Unibrain Posted March 26, 2017 Share Posted March 26, 2017 I have a CKarms Open Thunder in 9mm with around 3000 rounds. Today at a match I had numerous Failures to Eject and the gun would constantly stovepipe. When it did run the cases barely rolled out of the ejection port. We tried several things including a new 9 lbs recoils spring (made it worse) and adding a new rear spring to the Aftec (old rear spring moved to the front with no change in the malfunctions). I eventually changed to the only other recoil spring I had which is a 12 lbs wolf. The gun ran and I put 150 rounds through it without issue. I use mixed brass and the eject pattern was little wild but throwing the brass into a fairly consistent pile. Does this make sense and is a 12 lbs spring the right choice? Of course A1 is this weekend and I really don't have time to do much before the match. Any help is appreciated, Jim Link to comment Share on other sites More sharing options...
al503 Posted March 26, 2017 Share Posted March 26, 2017 Off the top of my head and I'm sure you've done this but: Check the ejector to make sure it's not damaged/broken. Taken a q-tip and cleaned out the extractor tunnel. Check out the extractor hook for damage and gunk build up. Slide a round under the hook to check for proper extractor tension. Any way you could be thumbing the slide? I have wolff/ismi/springco springs in pretty much every weight. You're welcome to try any/all of them. Al Link to comment Share on other sites More sharing options...
Unibrain Posted March 26, 2017 Author Share Posted March 26, 2017 Ejector looks good, i.e. not broken. Extractor hook looks good and holds a round. I'll do a good top end cleaning and get out to the range this morning and see if it makes a difference. I don't think I'm thumbing the slide but I'll pay attention to that as well. I may take you up on the springs if I can't get things to work. Fingers crossed. Link to comment Share on other sites More sharing options...
digi531 Posted March 26, 2017 Share Posted March 26, 2017 Some history on the gun ? Was it running good before, did you change something, etc.. Twelve pound spring is on the heavy side. Make sure the extractor is fitted properly and the tunnel is clear of gunk, my first thoughts would be the ejector or extractor, but especially the extractor. If you have an old standard extractor lying around try it to rule out a problem with the Aftec and go from there. Link to comment Share on other sites More sharing options...
Gooldylocks Posted March 26, 2017 Share Posted March 26, 2017 Some history on the gun ? Was it running good before, did you change something, etc.. Twelve pound spring is on the heavy side. Make sure the extractor is fitted properly and the tunnel is clear of gunk, my first thoughts would be the ejector or extractor, but especially the extractor. If you have an old standard extractor lying around try it to rule out a problem with the Aftec and go from there. Haha the short history is it has ran great since he got it a fewmonths ago (3k rounds?) and ran good for the first two or three stages yesterday, then it went kaput. Seemingly out of the blue complete failure. Jim: let me know what ends up happening when you test it, i have an extra 10 pound as well (but I'm sure Al has one and he's a lot closer to you)Sent from my SM-G930V using Tapatalk Link to comment Share on other sites More sharing options...
Gooldylocks Posted March 26, 2017 Share Posted March 26, 2017 Some history on the gun ? Was it running good before, did you change something, etc.. Twelve pound spring is on the heavy side. Make sure the extractor is fitted properly and the tunnel is clear of gunk, my first thoughts would be the ejector or extractor, but especially the extractor. If you have an old standard extractor lying around try it to rule out a problem with the Aftec and go from there. Haha the short history is it has ran great since he got it a fewmonths ago (3k rounds?) and ran good for the first two or three stages yesterday, then it went kaput. Seemingly out of the blue complete failure. Jim: let me know what ends up happening when you test it, i have an extra 10 pound as well (but I'm sure Al has one and he's a lot closer to you)Sent from my SM-G930V using Tapatalk Link to comment Share on other sites More sharing options...
Sarge Posted March 26, 2017 Share Posted March 26, 2017 (edited) Steel grip? If so, My gun went through this last year. After trying all of the above and spending hundreds of dollars my gunsmith found the MSH was full of rust and it was literally almost locking the gun up. This caused the gun to barely eject as well as not completely resetting the trigger. Edited March 26, 2017 by Sarge Link to comment Share on other sites More sharing options...
sitw Posted March 26, 2017 Share Posted March 26, 2017 Sarge So there was a ton of drag in the mainspring housing due to rust? Darn, always learning. Too bad at so much of your expense. Link to comment Share on other sites More sharing options...
Gooldylocks Posted March 26, 2017 Share Posted March 26, 2017 Delete Link to comment Share on other sites More sharing options...
Steelix Posted March 26, 2017 Share Posted March 26, 2017 Wow good to know about steel grip and MSH. I'm about to buy a CK arms gun this week and see 2 of there guns broke in one weekend has me rethinking. But I still think best bang for your buck. Link to comment Share on other sites More sharing options...
Unibrain Posted March 26, 2017 Author Share Posted March 26, 2017 (edited) Borrowed / stole a new 9lbs variable wolf spring and things seem to be better. Ran 100 rounds through the Gun without issue and getting a nice ejection. Between yesterday and today also removed/cleaned the Aftec, inspected everything, and put the aftec back to a single spring for apples to apples comparison with when the Gun started to FTE. 2 hours ago, Sarge said: Steel grip? Nope. I reviewed video from last weekend and everything was fine. Stage 1 from yesterday was fine but by stage 3 the ejection was weak. Stage 4 the malfunctions started. Note to self: 3000 rounds on the recoil spring is a little too much. Edited March 26, 2017 by Unibrain Typo Link to comment Share on other sites More sharing options...
