6 ARC QL - 90 gr

F

frankm

Handloader
May 10, 2009
459
58
Would someone mind running a QL for a 6 ARC and 90 gr TGK and 95 gr TMK?

Here’s specifics on latest development / components:
6 ARC - bolt gun (62000 psi max)
22” barrel
2.260” oal on both bullets
Varget powder
CFE 223 powder

Seems like the 90-95 gr bullets offer a pretty good velocity bonus over the heavy 105-108 gr bullets and might make the cartridge a little flatter shooting for 0-300/400 yard hunting and varminting…. At least my thought process.

Thx much in advance for any of you QL guru s help!!
Frank
 
Code: 
Cartridge          : 6 mm ARC
Bullet             : .243, 90, Sierra TGK 4100
Useable Case Capaci: 30.486 grain H2O = 1.979 cm³
Cartridge O.A.L. L6: 2.260 inch = 57.40 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Hodgdon VARGET *T

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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

-10.0   98    26.55   2625    1377   43679   7425     93.4    1.175
-09.0   99    26.85   2654    1407   45131   7514     93.9    1.158
-08.0  100    27.14   2682    1438   46633   7601     94.3    1.141
-07.0  101    27.44   2711    1468   48191   7686     94.8    1.125
-06.0  102    27.73   2739    1500   49801   7770     95.2    1.109
-05.0  103    28.03   2768    1531   51470   7851     95.6    1.093
-04.0  104    28.32   2797    1563   53195   7930     96.0    1.077  ! Near Maximum !
-03.0  105    28.62   2825    1595   54975   8006     96.4    1.062  ! Near Maximum !
-02.0  106    28.91   2854    1627   56813   8080     96.7    1.047  ! Near Maximum !
-01.0  107    29.21   2882    1660   58716   8152     97.0    1.032  ! Near Maximum !
+00.0  109    29.50   2911    1693   60689   8221     97.4    1.017  ! Near Maximum !
+01.0  110    29.80   2939    1727   62735   8287     97.7    1.003  !DANGEROUS LOAD-DO NOT USE!
+02.0  111    30.09   2968    1760   64857   8350     98.0    0.989  !DANGEROUS LOAD-DO NOT USE!
+03.0  112    30.39   2997    1795   67058   8411     98.2    0.975  !DANGEROUS LOAD-DO NOT USE!
+04.0  113    30.68   3025    1829   69343   8469     98.5    0.961  !DANGEROUS LOAD-DO NOT USE!
+05.0  114    30.98   3054    1864   71716   8523     98.7    0.948  !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    109    29.50   2980    1775   66129   8225     99.1    0.981  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    109    29.50   2832    1602   55282   8124     94.8    1.058  ! Near Maximum !
 
Code: 
Cartridge          : 6 mm ARC
Bullet             : .243, 95, Sierra TMK 7295
Useable Case Capaci: 27.584 grain H2O = 1.791 cm³
Cartridge O.A.L. L6: 2.260 inch = 57.40 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Hodgdon VARGET *T

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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

-10.0  100    24.48   2510    1329   43580   6790     93.1    1.213
-09.0  101    24.75   2537    1358   45045   6872     93.6    1.196
-08.0  102    25.02   2565    1388   46563   6952     94.0    1.178
-07.0  103    25.30   2592    1417   48135   7031     94.5    1.161
-06.0  104    25.57   2620    1448   49764   7107     94.9    1.144
-05.0  105    25.84   2647    1478   51453   7182     95.3    1.128
-04.0  106    26.11   2675    1509   53205   7254     95.7    1.111  ! Near Maximum !
-03.0  107    26.38   2702    1540   55009   7324     96.1    1.095  ! Near Maximum !
-02.0  108    26.66   2730    1572   56906   7392     96.4    1.080  ! Near Maximum !
-01.0  109    26.93   2757    1604   58869   7458     96.8    1.064  ! Near Maximum !
+00.0  111    27.20   2785    1636   60900   7521     97.1    1.049  ! Near Maximum !
+01.0  112    27.47   2813    1669   63002   7582     97.4    1.034  !DANGEROUS LOAD-DO NOT USE!
+02.0  113    27.74   2840    1702   65180   7641     97.7    1.020  !DANGEROUS LOAD-DO NOT USE!
+03.0  114    28.02   2868    1735   67442   7697     98.0    1.005  !DANGEROUS LOAD-DO NOT USE!
+04.0  115    28.29   2895    1768   69793   7750     98.3    0.991  !DANGEROUS LOAD-DO NOT USE!
+05.0  116    28.56   2923    1802   72238   7800     98.5    0.977  !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    111    27.20   2852    1716   66451   7529     98.9    1.013  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    111    27.20   2708    1547   55401   7430     94.4    1.091  ! Near Maximum !
 
