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Post by revolvercranker on Apr 5, 2024 13:54:01 GMT -5
Okay members, I own a Colt New Service 45 Colt manufactured in 1917 according to the serial number. I'm puzzled that the cylinder throats are .452 not .454. Back then Colt was doing that on all their 45 Colt revolvers both single action and double. My New Service has the original cylinder and the cylinder yoke and revolver's frame serial numbers are one in the same. How did this happen my cylinder throats are .452. I'm not complaining by the way. Just looking for answers.
Tony
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aciera
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Post by aciera on Apr 5, 2024 14:14:35 GMT -5
Okay members, I own a Colt New Service 45 Colt manufactured in 1917 according to the serial number. I'm puzzled that the cylinder throats are .452 not .454. Back then Colt was doing that on all their 45 Colt revolvers both single action and double. My New Service has the original cylinder and the cylinder yoke and revolver's frame serial numbers are one in the same. How did this happen my cylinder throats are .452. I'm not complaining by the way. Just looking for answers. Tony If during the War maybe the reamers have worn. Just thinking |
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470evans
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Post by 470evans on Apr 5, 2024 14:19:15 GMT -5
How are you measuring your cylinders? If you aren't using pin gauges you will not get an accurate measurement. I have six Colt 45s from that vintage, two 45 Colts, three 455s and a 1917 in 45 ACP. They all measure .456 with one exception that measures .455.
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Post by revolvercranker on Apr 5, 2024 14:20:44 GMT -5
aciera with a little bit of searching I found a post where a fellow has a 1909 New Service in 45 Colt and the barrel groove is .454 and the cylinder throats are .451!!! Seems they were all over the map back then. Thanks for your reply
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Post by 45MAN on Apr 5, 2024 14:27:28 GMT -5
I NEED TO CHECK THE THROATS ON MY 45 COLT 1909 AND A 45 COLT TARGET REVOLVER, BOTH NEW SERVICE REVOLVERS. I JUST ALWAYS "assumed" THAT THEY WERE BIG THROATED.
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aciera
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Post by aciera on Apr 5, 2024 15:21:44 GMT -5
aciera with a little bit of searching I found a post where a fellow has a 1909 New Service in 45 Colt and the barrel groove is .454 and the cylinder throats are .451!!! Seems they were all over the map back then. Thanks for your reply Handle cranker for 40 plus years. Cnc for one year. Went back because they could find cnc but no manual machinists Just remembering all the variations on one sized reamers I got for the same size. And during a war………. |
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aciera
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Post by aciera on Apr 5, 2024 15:27:15 GMT -5
How are you measuring your cylinders? If you aren't using pin gauges you will not get an accurate measurement. I have six Colt 45s from that vintage, two 45 Colts, three 455s and a 1917 in 45 ACP. They all measure .456 with one exception that measures .455. I use intermics and pins. And spring gauges. One tiny chatter and a pin won’t go in…..yet the rest is a different size. And an odd shaped hole will measure small. Spring gauge helps. Why I use all three if something doesn’t feel right Still collecting pins for boring. By .0002. Gets expensive Some folks use reamers with equally spaced flutes……so many things can screw up. Why I prefer lapping. You can read the bore then. |
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Post by revolvercranker on Apr 5, 2024 16:31:21 GMT -5
I tap an oversize lead slug through the throats from the cartridge end and then mic them.
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aciera
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Post by aciera on Apr 5, 2024 23:17:35 GMT -5
I tap an oversize lead slug through the throats from the cartridge end and then mic them. Well……could be tapered. Just been big on the butt so many times measuring things……. |
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Post by bigbore5 on Apr 6, 2024 5:10:54 GMT -5
Cerrosafe is wonderful if you know how to use it. I have made castings of every chamber in everything I own except for one so far and I'll get to that one eventually.
We use it at work and I started using it for experiments in max pressure proof testing. Just ended up numbering the chambers on all my guns and making a set of castings even on the ones that aren't for testing. Sometimes having Asperger's Syndrome causes me to obsess on something and I can't help myself.
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Post by bushog on Apr 6, 2024 8:16:36 GMT -5
Need pin guages to measure the cylinder throats.
