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Thread: Mossberg 500 bolt question

  1. #1
    Boolit Mold Byrd's Avatar
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    Mossberg 500 bolt question

    I recently acquired a pre 68 Mossberg 500AT that was left neglected in a hoarders home. It has gotten wet and of course rusted. I was able to clean the barrel and innerds but have a problem with the bolt. The extractors are rusted and won't freely move. I've soaked them in PB Blaster, but can't get the pin to remove them to budge.

    Will a newer bolt be compatale? This is one with the single action bar instead of the newer double. Complete bolts and carriers are available on EBay reasonably, but will they fit the older shotgun?
    From Above Only, And Not Beneath!

  2. #2
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    Winger Ed.'s Avatar
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    Call Mossberg. They should be able to answer that.
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  3. #3
    Boolit Master
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    Degrease it well first, then soak it overnight (or a day or 2) in Evaporust.
    Works like magic, wont harm steal, just eats only the rust.

    You can get it online, at Harbor Freight, or I believe Home Depot or Lowes or
    probably any hardware store.
    You can re-use the solution pretty much indefinitely, it still works fine even when cloudy/dirty.
    Last edited by edp2k; 05-28-2020 at 06:46 PM.

  4. #4
    Boolit Master


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    You need to degrease the part well to get the best results!

  5. #5
    Boolit Master
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    I have used soaking small parts hot water and citrus acid to clean rust off , after a good cleaning - oiling is necessary .
    But about bolt interchangeable ???????

  6. #6
    Boolit Mold Byrd's Avatar
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    I've never tried Evaporust, I'll give it a try. I did use an ultrasonic cleaner on it but that didn't do I except boil out crud.
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  7. #7
    Boolit Master
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    Try 50-50 mixture of ATF and acetone.

  8. #8
    Boolit Master RU shooter's Avatar
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    Drill out the old pins if they won't come out I doubt there some special hardened steel
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  9. #9
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    Try reverse electrolysis. You may need it to go for a week ,but it should work.
    The solid soft lead bullet is undoubtably the best and most satisfactory expanding bullet that has ever been designed. It invariably mushrooms perfectly, and never breaks up. With the metal base that is essential for velocities of 2000 f.s. and upwards to protect the naked base, these metal-based soft lead bullets are splendid.
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  10. #10
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    Evaporust is the bomb. Works VERY well. Just try it.
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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