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Question springer power setting

Discussion in 'Anything Airgun Related' started by render87, May 17, 2014.

  1. render87

    render87 Busy Member

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    just a quick one guys if i set my tx up about 11.5 with hobbys should everything else be legal or is it not that simple?
     
  2. couzensmark

    couzensmark Busy Member

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    If it helps mate my hw97 is most powerful with aa field pellets
     
  3. Pidlar

    Pidlar Big Poster

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    As every rifle and pellet combination is different, it's not quite that simple. I'd aim around 11.2 with a mid range pellet, but only after testing with heavier and lighter options first.
    From experience I've had a mk3 creep up from 11.4 to 12.2 after around 2000 pellets.
    Just my 2 penneth.
    Regards Stu.
     
  4. keithy

    keithy Keyboard Hero

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    Once your springer is fully bedded in it shouldn't go over with heavier pellets, i have tried 19 grain against the usual 16 grain and the power dropped i have also tried 13.4 grain as well and it was similar to the 16 grain power levels. the heavier pellets did increase power in my pcps though. I would just keep checking occasionaly to see if your power is still increasing if you think the gun still has not bedded in.:cool:
     
  5. dave goodall

    dave goodall Donator

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    A springer will go over more with lighter pellets to heavy pellets its pcp what go higher with heavy pellets always chrono a springer with lighter pellets to check legallity and heavys to be sure
     
  6. render87

    render87 Busy Member

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    ill try and put as many different weights over a chrono when i get it
     
  7. mattyts

    mattyts Donator

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    It's not that simple and the usual recommended rule of "heavier,lower and lighter,higher power" isn't always applicable pellet size and head is a factor too,best thing to do is to try them all :)
     
  8. Dag

    Dag Pro Poster

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    One would think it should be that simple. After all when you put a pellet of known weight down the barrel of a gun with a determined power output based on the spring inside it you would think the formula:
    Ftlbs = (muzzle velocity in fps x muzzle velocity in fps x pellet weight in grains) / 450240
    would just have to be juggled round to give you a different velocity for each pellet you try out and that the power would remain a constant. After all the spring doesn't change, and you know the weight of the pellet, so what alters?
    As Matty says it isn't that simple, and if I understand them correctly most of the answers given to your question so far would each appear to have a different understanding and in some cases answer to the problem.
    So if the power of the spring is constant, and if the weight of the pellet is known, what changes the speed to give changing power levels and does it change, as one answer actually says it does not change on a springer.
    Perhaps it is the pellet shape rather than the weight, eg the OP is using Hobbys which are a wadcutter, and a change to Diablo must have some effect on muzzle velocity.
    The only thing that seems certain in all of this is that one not only has to test each pellet you are going to use with a chrono, as the law will not be sympathetic to a plea of ignorance if you creep above 12ftlbs, but also keep checking your guns constantly and especially if new or recently modified.
    Dag
     
    Last edited: May 17, 2014

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