Page 1 of 2 12 LastLast
Results 1 to 15 of 17

Thread: Pellet Reducer

  1. #1
    Sharp Shooter

    User Info Menu

    Default Pellet Reducer

    The guys looking for the heavy 5.0mm Eunjins got me thinking and it was a bit slow in the morning, so I got to play a bit in the workshop. I also cannot get those Eunjins to group at all.

    I made a "Pellet Reducer" to reduce 5.5mm pellet down to 5.1mm. More to proof a point than anything else. These are very basic and not intended for producing lots of pellets. For that one should consider a more efficient design.

    See Album. https://www.airrifle.co.za/album.php?albumid=738

    Below is an explanation of what is going on there.

    Firstly, this is the tapered reamer I bought for reaming the barrel ports. I used this to ream the Pellet Reducer hole so that the exit is exactly 5.1mm. Because it is tapered it also gradually reduce the pellet to the correct size.

    Reamer.


    Pellet Reducer


    I assembled the reducer and the holder on my woodwork bench. Placed some bubble wrap below for a soft landing for the pellets.



    By placing the pellet carefully in the reducer and then using the punch and hammer slowly tap the pellet through. When they come out the other side they look like this. The pellet sides (head and skirt) gets flattened a little to the correct size of 5.1mm.



    Left to right

    Standard 5.0mm, 13.7gr
    Reduced 5.5mm, 16gr (before & After)
    Reduced 5.5mm, 18gr (before & After)

    For testing I did not change anything on the rifle or scope, only the pellets. The aiming point was always the center.

    Then it was play time......

    A.
    I shot a 10 shot string at 30m over the chrony with the Standard JSB Diabolo Exact, 5mm, 13.7gr.

    See the excel file below and the target photo in the album, top left. Not bad and there was a bit of wind gusting around also.

    B.
    Then I took the "reduced" 5.5mm AA Diabolo Field, 16gr's and shot them. I did not weigh them again. Shot 10 shots over the chrony.

    See the excel file below and the target photo in the album, top second from left.

    C.
    Then I took the "reduced" 5.5mm AA Diabolo Field, 18gr's and shot them. I did not weigh them again. Shot 10 shots over the chrony.

    See the excel file below and the target photo in the album, top second from right.

    I think the one pellet that went low was me.

    D.
    Lastly I again shot a string with the Standard 5.0mm JSB's, top right.



    All groupings are ten shots. I think the photo's and chrony string speak for themselves. If you want heavy 5mm pellets, lots of time etc then give it a go.


    Finaly I also tried to reduce some JSB Exact Monsters. They did not work because the skirt became to long and thin. When you try to chamber them they get distorted.

    Last edited by Wannebe; 05-08-12 at 20:31.
    Sign Up To Air Rifle SA Forums

  2. #2
    Rest in Peace Mike 05/12/2014

    User Info Menu

    Default

    Well described, even an ignoramus like me understands .....because it was not written in kitchen English!
    Sign Up To Air Rifle SA Forums

  3. #3
    Sharp Shooter

    User Info Menu

    Default

    Quote Originally Posted by MMP View Post
    Well described, even an ignoramus like me understands .....because it was not written in kitchen English!


    Huh ..... now I must be stupid.
    Sign Up To Air Rifle SA Forums

  4. #4
    Sharp Shooter
    ARF Member Of The Year 2011

    User Info Menu

    Default

    Toemaar Wannabee, jy was konsrtuktief besig in jou werkswinkel terwyl daar iewers op die forum ge-wharra was oor taalgebruik
    Stunning plan and excellent results! Boer maak 'n plan
    Sign Up To Air Rifle SA Forums

  5. #5
    Sharp Shooter

    User Info Menu

    Default

    Quote Originally Posted by DvdM View Post
    Toemaar Wannabee, jy was konsrtuktief besig in jou werkswinkel terwyl daar iewers op die forum ge-wharra was oor taalgebruik
    Stunning plan and excellent results! Boer maak 'n plan

    Thanks. Was not really trying to make a plan of sorts. I was just out to prove whether it could or could not be done.

