Uberti Colt 1862 Police

Discussion in 'Blackpowder' started by rodwha, Jan 30, 2015.

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  1. rodwha

    rodwha Member

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    I'm looking for the dimensions of the chambers in relation to the land and groove diameters. Anybody know what these are?

    It seems as though Uberti percussion guns have more properly sized chambers.
     
  2. Old Fuff

    Old Fuff Member

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    According to their specifications:

    Groove Dia. .370"
    Groove Depth. .005"
    Twist: 32 x1

    Chamber Dia. .372"
    Ball Dia. .376
     
  3. mykeal

    mykeal Member

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    Hmm. My 1997 vintage Uberti 1862 Pocket Police is slightly different. The chamber size is the same (0.372") but the groove-to-groove dimension is tighter: 0.366".
     
    Last edited: Jan 31, 2015
  4. rodwha

    rodwha Member

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    I have read someone comparing .36 cal (Uberti/Pietta) that the .375" ball didn't fit tightly in an Uberti chamber, though I believe this was a larger navy model. But I'd think they'd use the same chamber reamer for their .36 cal cylinders.

    And then maybe they've changed them over the years. As I'd be buying a new one I'd also like to know the year model used for measurements.
     
  5. Crawdad1

    Crawdad1 Member

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    Not to mention properly sized frames. :)
    What length barrel are you going to get?
     
  6. rodwha

    rodwha Member

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    Before I had seen a 4.5" barreled version I figured the 5.5" was good, but the 3.5" barrel Taylor's sells as interesting. Now that there's a 4.5" barrel I'd likely just get that model and be done, though I still like the idea of swapping barrels.

    I also like the idea of a rounded grip, though I'm not sure I'd really want a full on birdshead grip, but maybe something more like what I've seen done on Remingtons where the rear portion is more rounded. But I do like the birdshead too.
     
  7. mec

    mec Member

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    We used .380 in an original colt as well as a uberti copy. The apparent loading pressure seemed the same and the 25-yard off-hand accuracy was identical. .3980 balls seem best with Uberti while 375s do not creep in pietta chambers. One problem with .375 hornady balls is that they are not completely round and not entirely .375 inch in all aspects. When the two characteristics line up, they tend to walk forward under recoil
    Pocket23yards.jpg
     
  8. dickydalton

    dickydalton Member

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    I cast .380 for my Uberti Pocket Police and my Colt Pocket Navy.
     

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  9. Old Fuff

    Old Fuff Member

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    You might think that Uberti's specifications for all .36 caliber revolvers would be the same, but they aren't.

    1851/1861 Navy and other similar revolvers .36 Specifications.

    Groove Dia. .380"
    Groove Depth. .010"
    Twist: 32 x1

    Chamber Dia. .372"
    Ball Dia. .376

    Notice that the barrel groove diameter is .008" larger then the chambers @ .372". This is not conductive to obtain the best possible accuracy. For decades many serious shooters have had the chambers reamed to .380" and used larger balls/bullets to match.

    It also suggests that buying a metallic cartridge cylinder to convert one of these revolvers to .38 Long Colt or .38 Special - using a .358" diameter bullet is not the best way to go unless you are hand loading using a heeled bullet.

    I have believed for a long time that the Italian makers consider that most buyers (meaning distributors) of their "regular line" of C&B revolvers will be more focused on cosmetics rather then chamber/bore dimensions. For the European market where match shooting is more popular they make more expensive target-grade versions, that unfortunately because of the cost are seldom imported and seen here.
     
  10. Panzerschwein

    Panzerschwein member

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    My Cimarron Uberti '51 Navy takes .380 balls.

    I tried .375 Hornady swags ones and they were loose.
     
  11. Old Fuff

    Old Fuff Member

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    No surprise. ;)

    As a chambering reamer is used it wears and over time it gets smaller in diameter. At some point it is retired and replaced. So some cylinders may have as much as (for example only) chambers that are as much as .378" where others are closer to .372".

    Back when.... At the Colt factory chambers were measured, after which a "correct size for it" bullet mold was included with the revolver.
     
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