Poor man’s Blackout – 100gn NLG PB .225 for AR15

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  • #489052
    jonasbjork
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      Based on the initial discussion in the thread below, I am looking for interested parties to fill the list for a NOE buy if possible.

      http://castboolits.gunloads.com/showthread.php?323456-Poor-man-s-Blackout-100gn-subsonic-223-Rem&p=3893396

      100gn.
      Plainbase.
      No lube groove for powder coating.
      RN/spitzer type for feeding in semiautomatic.
      Specs outlined, but not finished (true cast bullet drawing and .223/Wylde chamber consideration appreciated).

      This is a jacketed 100gn that I extrapolated some rough measurements from:

    Viewing 15 replies - 106 through 120 (of 147 total)
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    • #505966
      troymesa
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        The non-lube groove versions will be in the store under the HTC section.  I believe the .225’s are done and Al said he hopes to get the .226 sizes listed and discount codes out today.  Stay tuned!

        Thanks! Had a little trouble logging in to my account called the shop and Al helped me out.  Done!

        #505967
        AlvinYork
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          I ran the other powders suggested

          Psi is at 7″
          Fps at 16″ (the barrel length)

          Pwdr.    Chg.      Psi.        Fps
          H110.      7.      6445.    1112
          1680.      8.2.    6211.      1109
          Unique.  3.9.    4688.      1116
          Re7.        8.3.    6328.      1115
          Bluedot.  5.        5859.    1113
          Hs6.        4.5.    4922.    1101
          I4198.      7.9.    6211.    1116
          H4198.    8.1.    6094.      1107
          Herco.    4.1.    4922.      1113

          I also redid those first three as I was reading the pressure off of a minimized window

          Lil Gun.  6.6.  6328.      1112
          H322.      9.4.  6211.        1108
          I4955.    13.2.  6094.      1107

          So looks like Lil Gun and 110 are the highest pressures at 7″ although this enduron stuff might make up in volume what  it lacks in pressure

          #505968
          lloydsmale
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            do you know if the 8k to run the action is an @ or a minimum? I wonder too what a reduced power wolf buffer spring would do to help? Id be careful with lil gun. Its a very unstable powder at top end pressures. It goes from mild to wild with just a 1/2 grain increase and id worry that it might not work well at lower pressures either. I would have to say that to start with powders like 1680, re7, and 4198 show me the most potential according to your chart. there close and it takes more of it to go higher which would mean that although were not getting much more pressure we would get more gas due to the fact theres more powder being burned. Just wild uneducated guess though. I do sure hope that if someone else finds the secret recipe he shares it instead of starting an ammo company ::) Keep in mind too that this bullet will be long!! Lots of resistance down the barrel. Add to that powder coating actually raises pressures slightly because it isn’t as slick as lubed lead or a jacketed bullet. At least the guys in the pc section of cast bullets have told me so. Keep in mind too were only about 150 psi short and that isn’t much in a rifle case. I guess I will start with your data. Pc the bullets, cast them out of something soft (heavy) and use the lee factory crimp die to put a good firm crimp on them to get the pressure peaking quicker in the  barrel. That and probably will tray a  lighter buffer spring or even clipping a coil of a standard one.

            #505969
            Full.Lead.Taco
            Keymaster
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              What if we do it backwards from traditional thinking subs and go with a really slow powder?  Maybe like:

              14-16 gr H4831
              16.5 gr Retumbo
              16 gr H1000
              18 gr H50BMG

              Some of the velocity estimations will be off due to the long bearing surface and the powder coating.  Whether that makes it faster or slower, I am not sure–but testing will be the only way to know.

              #505970
              lloydsmale
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                ive thought that way too but was thinking on something a bit faster burning then the extream ones. Ive got some ball wc852 which has been kind of a dud powder for me finding accuracy. Its a surplus ball powder thats suppose to have a burning rate close to 4350/4831. closest commercial powder would be h414. Ive even thought of trying dulex loads with a slow powder using a grain or two of bullseye to light it off better but bottom line is if I can load it progressively I wouldn’t fool with it. Might just have to save my pennys and buy one of those ruger ranch americans.

                #505971
                AlvinYork
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                  Id be careful with lil gun. Its a very unstable powder at top end pressures. It goes from mild to wild with just a 1/2 grain increase

                  That’s what makes it so much fun! Seriously, I pretty much just use it for the sub 300 blk and not much else. So I’ve got that down pretty good.

