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Thread: What speed can I expect

  1. #1
    Sharp Shooter

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    Default What speed can I expect

    I've shot my chrony to pieces. Very stupid of me I know, and now to teach myself a lesson I will not buy a replacement for it till I really need one again.

    What I just want to know is the following: If my .20 Anxor spits out .20 JSB's at 850 fps, how fast will it spit out .20 H&N FTT's which weigh a whole 2 grains less? I want to work out the trajectories with chairgun for this pellet. I just want to finish this tin of FTT's then I'll swap back to the JSB's. Their accuracy is also very good in my Anxor.
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  2. #2
    Marksman
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    probably around 900fps
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  3. #3
    Inactive Member

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    You can THEORETICALLY calculate a guestimate max velocity. A 13.7grn JSB @ 850 fps is 21.98fpe, so theorically the max guesstimate vel. a 11.42grn@21.98 fpe is 930.90fps. I say guestimate, coz when you use lighter there is some energy loss so the heavier ammo's fpe is used as a estimate "maximum" threshold. So guido's "around 900" is pretty much on par as lower fpe (from lighter weight) will result in lower fps.
    Last edited by blankster; 19-11-08 at 10:22.
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  4. #4
    Sharp Shooter

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    Thanks guys. Only 50 fps more? I hoped for more...
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