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What casues yellow powder? (Squib load)

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  • Vash357
    Junior Member
    • May 2010
    • 79

    What casues yellow powder? (Squib load)

    I've been reloading for about a year, and I got my first squib today. Much fun.

    A little background on the load first of all. This is a 357 magnum load I have used previously with great success in my S&W 686. Since I bought my equipment, powder has been rather scarce, so when I found some Alliant 300-MP in stock on powder valley a few months back, I bought an 8lbs jug of it, and 200 the only 357 bullets I could find at the time, 125gr Hornady XTPs. My Hornady load book had no info for this powder, and the Alliant page only listed a max load for Speer Gold Dot 125gr of 22.3gr. I backed that off to about 20gr, and loaded 50 rounds total in several steps up to 22gr with the XTPs, and did not see any signs of pressure. I then loaded up 50 at 22gr and shot all of these without any issues. All 50 had very similar recoil and noise.

    Most recently, I bought myself a tumbler and a case trimmer. Before I bought these, I just reused the cases dirty after measuring each with my calipers to be sure that they were under the max case length of 1.290. This time they all got tumbled after resizing for about 3 hours with corncob media and a small amount of the Frankford Arsenal quick-n-ez brass polish that came with the tumbler. I also trimmed all the cases down to 1.280 then chamfered and debured after tumbling them.

    At the range today, I fired about 15 rounds. Of those, maybe 2 felt full power like the ones I had loaded previously. Most felt a little milder. The fifth round fired felt like a 38 wadcutter, very very light. I stopped firing, unload and checked the barrel with a section of cleaning rod. That round was definitely light, but the bullet had exited the barrel. A few shots latter I had another very week recoil with very little noise, and again I checked the barrel, this time there was a bullet stuck almost exactly half way down the barrel. This happened to be in the last 20 minutes of the day that the range was open, and I had been there shooting my rifles for a couple hours already, so the day wasn't wasted, but this was still not very cool, ha.

    When I got home, I took a closer look at the revolver. This is what I saw in the forcing cone:


    And the cylinder:


    I then got a hammer and a section of cleaning rod and started tapping the squib out. When the bullet was almost out, this fell out of the barrel:


    One end:


    Other end:


    My question in all this, what can cause this? I'm assuming this is some kind of contamination of the powder or something.

    Next step to try to pull apart the 90 or so that are still loaded. This is gunna be FUN!
    Attached Files
  • #2
    <blocked>
    Member
    • May 2013
    • 247

    How much case lube do you use? How is it applied?
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    • #3
      Vash357
      Junior Member
      • May 2010
      • 79

      Carbide dies, no lube. For rifle dies I've been using a quick spray of Hornady one shot, but I've never had a problem with those. Also haven't loaded any rifle ammo since I got the tumbler though.

      Comment

      • #4
        Reelemup
        Senior Member
        • Feb 2013
        • 1392

        Looks to me you had some corn media gummed up in the casings do to the polishing liquid forming chunks in your tumbler. And that remain wet inside. Turn on your tumbler and add the polishing juice drops at a time so it can't ball up.
        Powder= black
        Corn= yellow
        Last edited by Reelemup; 01-26-2014, 6:39 PM.
        Fish molester also pick shrooms

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        • #5
          pisarski
          Senior Member
          • Aug 2009
          • 740

          looks like it got wet with lube or oil of some sort

          Comment

          • #6
            CK_32
            I need a LIFE!!
            • Sep 2010
            • 14369

            Moisture maybe? Could also explain. Why it didn't ignite.


            Even with carbide dies you should apply some lube..
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            • #7
              Vash357
              Junior Member
              • May 2010
              • 79

              Originally posted by Reelemup
              Turn on your tumbler and add the polishing juice drops at a time so it can't ball up.
              I'll do that next time for sure, I just squirted some in that time. I had thought that it would unclump and tumble out but I guess not. There wasn't any clumps when it was done.

              Comment

              • #8
                bruce381
                Senior Member
                • Feb 2009
                • 2437

                slow powder with not enough case tension and may need more crimp too.

                Comment

                • #9
                  Vash357
                  Junior Member
                  • May 2010
                  • 79

                  I uses the same crimp as last time and didn't have any problems before. I'll get a picture of the crimp later just to see what you think.

                  Comment

                  • #10
                    ironhorse1
                    Senior Member
                    • Nov 2012
                    • 1002

                    So you resized and then tumbled. Was the primer removed during resizing?

                    If so, then it is possible media was stuck in the flash hole. When that happens you get squib loads.

                    Tumble first, then resize to avoid this problem.

                    Also, clean cases are easier on the dies.

                    irh

                    Does this powder require magnum primers?
                    Last edited by ironhorse1; 01-26-2014, 7:35 PM.

                    Comment

                    • #11
                      Vash357
                      Junior Member
                      • May 2010
                      • 79

                      Yes, deprimed before tumbling. I had noticed some media stuck in the flash hole and checked for that before seating the primers. Its possible that I missed one, but I was keeping a close eye on that. Still only human though.

                      Alliant lists this powder as using a standard primer, so that's what I used. Winchester WSPs in both these and the original loads that worked fine.

                      Comment

                      • #12
                        chknlyps2
                        Senior Member
                        • Apr 2011
                        • 2191

                        Media in the flash hole is what I thought also, like ironhorse said tumble first before sizing.

                        Also, in the thousands of .357 and .38 I have done I have never trimmed a case. As long as they are consistent so you get the same crimp I would not worry about it.
                        Wanted: Spent Berdan primed Yugo 7.62x39 & 7.5x55 GP11 Swiss brass

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                        • #13
                          CK_32
                          I need a LIFE!!
                          • Sep 2010
                          • 14369

                          Originally posted by ironhorse1
                          So you resized and then tumbled. Was the primer removed during resizing?

                          If so, then it is possible media was stuck in the flash hole. When that happens you get squib loads.

                          Tumble first, then resize to avoid this problem.

                          Also, clean cases are easier on the dies.

                          irh

                          Does this powder require magnum primers?
                          Or just upgrade to SS media and avoid the problem all together
                          For Sale: AR500 Lvl III+ ASC Armor

                          What's Your Caliber??


                          My Youtube channel

                          Comment

                          • #14
                            74c5
                            Member
                            • Sep 2011
                            • 323

                            That looks like a binder, or solvent, came into contact with the powder and now you have a little tiny composite cake. I'd guess that some of the brass stuff liquid got into that case, probably others, and pissed off the powder. It is not hard to inhibit propellants. That little cake would probably light and burn but, with the rapid blowdown of the cartridge, it wasn't going to go without very high pressure......which was decreasing very rapidly.
                            Your loads should all be pulled down.
                            You can use the brass stuff but, it needs to run for awhile before you add brass and you don't need much. I do about a cap of NuFinish and let it trickle onto the moving brass while it's on.

                            It wasn't naptha because that should dissolve the powder and allow casting of the slurry.

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                            • #15
                              damndave
                              I need a LIFE!!
                              • Oct 2008
                              • 10858

                              Looks like the powder was contaminated with moisture or some sort of oil.

                              Comment

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