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Post by 470evans on Jun 29, 2020 12:56:37 GMT -5
Well, interesting to me at least!
I ordered a pin gauge set last week to check for thread choke and measure the throat diameters in my 45 Colts. I had read Fermin's article on using pin gauges instead of slugging the bore to check for thread choke and it made sense so I thought I'd try it. (I really don't have anything better to do in case you are wondering)
So the pin gauge set arrived this am and I got to work.
I measured the following 45 Colts:
1999 Vintage Ruger Stainless Blackhawk - 45 Colt
- All six throats took a .450 pin gauge. Need to send this one off to open the chamber throats. Any recommendations? - A .443 pin gauge slid all the way through the barrel so no thread choke
2013 Vintage Ruger Stainless Bisley Blackhawk - 45 Colt
- All six chambers took a .452 pin gauge (I had had this cylinder opened up so I was expecting this) - A .443 pin gauge slid all the way through the barrel so no thread choke
2019 Vintage Standard Manufacturing SA - 45 Colt
- All six throats took a .451 pin gauge - A .442 pin gauge slid all the way through the barrel so no thread choke
2007 Vintage Colt SA - 45 Colt
- All six throats took a .456 pin gauge  - A .442 pin gauge slid all the way through the barrel so no thread choke
I was glad to see none of these guns had any thread choke and the chamber throats were all consistent. |
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Post by leadhound on Jun 29, 2020 13:07:05 GMT -5
Fermin can open up your cylinders for you. He did mine! Fantastic job on all of them, sadly I have yet to shoot them, work constraints, but I do have another batch I will be sending him. I sent him 4 and were back in just a few days, that was with the weekend in the way. He is also excellent with keeping you updated and informed.
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Post by contender on Jun 29, 2020 17:11:24 GMT -5
I second the use of Fermin as a source of opening up a cylinder properly.
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aware
.240 Incinerator
Posts: 73
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Post by aware on Jun 29, 2020 17:22:02 GMT -5
Where did you wind up ordering the pin gauge set from?
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Post by 2 Dogs on Jun 29, 2020 17:33:28 GMT -5
You have a PM Sir! Thanks for your great post.
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Post by 470evans on Jun 29, 2020 17:58:29 GMT -5
Where did you wind up ordering the pin gauge set from? Hello Aware,
I don't like ordering much off Amazon but this is where I found this set. I got the 0.251- 0.500 minus set.
The other sets I looked at were 2-3 times the $$
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Post by mike454 on Jun 29, 2020 18:09:17 GMT -5
You got lucky on the Colt SAA.  My colts, including an Anaconda went .457-.458 |
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aware
.240 Incinerator
Posts: 73
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Post by aware on Jun 29, 2020 18:10:04 GMT -5
Where did you wind up ordering the pin gauge set from? Hello Aware,
I don't like ordering much off Amazon but this is where I found this set. I got the 0.251- 0.500 minus set.
The other sets I looked at were 2-3 times the $$
Thank you. |
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Post by wheelguns on Jun 29, 2020 18:28:14 GMT -5
I got a set of myers minus pin gauges from ebay. I think I payed under $100. Worth checking.
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Post by nhithaca on Jun 30, 2020 8:53:04 GMT -5
I got a pin gauge set from ENCO, direct sales. Foreign made but no issues. Each gauge is wrapped in a light oil soaked paper so just peel back half of the paper to check chambers. Never had any rust problems.
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Post by leadhound on Jun 30, 2020 10:45:41 GMT -5
Where did you wind up ordering the pin gauge set from? Hello Aware,
I don't like ordering much off Amazon but this is where I found this set. I got the 0.251- 0.500 minus set.
The other sets I looked at were 2-3 times the $$
I have this same set, as they are minus, have found all that I have used to be, .0005 undersize, round and no taper, as checked with calipers and micrometer. Good enough for me anyway! |
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My colts, including an Anaconda went .457-.458