Long Range Rifle/Scope/PRS question(s)

Discussion in 'Rifle Country' started by Walkalong, Dec 21, 2018.

  1. Walkalong

    Walkalong Moderator Staff Member

    Joined:
    Nov 20, 2006
    Messages:
    66,945
    Location:
    Alabama
    I took the gun apart because after I put the barreled action in the Matrix chassis rounds were a touch firm to chamber, like I was seating into the lands to fire form, or maybe I had gotten careless and the shoulders weren't moved quite far enough.

    After I took it out of the chassis the issue went away. Hmm, get to looking at everything and found two things.

    First, the hole in the chassis for the front action screw (Supplied with chassis), was a hair off (too far to the rear by a hair), so I "lengthened" it a few thousandths.

    Second, and the real issue, was the front action screw had a rub mark on the end of it, bad juju. I ground .010 off of the length and polished it.

    Problem solved, action is back to slick as snot like it should be. The Impact action wrench and the SAC barrel vise made disassembly/reassembly easy as pie. Naturally I cleaned the action all up real well while it was off the barrel. I ran one wet patch through the barrel, so it still needs cleaning from shooting the Altus match.
     
    South Prairie Jim likes this.
  2. Varminterror

    Varminterror Member

    Joined:
    Jul 17, 2016
    Messages:
    9,065
    Always pays off to inspect stuff like that! If you see something, say something, right? Glad you noticed the drag contact and slight bind of the front screw!
     
    Walkalong likes this.
  3. Walkalong

    Walkalong Moderator Staff Member

    Joined:
    Nov 20, 2006
    Messages:
    66,945
    Location:
    Alabama
    Had me puzzled for a bit, but after I determined it wasn't a brass or sizing issue, I figured it had to have something to do with putting it in the new stock, after all, that was one of the two things that had changed when it started doing it. New stock, with new screws, and a new batch of ammo.
     
  4. Walkalong

    Walkalong Moderator Staff Member

    Joined:
    Nov 20, 2006
    Messages:
    66,945
    Location:
    Alabama
    The new lot of RL-15 is slower, or my barrel has slowed down, or the lower temp plus barrel wear, or whatever, so I ran a little test after work today. I have been running 32.0 Grs of RL-15 behind a Berger 105 Hybrid with CCI-450 primers, .010 to .015 off the lands, which has increased and I have not chased.

    Loaded 32.0, 32.1, 32.2, & 32.3 in Lapua brass (fire formed 6 BR), and 32.0 in the slightly heavier Alpha brass. (First I have played with it, have 200 older cases and 200 new "OCD" cases.

    Sighted in lower right after removing the barrel, reinstalling it, and putting it back in the Matrix chassis, which I am fast becoming very fond of.

    Primers all look real good. 58 Degrees.
    6 Dasher Test Loads - New lot of RL-15 - Plus 3 Alpha Cases - Primers @ 25%.JPG 6 Dasher Test Loads - New lot of RL-15 - Plus 3 Alpha Cases - Target @ 28%.JPG
    6 Dasher Test Loads - New lot of RL-15 - Plus 3 Alpha Cases Pic 1 @ 25%.JPG
     
    South Prairie Jim and Nature Boy like this.
  5. MarshallDodge

    MarshallDodge Member

    Joined:
    Nov 7, 2005
    Messages:
    4,148
    Location:
    Utah, USA
    Is that 6BRA?

    I didn't get a whole lot of long range shooting in this year but I did get to do some 223 load development. 77 SMK with 8208 is shooting well in my AR, two 5 shot groups averaged .76"

    I had an older 6-24 Gen1 Vortex PST on my 6BR and moved it to a 223. It was acting a little funky when I went to zero it, taking 2-3 shots for the scope to settle in after adjustment. Time for an RMA.

    The 6BR got the dust blown off and I tried some 105 RDF bullets. No groups on paper but I shot steel at 2 and 300 yards and the splatter marks from 3 shots were touching.
     
  6. Walkalong

    Walkalong Moderator Staff Member

    Joined:
    Nov 20, 2006
    Messages:
    66,945
    Location:
    Alabama
    These are 6 Dasher. It has been stupid easy to load for. Shooting 105 hybrids.

