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Posted: 12/17/2008 1:32:21 PM EDT
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My Colt .22 conversion in my 6920 (1/7 twist) will group TEN shots in an inch at 50', POI is about 3/4" below regular 5.56 rds at that distance. That's good enough for my purposes. Groups and POI seem identical with Winchester SuperX or Remington Golden Bullet bulk pack from Walmart.
The Remington bulk pack gets a bad rap from many people but it works fine in my AA Glock conversion, 10-22, S&W 317, and any other .22 I've tried it in. Misfires are my proplem in the conversion. The SuperX will give about one misfire in 20 but the Remington is about one in 5. Looking at the rims, it appears the firing pin is hitting further outward on the rim than my other .22's, but I don't have any fired cases from them to compare. I suppose it could also be that the bolt is not closing completely on the cartridge and some of the firing pin energy is being wasted in fully seating the round. Conversion is clean and well lubed. Yes, I could stop using the Remington but that stuff works well in my other guns and is SOOO cheap. And the SuperX is still giving more misfires than it should, it's about one in 50-100 in my other guns. Any comments or suggestions? |
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My Colt .22 conversion in my 6920 (1/7 twist) will group TEN shots in an inch at 50', POI is about 3/4" below regular 5.56 rds at that distance. That's good enough for my purposes. Groups and POI seem identical with Winchester SuperX or Remington Golden Bullet bulk pack from Walmart. The Remington bulk pack gets a bad rap from many people but it works fine in my AA Glock conversion, 10-22, S&W 317, and any other .22 I've tried it in. Misfires are my proplem in the conversion. The SuperX will give about one misfire in 20 but the Remington is about one in 5. Looking at the rims, it appears the firing pin is hitting further outward on the rim than my other .22's, but I don't have any fired cases from them to compare. I suppose it could also be that the bolt is not closing completely on the cartridge and some of the firing pin energy is being wasted in fully seating the round. Conversion is clean and well lubed. Yes, I could stop using the Remington but that stuff works well in my other guns and is SOOO cheap. And the SuperX is still giving more misfires than it should, it's about one in 50-100 in my other guns. Any comments or suggestions? GJim, I've got 2 of the Colt conversions and neither one of them likes the Remington Golden Bulk Pack. I get failures in feeding mostly with these. I have had good results with American Eagle 40 grain round nose, CCI 40 grain round nose, CCI Velocitors, and Winchester Wildcats. You may want to try the Federal Bulk Pack just to see if it makes a difference. Also on the back end of the conversion there is a metal tab that is bent toward the spring and buffer. This metal tab can bent gently away from the conversion unit to apply more forward pressure on the unit to help keep the chamber insert seated in the chamber a little better. Another option you could try is to remove the buffer and spring and replace them with a wooden dowel that will hold the conversion unit in place when the upper is closed. You could also use an aluminum rod cut to the proper length instead of the wood dowel and this would give you better long term results. Good Luck and let us know what works. AKASL LIVE FREE OR DIE |
| I dont use either the Remington or the Win X in bulk packs for any of my 22's. I have shot lots of both and just decided over time I was not going to use either of them any more due to many duds, feeding issues and being very inconsistant. Federal bulk pack is what I have found to be a lot more reliable and consistant then the other bulk packs and is what I hold each guns standard to, if it wont shoot Federal bulk pack reliable then I dont want the gun |
I have a Colt conversion kit and have more trouble with duds out of Remington rimfire than any other ammo. This is also the case in my two DPMS dedicated uppers and my Ciener conversion kit. I even get a lot of duds with Remington in my AA conversion kits for Glock. I can't explain it but its a fact. I have shot many thousands of rounds in my AA Glock kits and they now work with Federal 36 grain bulk as well as about any other ammo. I shoot a lot of Aguila and CCI ammo and don't hardly get any duds with that ammo. My son has a Taurus 22 lr revolver and I have a Ruger MK I and I get a lot of duds with Remington ammo in them. 25 years ago I used to shoot Remington golden bullets exclusively but quit buying it as often because I got so many duds. If you can figure it. please post the answer. I've pulled the bullets on a lot of dud Remington cases that didn't fire and it appears the priming compound is not spun up into the rim where it is being struck by the firing pin. If it'd work I'd buy more Remington but I don't need the aggravation.
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Thanks for the replies. As mentioned, the Remington works in all of my other .22's and I'd like to get it working in the conversion; also even the SuperX (expensive, not the junky XPert stuff) has an unusually high misfire rate.
This evening I looked at some of the fired Remington cases, they have a noticable bulge ON the case head when the "R" is embossed. However the case body and case rim are unbulged. I suspect that the extractors are holding the case enough that it gets shoved completely into the chamber, thus no case bulge. But the bolt may not be closing completely, thus the firing pin is reaching too far to hit the primer, and the excessive headspace is allowing the gas pressure to bulge the case head rearward. I'll investigatge further and post the results. EDITED TO ADD: The bulge on the case head matches the extractor cutout in the bolt face, so that may be normal with soft brass. Does not look like it is anywhere close to actually failure. Today I held the unit open and tried dropping loaded .22 rounds into the chamber; most of them dropped in cleanly but a few did not. The failures were more common with the Remington rds, but a few happened with SuperX, that somewhat matches the misfire rates of the two brands. A slight push was enough to seat each round, but that still isn't right. I'm going to power-clean the chamber (brass brush on an electric drill) and try again. |
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Today I thoroughly cleaned the chamber and boltface/breechface; relubed everything.
Further test firing reduced the SuperX misfire rate down to about 1 in 30, that's still much higher than the same ammo in my other .22's. Fired SuperX cases have a bulge on the case head similar to Remington but smaller. The Remington remained virtually unusable, about 1 misfire per 4 rds. I used a ballpoint pen to push forward on the bolt after each new Remington chambered, never felt the bolt move further forward and that did not improve the misfire rate. Tonight I'll try lightly polishing the chamber and soak the whole unit in solvent overnight, blast it dry and reoil tomorrow. The free outdoor range is snowed in so I'm paying $10 to shoot each time at an indoor range. Aside from price, the ventilation totally sucks; I'm blowing black boogers for two days after 30 minutes of shooting. Ugh! Can't wait to head for the Florida vacation. |
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