Barnes 127LRX Shortening

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  • GSPHunter
    Warrior
    • Jun 2014
    • 106

    Barnes 127LRX Shortening

    Hello all,

    Has anybody tried to cut these down to 120gn? After chucking them in a unimat, I can't seem to tighten up the chuck tight enough to hold the bullet so as to keep it from chattering/moving without damaging the bullet. Other than the jaw marks, they turn out nice and at 120gn, there's still ~.100" of boattail left.

    If no luck on the modification, How fast should I expect to be able to push the unmodified bullet out of a 20" barrel......I could probably live with 2300FPS from the muzzle, assuming the bullet will expand down to the advertised 1600FPS.

    Any advise you all could give would be appreaciated!
  • rasp65
    Warrior
    • Mar 2011
    • 660

    #2
    GSPH The gentleman on this forum with the expertise in shortening bullets is SneakyOne.

    Comment

    • GSPHunter
      Warrior
      • Jun 2014
      • 106

      #3
      After thinking about it more, I think I'd need to make or buy a collet that would spread the pressure from the chuck jaws. I still might try it, but for now, I'd like to see what the unmodded bullet can do.....The Barrett MSG bullet shape is definitely calling in the back of my mind though :-)

      Comment

      • sneaky one
        Chieftain
        • Mar 2011
        • 3077

        #4
        I'll just wait for feedback. Lot of things going on here recentely. Can barely keep up with demand upon this cool 6.5 forum- as per fill the pill box.

        Welcome in , gspH. PM me , son... --What's your locale? Beware the runout - past .00011 beast!!!!!!!

        Thanks Rasp- been busy with the Californy boys as of late. Much more upon that to follow in the fall.
        Last edited by sneaky one; 07-26-2014, 03:17 AM.

        Comment

        • sneaky one
          Chieftain
          • Mar 2011
          • 3077

          #5
          Remember the 1980 ZZ Top song- We Baddd - were nationwide?
          That's been my life recentely= busy guy. 6 years of this , or that- non stop bullet tweaks, sent to most states in the lower 48. Life is fun., yet too busy somedays.
          I - we are on a mission now to get a few perfect wts. of pills made for hunting apps. teaser..

          Comment

          • sneaky one
            Chieftain
            • Mar 2011
            • 3077

            #6
            So, gsph, The issue I found with these , and a similar pill is., the meplat-center body is not long enuf to hold it in a concentrical spin. The other is the 12? Accubond., the other newest unit on the market. Bugger .

            Comment

            • GSPHunter
              Warrior
              • Jun 2014
              • 106

              #7
              Hi Sneakyone,
              Thanks for the reply. I didn't think about runout issues when I was just shortening the bullet, but now that you bring it up, I doubt I could hold better that .0005" using the non autocentering 4 jaw chuck! I live in Fairbanks, AK, and would really like to take the Grendel out for some winter moose hunting, that's why the LRX is so tempting. Finally had a chance to throw a few rounds through the chronograph in the back yard today....30.0 gn of LVR at 2.285" COL gave about 2330FPS with no more room for powder but no pressure signs. It'll be interesting to see if the bullets get stabilized and how well it'll shoot.

              Comment

              • rickOshay
                Warrior
                • Apr 2012
                • 784

                #8
                Hi GSP - moose are on the extreme upper limit for the Grendel. But you're right in looking to a large solid bullet. The key will be the lower velocity limit for bullet expansion. Barnes TSXs are relatively high at 2000 fps. Hopefully the LRX is lower - will be testing these shortly.

                Have you considered the 140 gr Lapua Naturalis? It has a stated lower limit velocity of about 1640 fps and is shorter than the LRX.
                http://www.65grendel.com/forum/showt...-bullets/page2 See post #15

                Comment

                • GSPHunter
                  Warrior
                  • Jun 2014
                  • 106

                  #9
                  Hi Rick,
                  Its funny to me on how my thinking on rifles has changed....For 20 years I've only used a .338 win mag :-) Last year I took my wifes 7x57 carbine, It was accurate, and so much more comfortable to wear all day while riding a snowmachine. My Grendel weighs a pound more, but the universal sling makes it lay so nice on the back, I can't help but want to take it out this year.