    The 6 BRA is popular in 600 yard F Class I believe, and I have seen it at PRS matches.

    My buddy Jeff who works here keeps talking about shooting a straight 6 BR, some folks do.
     
    South Prairie Jim likes this.
  7. Walkalong

    Walkalong Moderator Staff Member

    Joined:
    Nov 20, 2006
    Messages:
    66,945
    Location:
    Alabama
    More info:

    The front action screw was slightly camming the bolt/lug up, pushing the case up, making the case body rub the chamber at the case head.

    Fortunately, the screw was rounded and polished, just a hair too long. It was easy to see the rear screw was ok when I first put it in the chassis, now I know to be more careful with action screws, although I did check the rear one.
     
  8. MarshallDodge

    MarshallDodge Member

    Joined:
    Nov 7, 2005
    Messages:
    4,148
    Location:
    Utah, USA
    Very nice. I had the opportunity to shoot a 6 Dasher over the weekend. The owner of the rifle said he was using Varget and 105 Berger Target bullets. It was a great shooting rifle with a Triggertech Diamond set at 6 oz.

    I still shoot my 6x47L most of the time when shooting beyond 800, but the 6BR is fun and very accurate. With Hornady 105 BTHP and RL15, my son used it to beat a 260, 7 Mag, and 6.5C in a little fun competition we put together with some friends. He was the only one to get a hit on the 1000 yard target because he did a better job reading the miserable wind conditions that day.

    Recently I started reading about guys making match ammo on their progressive press and I want to try doing that with the 6BR. They are still trickling the powder charge but everything else is done on the press, including sizing.

    RL15 is good powder and one of my favorites, but like you said, there is variance from lot to lot for some reason. Because Varget and RL15 is so hard to come by, I have been working on a load with Shooters World Precision and 112 Match Burners and will post some results. I am not counting on the MB's to be as good as Bergers but hopefully they will give the 6BR a little more distance.
     
    South Prairie Jim and Walkalong like this.
  9. Nature Boy
    • Contributing Member

    Nature Boy Contributing Member

    Joined:
    Apr 21, 2015
    Messages:
    5,907
    I would say the 6BR and variants are as easy to find a stable, accurate load for as is the .308 win.

    They use the same powders, so I wonder if that has something to do with it
     
    MarshallDodge and Walkalong like this.
  10. Walkalong

    Walkalong Moderator Staff Member

    Joined:
    Nov 20, 2006
    Messages:
    66,945
    Location:
    Alabama
    Regarding Varget and RL-15, most 6 Dasher shooters were using Varget, but I had less than 1/2 pound of it, where I had plenty of RL-15, so that is what I went with.
     
    South Prairie Jim likes this.
  11. MarshallDodge

    MarshallDodge Member

    Joined:
    Nov 7, 2005
    Messages:
    4,148
    Location:
    Utah, USA
    Varget always seems to be the answer but my most accurate load ever for my 6BR was with 8208XBR and 105 Nosler Custom Competition. Velocity was in the low 2600 fps but it shot a .21" group at 100. The only reason I tried it was because I happened to have it in the powder measure. 8208 has been one of my favorite powders for 223 and is now becoming unobtainable like varget.
     
    Walkalong likes this.
  12. Nature Boy
    • Contributing Member

    Nature Boy Contributing Member

    Joined:
    Apr 21, 2015
    Messages:
    5,907
    For my 6BRA the magic has come with H4895, which is a kissing cousin to 8208XBR

    I have 16 lbs of N140 and want to try it.

    I'll add this, with the 6BRA it seems everyone finds their node ~2,920. My rifle was no exception
     
    Walkalong likes this.
  13. MarshallDodge

    MarshallDodge Member

    Joined:
    Nov 7, 2005
    Messages:
    4,148
    Location:
    Utah, USA
    What is your bullet weight bullet or doesn't it matter?
     
  14. Nature Boy
    • Contributing Member

    Nature Boy Contributing Member

    Joined:
    Apr 21, 2015
    Messages:
    5,907
    I've shot 105 Hybrids, 108 BT Targets and the new 109 LRHT. By a slight margin, the 108s shot the best for me. All found their most accurate node in the low 2,900 fps area.
     