                  When I get a chance I’ll plug these in and see what we get.

                  14-16 gr H4831
                  16.5 gr Retumbo
                  16 gr H1000
                  18 gr H50BMG

                  #505972
                  Full.Lead.Taco
                  Keymaster
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                    just gotta be careful with too much air space with those magnum pistol powders, like h110, lilgun, etc…

                    #505938
                    AlvinYork
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                      Here ya go fellas. Hot off the press!

                        My empirical testing (charge and try, that is) using my ProChrono chronograph and
                      the values I got from Quickload is what led me to think 8k psi was the threshold to cycle an AR.
                      It is, for my gun. I’m not sure it would be for every gun but I would bet it’s in the ballpark.

                      I used another feature of Quickload that’ll give you incremental charges before and
                      after your target charge. The Step% column tells you where you are as far as charge
                      goes.
                      I used the largest NOE 223 Remington in the NOE bullet file, then altered the characteristics
                      by hand in the screen. So the bullet was 100g, 1 inch long. The “Bullet :” line is the
                      bullet I started with.
                        This only shows psi max and psi @ muzzle. I went ahead and did the pressure at 7 inches
                      like I was before for the target charge. You can sorta extrapolate from there.
                        One thing I noticed was that the percentage of the charge burnt (Prop.Burnt column)
                      from only 1/3 to 1/2 of the charge is burnt. Not too efficient use of the powder, I guess.

                      Cartridge          : .223 Rem. (SAAMI)
                      Bullet            : .224, 75, NOE 224-75-FN(BT)
                      Useable Case Capaci: 23.825 grain H2O = 1.547 cm³
                      Cartridge O.A.L. L6: 2.260 inch = 57.40 mm
                      Barrel Length      : 16.0 inch = 406.4 mm
                      Powder            : Hodgdon H4831

                      Predicted data by increasing and decreasing the given charge,
                      incremented in steps of 2.0% of nominal charge.
                      CAUTION: Figures exceed maximum and minimum recommended loads !

                      Step    Fill. Charge  Vel.  Energy  Pmax  Pmuz  Prop.Burnt B_Time
                      %      %    Grains  fps  ft.lbs    psi    psi      %        ms

                      -20.0  56    12.00    938    195    6349  2542    37.4    2.696
                      -18.0  58    12.30    961    205    6672  2668    38.3    2.638
                      -16.0  59    12.60    983    215    7009  2798    39.3    2.582
                      -14.0  60    12.90  1006    225    7362  2932    40.2    2.528
                      -12.0  62    13.20  1029    235    7730  3071    41.2    2.475
                      -10.0  63    13.50  1053    246    8114  3214    42.2    2.423
                      -08.0  65    13.80  1076    257    8516  3361    43.2    2.372
                      -06.0  66    14.10  1101    269    8935  3513    44.2    2.323
                      -04.0  67    14.40  1125    281    9373  3669    45.2    2.275
                      -02.0  69    14.70  1150    293    9831  3831    46.3    2.227
                      +00.0  70    15.00  1175    306  10308  3997    47.4    2.181 6797@7″
                      +02.0  72    15.30  1200    320  10807  4168    48.5    2.135
                      +04.0  73    15.60  1225    333  11328  4342    49.6    2.091
                      +06.0  74    15.90  1250    347  11871  4519    50.7    2.047
                      +08.0  76    16.20  1276    362  12440  4700    51.8    1.998
                      +10.0  77    16.50  1302    376  13032  4884    52.9    1.952

                      Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
                      Data for burning rate increased by 10% relative to nominal value:
                      +Ba    70    15.00  1279    363  12203  4799    56.7    2.014
                      Data for burning rate decreased by 10% relative to nominal value:
                      -Ba    70    15.00  1067    253    8602  3238    38.6    2.360

                      Cartridge          : .223 Rem. (SAAMI)
                      Bullet            : .224, 75, NOE 224-75-FN(BT)
                      Useable Case Capaci: 23.825 grain H2O = 1.547 cm³
                      Cartridge O.A.L. L6: 2.260 inch = 57.40 mm
                      Barrel Length      : 16.0 inch = 406.4 mm
                      Powder            : Hodgdon Retumbo

                      Predicted data by increasing and decreasing the given charge,
                      incremented in steps of 2.0% of nominal charge.
                      CAUTION: Figures exceed maximum and minimum recommended loads !

