Sig CG Rifle failure to eject

My buddy has alot of experiance with the Sig 550 series and knows how to service this firearm. It is definately a defect of some sort. We are just tring to determine what the culprit may be.
 
I think I should mention that I have read the manual carefully and that I wasn't HEAVILY lubing the gas piston, unless wiping it down with a patch wet with Break Free is heavily lubed. However I wasn't wiping it dry before shooting it. I'll take it to the range and give her another run with a dry piston. Also no barricade nearby when cases stayed in the chamber. The design also makes this rifle hard to put together wrong, no way that I can see (or have you found a way to put it together wrong the hard way?) Finally in section 4.2.6 of the manual it says to "lightly oil the gas piston and recoil spring" - I find it hard to believe that I oiled it so far beyond this point that I'm causing malfunctions (I do read manuals). Thanks to Redleg for taking an interest in this - I'll try to eliminate everything before I send it back.

I just read and quoted what you stated. If you are now correcting that statement to say you only gave it a lightly oiled patch, then that certainly changes things - With a thin film of CLP it should most definately not have cycling issues attributed to the oil on the piston.
As far as whether it will run sporatically if put together wrong -I can't say; I've never tried it and have no intention to.;)
 
howdy

I had this same problem some time back (there's a thread of mine floating around somewhere). I had a case jamming every 40 rds or so(neck towards bolt, and head towards chamber), talked to the boys at tse and got the same response so tried running a dry piston, light grease, etc and they mentioned they'd send an email to someone inquiring whether the ejection port had been lengthened (as per their specs), never heard back from them about the ejection port.
Eventually i got pissed off and after a couple bottles of bubbly liquid courage broke out the dremel and ground about a 1/2 mm out from the back and haven't had a hiccup since (~1500rds)

That being said, i will assume no responsibility for anything that may result from the removal of expensive metal (lol), just offering up another opinion beyond too much lube.

ryan
 
FTE with two types of ammo

I've had failures to eject with both Winchester Ranger .223 and American Federal Eagle. I'm up to 4 or 5 failures in about 4-500 rounds. I've cleaned it religiously and have been leaving the piston dry for the last 100-150 rnds - prior to that it had a film of Break Free on it. I think I'll run her once more with every type of ammo I have and see if there's more problems. I don't think I'll dremel my rifle but the info was definitely interesting. Thanks.
 
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