    South Prairie Jim and Walkalong like this.
  15. Walkalong

    Walkalong Moderator Staff Member

    Joined:
    Nov 20, 2006
    Messages:
    66,945
    Location:
    Alabama
    I was running 2950ish in the heat with Berger 105 Hybrids using the last lot of RL-15.
     
  16. South Prairie Jim

    South Prairie Jim Member

    Joined:
    Apr 18, 2019
    Messages:
    2,138
    Location:
    Libby Mt
    I switched from the 6 br to the bra this year, quite pleased so far and as others have posted the 2920 fps node seems to be the magic number.
    I use the 105 class bthp
     
    Walkalong likes this.
  17. Walkalong

    Walkalong Moderator Staff Member

    Joined:
    Nov 20, 2006
    Messages:
    66,945
    Location:
    Alabama
    What brass are you using for 6 BRA?
     
  18. South Prairie Jim

    South Prairie Jim Member

    Joined:
    Apr 18, 2019
    Messages:
    2,138
    Location:
    Libby Mt
    Blue box Lapua
    I had not turned any case necks until this rifle so that's new experience , a friend gave me a fire form barrel so that saves BL for sure.
     
    Last edited: Dec 17, 2020
  19. South Prairie Jim

    South Prairie Jim Member

    Joined:
    Apr 18, 2019
    Messages:
    2,138
    Location:
    Libby Mt
    Ha'
    I could start a thread on how I "did not " save money turning and fire forming my own brass rather than just paying DJs Brass service:oops:
     
    MarshallDodge likes this.
  20. Walkalong

    Walkalong Moderator Staff Member

    Joined:
    Nov 20, 2006
    Messages:
    66,945
    Location:
    Alabama
    Anyone you know shooting Alpha 6 BRA?

    I just started playing with it in Dasher
     
  21. MarshallDodge

    MarshallDodge Member

    Joined:
    Nov 7, 2005
    Messages:
    4,148
    Location:
    Utah, USA
    A friend sold me a bottle of Varget so I loaded up some with 105 RDF's and went down to test them at the range. I shot four 3 shot groups. The two at 100 were ragged holes so I shot steel at 300 and made two tight splatter marks. I'm going to take them to the long range today to try out.

    I typically like to shoot 5 shot groups but in the interest of ammo conservation, I reduced my shots.
     
  22. South Prairie Jim

    South Prairie Jim Member

    Joined:
    Apr 18, 2019
    Messages:
    2,138
    Location:
    Libby Mt
    IIRC Stan Taylor was and maybe Dusty Stevens, that probably saves a ton of time over false shoulder and FF
     
  23. South Prairie Jim

    South Prairie Jim Member

    Joined:
    Apr 18, 2019
    Messages:
    2,138
    Location:
    Libby Mt
    I read threads on Peterson/Dasher also but no experience with them
     
  24. Walkalong

    Walkalong Moderator Staff Member

    Joined:
    Nov 20, 2006
    Messages:
    66,945
    Location:
    Alabama
    I need to get 50 and try it
     
  25. MarshallDodge

    MarshallDodge Member

    Joined:
    Nov 7, 2005
    Messages:
    4,148
    Location:
    Utah, USA
    I started off with the day with a new 6BR load, 105 Hornady BTHP with 27.4 grains of SW Precision. I held dead center of the head at 220 yards. My shot is the one with the yellow dot next to it, and it hit low as the gun is zeroed for the 105RDF/Varget.


    20201218_153358_resize_78.jpg

    Next up was 300, still low, and this time a litte right. I didn't feel great about the shot and probably pulled it a touch right.

    20201218_133346.jpg

    Sent one at 400. Again, yellow dot is me.

    20201218_154922.jpg

    500 yard steel got another 105 BTHP and then I put a 105 RDF on the 600. Dead on with Strelok.
    20201218_112013_resize_50.jpg

    Up next was a ram at 825. Wind had started to push from the right so I held on his tail just to see how much. I put two on it. It's kind of strange how one bullet blew up more than the other.

    20201218_111246_resize_18.jpg
     
    Last edited: Dec 18, 2020
    Walkalong, taliv and Nature Boy like this.
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice