QL request 7-08

[frankm]

Ordered a new Howa Superlite with 20” barrel in 7-08. Since it’s a 9.5” twist, and will be 5.5-5.75 pds with scope thinking I ll use 120 and 139/140 gr bullets to help offset some recoil.

Dr Mike or one of you fine fellas, would you mind running some QL s for me with 120 prohunter and 139 Hor btsp. Probably use 2.80” oal as I don’t have rifle yet as it’s in transit. Powders would be H4895, Varget, N550 and H380. I realize this would be 8 total projections so expecting it to take a little while for the “volunteer” to get through all this AND I really do appreciate the help.

Hoping I can get a comfortable 2850-2900 fps with the 120 and 2700-2750 fps with the 139 along with moa or better? accuracy!!

Thx Gentlemen.

 

[DrMike]

Cartridge          : 7 mm-08 Rem.
Bullet             : .284, 120, Sierra SP 1900
Useable Case Capaci: 52.837 grain H2O = 3.431 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length      : 20.0 inch = 508.0 mm
Powder             : Vihtavuori N550 *C*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   95    47.16   2723    1975   41991  11063     92.4    1.111
-09.0   96    47.68   2755    2023   43477  11211     93.0    1.093
-08.0   97    48.21   2788    2071   45011  11356     93.6    1.075
-07.0   98    48.73   2821    2120   46594  11496     94.1    1.058
-06.0   99    49.26   2854    2170   48229  11633     94.6    1.041
-05.0  100    49.78   2887    2220   49921  11767     95.1    1.024
-04.0  101    50.30   2919    2271   51676  11896     95.6    1.008  ! Near Maximum !
-03.0  102    50.83   2952    2323   53496  12022     96.1    0.992  ! Near Maximum !
-02.0  103    51.35   2985    2375   55384  12143     96.5    0.976  ! Near Maximum !
-01.0  104    51.88   3018    2427   57343  12259     96.9    0.961  ! Near Maximum !
+00.0  105    52.40   3051    2481   59377  12370     97.3    0.946  ! Near Maximum !
+01.0  106    52.92   3084    2535   61488  12477     97.6    0.931  !DANGEROUS LOAD-DO NOT USE!
+02.0  107    53.45   3117    2589   63681  12579     98.0    0.916  !DANGEROUS LOAD-DO NOT USE!
+03.0  108    53.97   3150    2644   65960  12675     98.3    0.902  !DANGEROUS LOAD-DO NOT USE!
+04.0  109    54.50   3183    2700   68328  12767     98.6    0.888  !DANGEROUS LOAD-DO NOT USE!
+05.0  111    55.02   3216    2756   70790  12852     98.8    0.874  !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    105    52.40   3137    2623   65582  12400     99.1    0.906  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    105    52.40   2952    2322   53288  12174     94.3    0.991  ! Near Maximum !

 

[DrMike]

Cartridge          : 7 mm-08 Rem.
Bullet             : .284, 120, Sierra SP 1900
Useable Case Capaci: 52.837 grain H2O = 3.431 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length      : 20.0 inch = 508.0 mm
Powder             : Hodgdon H4895

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   85    41.40   2715    1963   43547  10438     95.9    1.100
-09.0   86    41.86   2743    2005   44876  10555     96.3    1.084
-08.0   87    42.32   2772    2047   46243  10670     96.7    1.068
-07.0   88    42.78   2800    2089   47650  10781     97.1    1.053
-06.0   89    43.24   2828    2132   49097  10890     97.4    1.038
-05.0   90    43.70   2857    2175   50586  10995     97.7    1.024
-04.0   91    44.16   2885    2218   52118  11096     98.0    1.010  ! Near Maximum !
-03.0   92    44.62   2913    2261   53695  11195     98.3    0.996  ! Near Maximum !
-02.0   93    45.08   2941    2305   55318  11289     98.5    0.982  ! Near Maximum !
-01.0   93    45.54   2969    2349   56989  11381     98.8    0.969  ! Near Maximum !
+00.0   94    46.00   2997    2394   58709  11468     99.0    0.955  ! Near Maximum !
+01.0   95    46.46   3025    2439   60479  11551     99.2    0.942  !DANGEROUS LOAD-DO NOT USE!
+02.0   96    46.92   3053    2484   62303  11631     99.3    0.930  !DANGEROUS LOAD-DO NOT USE!
+03.0   97    47.38   3081    2529   64180  11707     99.5    0.917  !DANGEROUS LOAD-DO NOT USE!
+04.0   98    47.84   3108    2575   66115  11779     99.6    0.905  !DANGEROUS LOAD-DO NOT USE!
+05.0   99    48.30   3136    2621   68107  11846     99.7    0.893  !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     94    46.00   3065    2503   63865  11376     99.9    0.920  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba     94    46.00   2918    2269   53590  11422     97.0    0.996  ! Near Maximum !