Gooldylocks Posted March 26, 2017 Share Posted March 26, 2017 Called it! Glad you got it figured outSent from my SM-G930V using Tapatalk Link to comment Share on other sites More sharing options...
Sarge Posted March 26, 2017 Share Posted March 26, 2017 1 hour ago, sitw said: Sarge So there was a ton of drag in the mainspring housing due to rust? Darn, always learning. Too bad at so much of your expense. The MSH was actually full of rust and rust dust. Had a pile of dust to show me. The strut would get bound up. The spring was almost a solid mass of rust. I have no idea how it happened as the gun had never been wet in my possession. I admit it made me want to ditch the steel grip even more. I was worried hot cold conditions ? may have moisture condensing in there? Anyway I changed to plastic grip just like my other gun. CK are fine guns. Not sure what the recent problems are due to but my situation was some kind of fluke. Runs good now. Link to comment Share on other sites More sharing options...
Sarge Posted March 26, 2017 Share Posted March 26, 2017 15 minutes ago, Unibrain said: Borrowed / stole a new 9lbs variable wolf spring and things seem to be better. Ran 100 rounds through the Gun without issue and getting a nice ejection. Between yesterday and today also removed/cleaned the Aftec, inspected everything, and put the aftec back to a single spring for apples to apples comparison with when the Gun started to FTE. Nope. I reviewed video from last weekend and everything was fine. Stage 1 from Rasay was fine but by stage 3 the ejection was weak. Stage 4 the malfunctions started. Note to self: 3000 rounds on the recoil spring is a little too much. I generally start getting little indicators when my recoil spring is getting weak. Spread out over 2-3 matches. I have never heard of a recoil spring just throwing its hands up in surrender and quitting like yours! Link to comment Share on other sites More sharing options...
Unibrain Posted March 26, 2017 Author Share Posted March 26, 2017 16 minutes ago, Sarge said: I have never heard of a recoil spring just throwing its hands up in surrender and quitting like yours! The first two stages were surrender starts ... I'm glad it was something simple. I'll try to pay more attention to see if I can catch the early signs of failure. Link to comment Share on other sites More sharing options...
MikeBurgess Posted March 26, 2017 Share Posted March 26, 2017 Glad to hear you got it running again, see you in St George Sent from my SAMSUNG-SM-G935A using Tapatalk Link to comment Share on other sites More sharing options...
Ultimo-Hombre Posted March 26, 2017 Share Posted March 26, 2017 I understand you have fixed the problem, well done! for others who read this... I wouldn't be afraid to get ahold of Bobby early on in the process of troubleshooting a CK gun. I did and he answered fast with a fix. Link to comment Share on other sites More sharing options...
Steelix Posted March 26, 2017 Share Posted March 26, 2017 Yes glad you got your gun up and running again. Good luck to you. Link to comment Share on other sites More sharing options...
Unibrain Posted March 26, 2017 Author Share Posted March 26, 2017 1 hour ago, Ultimo-Hombre said: I wouldn't be afraid to get ahold of Bobby early on in the process of troubleshooting a CK gun. I dropped them a note this afternoon via the Facebook page. Being the weekend I didn't expect a response and tried the forum first. Link to comment Share on other sites More sharing options...
Sarge Posted March 26, 2017 Share Posted March 26, 2017 40 minutes ago, Unibrain said: I dropped them a note this afternoon via the Facebook page. Being the weekend I didn't expect a response and tried the forum first. Bobby is probably on the way home from Nationals too. Link to comment Share on other sites More sharing options...
Unibrain Posted March 26, 2017 Author Share Posted March 26, 2017 And CKarms responded in less than an hour Link to comment Share on other sites More sharing options...
Aircooled6racer Posted March 26, 2017 Share Posted March 26, 2017 Hello: something still seems amiss here. If the spring was worn it would actually be weaker causing the ejection to be more violent and ejecting them further away. At least that is what usually happens. Could your reloads be light on power factor? Did you compare the old and new spring you put in? Thanks, Eric Link to comment Share on other sites More sharing options...
ano Posted March 26, 2017 Share Posted March 26, 2017 Im with aircooled6racer on this. Link to comment Share on other sites More sharing options...
Unibrain Posted March 26, 2017 Author Share Posted March 26, 2017 50 minutes ago, Aircooled6racer said: Could your reloads be light on power factor? Did you compare the old and new spring you put in? Thanks, Eric The loads are from the same batch so I don't think they could be drastically different. They normally chrono with a SD less than 10 fps. The free length of the old and new spring are the same. I have a gauge that should be here later in the week and I'll measure. Maybe it was something else but I'm at a loss to know what. The top end was apart and reassembled several times and nothing helped until the 12lbs then the 9lbs spring. Could have been a coincidence but swapping the spring made it better. Link to comment Share on other sites More sharing options...
ano Posted March 26, 2017 Share Posted March 26, 2017 last time for me, my seating die had moved and oal was looong Link to comment Share on other sites More sharing options...
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