Code: 
Cartridge          : 6 mm ARC
Bullet             : .243, 95, Sierra TMK 7295
Useable Case Capaci: 27.584 grain H2O = 1.791 cm³
Cartridge O.A.L. L6: 2.260 inch = 57.40 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Hodgdon CFE223 *C

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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

-10.0   97    27.00   2551    1373   42364   7344     91.5    1.215
-09.0   98    27.30   2582    1406   43911   7439     92.1    1.195
-08.0  100    27.60   2613    1440   45524   7532     92.7    1.176
-07.0  101    27.90   2644    1474   47204   7622     93.2    1.157
-06.0  102    28.20   2675    1509   48954   7709     93.8    1.138
-05.0  103    28.50   2706    1545   50781   7794     94.3    1.120
-04.0  104    28.80   2737    1581   52688   7875     94.8    1.102
-03.0  105    29.10   2769    1617   54671   7954     95.3    1.084  ! Near Maximum !
-02.0  106    29.40   2800    1654   56756   8029     95.7    1.067  ! Near Maximum !
-01.0  107    29.70   2832    1692   58932   8101     96.2    1.050  ! Near Maximum !
+00.0  108    30.00   2863    1729   61205   8169     96.6    1.033  ! Near Maximum !
+01.0  109    30.30   2895    1768   63586   8234     97.0    1.016  !DANGEROUS LOAD-DO NOT USE!
+02.0  110    30.60   2927    1807   66077   8295     97.4    1.000  !DANGEROUS LOAD-DO NOT USE!
+03.0  111    30.90   2958    1846   68690   8352     97.7    0.984  !DANGEROUS LOAD-DO NOT USE!
+04.0  113    31.20   2990    1886   71427   8406     98.0    0.968  !DANGEROUS LOAD-DO NOT USE!
+05.0  114    31.50   3022    1926   74301   8455     98.3    0.953  !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    108    30.00   2945    1829   67501   8181     98.7    0.992  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    108    30.00   2770    1618   55314   8043     93.4    1.080  ! Near Maximum !
 
Code: 
Cartridge          : 6 mm ARC
Bullet             : .243, 90, Sierra TGK 4100
Useable Case Capaci: 30.486 grain H2O = 1.979 cm³
Cartridge O.A.L. L6: 2.260 inch = 57.40 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Hodgdon CFE223 *C

Predicted data by increasing and decreasing the given charge,
incremented in steps of 1.0% 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

-10.0   95    29.25   2666    1420   42332   8019     91.9    1.180
-09.0   97    29.58   2698    1455   43851   8123     92.5    1.161
-08.0   98    29.90   2730    1489   45441   8223     93.0    1.142
-07.0   99    30.23   2762    1525   47092   8321     93.6    1.124
-06.0  100    30.55   2795    1561   48811   8416     94.1    1.106
-05.0  101    30.88   2827    1597   50599   8508     94.6    1.088
-04.0  102    31.20   2859    1634   52467   8597     95.1    1.071
-03.0  103    31.53   2892    1671   54412   8682     95.6    1.054  ! Near Maximum !
-02.0  104    31.85   2924    1709   56441   8764     96.1    1.037  ! Near Maximum !
-01.0  105    32.18   2957    1747   58557   8842     96.5    1.021  ! Near Maximum !
+00.0  106    32.50   2989    1786   60769   8916     96.9    1.004  ! Near Maximum !
+01.0  107    32.83   3022    1825   63079   8987     97.3    0.988  !DANGEROUS LOAD-DO NOT USE!
+02.0  108    33.15   3055    1865   65493   9053     97.6    0.972  !DANGEROUS LOAD-DO NOT USE!
+03.0  109    33.48   3087    1905   68018   9116     98.0    0.957  !DANGEROUS LOAD-DO NOT USE!
+04.0  110    33.80   3120    1946   70661   9174     98.3    0.942  !DANGEROUS LOAD-DO NOT USE!
+05.0  111    34.13   3153    1987   73426   9227     98.6    0.927  !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    106    32.50   3073    1888   67047   8925     98.9    0.964  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    106    32.50   2893    1672   54902   8783     93.8    1.050  ! Near Maximum !
 
Fantastic !! Thx Dr Mike, very much appreciated.

QL is predicting there’s quite a bit more velocity available with the lightest weight projectiles.
 
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