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different pellets/different fireing cycle noise

Discussion in 'Anything Airgun Related' started by martin22, Aug 20, 2014.

  1. martin22

    martin22 Donator

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    over the years ive come to appreciate how important it is to do you homework on choosing the right pellet for your rifle considering accuracy and that can only be achieved by testing as many different brands and grains as possible untill you find one that suits your barrell
    one thing i have noticed though (were talking springers here) is that between brands there can be a considerable difference in fireing cycle noise,ive allways put this down to different grains but recently i tested 2 brands that were practically the same grain but there was a considerable difference in cycle noise
    now all the springers ive owned have been tuned in some way or another so not sure if this is similar with standard springers?
    all the pellets i use are domehead (occasionally use flat head in close quarters like barns) but anybody else notice this?
    anybody notice this with pcp?
    whats peoples opinions or "scientific" :rolleyes: analysis on this?
     
    Last edited: Aug 20, 2014
  2. Akita177

    Akita177 The Absolute State of Britian podcast

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    Softness of the lead and how the skirts puff up with the blast of air are probly the reason.
     
  3. martin22

    martin22 Donator

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    good point,taking that into consideration ive just looked at 2 pellets that there was a considerable difference with
    jsb jumbo express 14.35gn,quite a soft pellet,quite loud fireing cycle
    h&n ftt 14.66gn,quite a hard pellet, a lot quiter fireing cycle
    not best picture but on the left is the h&n ftt and on the right jsb jumbo express
    View attachment 102038

    both pellets are very accurate in my rifle,the skirt on the h&n is a bit shorter and a lot harder than the jsb but overall the pellets are roughly the same length,and as said above there roughly the same grain,i know its nothing scientific but just from what im seeing here its looking like a shorter/harder skirt seems to dull the cycle noise better,its something im going to look at a bit closer and test a few more though :up:
     
  4. martin22

    martin22 Donator

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    another thing ive just noticed (again h&n left,jsb right) the skirt is thicker on the h&n and its recessed all the way into the head,sort of goes into a point,the jsb is only recessed to the shoulders of the skirt and is flat,wonder if this has anything to do with it?
    View attachment 102041 View attachment 102042 View attachment 102044
     
    Last edited: Aug 20, 2014
  5. martin22

    martin22 Donator

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    Any one else any thoughts/theories on this?
     
  6. jw74

    jw74 Posting Addict

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    No theories on why,but I've noticed the difference in pellet types sounding a lot different. Some smoother and quieter.
     
  7. timmytree

    timmytree Top Poster

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    lots of reasons why, weight is one thing, pellet fit another and also the hardness(or softness ) of the lead alloy compound.
    A very light or loose pellet will take off down the barrel early in the cycle allowing the piston to slam against the end of the comp tube, very harsh. A tight or heavy pellet will be late moving causing the piston to bounce on a cushion of air, horrible recoil!
    It is possible to fine tune a springer to suit the pellet you use by balancing preload, piston weight and transfer port dimensions.
     
  8. Meteor62

    Meteor62 Major Poster

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    I found when shooting a spring gun some pellets give a nicer firing cycle with less recoil but when I mentioned it on here a year ago I was heckled as a buffoon so shut up on the matter, glad to see someone else backing up my findings
     
  9. RichieRich

    RichieRich Ping!

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    When i had my TX200, I found that the lighter Falcon Acc+ produced less recoil, but a little more noise from the action. Whereas, a 16 grain AA Flield would produce more recoil, and a slightly quieter thud from the action.

    There is some science to it, you're not alone :)
     
  10. martin22

    martin22 Donator

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    cheers for the replys fella's, there is definatly a difference between pellets and the ones ive mentioned above the difference is quite astonishing in mine,
    its got me thinking as just lately tuning is something ive been doing a lot of reading up on and talking to people about,my eyes have been opened up a lot as to whats involved in tuning a spring rifle,simply "dropping a kit in" is far from a tuned rifle,something that doesnt ever seem to get mentioned though is pellet choice and in reality it seems it can play a big part in achieving a super smooth fireing cycle and make or break a tuned rifle,
    just out of curiosity anybody noticed a difference with pcp's?
     

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