                      Step    Fill. Charge  Vel.  Energy  Pmax  Pmuz  Prop.Burnt B_Time
                      %      %    Grains  fps  ft.lbs    psi    psi      %        ms

                      -20.0  62    13.60    852    161    5308  2102    28.8    2.893
                      -18.0  63    13.94    872    169    5574  2208    29.5    2.834
                      -16.0  65    14.28    893    177    5854  2319    30.2    2.777
                      -14.0  66    14.62    914    185    6147  2433    31.0    2.720
                      -12.0  68    14.96    935    194    6454  2552    31.8    2.665
                      -10.0  69    15.30    956    203    6776  2675    32.6    2.612
                      -08.0  71    15.64    978    212    7114  2802    33.4    2.559
                      -06.0  72    15.98  1000    222    7468  2934    34.3    2.507
                      -04.0  74    16.32  1023    232    7837  3071    35.1    2.456
                      -02.0  75    16.66  1046    243    8228  3213    36.0    2.408
                      +00.0  77    17.00  1069    254    8636  3359    37.0    2.359 5742@7″
                      +02.0  79    17.34  1093    265    9064  3511    37.9    2.311
                      +04.0  80    17.68  1117    277    9513  3668    38.9    2.264
                      +06.0  82    18.02  1142    290    9984  3831    39.9    2.218
                      +08.0  83    18.36  1167    302  10478  3999    40.9    2.173
                      +10.0  85    18.70  1192    316  10996  4173    41.9    2.128

                      Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
                      Data for burning rate increased by 10% relative to nominal value:
                      +Ba    77    17.00  1176    307  10261  4171    45.6    2.188
                      Data for burning rate decreased by 10% relative to nominal value:
                      -Ba    77    17.00    967    208    7198  2671    29.6    2.551

                      Cartridge          : .223 Rem. (SAAMI)
                      Bullet            : .224, 75, NOE 224-75-FN(BT)
                      Useable Case Capaci: 23.825 grain H2O = 1.547 cm³
                      Cartridge O.A.L. L6: 2.260 inch = 57.40 mm
                      Barrel Length      : 16.0 inch = 406.4 mm
                      Powder            : Hodgdon H1000

                      Predicted data by increasing and decreasing the given charge,
                      incremented in steps of 2.0% of nominal charge.
                      CAUTION: Figures exceed maximum and minimum recommended loads !

                      Step    Fill. Charge  Vel.  Energy  Pmax  Pmuz  Prop.Burnt B_Time
                      %      %    Grains  fps  ft.lbs    psi    psi      %        ms

                      -20.0  59    12.80    860    164    5476  2090    30.2    2.860
                      -18.0  60    13.12    880    172    5751  2194    30.9    2.801
                      -16.0  62    13.44    901    180    6040  2301    31.6    2.744
                      -14.0  63    13.76    922    189    6343  2412    32.4    2.688
                      -12.0  65    14.08    943    197    6659  2526    33.2    2.633
                      -10.0  66    14.40    964    207    6991  2645    34.0    2.579
                      -08.0  68    14.72    986    216    7339  2767    34.8    2.526
                      -06.0  69    15.04  1008    226    7703  2893    35.7    2.475
                      -04.0  71    15.36  1031    236    8084  3024    36.5    2.424
                      -02.0  72    15.68  1054    247    8484  3158    37.4    2.375
                      +00.0  74    16.00  1077    257    8903  3297    38.3    2.326 5625@7″
                      +02.0  75    16.32  1100    269    9341  3441    39.2    2.279
                      +04.0  77    16.64  1124    281    9801  3589    40.2    2.232
                      +06.0  78    16.96  1148    293  10283  3742    41.1    2.186
                      +08.0  80    17.28  1173    306  10788  3899    42.1    2.141
                      +10.0  81    17.60  1198    319  11318  4062    43.1    2.096

                      Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
                      Data for burning rate increased by 10% relative to nominal value:
                      +Ba    74    16.00  1179    309  10531  4037    46.6    2.160
                      Data for burning rate decreased by 10% relative to nominal value:
                      -Ba    74    16.00    977    212    7444  2655    31.0    2.514

                      Cartridge          : .223 Rem. (SAAMI)
                      Bullet            : .224, 75, NOE 224-75-FN(BT)
                      Useable Case Capaci: 23.825 grain H2O = 1.547 cm³
                      Cartridge O.A.L. L6: 2.260 inch = 57.40 mm
                      Barrel Length      : 16.0 inch = 406.4 mm
                      Powder            : Hodgdon 50BMG

                      Predicted data by increasing and decreasing the given charge,
                      incremented in steps of 2.0% of nominal charge.
                      CAUTION: Figures exceed maximum and minimum recommended loads !

