RDB Failure to Feed

Discussion in 'RDB Bullpup Rifle' started by Kemo3425, Aug 20, 2019.

  1. likho1eye

    likho1eye Active Member

    88
    Nov 15, 2019
    Why it happens with one mag but not the other I don't know, could be just luck of the draw. But I would first make sure that the consistent failure with PMAG you describe isn't simply double feed due to initial failure to extract.
     
    FredleyBanyon likes this.
  2. FredleyBanyon

    FredleyBanyon Member

    19
    Nov 10, 2019
    I don't always rotate up and "thumb/slap" the charging handle when racking a new round but I make sure to pull the handle all the way to the rear and release it. Those pushed in bullets are from me trying to rack another round with the previous jam, user error. The jams are mostly caused after firing a single round and then "click" - jammed round.

    My suspicion is that there is something going on with the feeding ramp and changing between magazine sizes may exacerbate this problem. It always seems to be the second round that jams (i.e., the right fed round is fired and the left fed round gets jammed on the feeding ramp).
     

  3. WolfWings

    WolfWings Well-Known Member

    298
    Feb 19, 2020
    Kansas City
    Yeah my thinking was if the first round wasn't chambered "hard enough" for the extractor to latch onto the bullet then it'd fire... next round gets pushed in instead because the old round wasn't extracted.

    It gets better with use as the extractor spring gets enough cycles on it to be a bit more reasonable for spring rate I think, but yeah if the push-ins were from manually trying to rack a new round before realizing there was a jam/FTE then ignore me entirely on that one.

    Hopefully it behaves smoothly when you get it back from KT! :)
     
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  4. FredleyBanyon

    FredleyBanyon Member

    19
    Nov 10, 2019
    I've shot at least 500 rounds through this rifle, so it's past its initial break-in phase. Adjusting the gas system didn't help. It's about time to have Keltec figure out what's going on, however much it sucks to ship a new rifle across the country.
     
    iamscottasus likes this.
  5. FredleyBanyon

    FredleyBanyon Member

    19
    Nov 10, 2019
    Following up on my RDB-C. I sent it in to KelTec for repair on 5/4 and had it returned on 5/17 (fast turnaround! Shipped from CA). The service notes on the Repair Order are as follows:

    -Replaced bolt head assembly and picatinny screws
    -Added loctitie to picatinny screws
    -Upgraded trigger spring
    -Inspected and fired with no malfunctions
    -Gas set at +8 with 55gr .223 Fiocchi.

    I was finally able to take the RDB-C to the range today, now that it's open again, and did not have a single failure to feed or jam. I was using both my 10 round Pmag as well as the 30 round Pmag. I'm so happy that Keltec was able to fix it and get it to 100%. Only time will tell if the rail becomes loose again. Great experience with Keltec and my faith in the reliability of the RDB-C is fully restored.
     
  6. dazed

    dazed Active Member

    43
    Jun 9, 2020
    After a less-than-confidence-assuring buying experience on Gunbroker being sold a 2 year old RDB, and after reading forum post after forum post about inconsistent FTF and FTE issues, and then having issues with even finding any ammo, I finally got my RBD17 out to a "range" to put some rounds though her, and finally see if it had any of the issues some seem to have had.

    I was talking to a friend, and mentioned that I couldn't find anything local, he says "hey, I've got thousands of rounds, have a pile", and he gives me about 60 ... idk what they were, and when I asked him, he didn't either. "I think they're 62g? IDK, don't remember, I just dump it all into bins... but this'll get you started."
    Got a couple boxes of overpriced($24/20!) Remington Core-Lokt Ultra Bonded 62gr.
    Got several boxes of cheapo CMG 55gr FMJ ($8).

    A Magpul 30 and a 20, and a steel 10 round mag, all ran through the whole pile without a hiccup, no gas adjustment from factory recommended of -5, no FTE/FTF. Ran smooth as a sewing machine. The only screws that walked out at all were the ones that hold on the butt-pad.
    I couldn't be happier with my purchase.
     
    Last edited: Jul 6, 2020
  7. iamscottasus

    iamscottasus Well-Known Member

    Feb 21, 2014
  8. dazed

    dazed Active Member

    43
    Jun 9, 2020
    Haha, not sure if you're being sarcastic about my no-issue post. ;)
    Mostly I wanted to add the info here to reassure people researching the rifle. This post and forum in general, are some of the first places that come up in goog searches re: the reliability of this rifle, so I just thought I'd add a bit of positive to balance the worries.
     
  9. iamscottasus

    iamscottasus Well-Known Member

    Feb 21, 2014
    I am truly very happy to hear from a happy shooter
     
    odinforever2000, socrates and dazed like this.
  10. Eric Nagle

    Eric Nagle Member

    1
    Jun 15, 2020
    Same thing is happening to me. Just got my RDB-C. It’s my first rifle. Using Pmags and lancer 10 rd. My problem seems to be on chambering the first round. If I don’t do it just right, not to hard not too soft, it doesn’t fire and bends a round.
     

    Attached Files:

  11. iamscottasus

    iamscottasus Well-Known Member

    Feb 21, 2014
  12. odinforever2000

    odinforever2000 Well-Known Member

    361
    Oct 6, 2011
    Yea..If its on chambering the round..You need to send it back to Keltec.
     
  13. iamscottasus

    iamscottasus Well-Known Member

    Feb 21, 2014
    I w hand cycling my action and trying the take down pins in various positions.
    I found that upside-down, the bolt face will not rotate fully and stop on the barrel extension face. Then with a pin removed it locks up fine. There is a lot of slop between the rails and the bolt carrier.
     
    Last edited: Aug 16, 2020
  14. Specialist05

    Specialist05 Member

    5
    Aug 16, 2020
    I have this same issue. I have not had time to research it, but it bends bullets just like in everybody’s images!
     
  15. Specialist05

    Specialist05 Member

    5
    Aug 16, 2020
    I’m pretty disappointed, I have never bought a firearm that did not work at all! That’s crap. What if I had to defend myself?!? I got it!!!! Throw it!
     
  16. Specialist05

    Specialist05 Member

    5
    Aug 16, 2020
    I recently bought mine new, I would think keltec would have worked out the issues since all these posts of sending them back for service! I’ve only had one worse fire arm, an Italian Guisepi pistol!
     
  17. Specialist05

    Specialist05 Member

    5
    Aug 16, 2020
    F54D6443-BD3D-4CE8-91F5-A3F33BCE2E4C.png Re the Keltec, this picture tells it all, notice poor angle of feed and bullet brass left on the entry.
     
  18. iamscottasus

    iamscottasus Well-Known Member

    Feb 21, 2014
    When KT services the RDB, they usually polish the feed ramps as part of any functioning solution.