6mm Quick Load

George Foster · Nov 15, 2015

I was wondering if someone would be able to me quick load data for the following.
Thank You in advance.

6mm Ruger 77
Win 760 powder
22" barrel
Rem case
Fed210M primer
75HP Sierra
2.890COL

DrMike · Nov 15, 2015

Code:

Cartridge          : 6 mm Rem.  (SAAMI)
Bullet             : .243, 75, Sierra HP 1510
Useable Case Capaci: 52.665 grain H2O = 3.419 cm³
Cartridge O.A.L. L6: 2.890 inch = 73.41 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : Winchester 760

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   78    40.00   2808    1313   32160  10625     85.5    1.261
-18.0   80    41.00   2881    1382   34432  11000     87.1    1.228
-16.0   82    42.00   2954    1453   36865  11366     88.6    1.196
-14.0   84    43.00   3028    1527   39473  11722     90.0    1.158
-12.0   86    44.00   3102    1603   42273  12065     91.3    1.122
-10.0   88    45.00   3176    1680   45266  12395     92.5    1.086
-08.0   90    46.00   3251    1760   48441  12710     93.7    1.052
-06.0   92    47.00   3325    1841   51830  13008     94.8    1.020
-04.0   93    48.00   3400    1925   55460  13287     95.8    0.988  ! Near Maximum !
-02.0   95    49.00   3474    2010   59347  13546     96.7    0.958  ! Near Maximum !
+00.0   97    50.00   3548    2097   63514  13784     97.5    0.929  ! Near Maximum !
+02.0   99    51.00   3622    2185   67983  13999     98.1    0.901  !DANGEROUS LOAD-DO NOT USE!
+04.0  101    52.00   3696    2275   72783  14189     98.7    0.873  !DANGEROUS LOAD-DO NOT USE!
+06.0  103    53.00   3770    2367   77942  14353     99.2    0.847  !DANGEROUS LOAD-DO NOT USE!
+08.0  105    54.00   3843    2460   83493  14490     99.6    0.822  !DANGEROUS LOAD-DO NOT USE!
+10.0  107    55.00   3916    2554   89476  14598     99.8    0.797  !DANGEROUS LOAD-DO NOT USE!

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     97    50.00   3726    2313   76025  13663    100.0    0.858  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     97    50.00   3313    1828   51330  13189     90.7    1.021

George Foster · Nov 15, 2015

Dr. Mike,

Thank You very much, I appreciate it.

George Foster · Nov 15, 2015

Dr. Mike,

Could I bother you once more to run the data with IMR4064 also.

DrMike · Nov 15, 2015

Code:

Cartridge          : 6 mm Rem.  (SAAMI)
Bullet             : .243, 75, Sierra HP 1510
Useable Case Capaci: 52.665 grain H2O = 3.419 cm³
Cartridge O.A.L. L6: 2.890 inch = 73.41 mm
Barrel Length      : 22.0 inch = 558.8 mm
Powder             : IMR 4064

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   78    35.60   2834    1337   34773  10032     93.0    1.223
-18.0   80    36.49   2899    1400   36986  10317     94.0    1.195
-16.0   82    37.38   2964    1463   39326  10591     95.0    1.160
-14.0   83    38.27   3029    1528   41801  10853     95.9    1.127
-12.0   85    39.16   3094    1594   44418  11103     96.7    1.095
-10.0   87    40.05   3158    1661   47185  11339     97.4    1.063
-08.0   89    40.94   3222    1729   50111  11560     98.1    1.034
-06.0   91    41.83   3285    1797   53206  11765     98.6    1.005
-04.0   93    42.72   3348    1867   56479  11954     99.1    0.978  ! Near Maximum !
-02.0   95    43.61   3411    1937   59944  12125     99.4    0.951  ! Near Maximum !
+00.0   97    44.50   3473    2008   63612  12278     99.7    0.926  ! Near Maximum !
+02.0   99    45.39   3534    2080   67496  12412     99.9    0.901  !DANGEROUS LOAD-DO NOT USE!
+04.0  101    46.28   3595    2152   71613  12527    100.0    0.878  !DANGEROUS LOAD-DO NOT USE!
+06.0  103    47.17   3655    2225   75978  12623    100.0    0.855  !DANGEROUS LOAD-DO NOT USE!
+08.0  105    48.06   3715    2298   80610  12714    100.0    0.833  !DANGEROUS LOAD-DO NOT USE!
+10.0  107    48.95   3773    2371   85528  12802    100.0    0.812  !DANGEROUS LOAD-DO NOT USE!

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     97    44.50   3597    2155   73794  11916    100.0    0.866  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     97    44.50   3296    1809   53412  12195     96.1    1.005

I note that the maximum charge for IMR 4064 listed in the Sierra Manual is 41.9 grains. The maximum charge given for W760 is 46.3.