Author Topic: Function test of Yellow Boy  (Read 452 times)

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Offline mazo kid

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Function test of Yellow Boy
« on: April 11, 2018, 12:47:40 PM »
A few days ago I decided to function test my '66 Uberti. I didn't have any boxed up ammo but did find a cartridge near the reloading bench. I loaded that through the loading gate (Winchester calls it the ladle), racked lever down, cartridge popped onto lifter, racked lever up to chamber.....UH-Oh!  {:( Evidently the reason that cartridge was never boxed up was because it wasn't FL sized! Now I have a jammed receiver. Went on-line and took a crash course in "1866 disassembly 101".  You definitely want good gunsmith screwdrivers for this as those screws are in there tight! In the meantime I did reload a few cartridges. Yesterday I took the rifle down, cleared the jam, polished off some burr edges on some parts with my HF diamond Swiss file set, lubed rubbing parts and re-assembled the rifle. I "proved the cartridges" with my Lyman multiple cartridge test block and slipped 3 cartridges into the magazine. Those cartridges did chamber, but took a lot of effort. Ejected great. So now my question is: are these guns finicky about what they will digest? OA cartridge length? The bullets were from Missouri Bullet Company, 140 grain SWC Cowboy Action #14. I just bought a box of factory loads so will try those today. Before I got this gun I was reading about it on a couple of cowboy action forums; it sounded to me like guys were shooting round nose ammo in them. In my rifle-cartridge lever guns, I shoot RNFP ammo to avoid recoil setting off any ammo in the magazine. Evidently recoil isn't great enough in a 38 Spl. to do this? Those of you who have this gun, I would like to hear of your experiences.

Offline AntiqueSledMan

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Re: Function test of Yellow Boy
« Reply #1 on: April 11, 2018, 05:10:08 PM »
Hello Mazo,

I shoot a Rossi Puma, .357 with Lyman 358156 155gr SWCGC with no issues.
My son shoots a Marlin Cowboy with the same, no issues either.


Offline mazo kid

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Re: Function test of Yellow Boy
« Reply #2 on: April 12, 2018, 12:27:01 PM »
Yep, I have 2 early (pre-safety) Rossi '92s, 44-40 and 45 Colt, also a '73 Uberti 45 issues with any of them. My next action will be to thoroughly clean and polish the chamber in the '66. I'm hoping that will clear up the problem! M__

Offline mazo kid

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Re: Function test of Yellow Boy
« Reply #3 on: April 12, 2018, 04:06:55 PM »
I had checked the bore of the carbine when I got it, everything bright and shiny there. I just checked the chamber and there was a tiny patch of surface rust  {:( luckily no pitting. I polished it up with 0000 steel wool wrapped around a bore brush. Things are working much better now. May have to a bit more polishing to make sure everything is clean.

Offline prof marvel

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Re: Function test of Yellow Boy
« Reply #4 on: April 13, 2018, 02:30:33 AM »
Greetings My Dear Mazo -

My experience with my 1866 Yellowboy is limited to .45 Colt, but they are essentially identical.

OAL is not as usually "critical" within limits. The lifter allows for some slop as does the feed mechanism.
In order to shoot drastically shorter cartridges you would need a modified lifter.

Effort? not sure, as it is always individual perception, but mine definitely needs the whole hand inside the lever and without a glove
my poor delicate writer's hand would get all sore  (&N  .... I got all soft wince I stopped rough framing and blacksmithing  :9)

In ANY tube magazine, I always use flat noses, well, because!

But since a good flatnose offers more energy transfer ( ie: splat-down ) and those Lee roundnose flatpoint bullets look
SOOOOOOO authentically old fashioned....  A couple years ago I splurged all my lunch and coffee money for a couple months on these:

.38 125gr
.38 158 gr

.44 200 gr

.45 160 gr
.45 200 gr
.45 255 gr

.30 180 gr

.45 405 gr

I reaaaalllly like those profiles....

hope this helps

prof marvel
« Last Edit: April 13, 2018, 02:43:30 AM by prof marvel »
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