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Thread: sticking cases

  1. #1
    Boolit Bub

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    sticking cases

    I have a falling block works chambered in 219 zipper and the cases stick after firing on some hotter loads. Not maximum loads. The head space is minimum like .oo1. Will very small headspace on rimed cartridges cause sticking? The chamber is clean and the cases are carefully made from Winchester 30-30 cases and very clean.

  2. #2
    Boolit Master
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    IME, sticky cases are due to a single cause; the load is too hot.

    When you say your loads are not maximum; what are you basing that on? If you mean book max you need to pay more attention to your rifle and less attention to your book.

  3. #3
    Boolit Buddy 414gates's Avatar
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    Sticky extraction is a hot load. The question is why.

    Is the load data from a load manual, or did someone tell you what to load ?

    If someone told you, check it against a load manual.

    If you are within the parameters of the load data in a load manual, and the load is too hot, check a couple of things.

    When cases are made from other brass, you inherit the brass thickness. If 30-30 brass is thicker, and you make 219 Z from it, you end up with less case capacity, which can increase pressure.

    Also, the neck wall thickness may increase when sizing down, increasing bullet tension.

    Are you able to drop a bullet into the fired case ? it should cleanly fall to the bottom.

    How thick is the neck wall ?

    Measure the case neck diameter after sizing. Neck diameter - [ 2 x neck wall thickness ] should be a few thou less than bullet diameter.

    What is the case AOL ?
    Last edited by 414gates; 11-29-2021 at 03:03 AM. Reason: addendum

  4. #4
    Boolit Master marlinman93's Avatar
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    I've had the same issue occasionally over decades of reloading, and always it's a load that is too hot. But also it's not uncommon to see this when data I used didn't seem to be in the max range, just a little hotter than mid levels.
    I just backed off my charge until extraction was fine, and never went higher again on my loads.

  5. #5
    Boolit Master
    Bent Ramrod's Avatar
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    Tapered bottleneck cases tend to lengthen on firing. The warmer the load, the more the tendency. The longer neck begins to extend into the leade of the chamber, pinching the bullet and making release harder. The same powder charge that worked fine at the beginning will begin to show pressure signs as the shells are reloaded over and over.

    I have a .22 Hornet that started expanding and smudging primer pockets until I started a program of measuring case lengths and trimming after every firing. The problem went away after that.

  6. #6
    Boolit Master marlinman93's Avatar
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    Twist rate of the barrel will also have something to do with pressure too. Need to be sure the data used lists twist rate, and matches what your gun is.

  7. #7
    Boolit Master
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    Load's too hot, back off a grain or two. Just 'cause it's in a book doesn't mean it isn't too hot for a particular rifle....evidently yours is one of those. Seen it before.
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  8. #8
    Boolit Master
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    I have a 219 AI Zipper on a High Wall. According to Ackley it should about equal a 22-250. I can assure you it does not. I tried to load Ackley's listed loads and they would stick every time. I backed off until I had normal extraction and now I have a 223 equivalent with a rim. The only other time I had sticky extraction using published loads was with my 375 H&H. It turned out the dies were not sizing the very base of the case as they should. After being loaded and fired multiple times the base would expand just enough to cause the cases to stick.

    As pointed out by others difficult extraction almost always means the pressure is too high. If you're using current published data you may have to look at all the case and load parameters to discover the cause.
    BIG OR SMALL I LIKE THEM ALL, 577 TO 22 HORNET.

  9. #9
    Boolit Master

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    Ran into two factory rifles that would stick with factory ammo. One was a lever action and the other a bolt action. Both did not have enough throat causing high pressure. When you get a 30-30 with a flattened primer you, know there's to much pressure.

  10. #10
    Boolit Master Castaway's Avatar
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    All good advice above, but have you checked to see if the chamber has been ringed?

  11. #11
    Boolit Master
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    Here is a weird one for you I have one rifle that has sticky extraction and it's a low pressure black powder round. I only figured it out after owning the rifle for several years. The chamber was cut with a rim diameter a little under spec. On some cases the rims are right at max diameter. Those particular cases stick every time because when the block closes it forces that rim into the undersized chamber recess which requires more effort to extract.

    Chris.

  12. #12
    Boolit Grand Master Char-Gar's Avatar
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    Every rifle has a different notion of what is a "Maximum Load".
    Disclaimer: The above is not holy writ. It is just my opinion based on my experience and knowledge. Your mileage may vary.

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check