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 RickFinsta
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Joined: Jul 2008  WI, USA
 Posts: 692 Feedback: 100% (4) |
Posted: 4/1/2012 10:44:23 PM
Gentlemen, I just put together a dedicated .22 upper using one of your barrels, and the SS conversion I've had for a year or so that's run like a sewing machine (I'm very happy with tha product, along with your mags and BHOA). Now that I've thrown the parkerized feed ramp section onto the SS conversion and put it in the dedicated upper, it keep catching rounds on the top of the chamber (about every third round or so). I've buzzed the chamber and polished the feed ramp, but I guess my question is: am I going to have to buy the SS feed ramp section for this to work right? There seems to be a slight amount of play fore and aft but that was there with the original SS chamber adapter, too, so I'm out of ideas.
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SpecOps-13
Weapon Systems Test and Evaluation,
Team Member
Joined: Apr 2007 FL, USA
Posts: 4603 Feedback: 0% (0) Link To This Post |
Posted: 4/2/2012 8:46:10 AM
Is this the barrel with a ball and detent? There should be no
movement fore and aft. the ball and detent shouldn't allow movement. If there is, you need to add a spacer to the rear of the bolt to hold it in place. Or look for a problem with the ball or detent and the bolt to barrel lock up. Good Luck, Dave S PS: Not using Remington Ammo are you? |
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RickFinsta
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Joined: Jul 2008 WI, USA
Posts: 693 Feedback: 100% (4) Link To This Post |
Posted: 4/2/2012 10:16:27 AM
Thanks for the quick reply. Yes, this has the ball detent, but the entire things seems to be moving back and forth. I'll make up a spacer for the rear tonight and see what's what (you said rear of the bolt, but I think you mean between the rear of the conversion module and the buffer face, correct?). I've been using Federal 333/555 packs, as that's what it liked before.
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RickFinsta
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Joined: Jul 2008 WI, USA
Posts: 694 Feedback: 100% (4) Link To This Post |
Posted: 4/2/2012 7:47:37 PM
For the record, I'm an idiot and I meant to type Winchester 333/555 packs. Also, I took it out again today and it is still getting failures to feed and some light strikes, though not as often, so I'm going to fabricate up a spacer that'll take up the slack in there.
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SpecOps-13
Weapon Systems Test and Evaluation,
Team Member
Joined: Apr 2007 FL, USA
Posts: 4606 Feedback: 0% (0) Link To This Post |
Posted: 4/3/2012 8:38:00 AM
Yes a spacer at the rear as you stated. But, I still think it should lock in better with the ball and detent by themselves... ???? I'm Dumbfounded.
Winchester is very good ammo... Dave S |
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RickFinsta
Member
Team Member
Joined: Jul 2008 WI, USA
Posts: 696 Feedback: 100% (4) Link To This Post |
Posted: 4/3/2012 12:52:28 PM
Would that fact that this lower might have an out of spec buffer retention hole make a difference here? Also, the barrel extension is not flush with the reciever internally, it is set forward a little bit. I'm not sure if this is normal with the dedicated .22 barrels or not.
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SpecOps-13
Weapon Systems Test and Evaluation,
Team Member
Joined: Apr 2007 FL, USA
Posts: 4608 Feedback: 0% (0) Link To This Post |
Posted: 4/3/2012 7:03:27 PM
I don't see the buffer retention hole being a problem. Actually, you don't even need the buffer and spring for the 22.
On the other question.. ????????????????????? I don't know.... 
Dave S |
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RickFinsta
Member
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Joined: Jul 2008 WI, USA
Posts: 697 Feedback: 100% (4) Link To This Post |
Posted: 4/3/2012 7:49:34 PM
You really don't need anything behind the conversion unit? I guess I didn't realize it was located on the ball detent (even after you basically said exactly that, several times).
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forever4
Firearms aficionado
Team Member
Joined: Nov 2008 KY, USA
Posts: 2987 Feedback: 100% (27) Link To This Post |
Posted: 4/4/2012 1:45:36 AM
I was out of town and came to this party late...sorry. As for the SS bolt with the Parkerized adapter: I have run a set up like that for some time (many thousands of rounds) without issue so there is nothing in the design that should cause this problem. Off the top of my head I can not think of a common situation that could cause what you are experiencing.
Some suggestions: Take out the BHOA (the Bolt Hold Open Adapter) and try it like that. See if it makes it work better. Sometimes they are out of adjustment and can cause an issue. Also, I am assuming you have tried different ammo and different magazines to see if those make any difference. The buffer is not needed. On one of my .22 AR's I don't even run one and it works fine. BUT, this is assuming everything else is OK on the rifle. Some have found that they need the buffer in place. Also, some have added material to the buffer to insure it holds the bolt forward snugly to insure proper function. Good luck and keep up updated. |
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RickFinsta
Member
Team Member
Joined: Jul 2008 WI, USA
Posts: 711 Feedback: 100% (4) Link To This Post |
Posted: 4/18/2012 7:21:14 PM
I tried it without the BHOA, and it still wasn't working well, so I polished the feed ramp mirror smooth, and buzzed the chamber (though this was happening before entry into the chamber, so I doubt that helped this issue). I then stoned some of the rough lower surfaces on the bolt, and on the top of the BHOA (where it interfaces with the bolt), and now it runs like a champ. The only issue is sometimes the bolt drops when I insert a mag, but it chambers a round so I don't really care!
Thanks, CMMG - great product and I've already paid for it in savings over shooting 5.56. |
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