AR-15 Accuracy Destroyed by Heat? Myth or Reality...

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  • เผยแพร่เมื่อ 9 ม.ค. 2025

ความคิดเห็น • 33

  • @BigJazzHands
    @BigJazzHands 3 หลายเดือนก่อน +16

    Another fantastic study. Your videos deserve way more views, this is great content.

    • @PrestonJMoore
      @PrestonJMoore  3 หลายเดือนก่อน +2

      Thank you!! Glad you enjoy it!

  • @liggerstuxin1
    @liggerstuxin1 2 หลายเดือนก่อน +6

    Where is this channel BEEN all my life?!

  • @CaveLife652
    @CaveLife652 2 หลายเดือนก่อน +3

    I just did a similar test for a buddy who claimed he was getting heat dispersion through his Aero 14.5 pin and weld. I ran 140 rounds in about 40 minutes. I shot four groups of five rounds to establish a baseline of accuracy. Two groups of Hornady 68gr BTHP match, and two groups of AAC 77gr HPBT match. Then shot two 20 round groups of Winchester M193 (which performed terribly ~4.5-6MOA) then repeated the same course of fire. At the end I shot 4 more test groups with the same two match loads. The final gas block temp was 383F, the final round of groups were the best of the day the final Hornady group was 1.21MOA and the final AAC group was 1.1MOA. The average for each across all groups was 2.13 MOA for the Hornady and 1.81MOA for the AAC. There was a significant outlier group for the Hornady however ~3.5MOA, if you remove that group it brings the average down to 1.83MOA.

  • @jakev7005
    @jakev7005 22 วันที่ผ่านมา +1

    Keep it up.. Good attention to detail. . . Something others may not notice: Using 30 shot groups is STATISTICALLY relevant, speaks volumes about his approach, and the data thats generated will be far more accurate. 30 round groups is not because of magazine capacity.

  • @whitlock3076
    @whitlock3076 2 หลายเดือนก่อน

    Please keep making these videos! I love the thoroughness and attention to detail. I would like to see how some of Centurion Arms barrels perform.

  • @jason91notch
    @jason91notch 3 หลายเดือนก่อน +6

    Another great video, thanks.

  • @chrispearce9224
    @chrispearce9224 2 วันที่ผ่านมา +1

    Wow, great information.
    Why did I have to find your channel right at bed time. LoL.

  • @liggerstuxin1
    @liggerstuxin1 2 หลายเดือนก่อน +2

    I love this type of content

  • @joshuamiguez8119
    @joshuamiguez8119 3 หลายเดือนก่อน

    You are pulling on all of my heart strings with these videos. This is great content. Thank you

    • @PrestonJMoore
      @PrestonJMoore  3 หลายเดือนก่อน +1

      Thanks man!! More content is on the way!

    • @joshuamiguez8119
      @joshuamiguez8119 3 หลายเดือนก่อน

      @@PrestonJMoore thank you. I’m looking forward to it.

  • @dancarter7009
    @dancarter7009 2 หลายเดือนก่อน +1

    Great info once again! 🤙🏻

  • @aidenhall9832
    @aidenhall9832 3 หลายเดือนก่อน +2

    Fantastic video. May I suggest a White Oak Armament 18” SPR barrel. They offer it in 1/7 and 1/8 twist. They use Wilson blanks as well. I’d be curious to see if there truly is a difference in group size (due to stability of the round) in the 2 barrels. Maybe do 77gr, 69gr and basic 55gr ammo.

    • @elmer6535
      @elmer6535 3 หลายเดือนก่อน

      I have the same barrel. Extremely accurate, I love it.

    • @aidenhall9832
      @aidenhall9832 3 หลายเดือนก่อน

      @@elmer6535 I had one. I had the mid length 1/8. Super accurate. Unfortunately had to regime the rifle. Needed some cash. But I still have a 16” barrel from them. Shit lights out brand new. But after 4 years of 3 gun it’s toast.

    • @elmer6535
      @elmer6535 3 หลายเดือนก่อน

      ​@aidenhall9832 That is a expensive barrel for 3 gun no?😂. Mine is on a varmint set-up... 18" rifle length gas. Sweet shooter!

