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Showing results for tags 'Failure to feed'.
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Hello, Recently, I sent a brand new Tanfo Stock II over to Patriot Defense for their patented tuneup and barrel reaming. They also installed the extended firing pin, titan hammer, bolo, one piece sear, and Xtreme trigger. Out of the box the trigger was PHENOMENAL, both in DA and SA. Unfortunately, the first range trip was plagued with failure to feeds, and a weird "ca chunk" whenever the slide cycled. After perusing the forums here, it seemed I needed to chamfer off the breechface edge and polish the breechface. I got in contact with PD and they confirmed it was probably the breechface edge issue and gave the go ahead to chamfer the edge while also telling me Tanfo's need a 1000 rounds to break in. They even stated there were no issues when it was test fired at their facility? I chamfered off the edge and breechface little by little like everyone suggested until the failure to feed issue stopped, but the "ca chunk" continued. Thinking this issue stemmed from the wolff 8lb standard recoil spring, I tossed in a wollf 10lb standard spring to no avail and a factory 14lb spring which yielded the same result. After noticing weak ejection with softer ammo and sometimes rounds getting stuck with the slide out of battery, I bought a new extractor with the (9) stamp and an XP extractor spring to cross this off the list (the original had a bunch of machining marks and no (9) stamp). Next range trip, the "ca chunk" continues and within 100 rounds two were somehow stuck in the chamber while the slide was 1/8"- 1/4" out of battery. I had to take the gun apart to get the rounds out since the slide was stuck. This makes me think there is something wrong with the barrel after it was reamed, maybe. The mags I am using are brand new K9s. The issue happens with all mags (12) and all ammo. Everyone that has seen it in slow mo and shot it agrees it's not cycling right. Any thoughts?? -
Hoping for help with ongoing failure to feed problem with tanfo 9mm stock II
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Can you guys please help me diagnose my Failure to Feed issue that I witnessed today during practice. The rim of the case did not rise up and under the extractor. I shot roughly 150 rounds prior to failure and another 200 after it without any failure what so ever. Gun was thoroughly cleaned and extractor w. spring was replaced prior to the practice. I changed the extractor since during my last match I got a failure to eject and also during an recent practice. Facts, CZ 75 SP-01 Shadow 11 lbs recoil spring (CZUB) used for ~10k 13 lbs main spring same usage New extractor & spring (changed before practice) Regular SP-01 18rd mags with springs that have been used for ~15k Chamber is nice and shiny. Factory ammo. The new extractor does not bind or feel rough during the loading action, not even if I slowly assist the slide forward when loading. Everything is smooth. Can it be that the mag springs are getting old? Can it be that the recoil spring is getting old? Can the extractor be sitting to shallow, need to remove some material from the extractor "depth pad"? Combination of above? I do not think that I bumped the slide stop lever, this might induce problems during slide reciprocation. I've had problems with that earlier due to really high support hand grip. The attached picture of the recoils spring is old vs new (11 lbs czub).
