70 grain RDF Load data - Gas gun

andrewctillman · Feb 15, 2017

Has Nosler released any reloading data for the RDF line?

I would like to try the 70 grain .224 in an accurate 20 inch 1:8 AR Ive been shooting at Horse Ridge.

The 77 grain Sierra TMK is only looking like a real world (1000 yards) G7 BC of 0.192 for me. Barley better than the standard SMK OTM.

The G7 of the RDF is almost hard to believe, especially if you can get 69 grain velocity out of it. Anyone reloading for it yet?

pharmseller · Feb 16, 2017

andrewctillman":1qz8r9pl said:
Has Nosler released any reloading data for the RDF line?

I would like to try the 70 grain .224 in an accurate 20 inch 1:8 AR Ive been shooting at Horse Ridge.

The 77 grain Sierra TMK is only looking like a real world (1000 yards) G7 BC of 0.192 for me. Barley better than the standard SMK OTM.

The G7 of the RDF is almost hard to believe, especially if you can get 69 grain velocity out of it. Anyone reloading for it yet?

I was at the Nosler factory two weeks ago. They told me to use the 69 gr 5.56 data.

https://load-data.nosler.com/load-data/556x45-nato/

I loaded a bunch using TAC, because that's what I had. I haven't been to the range yet.

P

andrewctillman · Feb 16, 2017

Thanks very much.

I see the 70 grain RDF is closer in length to the 77 than the 69 is why I asked. 0.90 for 69 grain CC and .980 for 77 CC. RDF is .96 as I recall.

Think I will give W748 a try since I am shooting at long range, velocity is your friend.

Dwh7271 · Feb 16, 2017

Here's the 69 and 77. Maybe split the difference?

Code:

Cartridge          : .223 Rem.
Bullet             : .224, 69, Nosler CC HPBT 17101
Useable Case Capaci: 25.094 grain H2O = 1.629 cm³
Cartridge O.A.L. L6: 2.260 inch = 57.40 mm
Barrel Length      : 20.0 inch = 508.0 mm
Powder             : Winchester 748

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.009% 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

-20.1   80    19.89   2345     843   29541   7060     87.9    1.258
-18.1   82    20.39   2405     886   31588   7293     89.3    1.224
-16.1   84    20.89   2465     931   33786   7519     90.6    1.190
-14.1   86    21.39   2525     977   36142   7736     91.9    1.157
-12.1   88    21.89   2586    1024   38673   7944     93.1    1.122
-10.0   90    22.39   2646    1073   41394   8142     94.2    1.088
-08.0   92    22.89   2707    1123   44321   8327     95.2    1.054
-06.0   94    23.39   2767    1173   47474   8501     96.1    1.022
-04.0   96    23.89   2828    1225   50871   8661     96.9    0.991
-02.0   98    24.39   2888    1278   54514   8807     97.7    0.962  ! Near Maximum !
+00.0  100    24.89   2948    1332   58502   8938     98.3    0.933  ! Near Maximum !
+02.0  102    25.39   3008    1387   62792   9053     98.8    0.905  !DANGEROUS LOAD-DO NOT USE!
+04.0  104    25.89   3068    1442   67440   9151     99.3    0.878  !DANGEROUS LOAD-DO NOT USE!
+06.0  106    26.39   3128    1499   72493   9231     99.6    0.852  !DANGEROUS LOAD-DO NOT USE!
+08.0  108    26.89   3187    1556   77985   9292     99.8    0.827  !DANGEROUS LOAD-DO NOT USE!
+10.0  110    27.39   3246    1614   83969   9335    100.0    0.803  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba    100    24.89   3024    1401   64706   8871     99.7    0.896  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    100    24.89   2859    1253   52736   8878     95.8    0.975

Code:

Cartridge          : .223 Rem.
Bullet             : .224, 77, Nosler CC HPBT 22421
Useable Case Capaci: 24.297 grain H2O = 1.578 cm³
Cartridge O.A.L. L6: 2.260 inch = 57.40 mm
Barrel Length      : 20.0 inch = 508.0 mm
Powder             : Winchester 748

Predicted data by increasing and decreasing the given charge,
incremented in steps of 2.074% 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