                      Step    Fill. Charge  Vel.  Energy  Pmax  Pmuz  Prop.Burnt B_Time
                      %      %    Grains  fps  ft.lbs    psi    psi      %        ms

                      -20.0  65    14.40    816    148    5029  1872    22.2    2.948
                      -18.0  66    14.76    835    155    5286  1967    22.7    2.889
                      -16.0  68    15.12    855    162    5556  2065    23.3    2.830
                      -14.0  69    15.48    875    170    5838  2166    23.9    2.773
                      -12.0  71    15.84    895    178    6136  2272    24.5    2.717
                      -10.0  73    16.20    916    186    6450  2381    25.1    2.662
                      -08.0  74    16.56    937    195    6781  2495    25.8    2.607
                      -06.0  76    16.92    959    204    7132  2613    26.4    2.554
                      -04.0  77    17.28    981    214    7495  2735    27.1    2.501
                      -02.0  79    17.64  1003    224    7881  2861    27.8    2.450
                      +00.0  81    18.00  1026    234    8290  2992    28.5    2.399 5273@7″f
                      +02.0  82    18.36  1049    245    8719  3128    29.3    2.349
                      +04.0  84    18.72  1073    256    9170  3269    30.0    2.300
                      +06.0  86    19.08  1097    267    9645  3414    30.8    2.275
                      +08.0  87    19.44  1122    280  10148  3565    31.6    2.222
                      +10.0  89    19.80  1147    292  10677  3722    32.4    2.170

                      Results caused by ± 10% powder lot-to-lot burning rate variation using nominal charge
                      Data for burning rate increased by 10% relative to nominal value:
                      +Ba    81    18.00  1128    282    9831  3711    35.1    2.229
                      Data for burning rate decreased by 10% relative to nominal value:
                      -Ba    81    18.00    928    191    6923  2381    22.9    2.645

                      #505973
                      Full.Lead.Taco
                      Keymaster
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                        I think, although inefficient with % powder burn, a slow powder is going to be the ticket.  What about something totally different, like using a blackhorn209 powder?

                        #505974
                        lloydsmale
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                          I’m a bit slow and your charts are a bit confusing but it looks like to me all of these slow powders make the 8k pressure subsonic? Am I looking at them right?

                          #505975
                          Full.Lead.Taco
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                            yes, but they are very inefficient with % powder burned.  I think it will work, not sure how messy it will be.

                            #505976
                            lloydsmale
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                              I think it may be a problem too but at least its there. even if a guy has to clean his gun every couple hundred rounds. Id definitely try a mag primer with them to get them burning better. Hope you guys don’t mind me copying and emailing myself this data. 

                              yes, but they are very inefficient with % powder burned.  I think it will work, not sure how messy it will be.

                              #505977
                              Full.Lead.Taco
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                                Experimental data, feel free to try, use at your own risk…

                                #505978
                                AlvinYork
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                                  Hey Lloyd smale
                                      There are two pressures for most of the postings : max chamber pressure, which occurs usually within the first 4 inches of bullet travel and muzzle pressure. What we’re after here is the pressure at 7 inches. That’s where the carbine gas port is drilled into the barrel, as you know, so, yes, the pressures look good but you’re probably looking at the max psi. That means a pistol gas system, 4 inches, should work fine. In order to get the psi at the 7 inches I have to make Quickload draw a graph and then I mouse over it at 7 inches to get the pressure. I did that for the target charge and added it to that row in the data but it didn’t format too well. Looking at it the H4831 has the best potential with 6797 psi @ 7 inches. Using a magnum primer is a great idea to help burn more of the powder but that may change the pressure,  as you said, “from mild to wild”
                                    As cornmastah stated , these numbers are for entertainment purposes only. Just like I decorate my Christmas tree with 80% AR receivers. . . I mean, gosh, what else would you do with em?

                                  #505979
                                  AlvinYork
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                                    cornmastah,
                                      Quickload doesn’t seem to have Blackhorn powder. I googled it but I couldn’t find any custom file out there.  I guess that’ll have to be a burn and learn exercise.

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