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Thread: Percussion revolver cylinder chamber measuring?

  1. #1
    Boolit Master Kev18's Avatar
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    Percussion revolver cylinder chamber measuring?

    How could I measure my chambers in my repro 1858 cylinder? They look small? Should I smash a lead ball in there and beat it out or is there an easier way to do it thats going over my head?
    How tight are the balls supposed to be in the cylinder? The repro cylinder is alot tighter then my original. Im guessing like all holes, one that has been used for quite some time is alot looser then a fresh new one.

  2. #2
    Boolit Master

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    Pin gages. you probably don't have a set. Not really cheap but very useful.
    https://www.amazon.com/HFS-0-251-0-5...3-ea3956ea4ac0
    To lazy to chase arrows.
    Clodhopper

  3. #3
    Boolit Master Kev18's Avatar
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    Quote Originally Posted by clodhopper View Post
    Pin gages. you probably don't have a set. Not really cheap but very useful.
    https://www.amazon.com/HFS-0-251-0-5...3-ea3956ea4ac0
    Didnt even know these existed.

  4. #4
    Boolit Master
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    Quote Originally Posted by Kev18 View Post
    Didnt even know these existed.
    cheap digital caliper will get you close enough if you careful how you use it

  5. #5
    Boolit Master
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    Keep in mind that the chamber mouths might have been chamfered (beveled). Do you have any .451 roundballs?

  6. #6
    Boolit Master
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    Repro revolver chambers are usually. 450. Originals were larger.
    QUIS CUSTODIET IPSOS CUSTODES?

  7. #7
    Boolit Grand Master

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    For what you need bullets of known diameter will get you close. A 451 452 and a 454 will tell you what size ball you need. You are just going to put in a ball that shaves a ring of lead if you want more accurate than that you wil probably want a better barrel matched to the cylinder. The standard barrels should put you in the 3 inch or so range at 25 yards. A custom barrel will cut one ragged hole.

  8. #8
    Boolit Master Kev18's Avatar
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    Well it's a navy model so it isn't .45. But I guess il measure it with a ball. I use .375 ball diameter.

  9. #9
    Boolit Grand Master pietro's Avatar
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    Quote Originally Posted by Kev18 View Post

    How could I measure my chambers in my repro 1858 cylinder ?

    They look small ?

    The repro cylinder is alot tighter then my original.

    Could it be a .36cal instead of a .44cal ?

    If it is a .44cal, then I wouldn't fret about a tight fit, because it's best to shave a ring of lead off the ball during seating.

    Better accuracy & it seals the front of the chamber.





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  10. #10
    Boolit Master Kev18's Avatar
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    Turns out that they are just right. They are only tight at the mouth. I shave a small lead ring as they go in.

  11. #11
    Boolit Master
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    I keep thinking that your Remington is a .44. I have quite a few antiques but I don't have a .36 Remington (well, I do have a Remington Beals .36) and I can't remember seeing or handling one. FLAYDERMANS GUIDE TO ANTIQUE AMERICAN FIREARMS says that there were 122,000 New Model .44s made, but only 28,000 Navy .36. They're not rare, but not that common.

  12. #12
    Boolit Master Kev18's Avatar
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    Quote Originally Posted by Battis View Post
    I keep thinking that your Remington is a .44. I have quite a few antiques but I don't have a .36 Remington (well, I do have a Remington Beals .36) and I can't remember seeing or handling one. FLAYDERMANS GUIDE TO ANTIQUE AMERICAN FIREARMS says that there were 122,000 New Model .44s made, but only 28,000 Navy .36. They're not rare, but not that common.
    Mine isnt collector grade. The owner before the one I bought it from trimmed the original cylinder down for some reason... I just got some replacement parts. They are pietta so I had to do alot of trimming. I have a new hammer and hand. Cylinder rotates perfectly and action works great. Except now I have my original broken bolt/cylidner stop in the gun since I broke the new one trimming it. It was massive and had an odd shape. I will order an original replica. But it works flawlessly now. Im sad that my bolt is broken:/ I welded it but I want a fresh one.

  13. #13
    Boolit Master
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    Very few of mine are near collector's grade, but they're still cool to have. One is what I'd call a relic - missing most of its parts.

  14. #14
    Boolit Master
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    I vote for using a pin gage set as the easiest method to determine chamber diameter. Some minor variation in chamber diameter is not uncommon. It's particularly noticeable when ball diameter is not particularly oversize for the larger chamber. The difference in effort for the smaller chamber will be noticeable.

    My navy caliber Pietta 1858 has .367 chambers. Seems a lot to expect that a ball would obturate to .375, which is groove depth. That's .008 expansion. The most accurate projectile I've found is a 158gr Lee RNFP which casts .358 out of soft lead. With the heel band sized .356 and paper patched to .370 on the forward bands, the PP'd heel band slips into the chambers easily and they press fit firmly without tearing the paper. I did polish the corner on the chamber mouths with fine emery cloth to put a tiny radius on each, just so it isn't sharp and likely to cut the paper patch. RB's and heeled boolits cut a little less of a lead ring and swage in just a bit tighter that way.

  15. #15
    Boolit Master Kev18's Avatar
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    The gun seems to work fine, except now I need to figure alittle problem out. The original cylinder rod thing... the rod that the cylinder spins on. Is a little small in diameter. So the cylinder sags aLittle forward. I would need figure something out to take out the loose.

  16. #16
    Boolit Master
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    What about aluminum foil tape? I use it for different projects.

  17. #17
    Boolit Master Kev18's Avatar
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    Quote Originally Posted by Battis View Post
    What about aluminum foil tape? I use it for different projects.
    Il try it! Good idea. I have some I think.

  18. #18
    Boolit Master
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    Here is the perfect range wear for test firing that rascal.
    Click image for larger version. 

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  19. #19
    Boolit Buddy blackbahart's Avatar
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    more correct way to resolve the issue is to bore the existing pin hole and make a bushing to fit the old pin as taping up the pin it will probably not go back into the hole in the frame .

    running a tap into the hole to push up some metal to bush the hole will be a more reasonable measure to insure the chamber stays aligned than tape ...Seen a few of these antiques sold up here with no disclosure of the things done to them

  20. #20
    Boolit Master
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    Quote Originally Posted by blackbahart View Post
    more correct way to resolve the issue is to bore the existing pin hole and make a bushing to fit the old pin as taping up the pin it will probably not go back into the hole in the frame .

    running a tap into the hole to push up some metal to bush the hole will be a more reasonable measure to insure the chamber stays aligned than tape ...Seen a few of these antiques sold up here with no disclosure of the things done to them
    Very good advice, tape ( not real sure how you would put it on and get the pin through the frame) is not a good idea even if you could.
    Have you checked to see if the chambers are spaced so they line up with the bore ?

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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
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LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check