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Thread: Uberti 1866 Yellow Boy case problem

  1. #1
    Boolit Master dikman's Avatar
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    May 2013
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    Sth Oz - A Land Downunder
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    Uberti 1866 Yellow Boy case problem

    Some may remember I had a problem with some cases jamming on extraction. After much trial and error I finally kept separate a few of the tight cases and measured them with a micrometer (it was a bit iffy as the cases were a bit out-of-round from bouncing on a concrete floor). There seemed to be some variation in measurements at the rim end and the mouth end, so I pulled the barrel and had a fellow member who does gunsmithing have a look at the chamber. He measured a variation of 2.5 thou. between the ends of the chamber! The rifling end of the chamber was 2.5 thou. bigger than just inside the breech end!! No wonder some of the cases were tight. He ran a boring bar down, skimming just enough to make it uniform.

    Guess it wasn't a good day at the Uberti factory when mine was made .

  2. #2
    Boolit Master
    Join Date
    Dec 2013
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    St.Germain, WI
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    Mine was made with soft steel for the cams. They mushed right over with what is known as plastic deformation. Uberti made it right though by sending me free replacement parts. Rifle hasn't missed a beat in years now.
    The only amendment the Democrats support is the 5th.

  3. #3
    Boolit Master dikman's Avatar
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    Works fine now. I had one case that felt a little tight, and interestingly I had a couple of cases that were very tight to remove from my (new to me) Ruger Vacqueros. Looks like I've got one or two iffy cases.

  4. #4
    Boolit Master
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    Mar 2007
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    Red Deer Alberta
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    I read the Vacqueros have .427 cylinders and .429-.430 barrels.The cure Ruger fails to acknowledge is having the cylinder reamed to match the barrel.

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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