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Thread: Sheridan Silver Streak CBW

  1. #1
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    Sheridan Silver Streak CBW

    Got a nice minter nickel Silver Streak with Williams peep sight come in for spit and polish before going to market. Thought I would chrono the different fps readings according to number of pumps. Was not too impressed with results.
    11.42 grn .20 pellet
    1 pump 0 fps
    2 275
    3 375
    4 427
    5 470
    6 506
    7 521
    8 549

    There is a big increase in fps on the first few pumps but the increase tails off the more you do. I used to do body building when I was young but now 70 and thought 8 pumps is enough especially after I squashed my little finger under the lever.

    Baz
    BE AN INDEPENDENT THINKER, DON'T FOLLOW THE CROWD

  2. #2
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    Maybe the pumphead seal needs replacing?

    I have a Silver Streak and a Blue Streak, No idea of the muzzle energies as I shot my Chrony dead and the Combro doesn't really fit to the Streaks very well

    EDIT- Due to speed reading I completely missed the last bit- If it's hard to pump then the pump seal is doing it's job as there would be little resistence when pumping



    John
    for my gunz guitarz and bonzai, see here
    www.flickr.com/photos/8163995@N07/

  3. #3
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    That's the second time in a week you have hurt your hand with a pump up gun Baz.
    I think the message is clear.

  4. #4
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    Sheridan rocker data

    I used to make an exhaust valve for these with only one exit hole, ( It had to be aligned with a supplied tool )
    & Also a threaded pump rod, These lifted the output substantially !
    The idea being to use less pumps per 12 Fpe, This was regulated by the hammer spring,
    & Also a Silencer adapter,

    I still have a number of spares & 2 Incomplete actions, Some Pre-charged Sheridan Pics, Etc

    Sheridan output data ( I cannot find my uprated numbers ) Around 25%



    Silencer adapters , ( Most went to the states ) I kept one
    Last edited by gedfinn 2; 17-06-2016 at 06:03 PM.

  5. #5
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    Quote Originally Posted by johnbaz View Post
    Maybe the pumphead seal needs replacing?

    I have a Silver Streak and a Blue Streak, No idea of the muzzle energies as I shot my Chrony dead and the Combro doesn't really fit to the Streaks very well

    EDIT- Due to speed reading I completely missed the last bit- If it's hard to pump then the pump seal is doing it's job as there would be little resistence when pumping



    John
    John, I see you are a fellow chrony hunter like me. Shot mine about 5 times but it wouldn't die so I now made it pellet proof with steel plates.

    Baz
    BE AN INDEPENDENT THINKER, DON'T FOLLOW THE CROWD

  6. #6
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    Quote Originally Posted by gedfinn 2 View Post
    I used to make an exhaust valve for these with only one exit hole, ( It had to be aligned with a supplied tool )
    & Also a threaded pump rod, These lifted the output substantially !
    The idea being to use less pumps per 12 Fpe, This was regulated by the hammer spring,
    & Also a Silencer adapter,

    I still have a number of spares & 2 Incomplete actions, Some Pre-charged Sheridan Pics, Etc

    Sheridan output data ( I cannot find my uprated numbers ) Around 25%

    http://i101.photobucket.com/albums/m...&1466074904499

    Silencer adapters , ( Most went to the states ) I kept one

    http://i101.photobucket.com/albums/m...&1466075599613

    http://i101.photobucket.com/albums/m...&1466074904501

    http://i101.photobucket.com/albums/m...&1466074904500

    http://i101.photobucket.com/albums/m...&1466074904489

    http://i101.photobucket.com/albums/m...&1466074904489

    Sheridan Precharged construction & Finished ( With a .22 Setra barrel )

    http://i101.photobucket.com/albums/m...&1466074904442

    http://i101.photobucket.com/albums/m...&1466074904441

    http://i101.photobucket.com/albums/m...&1466074904443

    http://i101.photobucket.com/albums/m...&1466074904444

    Sheridan Thumbhole stock & Pump arm

    http://i101.photobucket.com/albums/m...&1466074904501

    http://i101.photobucket.com/albums/m...&1466074904502
    Ged, looks like you really like these rifles. I do not own one, this belongs to an RFD but with me it is nostalgia, I remember seeing my first Sheridan .20 55 years ago and wished I could afford one. My mate who had it made a die to push .22 pellets through to size them down to .20.

    Baz
    BE AN INDEPENDENT THINKER, DON'T FOLLOW THE CROWD

  7. #7
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    Put a new hammer spring in mine shoots well on five pumps

  8. #8
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  9. #9
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    Quote Originally Posted by smallholder1 View Post
    Put a new hammer spring in mine shoots well on five pumps
    A lot of rifles seem to shoot "well" until you actually measure the fps. My friend who owns the rifle is quite happy with it, mainly as a collectable due to its lovely condition. I would have put a new hammer spring in but it was expelling all the air from the pressure chamber on firing and there was no air left in for a second shot, which would be a sign that the spring is too weak.

