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Thread: Another Air gun lab experiment.

  1. #1
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    Default Another Air gun lab experiment.

    Thought I'd do some impact / penetration tests with AA's and Accupells and coke tins...

    Kit:
    S400K @12ft/lbs
    Hawke Airmax 4-12x44AO

    Setup:
    Shot from benchrest.
    25m Distance to the first tin exactly.
    AA's = Diablo Fields 4.52 8.44gr.
    Accupells = Diablo 7.9gr.
    The tins were filled up to the brim with water.
    Tins and rifle were at same height.



    Really optimistic here, nine tins. In the end it only took 3 tins per test.

    ************************************************** **
    Air Arms Test 1


    Big split on the first tin!
    Went into, but did not exit the third tin.
    The third tin had a dent in the rear wall, but no piercing.

    The pellet recovered inside the third tin.


    Not too much deformation on the pellet. Pellet skirt has been pushed uniformly up into the head. Notice the rifling impressions on the rim of the head and on the tail of the skirt.

    ************************************************** **

    Accupell Test 1



    Notice the almost perfect enty into the first can.
    Pellet carried through identical to the AA's. Just a dent on the rear of the third can.

    Recovered pellet


    Pretty much the same as the AA's, perhaps slightly more compressed. Little more tail damage, but that could be down to slightly off centre impact?

    ************************************************** **
    Air Arms Test 1


    Wasn't sure if the split can on the AA's first test was perhaps due to the seam of the tin. So I turned the next three tins 90 degrees and repeated the test.



    Nope, still get a huge split on the entry of the first tin.

    Recovered pellet


    ************************************************** ***

    Conclusions:

    Coke tins are not an ideal method of impact test I think. The metal, water and metal probably causes mismatch, although the pellet path was dead centre - ie the pellet was not deflected from it's true flight direction, the final dent from both pellets was still on the center line.

    Interesting that the AA's caused a split. The first tin was thrown up into the air on impact, approximately a tins height and then somersaulted.
    The Accupells first tin jumped a little on impact, perhaps an inch or two at most.

    Anyways, more becaused I was bored yesterday morning at work than anything else. Not sure what to read into the different initial impacts. Still impressed with the power delivered from a 'legal' powered air rifle though.

    ...

  2. #2
    Sharp Shooter
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    Aviom what I hav seen on the net is that the guy filled a +/- 10 cm OD pipe with putty then shot into that . He then pushed the putty out and cut along the entry piont down to where the pellet stoped .Thus determined the penetration of the pellet . He also had the after pics of what the pellets looked like . Not many of the pellets looked good anymore all of themwere deformed.

  3. #3
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    Would really like to do some tests with ballistic's putty. Pretty expensive though.
    Might have a bash with some window putty as you mentioned - ta.

    ...

  4. #4
    Sharp Shooter
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    Avion .The guy that did it used window putty

  5. #5
    Sharp Shooter
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    OK Avion . Try these web
    pages found it in my favorites
    http://home.hiwaay.net/~ispellan/PelletTest02.html
    http://www.fen-net.de/norbert.arnoldi/army/wound.html
    Just checked them both out still running .
    The second one was interesting to me but not any usable info for us
    <span class='smallblacktext'>[ Edited Sat Jun 04 2005, 10:54AM ]</span>

  6. #6
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    ta Allan, very interesting reading.

    ...

  7. #7
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    i think use zinc pellet would land into the fourth can.

  8. #8
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    Bit of a read on over-penetration.

    http://www.airgun.co.uk/airgun_ballistics.htm

    ...

  9. #9
    Sharp Shooter
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    Avion . I know you dont like "Airgun World" but you would like the article on pg40 and 41 titled Penetrating observations . (April 2005) . A good comparison is made between .177 and .22 . They also show the new Air Arms S400 Custom.

  10. #10
    psychoSven's Avatar psychoSven
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    play doe i think works wonders for penetration as well. pretty similar to a live body.

  11. #11
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    Allan - I went to two big CNA's today. No luck on the magazine. :<

    Any chance you could bring it along to a shoot? - would like to see the article on the S400 Custom please.

    ...

  12. #12
    Sharp Shooter
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    OK

  13. #13
    Sharp Shooter

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    You can make your own "ballistic gel" with a few household products.
    [link=hyperlink url]http://www.logicsouth.com/~lcoble/dir5/gelprep.txt [/link]

  14. #14
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    Easy to make gel, cake flour mixed with water till correct consistancy like putty is obtained. Make enough to fill a cofee tin. Place at required distance and fire away. Use sticks or chicken bone to simulate skeletal damage or deflection patterns. I use black plastick or discarded pigskin gloves to simulate skin
    Enjoy

  15. #15
    Sharp Shooter
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    Stoffeltoo , you could go work with the guys from "Myth Busters"

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