 

[DrMike]

Cartridge          : 7 mm-08 Rem.
Bullet             : .284, 120, Sierra SP 1900
Useable Case Capaci: 52.837 grain H2O = 3.431 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length      : 20.0 inch = 508.0 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   91    42.66   2688    1925   43582  10124     94.3    1.087
-09.0   92    43.13   2716    1966   44933  10247     94.8    1.072
-08.0   93    43.61   2745    2008   46325  10368     95.2    1.056
-07.0   94    44.08   2774    2050   47760  10486     95.6    1.041
-06.0   95    44.56   2803    2093   49239  10601     96.0    1.027
-05.0   96    45.03   2831    2136   50763  10713     96.4    1.012
-04.0   97    45.50   2860    2180   52335  10823     96.8    0.998  ! Near Maximum !
-03.0   98    45.98   2889    2223   53956  10929     97.1    0.984  ! Near Maximum !
-02.0   99    46.45   2917    2268   55627  11033     97.4    0.970  ! Near Maximum !
-01.0  100    46.93   2946    2312   57350  11133     97.7    0.957  ! Near Maximum !
+00.0  101    47.40   2974    2357   59129  11230     98.0    0.944  ! Near Maximum !
+01.0  102    47.87   3003    2403   60963  11323     98.3    0.931  !DANGEROUS LOAD-DO NOT USE!
+02.0  103    48.35   3032    2449   62856  11413     98.5    0.918  !DANGEROUS LOAD-DO NOT USE!
+03.0  104    48.82   3060    2495   64810  11499     98.8    0.905  !DANGEROUS LOAD-DO NOT USE!
+04.0  105    49.30   3088    2541   66828  11581     99.0    0.893  !DANGEROUS LOAD-DO NOT USE!
+05.0  106    49.77   3117    2588   68911  11659     99.2    0.881  !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    101    47.40   3043    2468   64124  11227     99.5    0.910  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    101    47.40   2895    2234   54184  11107     95.7    0.982  ! Near Maximum !

 

[DrMike]

Cartridge          : 7 mm-08 Rem.
Bullet             : .284, 120, Sierra SP 1900
Useable Case Capaci: 52.837 grain H2O = 3.431 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length      : 20.0 inch = 508.0 mm
Powder             : Hodgdon H380

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   89    44.46   2678    1911   42173  10465     92.3    1.120
-09.0   90    44.95   2709    1956   43583  10601     92.8    1.103
-08.0   91    45.45   2740    2001   45040  10735     93.3    1.086
-07.0   92    45.94   2771    2047   46547  10866     93.8    1.069
-06.0   93    46.44   2803    2093   48107  10994     94.3    1.052
-05.0   94    46.93   2834    2140   49720  11119     94.8    1.036
-04.0   95    47.42   2865    2187   51390  11241     95.3    1.020  ! Near Maximum !
-03.0   96    47.92   2896    2235   53119  11359     95.7    1.004  ! Near Maximum !
-02.0   97    48.41   2928    2284   54908  11474     96.1    0.989  ! Near Maximum !
-01.0   98    48.91   2959    2333   56761  11585     96.5    0.974  ! Near Maximum !
+00.0   99    49.40   2990    2383   58681  11692     96.9    0.959  ! Near Maximum !
+01.0  100    49.89   3022    2433   60670  11795     97.2    0.944  !DANGEROUS LOAD-DO NOT USE!
+02.0  101    50.39   3053    2483   62731  11894     97.6    0.930  !DANGEROUS LOAD-DO NOT USE!
+03.0  102    50.88   3084    2535   64867  11989     97.9    0.916  !DANGEROUS LOAD-DO NOT USE!
+04.0  103    51.38   3116    2586   67083  12079     98.2    0.902  !DANGEROUS LOAD-DO NOT USE!
+05.0  104    51.87   3147    2639   69382  12165     98.5    0.888  !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     99    49.40   3071    2513   64336  11739     98.8    0.920  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba     99    49.40   2898    2238   53118  11504     94.0    1.003  ! Near Maximum !