-20.7   79    19.11   2255     869   30530   7031     90.4    1.304
-18.7   81    19.61   2314     915   32726   7257     91.7    1.266
-16.6   83    20.11   2373     963   35087   7475     92.9    1.230
-14.5   85    20.61   2431    1011   37623   7682     94.1    1.193
-12.4   88    21.11   2490    1060   40355   7878     95.1    1.155
-10.4   90    21.61   2549    1111   43297   8062     96.1    1.119
-08.3   92    22.11   2608    1163   46466   8233     96.9    1.084
-06.2   94    22.61   2666    1216   49888   8390     97.7    1.050
-04.1   96    23.11   2725    1270   53585   8532     98.3    1.017  ! Near Maximum !
-02.1   98    23.61   2783    1324   57583   8658     98.9    0.986  ! Near Maximum !
+00.0  100    24.11   2841    1380   61914   8766     99.3    0.956  !DANGEROUS LOAD-DO NOT USE!
+02.1  102    24.61   2898    1436   66616   8858     99.6    0.927  !DANGEROUS LOAD-DO NOT USE!
+04.1  104    25.11   2956    1494   71723   8930     99.9    0.899  !DANGEROUS LOAD-DO NOT USE!
+06.2  106    25.61   3013    1552   77254   8984    100.0    0.872  !DANGEROUS LOAD-DO NOT USE!
+08.3  108    26.11   3069    1611   83256   9020    100.0    0.846  !DANGEROUS LOAD-DO NOT USE!
+10.4  110    26.61   3125    1670   89795   9048    100.0    0.821  !DANGEROUS LOAD-DO NOT USE!

Results caused by ± 5% powder lot-to-lot burning rate variation using nominal charge
Data for burning rate increased by 5% relative to nominal value:
+Ba    100    24.11   2907    1445   68440   8617    100.0    0.920  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    100    24.11   2762    1304   55746   8791     97.5    0.998  ! Near Maximum !

DrMike · Feb 16, 2017

Here's the data for a 223 Rem and the 70 grain RDF at 54k psi.

Code:

Cartridge          : .223 Rem. (SAAMI)
Bullet             : .224, 70, Nosler RDF HPBT 53066 G7
Useable Case Capaci: 24.992 grain H2O = 1.623 cm³
Cartridge O.A.L. L6: 2.260 inch = 57.40 mm
Barrel Length      : 22.0 inch = 558.8 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 54000 psi, or 372 MPa
or a maximum loading ratio or filling of 110 %
These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !

Powder type          Filling/Loading Ratio  Charge    Charge   Vel. Prop.Burnt P max  P muzz  B_Time
                                      %     Grains    Gramm   fps     %       psi     psi    ms
---------------------------------  -----------------------------------------------------------------
Alliant Reloder-17                 110.0     26.6     1.72    2929    95.5    52304    8589   1.035  ! Near Maximum !
Elcho 17                           110.0     26.6     1.72    2929    95.5    52304    8589   1.035  ! Near Maximum !
Accurate 4064                      109.0     24.6     1.59    2917    99.6    54000    7795   1.063  ! Near Maximum !
Accurate 2495                      102.9     23.2     1.50    2916   100.0    54000    7529   1.066  ! Near Maximum !
ReloadSwiss RS 60                  110.0     26.6     1.72    2914    96.1    51089    8714   1.045  ! Near Maximum !
Bofors RP3                         108.4     25.2     1.64    2912    97.1    54000    8013   1.044  ! Near Maximum !
Norma 203 old                      108.4     25.2     1.64    2912    97.1    54000    8013   1.044  ! Near Maximum !
Accurate 2520                      100.6     24.4     1.58    2902    98.8    54000    7694   1.047  ! Near Maximum !
Lovex D073.6                       103.0     24.4     1.58    2902    98.8    54000    7694   1.047  ! Near Maximum !
Hodgdon H414                       110.0     26.8     1.74    2899    89.9    54000    8196   1.030  ! Near Maximum !
Winchester 760                     110.0     26.8     1.74    2899    89.9    54000    8196   1.030  ! Near Maximum !
Somchem S355                       110.0     24.8     1.61    2884    96.5    53728    7844   1.048  ! Near Maximum !
Rottweil R903                      110.0     25.1     1.62    2878    96.4    52479    7866   1.058  ! Near Maximum !
Hodgdon H380                       106.7     25.1     1.63    2872    93.5    54000    7877   1.045  ! Near Maximum !
Accurate 2460                       95.6     23.7     1.54    2853    98.2    54000    7411   1.060  ! Near Maximum !
Lovex D073.5                        95.9     23.7     1.54    2853    98.2    54000    7411   1.060  ! Near Maximum !
Rottweil R901                      100.8     22.1     1.43    2850    99.1    54000    7351   1.068  ! Near Maximum !
SNPE Vectan SP 7                   100.4     24.8     1.61    2838    93.3    54000    7566   1.052  ! Near Maximum !
Vihtavuori N550                    110.0     25.9     1.68    2833    92.2    48537    8104   1.080  ! Near Maximum !
PB Clermont PCL 511                110.0     27.0     1.75    2827    89.5    49926    8065   1.067  ! Near Maximum !
IMR 4007 SSC                       107.4     25.1     1.63    2805    89.1    54000    7474   1.054  ! Near Maximum !
Bofors RP7                         110.0     24.9     1.61    2781    88.6    52500    7414   1.067  ! Near Maximum !
Rottweil R907                      110.0     24.9     1.61    2781    88.6    52500    7414   1.067  ! Near Maximum !
Lovex S065                         110.0     24.8     1.61    2752    90.8    49097    7415   1.098  ! Near Maximum !
Norma 204                          110.0     26.2     1.70    2718    83.7    47724    7433   1.095  ! Near Maximum !

