Over 180 FPE with a Talon .257: New TalonTunes Super High Output (SHO) Valve!

Forums Big Bore Airguns Over 180 FPE with a Talon .257: New TalonTunes Super High Output (SHO) Valve!

  • Views : 816
  • Link

    UpNorthAirGunner
    Participant
    Member

    The new TalonTunes Super High Output (SHO) valve is s BEAST! I installed it on my AirForce Airguns .257 Project Alamo rifle with a 34 inch barrel (same length as the Texan) and 6.25 inch DonnyFL Ronin Suppressor on the end. Watch here:

     

    The top rifle in the photo is the .257 and the bottom photo is my TalonP TAC-25 with 12 inch barrel and 7 inch DonnyFL KOI suppressor on the end for scale of barrel length difference.

    I am getting these kind of shot strings in feet per second (FPS) with an 85 grain cast spitzer slug at 3600 PSI: 999 > 991 > 982 > 970 > 960!

    That is over 180 foot pounds of energy from a rifle that in its original stock Talon SS form is one Airforce's lowest powered rifles! Two thumbs up for this MOD! Check it out: https://talontunes.com/shop/super-high-output-valve-sho/

    Link

    jwrabbit123
    Participant
    Member

    I have had an angled low profile valve from PCP tunes which gets 187FPE , with a 1.8 spring and a 112gram hammer spring

    Is this a mad dog stock like hunter supply sells ? I guess with this stock you do not need angled valve

     

    Link

    davidsng
    Participant
    Member

    Wow! That is some serious power!  Crazy.  I see that flat trajectory would make a killer coyote gun!

    Link

    steve123
    Participant
    Member

    What is the G1 BC at 990 fps for those 85 grainers?

    Link

    UpNorthAirGunner
    Participant
    Member

    From a very trusted long range airgunner source – Carl Matts (VeryBigRifle on YouTube)….The guy on YouTube plinking steel at 1000 yards over and over and over…  That guy.  He has calculated this bullet to be around .295 BC at the muzzle and .185 at 1000 yards.   This photo is from some of his groups off of the arsenal moulds website. He was shooting with a modded Condor – but I am getting these same higher velocities with a stock Texan .257. Pretty slippery little pill!  

    Link

    steve123
    Participant
    Member

    Sorry for the late thanks, I forget what threads I post in and I'm still learning to use the search function. 

Viewing 6 posts - 1 through 6 (of 6 total)

You must be logged in to reply to this topic.