 

[DrMike]

Cartridge          : 7 mm-08 Rem.
Bullet             : .284, 120, Sierra SP 1900
Useable Case Capaci: 52.837 grain H2O = 3.431 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length      : 20.0 inch = 508.0 mm
Powder             : Hodgdon H380

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   89    44.46   2678    1911   42173  10465     92.3    1.120
-09.0   90    44.95   2709    1956   43583  10601     92.8    1.103
-08.0   91    45.45   2740    2001   45040  10735     93.3    1.086
-07.0   92    45.94   2771    2047   46547  10866     93.8    1.069
-06.0   93    46.44   2803    2093   48107  10994     94.3    1.052
-05.0   94    46.93   2834    2140   49720  11119     94.8    1.036
-04.0   95    47.42   2865    2187   51390  11241     95.3    1.020  ! Near Maximum !
-03.0   96    47.92   2896    2235   53119  11359     95.7    1.004  ! Near Maximum !
-02.0   97    48.41   2928    2284   54908  11474     96.1    0.989  ! Near Maximum !
-01.0   98    48.91   2959    2333   56761  11585     96.5    0.974  ! Near Maximum !
+00.0   99    49.40   2990    2383   58681  11692     96.9    0.959  ! Near Maximum !
+01.0  100    49.89   3022    2433   60670  11795     97.2    0.944  !DANGEROUS LOAD-DO NOT USE!
+02.0  101    50.39   3053    2483   62731  11894     97.6    0.930  !DANGEROUS LOAD-DO NOT USE!
+03.0  102    50.88   3084    2535   64867  11989     97.9    0.916  !DANGEROUS LOAD-DO NOT USE!
+04.0  103    51.38   3116    2586   67083  12079     98.2    0.902  !DANGEROUS LOAD-DO NOT USE!
+05.0  104    51.87   3147    2639   69382  12165     98.5    0.888  !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     99    49.40   3071    2513   64336  11739     98.8    0.920  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba     99    49.40   2898    2238   53118  11504     94.0    1.003  ! Near Maximum !

 

[DrMike]

Cartridge          : 7 mm-08 Rem.
Bullet             : .284, 139, Hornady BTSP 2825
Useable Case Capaci: 49.412 grain H2O = 3.208 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length      : 20.0 inch = 508.0 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   89    39.42   2505    1936   44003   9597     96.0    1.158
-09.0   90    39.86   2531    1977   45343   9706     96.4    1.141
-08.0   91    40.30   2557    2018   46722   9813     96.7    1.125
-07.0   92    40.73   2583    2059   48143   9917     97.1    1.110
-06.0   93    41.17   2609    2101   49605  10019     97.4    1.095
-05.0   94    41.61   2635    2143   51112  10117     97.7    1.079
-04.0   95    42.05   2661    2185   52663  10213     98.0    1.065  ! Near Maximum !
-03.0   96    42.49   2687    2228   54262  10306     98.2    1.050  ! Near Maximum !
-02.0   97    42.92   2713    2271   55909  10396     98.5    1.036  ! Near Maximum !
-01.0   98    43.36   2738    2314   57606  10482     98.7    1.022  ! Near Maximum !
+00.0   99    43.80   2764    2358   59355  10566     98.9    1.008  ! Near Maximum !
+01.0  100    44.24   2790    2402   61158  10646     99.1    0.994  !DANGEROUS LOAD-DO NOT USE!
+02.0  101    44.68   2815    2447   63017  10722     99.3    0.981  !DANGEROUS LOAD-DO NOT USE!
+03.0  102    45.11   2841    2491   64934  10795     99.4    0.968  !DANGEROUS LOAD-DO NOT USE!
+04.0  103    45.55   2867    2536   66911  10865     99.6    0.955  !DANGEROUS LOAD-DO NOT USE!
+05.0  104    45.99   2892    2581   68950  10931     99.7    0.942  !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     99    43.80   2823    2460   64309  10495     99.9    0.973  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba     99    43.80   2695    2242   54443  10516     97.0    1.047  ! Near Maximum !

