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Excess B/C Gap on .45ACP Vaquero Cylinder

This is a discussion on Excess B/C Gap on .45ACP Vaquero Cylinder within the Ruger Single Action forums, part of the Pistol & Revolver Forum category; I have an older polished stainless Vaquero in .45LC. A couple of years ago I found a blued ACP cylinder that indexes perfectly. But, it ...


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Old April 21st, 2017, 04:06 PM   #1
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Excess B/C Gap on .45ACP Vaquero Cylinder

I have an older polished stainless Vaquero in .45LC. A couple of years ago I found a blued ACP cylinder that indexes perfectly. But, it has .008 B/C gap, which I know Ruger would consider to be in-tolerance. It has what appears to be about .002 endshake/fore and aft play in the cylinder. I think I could place a .002 shim at the rear of the cylinder, which would close up the B/C gap a little and shouldn't be a show-stopper for headspace.

But, I have a dumb question: TriggerShims sells two cylinder shim sizes - one for Single-Sixes and one for large-frames. I'm thinking, always a scary thought, that I should order the smaller size in order to preclude any problems with the hand/pawl running up against a shim in the back? Or, should I order the larger size? I think the base pins are the same diameter for both Single-Sixes and Vaquero/Blackhawks - but I'm not sure ... If the basepins are a different diameter then I just made an idget of myself ...



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Old April 21st, 2017, 04:22 PM   #2
 
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Quote:
Originally Posted by GeoJammy View Post
I have an older polished stainless Vaquero in .45LC. A couple of years ago I found a blued ACP cylinder that indexes perfectly. But, it has .008 B/C gap, which I know Ruger would consider to be in-tolerance. It has what appears to be about .002 endshake/fore and aft play in the cylinder. I think I could place a .002 shim at the rear of the cylinder, which would close up the B/C gap a little and shouldn't be a show-stopper for headspace.

But, I have a dumb question: TriggerShims sells two cylinder shim sizes - one for Single-Sixes and one for large-frames. I'm thinking, always a scary thought, that I should order the smaller size in order to preclude any problems with the hand/pawl running up against a shim in the back? Or, should I order the larger size? I think the base pins are the same diameter for both Single-Sixes and Vaquero/Blackhawks - but I'm not sure ... If the basepins are a different diameter then I just made an idget of myself ...
I may be the IDGET here but doesn't the shim go at the front (barrel end) of the cylinder?
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Old April 22nd, 2017, 03:44 AM   #3
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Hossbreed, you, indeed sir, are correct - at least I think that is normally the case. But, the boss is roughly the same size on both ends of the slender ... ... so I think it'll work on both ends. And, thus my question ... If Rooger would just fit extra cylinders this whole thing would be a moot point...
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Old April 22nd, 2017, 05:14 AM   #4
 
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GeoJammy,

There's no dumb questions here and I have some thoughts:

1. The usual problem with cyl end play is that the cyl is allowed to move forward and can cause the cyl to rub on the barrel but your generous .008" gap will preclude that from happening. Therefore mitigation isn't really isn't

2. The shims on the ratchet end of cyl will solve both the bar/cyl gap and cyl end play issues. .002" added to the headspace is negligible and will not be a problem. The small size shims will work well. But a bit of a pain to install every time you remove the cyl.
Unless you could solder it or super glue it in the recoil shield.

3. You wouldn't want to send it to Ruger if even if they would fit it for you. Without the labor and cost of cyl, just shipping there and back is $100.
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Old April 22nd, 2017, 07:34 AM   #5
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Hondo - Thanks sir for your words of assurance! I thought about (checking first then) super gluing a shim to the ACP cylinder. Lance/TriggerShims costs are so reasonable that I'm ordering a set today. Completely unrelated - I keep seeing the Dishonorable Discharged on some people's profiles ... ??
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Old April 22nd, 2017, 04:40 PM   #6
 
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Perhaps red Loctite?
I believe there is one version which is more heat-resistant than the normal red.
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