                  I don't think I'd ever take a front quartering shot on a moose with the Grendel regardless of the bullet, but the last moose my hunting partner got was about a 600lb cow at 80ish yards using a 7.62x39mm and factory winchester 123gn softpoints. Bullet went through a rib going in and coming out with a complete pass through. She took a couple steps and went down. I'm sure the Grendel would've done the same.

                  Thank you for the suggestion on the naturalis, If the LRX's won't shoot, I'll definitely give them a try. It might be worth clipping off the tip of the LRX off to gain a bit more room for the powder, I haven't tested to see how far out I can seat it before hitting the lands.

                  Comment

                  • sneaky one
                    Chieftain
                    • Mar 2011
                    • 3077

                    #10
                    We both will have some good data soon, to chat upon. RickO & I. We've been busy, He more than I, yet I have a few more newly found ideas to check out..
                    Pm me if you want a couple of those 127's tweaked-

                    Comment

                    • acourvil
                      Warrior
                      • Dec 2013
                      • 112

                      #11
                      Originally posted by rickOshay View Post
                      The key will be the lower velocity limit for bullet expansion. Barnes TSXs are relatively high at 2000 fps. Hopefully the LRX is lower - will be testing these shortly.
                      According to Barnes, "we have lowered the minimum impact velocity to achieve expansion from 2000 fps (for most of the Tipped TSX calibers and weights) to 1600 fps for all of the LRX bullets."

                      Comment

                      • rickOshay
                        Warrior
                        • Apr 2012
                        • 784

                        #12
                        Originally posted by acourvil View Post
                        According to Barnes, "we have lowered the minimum impact velocity to achieve expansion from 2000 fps (for most of the Tipped TSX calibers and weights) to 1600 fps for all of the LRX bullets."
                        I'm hoping that's the case. I will be shooting some gels soon to confirm - as we did in Chapter 6 of Volume 2 of the Reloading Handbook. In my tests, the TSX only partially opened at 2000 fps (Figure 6.7, page 49).

                        The only challenge will be stopping the LRX in the gels. Likely it will penetrate >34" at low velocity.

                        Comment

                        • cory
                          Chieftain
                          • Jun 2012
                          • 2985

                          #13
                          Originally posted by rickOshay View Post
                          I'm hoping that's the case. I will be shooting some gels soon to confirm - as we did in Chapter 6 of Volume 2 of the Reloading Handbook. In my tests, the TSX only partially opened at 2000 fps (Figure 6.7, page 49).

                          The only challenge will be stopping the LRX in the gels. Likely it will penetrate >34" at low velocity.
                          What did y'all put in front of the gel to duplicate the effects of animal hide or human skin?
                          "Those who sacrifice liberty for security, deserve neither." Benjamin Franklin

                          Comment

                          • rickOshay
                            Warrior
                            • Apr 2012
                            • 784

                            #14
                            Originally posted by cory View Post
                            What did y'all put in front of the gel to duplicate the effects of animal hide or human skin?
                            We chose not to place anything in front. The comparisons were done primarily to compare the effects of bullet construction on penetration, expansion, and retained weight. We were not trying to simulate performance on game.

                            Comment

                            • cory
                              Chieftain
                              • Jun 2012
                              • 2985

                              #15
                              Originally posted by rickOshay View Post
                              We chose not to place anything in front. The comparisons were done primarily to compare the effects of bullet construction on penetration, expansion, and retained weight. We were not trying to simulate performance on game.
                              Were the bullets were designed for expansion on game?
                              "Those who sacrifice liberty for security, deserve neither." Benjamin Franklin

                              Comment

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