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I had the same issue on my factory stock 10/22. Except the nose dives on mine seemed to be a little more severe than yours. I ended up chamfering the breech face on mine and it seems to have cured the issue. I would hope you wouldn't have to do that with higher end parts though. Proceed with caution.
More info on the issue can be found here http://www.rimfirecentral.com/forums/showthread.php?t=780737
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That was my initial thought... that the chamber edges are pretty sharp and maybe I could lap the chamber mouth with some lapping compound and a round brass screw/rod similar to lapping a barrel crown. It’s just the thought of modifying (and maybe voiding warranty) on a brand new integrally suppressed barrel is crazy. I’d probably contact KG-Made and have them look at it before lapping, cutting or chamfering my brand new registered barrel/silencer on my own.
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Make sure your mags are not able to slide back and forth. I had a butler creek 25 round mag that would shift position forwards and cause some .22 projectiles to shave lead off the chamber mouth edge and jam up like that. If I grabbed that mag like a foregrip and kept pressure on it from walking forward it would feed flawlessly. A few small pieces of tape on the front of that mag and problem was solved finally where I didn't have to hold the mag in place. As suggested if you can get hold of a 10 round factory mag see if that will feed it better. Make sure everythings in alignment. If your op rods also just a touch out of line I've remembered seeing in other peoples threads reporting simliar issues. Chamfering is an option but only if necessary. Once you remove something you can't replace it. Take too much and you can create yourself other issues. Good luck.
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The mags do have some back and forth wiggle if I pull them back and forth, but I think the spring plunger does a pretty good job of pushing and holding the mags forward.
Another thing I though is maybe somethings off... how far should a barrel stick into the receiver? Maybe the barrel is just a bit too close to the mag and I either need to put shims on the barrel shoulder or shin the mags backwards some??
Here’s pics of the barrel protrusion into the receiver and the edge of the chamber. It does look like the edge of the chamber edge is broken, but not quite a chamfer.
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