Factory 123gr SST Velocity Check 18" barrel

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  • LRRPF52
    Super Moderator
    • Sep 2014
    • 8569

    Factory 123gr SST Velocity Check 18" barrel

    Just got back from a bunch of velocity testing at the range.

    Hornady 123gr SST, Lilja 318 barrel, 64* F

    2451
    2449
    2473
    2456

    Avg: 2457
    ES: 24







    NRA Basic, Pistol, Rifle, Shotgun, RSO

    CCW, CQM, DM, Long Range Rifle Instructor

    6.5 Grendel Reloading Handbooks & chamber brushes can be found here:

    www.AR15buildbox.com
  • A5BLASTER
    Chieftain
    • Mar 2015
    • 6192

    #2
    Thanks for that data sir.

    I wonder how close my 18 in jp barrel will be running with 123 sst rounds compared to your data.

    Comment

    • JASmith
      Chieftain
      • Sep 2014
      • 1620

      #3
      Those numbers are consistent with my string of 33 shots taken over a year's period in my 18" Bullberry barrel (Encore):

      Count 33
      Average 2475
      SD 23
      ES 91
      shootersnotes.com

      "To those who have fought and almost died for it, freedom has a flavor the protected will never know."
      -- Author Unknown

      "If at first you do succeed, try not to look astonished!" -- Milton Berle

      Comment

      • Cornbread
        Warrior
        • Dec 2015
        • 288

        #4
        The Lilja 318 profile barrel is 18.8"?

        Comment

        • danm
          Warrior
          • Aug 2014
          • 498

          #5
          I get closer to 2500 avg in my BHW 18" 1:9... sorry no chrono shots...

          Comment

          • m796rider
            Warrior
            • Jul 2011
            • 398

            #6
            Originally posted by Cornbread View Post
            The Lilja 318 profile barrel is 18.8"?
            Sort of... Lilja includes the entire barrel extension in their length figures so to get the "ATF" length (i.e. measured from the bolt face) you have to subtract about .75".

            Comment

            • LRRPF52
              Super Moderator
              • Sep 2014
              • 8569

              #7
              My barrel is actually 17.6" on this one. I had some work done to it.

              Shot side-by-side with another Lilja 318, they are within 20fps of each using the same loads.
              NRA Basic, Pistol, Rifle, Shotgun, RSO

              CCW, CQM, DM, Long Range Rifle Instructor

              6.5 Grendel Reloading Handbooks & chamber brushes can be found here:

              www.AR15buildbox.com

              Comment

              • KaizenUSMC
                Unwashed
                • Dec 2015
                • 1

                #8
                Attached.
                Attached Files

                Comment

                • BoxofRox
                  Bloodstained
                  • Dec 2015
                  • 82

                  #9
                  I measured like 20-30 shots and came up with 2530 from my Lilja 319 barrel.

                  Comment

                  • Immamedic
                    Unwashed
                    • Nov 2015
                    • 3

                    #10

                    Comment

                    • LRRPF52
                      Super Moderator
                      • Sep 2014
                      • 8569

                      #11
                      2538fps is pretty fast for an 18". Nice.

                      How does it shoot? If posted elsewhere, post the link.
                      NRA Basic, Pistol, Rifle, Shotgun, RSO

                      CCW, CQM, DM, Long Range Rifle Instructor

                      6.5 Grendel Reloading Handbooks & chamber brushes can be found here:

                      www.AR15buildbox.com

                      Comment

                      • Immamedic
                        Unwashed
                        • Nov 2015
                        • 3

                        #12
                        Anything I can provide to reference how well it shoots will be opinion and I know I was not doing my part as a shooter; still learning techniques for shooting from a tripod and ballhead. I've only shot for marginal 4" groupings, as the gun was built, sighted and put to work quickly. I can say that it has achieved vital kill shot placement out to 440 yards on whitetail and yotes.

                        The next opportunity I have to spend some time on paper, I will certainly post results. The lack of time to do so, is why I'm shooting factory ammo currently. I've been reading on this site for quite some time and found a few recipes for hand loads I would like to try.

                        I suspect my suppressor is skewing the velocity as well, as my 14.5 5.56 is running hot velocities on 77gr SMKs. Saker762.

                        I'll be sure to chrono a string without the suppressor as well.
                        Last edited by Immamedic; 07-07-2016, 08:09 PM. Reason: Picture

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