    Seems to work.
    Sign Up To Air Rifle SA Forums

  6. #6
    Sharp Shooter
    ARF Member Of The Year 2011

    User Info Menu

    Default

    Wannabe, check this out:
    http://www.photosbykev.com/wordpress...pellet-sizing

    He only shows part of his die though.
    Sign Up To Air Rifle SA Forums

  7. #7
    Sharp Shooter

    User Info Menu

    Default

    Thanks DvdM, very interesting. Maybe those 5.5 / 5.0 shot well because they were all the same size ??

    If I have to say so myself, but my pellets came out with less marks on them.

    I used a reamer (the same one as for reaming the ports in the barrel) to ream the hole to size after I've drilled it. This also create a nice taper for the pellet to be resized gratualy.

    The only "trick" is that when one "load" the pellet for sizing one must ensure that the pellet does not sit scew to start of with. If it does then the pellet get sized "scew" (difficult to explain but I'm sure you get it )
    Last edited by Wannebe; 19-09-10 at 14:30.
    Sign Up To Air Rifle SA Forums

  8. #8
    Sharp Shooter

    User Info Menu

    Default

    ..... forgot to mention ......

    I also reamed the hole from both sides. More from the back. That way it created I definate ridge in the hole that maybe also help with the pellets coming out nice and clean.

    (The Smallest diameter "sits" inside the hole, it is not the exit edge)
    Sign Up To Air Rifle SA Forums

  9. #9
    Sharp Shooter

    User Info Menu

    Default

    .... should also add. I did the reaming in the lathe so it came out nice and center from both sides.

    Also would not want to make more than one. This is a once off handmade custom job that I will not be able to reproduce to the tolereances required. I reamed, "resized apellet", test for loading in the barrel (repeat a couple of times) untill it was just perfect.
    Sign Up To Air Rifle SA Forums

  10. #10
    Sharp Shooter

    User Info Menu

    Default

    Updated the album & the write-up a bit.
    Sign Up To Air Rifle SA Forums

  11. #11
    Inactive Member

    User Info Menu

    Default

    I missed this interesting thread completely.
    Very well explained swaging of pellets.
    I am interested in swaging bullets, but have done nothing about it yet (270 to 260).
    Sign Up To Air Rifle SA Forums

  12. #12
    Inactive Member

    User Info Menu

    Default

    JSB kan maar gerus vir ons mense wat van .20 cal hou jsb monsters uit bring hoop dit gebeur darm eendag voor ek my kop neerle.
    Sign Up To Air Rifle SA Forums

  13. #13
    Inactive Member

    User Info Menu

    Default

    بيليه المخفض:
    هل هذه المجموعة للبيع إذا كان حجم 5.5 ملم

    Pellet Reducer:
    Is this set for sale if the size is 5.5 mm

    Sign Up To Air Rifle SA Forums

  14. #14
    Sharp Shooter

    User Info Menu

    Default

    No
    Sign Up To Air Rifle SA Forums

  15. #15
    REP: WS Airguns

    User Info Menu

    Default

    Wannebe inspired me to make myself such a reducer.....



    Reduced JSB 18.13gr 5.52mm to 5.1mm



    And JSB 25.39gr 5.52 to 5.1mm



    Accuracy tests on the 18.13gr will soon commence.
    Last edited by wimpie swart; 22-06-18 at 12:01.
    Sign Up To Air Rifle SA Forums


Similar Threads

  1. Wannabe Pellet reducer album!
    By Sniperdad in forum Airgun Discussions
    Replies: 1
    Last Post: 21-11-10, 11:10
  2. Pellet Reducer
    By Colonel in forum Airgun Discussions
    Replies: 4
    Last Post: 12-11-10, 05:14
  3. What pellet?
    By Mr H in forum Airgun Discussions
    Replies: 3
    Last Post: 30-05-10, 23:33
  4. 300 bar flow reducer
    By JTK in forum Airgun Discussions
    Replies: 31
    Last Post: 05-08-09, 12:53
  5. pellet to pellet weight variation........
    By urabus in forum Airgun Discussions
    Replies: 5
    Last Post: 07-09-05, 23:55

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Friends of Air Rifle SA