Dwh7271 · Feb 16, 2017

Shoot Doc. I ran it at bolt pressure. Good catch and thank you! I'm about half incompetent tonight.

andrewctillman · Feb 16, 2017

Wow, that was fast.

Thanks guys!

556 NATO pressure is measured at neck as I recall and is about 62,000 psi equivilent. So the "gas gun" pressure I asked about is actually higher than the bolt gun which is a SAAMI spec of 55,000 psi measured mid case for the 223 Remington.

This is the reason that 556 NATO pressure ammo is usually 150-200 fps faster than SAAMI 223 ammo.

If you guys could run Quickload for me with 20 inch barrel at 60,000 psi and with the 70 grain measuring 0.965 long I would be grateful!

Excluding powders over 102% capacity is also realistic for me. (Precise OCL and progressive reloader).

DrMike · Feb 16, 2017

Code:

Cartridge          : 5.56 mm NATO - 5.56 x 45 mm
Bullet             : .224, 70, Nosler RDF HPBT 53066 G7
Useable Case Capaci: 24.688 grain H2O = 1.603 cm³
Cartridge O.A.L. L6: 2.260 inch = 57.40 mm
Barrel Length      : 20.0 inch = 508.0 mm

Predicted Data for Indicated Charges of the Following Powders.
Matching Maximum Pressure: 61500 psi, or 424 MPa
or a maximum loading ratio or filling of 110 %
These calculations refer to your specified settings in QuickLOAD 'Cartridge Dimensions' window.
C A U T I O N : any load listed can result in a powder charge that falls below minimum suggested
loads or exceeds maximum suggested loads as presented in current handloading manuals. Understand
that all of the listed powders can be unsuitable for the given combination of cartridge, bullet
and gun. Actual load order can vary, depending upon lot-to-lot powder and component variations.
USE ONLY FOR COMPARISON !

Powder type          Filling/Loading Ratio  Charge    Charge   Vel. Prop.Burnt P max  P muzz  B_Time
                                      %     Grains    Gramm   fps     %       psi     psi    ms
---------------------------------  -----------------------------------------------------------------
Accurate 2495                      107.1     23.9     1.55    2954   100.0    61500    8506   0.951  ! Near Maximum !
Accurate 2520                      104.7     25.1     1.63    2943    99.2    61500    8725   0.934  ! Near Maximum !
Lovex D073.6                       107.1     25.1     1.63    2943    99.2    61500    8725   0.934  ! Near Maximum !
Rottweil R901                      105.5     22.8     1.48    2897    99.4    61500    8379   0.951  ! Near Maximum !
Accurate 2460                       99.6     24.4     1.58    2896    98.6    61500    8428   0.944  ! Near Maximum !
Lovex D073.5                        99.9     24.4     1.58    2896    98.6    61500    8428   0.944  ! Near Maximum !
Hodgdon H380                       110.0     25.6     1.66    2889    93.8    59609    8902   0.944  ! Near Maximum !
SNPE Vectan SP 7                   104.4     25.5     1.65    2882    94.0    61500    8624   0.937  ! Near Maximum !
Bofors RP3                         110.0     25.3     1.64    2878    96.7    56160    8933   0.969  ! Near Maximum !
Norma 203 old                      110.0     25.3     1.64    2878    96.7    56160    8933   0.969  ! Near Maximum !
Accurate 4064                      110.0     24.5     1.59    2864    99.3    54806    8702   0.998  ! Near Maximum !
Winchester 760                     110.0     26.5     1.72    2815    88.3    53235    8950   0.978  ! Near Maximum !
Hodgdon H414                       110.0     26.5     1.72    2815    88.3    53235    8950   0.978  ! Near Maximum !
MR 4007 SSC                       110.0     25.4     1.65    2803    89.1    58231    8397   0.961  ! Near Maximum !

andrewctillman · Feb 17, 2017

Well, it looks like Accurate 2520 and 2460 will be the go to guys.

I am a little bit surprised that Win 748 and CFE223 did not make the list but I guess that's why you use Quickload.

You both provide a really valuable service to forum members.

Thanks very much!