    Baz
    BE AN INDEPENDENT THINKER, DON'T FOLLOW THE CROWD

  10. #10
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    Thumbs up

    Quote Originally Posted by Benelli B76 View Post
    John, I see you are a fellow chrony hunter like me. Shot mine about 5 times but it wouldn't die so I now made it pellet proof with steel plates.

    Baz
    Ha ha ha!! Yep, 'Fraid so!

    I bought two new displays for my Chrony F1 (Which I killed within 24 hours of buying it new!), By the time i'd found out where to buy the displays and ordered them, I'd go no idea where i'd put the F1, Eventually it turned up but then I couldn't find the displays

    Luckily a few months later they turned up!!, Now i've no idea where i've put my soldering tackle

    The Combro flew well, I used my cleaning rod to find centre with the Combro, I used it with a mk2 Airsporter, Found centre but forgot to tighten the clamp, It went down the garden at great speed, After this I earned my monika 'Chrono Slayer'



    John
    for my gunz guitarz and bonzai, see here
    www.flickr.com/photos/8163995@N07/

  11. #11
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    Thumbs up

    Quote Originally Posted by smallholder1 View Post
    Ooooh!!

    That looks really clean!

    These are mine..



    John
    for my gunz guitarz and bonzai, see here
    www.flickr.com/photos/8163995@N07/

  12. #12
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    Quote Originally Posted by Benelli B76 View Post
    Got a nice minter nickel Silver Streak with Williams peep sight come in for spit and polish before going to market. Thought I would chrono the different fps readings according to number of pumps. Was not too impressed with results.
    11.42 grn .20 pellet
    1 pump 0 fps
    2 275
    3 375
    4 427
    5 470
    6 506
    7 521
    8 549

    There is a big increase in fps on the first few pumps but the increase tails off the more you do. I used to do body building when I was young but now 70 and thought 8 pumps is enough especially after I squashed my little finger under the lever.

    Baz
    You can test for a leaking air chamber by using the max 8 pumps and then letting the gun sit for a period of time. If the velocity goes down substantially then there is air leaking out of the air chamber.

    First step with these guns, if you don't want to do a full maintenance, is to use some pneumatic oil: I always have recommended Crosman oil but any good oil intended to work with pneumatic air guns should be okay. You want to work some into the pump area to lube the pump-head and to work it towards the exhaust valve. Oil worked over the surface of the valve seat can clean the surface and stop any leakage.

    MAC-1 in Los Angeles has an array of Sheridan upgrade parts that are all highly recommended. http://www.mac1airgunshop.com/steroid-parts-s/1838.htm

  13. #13
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    Quote Originally Posted by DT Fletcher View Post
    You can test for a leaking air chamber by using the max 8 pumps and then letting the gun sit for a period of time. If the velocity goes down substantially then there is air leaking out of the air chamber.

    First step with these guns, if you don't want to do a full maintenance, is to use some pneumatic oil: I always have recommended Crosman oil but any good oil intended to work with pneumatic air guns should be okay. You want to work some into the pump area to lube the pump-head and to work it towards the exhaust valve. Oil worked over the surface of the valve seat can clean the surface and stop any leakage.

    MAC-1 in Los Angeles has an array of Sheridan upgrade parts that are all highly recommended. http://www.mac1airgunshop.com/steroid-parts-s/1838.htm
    Thanks Dean, will try some PellGun oil and work it through. Will have to get rifle back from the owner, he has it up for sale.

    Baz
    BE AN INDEPENDENT THINKER, DON'T FOLLOW THE CROWD

  14. #14
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    Quote Originally Posted by Benelli B76 View Post
    A lot of rifles seem to shoot "well" until you actually measure the fps. My friend who owns the rifle is quite happy with it, mainly as a collectable due to its lovely condition. I would have put a new hammer spring in but it was expelling all the air from the pressure chamber on firing and there was no air left in for a second shot, which would be a sign that the spring is too weak.

    Baz
    If the hammer spring good should dump all the air and leave non for second shot, I was getting up to four shots from a cut down spring

  15. #15
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    Quote Originally Posted by smallholder1 View Post
    If the hammer spring good should dump all the air and leave non for second shot, I was getting up to four shots from a cut down spring
    Four shots at what energy ft.lb.? Thats what we are getting at, as my one was only 7.64 ft lb for 8 pumps. My HW 95 .20 puts out 670 fps with one cocking action to give 11.38 ft.lb.

    Baz
    Last edited by Benelli B76; 18-06-2016 at 07:12 PM.
    BE AN INDEPENDENT THINKER, DON'T FOLLOW THE CROWD

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