Rear Sight on Lyman GPR is loose

Discussion in 'Percussion Rifles' started by joliver, Dec 8, 2019.

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  1. Dec 8, 2019 #1

    joliver

    joliver

    joliver

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    I just took my Lyman GPR out of storage after many years and found that the rear sight is so loose in the dovetail that I can easily slid it back and forth with my fingers. I haven't sighted it in yet, so I don't want to use any LocTite on it.

    Recommendations?

    Thanks for any suggestions,

    joliver
     
  2. Dec 8, 2019 #2

    bubba.50

    bubba.50

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    Take the sight off, lay about a 9/16ths socket across the doveetail and give it a couple light taps with a small hammer. Try and repeat until ya get a nice tight fit.
     
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  3. Dec 8, 2019 #3

    Eddie Southgate

    Eddie Southgate

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    Bubba 50 said it right . I keep several sizes of brass rod up to 1 1/2" on my bench for just such uses . Mine are 6" long and I use them for everything I don't want scarred .
     
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  4. Dec 8, 2019 #4

    Griz44Mag

    Griz44Mag

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    Did this with my Mowrey when I changed out the sights, Works like a charm.
    AND - Thanks to the advice on this forum.
     
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  5. Dec 9, 2019 #5

    joliver

    joliver

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    bubba.50.

    Thanks. I'll give that a try. Appreciate your help.

    joliver
     
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  6. Dec 9, 2019 #6

    Cowboy

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    I have tightened up the rear sight on a number of muzzleloader’s using this method. Works like a charm!

    Another method to consider would be to stretch out the base of the rear sight its self. That means turning the sight over and peening out the the bottom side of the base edges with a punch and small hammer. Can also peen out an indentation on each corner and one indentation in the center. Between peening out the under side of the sight base,coupled with the indentation’s, that too will create a tighter fit along with friction. Also without having to alter the dovetail on your barrel.

    Another wise member here told me that if you alter a part, always alter the least expensive part!

    Anyway, both techniques will achieve your desired effect.

    Respectfully, Cowboy
     
    Last edited: Dec 9, 2019
  7. Dec 10, 2019 #7

    joliver

    joliver

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    Cowboy,

    Definitely sounds better than altering the dovetail so that no other size sight would fit. I'll get on this tomorrow morning.

    Thanks a lot,

    joliver
     
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  8. Dec 10, 2019 #8

    bubba.50

    bubba.50

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    A couple light taps on a socket across the dovetail won’t hurt anything at all nor prevent the use of anyy other sight in the future. And is a lot less work.
     
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  9. Dec 10, 2019 #9

    Sinner

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    Another easy method of tightening a sight in a dovetail is to use a center-punch to create a crater in the center of the dovetail.
     
  10. Dec 10, 2019 #10

    dragnetbill

    dragnetbill

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    This is the method that I first learned many years ago from a prominent gunsmith's how to book. However, I must admit that the very last time that I tried it the center punch crater continued right down inside of the bore; that is a sick kind of feeling to have even if your only working on a cap and ball replica. (And, no I wasn't using a sledge hammer; I just tapped the punch with a light ball peen.)
    I'm in bubba.50's camp now, got extra sockets in every range box.
     
  11. Dec 10, 2019 #11

    dlidster

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  12. Dec 10, 2019 #12

    bubba.50

    bubba.50

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    To each their own but, again, there is no ‘damage’ unless you’re beatin’ on your barrel with a sledge hammer.
     
  13. Dec 10, 2019 #13

    Prairieofthedog

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    Stupid question,but do you lay the socket sideways on the dovetail or stand it upright?
     
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  14. Dec 10, 2019 #14

    Sinner

    Sinner

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    That had to have been a VERY soft metal barrel!
     
  15. Dec 10, 2019 #15

    Eutycus

    Eutycus

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    Thank you I was wondering about that myself.
     
  16. Dec 10, 2019 #16

    Boomerang

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    Sideways.
     
  17. Dec 10, 2019 #17

    Boomerang

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    Like this:
     

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  18. Dec 11, 2019 #18

    fishmusic

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    I would crater the bottom of the sight. Safer than cratering the dove tail.
     

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