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Thread: front sight on a BP 1851 navy colt

  1. #1
    Boolit Buddy
    Join Date
    Feb 2008
    Location
    texas city tx.
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    228

    front sight on a BP 1851 navy colt

    front sight on a BP 1851 navy colt

    my 1851 navy colt(its a rept.) (uberti) and it shoots about 9 inches high at 10 yards. I also have a spiller and burr(like a 1858 Remeton> that shoots about a foot high at 10 yards. I need to raise the front sights enough to bring these guns where I can shoot them "dead" on.
    Actually I have an 1860 in .44 and a 1861 in .36 that do shoot to point of aim at the same 10 yards. a local gun smith doesn't seem to be able to get the orginal sight out of the barrel, any one got any hints? Help".
    Pat

  2. #2
    Boolit Grand Master Outpost75's Avatar
    Join Date
    May 2013
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    over the hill, out in the woods and far away
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    10,158
    Use the original front sight as a base to attach and pin a higher blade which you can file to zero.

    To determine how much higher the sight needs to be use the expression

    X= RE/D where

    X is the amount of sight correction needed.

    R is the sight radius

    E is the error between the point of impact and point of aim and

    D is the target distance.

    ALL DIMENSIONS ARE IN INCHES.

    If only a small correction is needed, you could cut off the original front sight, file it flush to the barrel, then drill and tap the old sight base to thread in a raised "Bradley" pedestal type shotgun bead of the correct height.
    The ENEMY is listening.
    HE wants to know what YOU know.
    Keep it to yourself.

  3. #3
    Boolit Buddy
    Join Date
    Feb 2008
    Location
    texas city tx.
    Posts
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    thank you outpost 75! I was guessing about that but your math makes me feel good about my guessing. I was trying to get a gun smith to do the work, but I looks like I'll have to get my guns back and do it myself!

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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
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check