What would FX guns be without JSB pellets ?

Forums PCP Airguns What would FX guns be without JSB pellets ?

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    bzizzi373
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    Everyone that owns a FX smooth twist barrel rifle knows how well these guns shoot JSB Exacts. I know my Crown .25 likes them, what would FX guns be like without JSB pellets ? I have PCP's with LW barrels and am able to accurately shoot JSB and other brands of pellets accurately.  Just something to think about.

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    BigTinBoat
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    My WC shooting CPUM's (10.5) almost as good as the JSB 10.34

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    MP44
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    How are AirArms pellets ( made by JSB but different dies than JSB labeled pellets ) in smooth twist x barrels compared to JSB labeled pellets? 

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    FunGun
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    MP44- I get pretty good results with washed and weighed AA pellets.  Probably as good if not better, than JSB.?  Keeping the ST barrels clean seems to be a big issue in accuracy.  Talked with Ernest (of FX USA) the other day and he says the ST barrel should be cleaned every 350 rounds.  Something to think about.

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    hawkeye69
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    FunGun

      Talked with Ernest (of FX USA) the other day and he says the ST barrel should be cleaned every 350 rounds.  Something to think about.

    Interesting. I've never cleaned the barrel on my Wildcat and it's always crazy accurate.

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    Glem.Chally
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    I get great results from the AA branded kings as well.  

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    AnimalHitman
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    I,too, find the JSBs the most accurate in my FX Wildcat ("WC") .25 MK1 with SmoothTwist. But, for hunting, the H&N Sport Baracuda Hunter Extremes perform much better. They dump virtually all of their energy into the animal, whereas domed pellets tend to simply pass through, dumping the bulk of their energy into the backdrop. Interestingly enough, the ballistic coefficient ("BC") of Hunter Extreme .25s @ 878 fps (the avg muzzle velocity of my WC) is virtually the same (0.0350) as the listed BC of JSBs (0.0360). It is important to note that BC changes as a function of velocity. (BC is actually inversely related to velocity. In other words, ceteris paribus, as projectile velocity decreases, BC increases!) Without the corresponding test conditions (BC can be measured only practically); such as velocity, windage, altitude, temp, humidity, barometric pressure, etc.; a BC number, in and of itself, is meaningless.

    http://riflebarrels.com/measuring-ballistic-coefficients-of-benchrest-bullets/

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    mr.grimm
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    My .22 cal Gladiator with Smooth Twist barrel shoots Air Arms 16gn and 18gn great. It also shoots H&N Sniper magnums 18gn great. H&N Barracuda Match in 21gn in 5.53 head diameter very good. Crosman premier hollow points shoot decent also, great for casual plinking. I think I have atleast 3000 rounds thru my smooth twist since I last ran some dry patches thru it and accuracy is still great . And yes it shoots the 16gn & 18gn JSB's great also. Also shoots the redesigned JSB monsters great also. So far the H&N Sniper magnums have been my go to longer range pellet. A lot of LW barrels seem to like JSB's the best also.

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    Revoman
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    I have excellent results with the AA 25.40 domed pellets, very accurate and consistent head sizes, normally only one thousandth off.  6.37-6.38 for the entire tin of 350.

    The H&N Barracuda works very well too though and the 27.47 gr H&N hollow points are the poops.  I really like shooting those guys.

    MK I WC in 25.

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    AirSupply
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    Jsb are hard to beat. In .22 out of my Crown I was impressed with the Sniper Magnums. 6 shots at 100y  

    Haven’t had enough good weather to do a back to back comparison with the Jsb’s yet

     

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    BigTinBoat
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    AnimalHitman

    . It is important to note that BC changes as a function of velocity. (BC is actually inversely related to velocity. In other words, ceteris paribus, as projectile velocity decreases, BC increases!)

    Pretty sure this is NOT true with pellets and the velocities they leave air rifle barrels.

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    Rodeo
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    I looked at the OP's question a little differently.  "What would FX rifles be like without JSB pellets?"   FX designed their rifles for JSB pellets.  If we did not have JSB brand pellets, then FX would have designed for ____ pellets (fill in the blank).  

    Same results??

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    Eaglebeak
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    In my experience, LW. and BSA barrels prefer them also. If JSB did not make pellets there would be no Air Arms, Cometa, Daystate, FX and at least another half dozen companies that relabel them. If Fx designed their barrels to suit something else, they would never be as accurate or consistent as with the superior JSB product.

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    AnimalHitman
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    BigTinBoat

    AnimalHitman

    . It is important to note that BC changes as a function of velocity. (BC is actually inversely related to velocity. In other words, ceteris paribus, as projectile velocity decreases, BC increases!)

    Pretty sure this is NOT true with pellets and the velocities they leave air rifle barrels.

    http://www.exteriorballistics.com/ebexplained/5th/24.cfm

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    spysir
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    That was a concern when FX first announced their special barrel some years ago. JSB/AA/other will be around as long as they can which is darn good as the U.S. no longer had lead mining.

     Now back OT   to that BC thing.

    Harry explains it nicely I think:

    https://www.airgunnation.com/topic/ballistic-coefficient-change-with-range-velocity-the-original-study-feb-2010/

    get you 12fpe rig out to 100+ and you'll see what's what.

     

    John

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    AnimalHitman
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    Thanks for that

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