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Thread: 1911 Mainspring Housing Hole Size

  1. #1
    Boolit Master


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    1911 Mainspring Housing Hole Size

    I bought a Kolimous, not sure of the spelling, checkered mainspring housing with an attached mag funnel off EBay and the hole for the spring and plungers was too small!

    I started to just enlarge the hole bit it is a really odd size!

    The workmanship on this part is beautiful!

    To return it I just downloaded a post paid label and got a refund in less than 24 hours!

  2. #2
    Boolit Grand Master Char-Gar's Avatar
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    Welcome to the world of aftermarket 1911 parts. I bought a mainspring housing that was too small to use the Colt spring and plunger. I just bought a new spring and plunger from the maker of the housing and everything went together just fine. While I was at it, I went to a 19 lb mainspring. Drops the trigger pull down some and will still pop every primer known to mankind.
    Disclaimer: The above is not holy writ. It is just my opinion based on my experience and knowledge. Your mileage may vary.

  3. #3
    Boolit Master


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    This one came with the spring and it did not fit!

  4. #4
    Boolit Grand Master Char-Gar's Avatar
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    Quote Originally Posted by deltaenterprizes View Post
    This one came with the spring and it did not fit!
    Well, if their spring won't fit their mainspring housing, I would say they have a quality control issue.
    Disclaimer: The above is not holy writ. It is just my opinion based on my experience and knowledge. Your mileage may vary.

  5. #5
    Boolit Grand Master

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    Drill ream and polish in the shop for fastest ignition.

  6. #6
    Boolit Master


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    Quote Originally Posted by Char-Gar View Post
    Well, if their spring won't fit their mainspring housing, I would say they have a quality control issue.
    I agree!

  7. #7
    Boolit Master


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    Quote Originally Posted by KCSO View Post
    Drill ream and polish in the shop for fastest ignition.
    I was thinking about doing that but the odd sized reamer would cost almost as much as the part!

    It was easier to print a postpaid label and return the defective part and order another one!

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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