  • @uzbekistanimale
    @uzbekistanimale 3 หลายเดือนก่อน +1

    10 minutes for 90 rounds? Thanks for the great test, the barrel must've been quite hot by the end of the test

  • @koolerthanapolarbear
    @koolerthanapolarbear 2 หลายเดือนก่อน

    That was great thank you

  • @Wmbhill
    @Wmbhill 3 หลายเดือนก่อน +1

    Awesome video. Thanks for making it. I had a barrel years ago that when it got hot, the POI would move up a couple inches at 100 and the groups would open up, just enough to be sure it was happening, but nothing drastic. It had a light weight profile and it never shot very tight groups anyway. Otherwise, in the many AR barrels I’ve seen, I haven’t noticed this being as much of a thing as I’ve heard about.
    You mentioned temp stability of powder, I also run VV N140 W/ 77 gr SMK’s. I wonder if something like H335 with all the nitro would change things. I bet after 30 plus rounds or so, the ammo would get hot enough to raise your velocity some, maybe that would change your POI. You’d need some lighter bullets though.
    What primers do you use with that combo? I’m using Fed GMMAR’s and they seem to produce good results. Love that N140, but I get better velocity with N540.
    Thanks again

    • @PrestonJMoore
      @PrestonJMoore  3 หลายเดือนก่อน

      For this load, I just used some Fiocchi primers I had laying around. These weren't my highest quality reloads. I just needed something consistent enough for the test.
      Yeah, it would be interesting to see if different powders would affect things in a test like this.

  • @floofsamoyed
    @floofsamoyed หลายเดือนก่อน

    I hope you come back and make more vids

  • @le4kyf4ucet54
    @le4kyf4ucet54 3 หลายเดือนก่อน +1

    Could the flyers on the 16" barrel be caused by the muzzle device? All else being equal that's one of the only differences between 2 inches of length and some barrel weight

  • @X-ForceBro
    @X-ForceBro 2 หลายเดือนก่อน

    Subtract the worst 3 shots from every 30 round group and you get your 90% accuracy group 90% of the time this is how accurate your gun will shoot

  • @SinginShooter
    @SinginShooter 3 หลายเดือนก่อน

    I wonder if receiver fit influenced the outliers.

  • @liggerstuxin1
    @liggerstuxin1 2 หลายเดือนก่อน

    Can you test a criterion “core” barrel? I’d like to see the tapered barrels compared to

  • @3of11
    @3of11 2 หลายเดือนก่อน +1

    Any chance you can get to a 100yd indoor range to control for wind and temperature and is a more controlled environment . (You’d be amazed how the sun can heat up ammo and change its fps!). A little fart of wind between you and the flag. All those little “what ifs” are all solved by an indoor range.
    I thankfully have one nearby I use for testing 22lr accuracy for NRL22.
    Also how about a dedicated gun vise? To completely remove shooter effects. (My indoor range has poured concrete benches)

    • @PrestonJMoore
      @PrestonJMoore  2 หลายเดือนก่อน

      There are not 100 yard indoor ranges around my area that I know of. So, you probably won’t see any of that from me any time soon, unfortunately. I agree that it would be and nice way to control more variables, but this is what I got.
      Any recommendations on a dedicated gun vise?

  • @X-ForceBro
    @X-ForceBro หลายเดือนก่อน +2

    I wanted to build a precision AR-15 man what is your top barrel pick right now?

    • @PrestonJMoore
      @PrestonJMoore  หลายเดือนก่อน +1

      If money is not a factor, I would go with a custom Bartlein or Kreiger. Proof Research seems to have a good reputation, but I have never owned one. I like Criterion’s a lot. And Rosco’s are really good for the money. I haven’t had the best luck with Faxon or Ballistic Advantage.

  • @generalbakedpotato6150
    @generalbakedpotato6150 3 หลายเดือนก่อน

    It's normal to not but throw out outliers. It's statically going to happen to every test you'll ever conduct, I wouldn't sweat it too much. You could argue ~3% is a significant figure but the amount of rounds you'd use to recreate the same senero probably isn't worth it.
    I'm guessing the sudden shift has to do with the thermal expansion of the steel being similar. Bc regardless of thickness it's going to expand especially the rifling.
    I guess another bit of measurement that'd be helpful but it'd be unreasonable to ask is thermal data on the exterior of the barrel. So at least you'd have some data to correlate with per shot.

  • @honeyforce996
    @honeyforce996 3 หลายเดือนก่อน +1

    I wish you could clone yourself, and serve as content moderator for all of youtube