 

[DrMike]

Cartridge          : 7 mm-08 Rem.
Bullet             : .284, 139, Hornady BTSP 2825
Useable Case Capaci: 49.412 grain H2O = 3.208 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length      : 20.0 inch = 508.0 mm
Powder             : Hodgdon H4895

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   84    38.25   2530    1976   44092   9847     97.4    1.169
-09.0   85    38.68   2556    2016   45413   9950     97.7    1.152
-08.0   86    39.10   2582    2057   46771  10049     98.0    1.136
-07.0   87    39.53   2607    2098   48166  10145     98.3    1.121
-06.0   88    39.95   2633    2140   49601  10238     98.5    1.105
-05.0   89    40.38   2659    2181   51076  10328     98.8    1.090
-04.0   90    40.80   2684    2223   52593  10415     99.0    1.075  ! Near Maximum !
-03.0   91    41.23   2709    2266   54152  10499     99.2    1.061  ! Near Maximum !
-02.0   91    41.65   2735    2308   55756  10579     99.3    1.046  ! Near Maximum !
-01.0   92    42.08   2760    2351   57405  10655     99.5    1.032  ! Near Maximum !
+00.0   93    42.50   2785    2394   59101  10729     99.6    1.019  ! Near Maximum !
+01.0   94    42.93   2810    2437   60846  10798     99.7    1.005  !DANGEROUS LOAD-DO NOT USE!
+02.0   95    43.35   2835    2481   62642  10864     99.8    0.992  !DANGEROUS LOAD-DO NOT USE!
+03.0   96    43.78   2860    2524   64489  10926     99.9    0.979  !DANGEROUS LOAD-DO NOT USE!
+04.0   97    44.20   2885    2568   66390  10984     99.9    0.966  !DANGEROUS LOAD-DO NOT USE!
+05.0   98    44.63   2909    2612   68347  11038    100.0    0.954  !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     93    42.50   2842    2493   64218  10565    100.0    0.982  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba     93    42.50   2717    2278   54012  10763     98.2    1.061  ! Near Maximum !

 

[DrMike]

Cartridge          : 7 mm-08 Rem.
Bullet             : .284, 139, Hornady BTSP 2825
Useable Case Capaci: 49.412 grain H2O = 3.208 cm³
Cartridge O.A.L. L6: 2.800 inch = 71.12 mm
Barrel Length      : 20.0 inch = 508.0 mm
Powder             : Vihtavuori N550 *C*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   93    43.38   2534    1982   41991  10502     94.2    1.186
-09.0   94    43.86   2564    2029   43423  10633     94.7    1.167
-08.0   95    44.34   2593    2076   44901  10761     95.2    1.149
-07.0   96    44.83   2623    2123   46428  10886     95.6    1.131
-06.0   97    45.31   2652    2171   48010  11007     96.1    1.114
-05.0   98    45.79   2682    2220   49647  11125     96.5    1.096
-04.0   99    46.27   2711    2269   51343  11239     96.9    1.079  ! Near Maximum !
-03.0  100    46.75   2741    2318   53099  11348     97.2    1.063  ! Near Maximum !
-02.0  102    47.24   2770    2369   54918  11454     97.6    1.046  ! Near Maximum !
-01.0  103    47.72   2800    2419   56804  11555     97.9    1.031  ! Near Maximum !
+00.0  104    48.20   2829    2471   58758  11652     98.2    1.015  ! Near Maximum !
+01.0  105    48.68   2859    2522   60783  11745     98.5    0.999  !DANGEROUS LOAD-DO NOT USE!
+02.0  106    49.16   2888    2575   62884  11832     98.8    0.984  !DANGEROUS LOAD-DO NOT USE!
+03.0  107    49.65   2918    2627   65062  11915     99.0    0.969  !DANGEROUS LOAD-DO NOT USE!
+04.0  108    50.13   2947    2680   67323  11993     99.2    0.954  !DANGEROUS LOAD-DO NOT USE!
+05.0  109    50.61   2976    2734   69670  12066     99.4    0.940  !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    104    48.20   2904    2603   64813  11609     99.6    0.973  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 5% relative to nominal value:
-Ba    104    48.20   2742    2321   52823  11536     95.7    1.062  ! Near Maximum !

 

[ReloadKy]

H4895 with 120 gr pills is the easy button for my 7-08!

 

[frankm]

Thank you Dr Mike!! I ll look these over and get a “plan of attack”!!

Much appreciated.

 

[RL338]

N550 looks pretty speedy in the 20” barrel.

 

[wvbuckbuster]

At some point try the Nosler 120gr BT. Also, Ramshot Big Game and Winchester Stabal6.5 powders group well in my 7mm08.

 

[SJB358]

Just so many great combos in the 7-08. One of the easiest cartridges out there in my opinion.

 

[ReloadKy]

At some point try the Nosler 120gr BT. Also, Ramshot Big Game and Winchester Stabal6.5 powders group well in my 7mm08.

The 120 Nosler BT with 43 gr of H4895 has accounted for several deer in my freezer and a couple on the wall!