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Post by bradshaw on Apr 6, 2024 10:42:39 GMT -5
Okay members, I own a Colt New Service 45 Colt manufactured in 1917 according to the serial number. I'm puzzled that the cylinder throats are .452 not .454. Back then Colt was doing that on all their 45 Colt revolvers both single action and double. My New Service has the original cylinder and the cylinder yoke and revolver's frame serial numbers are one in the same. How did this happen my cylinder throats are .452. I'm not complaining by the way. Just looking for answers. Tony ***** Measured a particularly beautiful .45 Colt Peacemaker with 4-3/4” barrel, made in 1897. Chamber exit holes measured .452” to .4525”. Don’t recall groove diameter exactly, but it was on the order of .451-.452”. After trying my handload of cast ,452” 255 SWC, deep-seat over 6.7/HP-38 (Win 231 under Hodgdon label) @ 20 yards, the revolver's owner set up his spotting scope and pointed to three of my Tin Man targets I’d cut for him from 1/4” mild steel. We settled on one Tin Man, which a range finder lased across his bass pond @ 190 yards. Based on my 5-shot offhand group @ 20 yards, which POI registered 8 o’clock about 2-inches to my POA, I loaded six rounds and took a Scientific Wild Ass Guess for a 1 o’clock hold on Tin Man @ 190 yards. Holding Isoceles offhand, the first shot returned a surprising and satisfying TIK. Six rounds produced 5x6 hits, spread around Tin Man’s torso. If my friend was stunned, I was elated. That was in Alabama. Soon after, in Vermont, I described the beautiful Peacemaker to a friend and occasional shooting/hunting buddy. An early Colt Model 1873 made to firm dimensions was not news to him. Which may or may not have bearing on chamber & groove dimensions of your Colt New Service. David Bradshaw |
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Post by revolvercranker on Apr 6, 2024 11:03:39 GMT -5
I'm amazed Mr. Bradshaw that cylinders were that tight for year of manufacture of that revolver. Learning learning, learning is all I can say.
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Post by 45MAN on Apr 6, 2024 11:08:09 GMT -5
I'm amazed Mr. Bradshaw that cylinders were that tight for year of manufacture of that revolver. Learning learning, learning is all I can say. YEP, STILL LEARNING - 45MAN |
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Post by marlin35 on Apr 6, 2024 12:23:42 GMT -5
Okay members, I own a Colt New Service 45 Colt manufactured in 1917 according to the serial number. I'm puzzled that the cylinder throats are .452 not .454. Back then Colt was doing that on all their 45 Colt revolvers both single action and double. My New Service has the original cylinder and the cylinder yoke and revolver's frame serial numbers are one and the same. How did this happen my cylinder throats are .452. I'm not complaining by the way. Just looking for answers. Tony ***** Measured a particularly beautiful .45 Colt Peacemaker with 4-3/4” barrel, made in 1897. Chamber exit holes measured .452” to .4525”. Don’t recall groove diameter exactly, but it was on the order of .451-.452”. After trying my handload of cast ,452” 255 SWC, deep-seat over 6.7/HP-38 (Win 231 under Hodgdon label) @ 20 yards, the revolver's owner set up his spotting scope and pointed to three of my Tin Man targets I’d cut for him from 1/4” mild steel. We settled on one Tin Man, which a range finder lased across his bass pond @ 190 yards. Based on my 5-shot offhand group @ 20 yards, which POI registered 8 o’clock about 2-inches to my POA, I loaded six rounds and took a Scientific Wild Ass Guess for a 1 o’clock hold on Tin Man @ 190 yards. Holding Isoceles offhand, the first shot returned a surprising and satisfying TIK. Six rounds produced 5x6 hits, spread around Tin Man’s torso. If my friend was stunned, I was elated. That was in Alabama. Soon after, in Vermont, I described the beautiful Peacemaker to a friend and occasional shooting/hunting buddy. An early Colt Model 1873 made to firm dimensions was not news to him. Which may or may not have bearing on chamber & groove dimensions of your Colt New Service. David Bradshaw Mr. Bradshaw, what is your opinion on the safe production dates for colts to use smokeless powder in? You stated using smokeless loads in an 1897 colt, and I have an 1896 colt that has been in my family since it was bought new in St. Louis. I have never shot it as I do not currently possess 44-40 dies nor black powder. What says you about loading light smokeless loads for this gun? |
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