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Long Range Rifle/Scope/PRS question(s)

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

  1. Nature Boy

    Nature Boy Member

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    Be a ground breaker and dual wield them bad boys at the next PRS match
     
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  2. Walkalong

    Walkalong Moderator

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    I loaded up for the Match that got postponed until Dec 14th so I had some time on my hands. I have been wanting to load up 32.3 Grs RL-15 as well as go from the Wilson .266 bushing to the Wilson .265 bushing. I sized ten cases with the .265 bushing and a .239 pin gauge would pass the neck and a .240 would not. That spoke well for Wilson quality control because the cases sized with the .266 bushing would accept the .240 pin gauge but not the .241. It did not necessarily increase neck tension feel while seating as much as it made it more consistent. No more "hmm, that felt lighter" ones.

    I loaded those slightly tighter in the neck cases with 32.3 Grs of RL-15 vs 32.0, as well as seating them out .005 longer. Yea, I know, I changed three things.

    The velocities I got today backed up why I had issues shooting high at Blakely. I had guessed at a velocity to put in the ballistics program for cooler weather as I had not shot the Dasher in anything but 90 plus temps. I had shot the 6 Creed in the Seekins at 74 & 95 degrees for 2900 & 2985 FPS.

    I had to bump the temp up to 94 in the App to get the Mils right in mid 70's weather, and later tweaked my cool weather velocity up. Today verified that I was shooting faster than I guessed in the cooler weather at the match when I blanked the stage shooting high. Barrel seems to have sped up a little as well.

    I had an average of 2905 for ten shots at 94 degrees in August for Load # 4 that I shot at the two matches.


    Load # 4 today.
    68 Degrees 74% RH Cool heavy air with very light wind.

    First five shot group.
    HI=2911
    LO=2898
    Avg=2901
    ES=13
    SD=5

    Second five shot group.
    HI=2936
    LO=2911
    Avg=2919
    ES=25
    SD=10

    Load # 5 today. (.005 longer, .3 Grs more powder, .001 tigher bushing)
    68 Degrees 74% RH

    First five shot group.
    HI=2936
    LO=2923
    Avg=2931
    ES=13
    SD=5

    Second five shot group.
    HI=2943
    LO=2930
    Avg=2934
    ES=13
    SD=5

    I shot back to back groups with Load # 4 & Load # 5 and chroned them. Then I shot two more groups back to back with Loads # 4 & # 5. I shot the last group (Load # 5) with a guy yapping in my ear wanting to go downrange and post targets. I had told him let me shoot five more shots and he could have it, but instead of going away he yapped and yapped an yapped in my ear while I hurriedly sent five down range to get him to shut up.

    Groups for Load # four were .494 & .480. Groups for Load # 5 were .430 & .382. Load # 5 groups were more rounded as well.

    So Load # 5 edged out Load # 4 in group size and the ES, SD, & Avg stayed more consistent. This is a small sample and doesn't prove a lot, but it looks good for the slightly tighter neck tension and a hair more powder. Seems to have settled the numbers down a little. I'll try a repeat performance soon.

    The primers looked great, just like they did at mid 90's temps, no firing pin flow, flat in the middle but very well rounded on the edges. Look great to me.

    ..........................................................................................................................Top right Avg for Load # 5 should be 2934
    Targets - Loads # 4 & # 5 - 6 Dasher - Impact Precision Rifle @ 45#.JPG Data - Loads # 4 & # 5 - 6 Dasher - Impact Precision Rifle Pic 3 @ 50%.JPG Primers - Loads # 4 & # 5 - 6 Dasher - Impact Precision Rifle @ 58%.JPG Primers - Load # 5 - 6 Dasher - Impact Precision Rifle @ 80%.JPG
     
  3. taliv

    taliv Moderator

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    nice. you're shooting 100 fps faster than i am
     
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  4. Walkalong

    Walkalong Moderator

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    Do you by chance know the ID of your sized necks?
     
