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Thread: Labradar 5.56 data 1168

  1. #31
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    Quote Originally Posted by AndyLate View Post
    I'm asking from curiosity; do you think the pressure signs are showing due to the supressor(s) or caused by individual barrel differences? I understand it is academic at this point.

    Andy
    Not the op but most likely differences in chambers. I have the same issue with my 77gr tac load. My arp barrel barrel blew out primers before I hit published 556 load data, but my fn barrel has no issue.

    Sent from my SM-G973U using Tapatalk

  2. #32
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    @1168:

    I have a BRT 16" MPR and it did the following:

    "63*F 49% humidity

    Wolf 55gr avg 2918 sd 21 Es 51

    M855 62gr avg 2971 sd 15.5 Es 37"

    Mine seems to be just a little bit faster than your 16" LPR, but they should be comparable in everything except the profile.
    Tactical Nylon Micro Brewery

  3. #33
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    Delete
    Last edited by 1168; 02-19-22 at 21:58.

  4. #34
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    65*F

    *12” stainless PCC / 147gr Blue bullets

    3.8gr CFE Pistol
    1069 av
    24 es
    8.8 sd

    4.2gr CFE Pistol
    1139 av
    28 es
    10.1 sd

    This may not be the best powder for subs.

    *G19/Odessa 2 baffles/Griffin threaded barrel/ 147gr Blue bullets

    3.9 CFE Pistol
    938 av
    53 es
    15.3 sd

    4.0 CFE Pistol
    970 av
    18 es
    6 sd

    4.1 CFE Pistol
    987 av
    38 es
    13 sd

    4.2 CFE Pistol
    995 av
    29 es
    9.2 sd

    4.3 CFE Pistol (book max)
    1009 av
    32 es
    9.6 sd



    * PSA 14.5” chrome lined, Chimera

    M855
    2992 av
    51 es
    16.2 sd
    I got this same average previously in a Noveske stainless 14.5”, which was a pretty fast barrel. This barrel concerns us a bit, since my own PSA 16” barrel did not pass the 5.56? gauge test, so this one also may be “tight”. We also had to mortar it a few times later in the day.

    25.6 WC846/62gr Hornady FMJ ***dangerous***
    3009 av
    47 es
    14.9 sd
    As you can see, even in cooler weather, its hotter than M855. We’ll have to wait for it to get cold to shoot it up. (Don’t take that as advice)



    *12.3” Hanson / Turbo K

    M855
    2752 av
    69 es
    18.9 sd

    Tula 55gr fmj
    2750 av
    55 es
    20 sd
    Most consistent of the 3 55gr loads chronoed today…

    Winchester “m193” (store bought)
    2828 av
    176 es
    58.7 sd

    Aguila 55gr .223
    2758 av
    78 es
    30.5 sd

    Hornady Frontier 68 gr 5.56
    2652 av
    47 es
    15.3 sd
    Last edited by 1168; 03-19-22 at 16:11.

  5. #35
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    Quote Originally Posted by Bimmer View Post
    Some of those extreme spreads are HUGE...
    Took the words right out of my mind as I was reading through that data.

    Those are ridiculously high ES numbers.

  6. #36
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    Quote Originally Posted by HKGuns View Post
    Took the words right out of my mind as I was reading through that data.

    Those are ridiculously high ES numbers.
    You’re not wrong

  7. #37
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    1168 or anyone else with a Labradar...could yall run these side by side with a regular chrono..something like a ProChrono just to see how accurate the less costly chronos are?
    I had up some good chrono info myself, was up for six/seven months then some dipshit said if I took those wth an optical chrono.."I can throw those results in the garbage".
    So I went back, deleted errthang and did just that.
    Would be cool to see how close they would be tho.
    Last edited by Straight Shooter; 11-26-21 at 13:37.
    The obedient always think of themselves as virtuous rather than the cowards they really are.

  8. #38
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    Quote Originally Posted by Straight Shooter View Post
    I had up some good chrono info myself, was up for six/seven months then some dipshit said if I took those wth an optical chrono.."I can throw those results in the garbage."
    So I went back, deleted errthang and did just that.
    Would be cool to see how close they would be tho.
    Not quite what you asked, but here's a comparison of various chronos:

    https://www.longrangeonly.com/forum/...er-chrono.144/

    http://bulletin.accurateshooter.com/...vs-oehler-35p/


    My 2¢: An optical chrono is precise enough. I have a ProChrono, and it meets my needs.

    Mostly I'm clocking pistol rounds, and minor variations (<3%) because I don't have it set up perfectly straight or whatever don't really matter. (I'm not worried about testing for power factor, just clocking my reloads because I'm a geek.)

    For rifle rounds, again, I don't think a couple percentage points really matters in terms of load development and/or calculating trajectories.

    Or rather, if I was going to spend $500 on a new toy, it wouldn't be a fancy chrono...

  9. #39
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    Delete
    Last edited by 1168; 02-19-22 at 21:58.

  10. #40
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    Any black Friday deal on a lab radar?

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