and not allowing so much carbon and gases to blow back"
    I can't tell a difference between 1:7 and 1:9 barrels, and I'm not sure about the Spike's O-rings. I haven't had an issue after thousands of rounds through my CMMG kit (and the others I shoot with that own one), and I know a couple people that have 9,000-10,000 rounds with the Ceiner and CMMG kit without an issue. So...it's your call.

    I figured for the $150 I spent, it was worth finding out the hard way. Luckily, everything works great and it's the smartest firearm purchase I've ever made.
    Last edited by moose01; 08-05-10 at 16:29.

  7. #17
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    I have the Spike's and am shooting the federal 550 pack in a 1:9 RRA barrel/upper. I usually shoot out to about 50 yards and it is as accurate as I am. I haven't tried it in a 1:7 yet.

    Had some problems with double feeds this weekend but it appears to be mag related. I believe I have isolated the bad mag and will play some more this weekend.

  8. #18
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    Quote Originally Posted by cdj588 View Post
    Their description of why their bolt has O-rings makes it sound as if the CMMG bolt rolls around in the receiver when you shoot it.
    Not sure how you get that from their description as they are talkin about the chamber adapter, not the bolt. The bolt is locked into rails and would have a very hard time rolling around.

    FYI, the chamber adapter itself is what keeps it centered in the chamber. It is shaped like a 5.56 shell case and fits in the chamber.

    As to the O rings - I have over 3,500 trouble free (zero failures to feed, fire or eject) rounds thru my CMMG, why would I need an O ring? What would it improve for me?

  9. #19
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    I have a Spike's bolt--going to either sell it or return it again to mfg--the o-rings are for keeping the chamber adapter clean firing 22s--it does make a huge difference versus CMMG or ciener...nothing to do I think with loose fitting--although it helps a little I guess...my son scrubbed off both viton o-rings and it was a PITA to get replacement orings--as far as the bbl?? 22lr wont do anything to it

  10. #20
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    Quote Originally Posted by JSTICFRALL View Post
    Not to mention that as long as you're shooting copper jacketed ammo you should be fine as well. I know I've seen some non-jacketed 22 before and that's the stuff I'd stay away from. After shooting my friend's Bushy with a CMMG conversion in it, buying a kit is totally worth it. You can shoot all day for under $20!

    There is no such thing as copper jacketed .22 LR ammunition. Or, if there is, it's going to be rare and expensive. As 5shot mentioned, there is ammunition that has a copper wash, but that is nothing like a jacket. The copper wash is so thin you can scrape it off with your fingernail. I'm not trying to be a dick, but terminology matters.

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