  5. taliv

    taliv Moderator

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    No I don’t have any fancy pin gages. Where’d you buy those
     
  6. Walkalong

    Walkalong Moderator

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    Amazon, I bought the midrange ones. Good enough for my purposes.

    https://www.amazon.com/gp/product/B00UCQO4HM/ref=ppx_yo_dt_b_asin_title_o08_s00?ie=UTF8&psc=1

    I always just went by feel seating bullets in my Bench gun, but since I have the pin gauges now I checked the necks with them both fired and sized.

    https://www.newmantools.com/meyer/pluggage_ABC.htm

    https://www.meyergage.com/abcs-of-gages/differences-between-z-zz-classes-of-gages/

    https://www.gagesite.com/documents/Gage Makers Tolerance Chart PQI.PDF

    When you get the really good ones you need to know the temperature and the heat from your hand can change them. Too close for me.
     
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  7. Walkalong

    Walkalong Moderator

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    Pin Gauges come in handy for checking revolver throats etc. Easier than using inside micrometers or small hole gauge sets.

    Notice the little tool to check the micrometer is marked .20004 at 20 Degrees Celsius.
     
  8. Walkalong

    Walkalong Moderator

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    The machinists here could likely point us to a better deal or better quality pin gauges. @MachIVshooter in particular.
     
  9. Nature Boy

    Nature Boy Member

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    Take this for what it’s worth.

    2,930 is a node that gets repeated over and over for all the 6BR variants from dozens of shooters pursuing the optimum load for these cartridges

    Varget, H4895, 105 Hybrid, 108 BT, 6 Dasher, 6 BRA, 6 BRDX, doesn’t matter. Get to 2,930 and shoot small

    It really is remarkable
     
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  10. MarshallDodge

    MarshallDodge Member

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    Interesting new powder from Winchester

     
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  11. taliv

    taliv Moderator

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    Interesting
     
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  12. Varminterror

    Varminterror Member

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    I expect this is what I’ve been seeing Shane & Jaclyn Bryan shooting the last few months, under secrecy. They’ve spoken very highly about it, dropping charges and getting single digit SD’s. All great things, as can be expected from any previewer, naturally.
     
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  13. Walkalong

    Walkalong Moderator

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    Indeed, although stick powders have always ruled at long distance.
     
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  14. Walkalong

    Walkalong Moderator

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    I wonder where it falls on the burn rate chart.
     
  15. Nature Boy

    Nature Boy Member

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    I'm going to take a wild guess and say somewhere around the RL16 - H4350 area
     
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  16. Walkalong

    Walkalong Moderator

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    From the Teslong Bore Scope I just hooked up to my Android phone.

    It has 10 shots down the bore since I cleaned it after fire forming 100 rounds. I was able to find a couple of spots with tiny green dots. (Real tiny)
    [​IMG]
     
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  17. peterk1234

    peterk1234 Member

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    I have no idea what you guys are talking about but it is really interesting reading. I am blown away by what you guys know. Very cool. Okay, I will shut up now. Pete
     
  18. Walkalong

    Walkalong Moderator

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    Turns out there is a crude focus, I need to play with it.
     
  19. z7

    z7 Member

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    Pete, don’t shut up, most of this thread is to help spread knowledge and offer info to people who might be interested in long and medium range shooting who think it is supper difficult and involves lots of science and math - this should reduce the intimidation factor

    long range is a discipline just like any other, it takes some effort to learn, takes some Money to buy in and is very fun, but don’t think that you need to be quiet or that you know nothing
     
  20. Nature Boy

    Nature Boy Member

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    I’m getting one of those when they come out with a Bluetooth version, supposed to be next month
     
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  21. Nature Boy

    Nature Boy Member

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    ditto. Keep asking questions
     
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  22. Varminterror

    Varminterror Member

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    Absolutely.

    I always assume, presume maybe, if I can figure something out, it can’t be that terribly difficult. Just have to identify holes in your knowledge base, and ask questions to fill them.

    Most importantly - try it. So many folks get caught up in what seems impossible, they never take a chance to prove themselves wrong.
     
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  23. Nature Boy

    Nature Boy Member

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    Iosso and Kroil on a patch wrapped around a jag worked back and forth in that area will clean that carbon right up
     
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  24. Walkalong

    Walkalong Moderator

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    I am not trying to get it squeaky clean.
     
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  25. Walkalong

    Walkalong Moderator

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    [​IMG]
     

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