QL CALC

[Bucky5]

Would someone please run the following QUICKLOAD calc for me. Sierra 85 HPBT, 24" barrel, H4831SC, 2.71. I have an old calc for a 22"" barrel, I'd really like to compare the difference in the two barrel lengths. TIA, Buck

 

[TackDriver284]

What is the caliber?

 

[Bucky5]

Sorry ... 243 Buck

 

[TackDriver284]

Cartridge : .243 Win.
Bullet : .243, 85, Sierra HPBT 1530
Useable Case Capaci: 51.096 grain H2O = 3.318 cm³
Cartridge O.A.L. L6: 2.710 inch = 68.83 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Hodgdon H4831 SC

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    43.20   2834    1516   39690   9728     89.1    1.310
-09.0   92    43.68   2868    1552   41064   9864     89.8    1.290
-08.0   93    44.16   2902    1589   42487   9998     90.5    1.269
-07.0   94    44.64   2935    1626   43965  10130     91.1    1.250
-06.0   95    45.12   2969    1664   45496  10258     91.7    1.230
-05.0   96    45.60   3003    1702   47087  10383     92.3    1.211
-04.0   97    46.08   3037    1741   48738  10505     92.9    1.192
-03.0   98    46.56   3071    1780   50450  10623     93.5    1.174
-02.0   99    47.04   3105    1820   52232  10738     94.0    1.155  ! Near Maximum !
-01.0  100    47.52   3139    1860   54081  10850     94.6    1.137  ! Near Maximum !
+00.0  101    48.00   3173    1901   55999  10957     95.1    1.120  ! Near Maximum !
+01.0  102    48.48   3207    1942   58002  11060     95.6    1.102  ! Near Maximum !
+02.0  103    48.96   3242    1983   60082  11159     96.0    1.085  !DANGEROUS LOAD-DO NOT USE!
+03.0  104    49.44   3276    2025   62244  11254     96.5    1.069  !DANGEROUS LOAD-DO NOT USE!
+04.0  105    49.92   3310    2068   64496  11344     96.9    1.052  !DANGEROUS LOAD-DO NOT USE!
+05.0  106    50.40   3344    2111   66838  11429     97.3    1.036  !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    101    48.00   3346    2113   67161  11107     99.2    1.035  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    101    48.00   2956    1649   45808  10285     87.2    1.227

Cartridge : .243 Win.
Bullet : .243, 85, Sierra HPBT 1530
Useable Case Capaci: 51.096 grain H2O = 3.318 cm³
Cartridge O.A.L. L6: 2.710 inch = 68.83 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : Hodgdon H4831 SC

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    43.20   2763    1440   39690  10602     87.9    1.251
-09.0   92    43.68   2796    1475   41064  10759     88.6    1.231
-08.0   93    44.16   2829    1511   42487  10913     89.3    1.211
-07.0   94    44.64   2863    1547   43965  11064     90.0    1.192
-06.0   95    45.12   2897    1584   45496  11213     90.6    1.173
-05.0   96    45.60   2930    1621   47087  11358     91.3    1.155
-04.0   97    46.08   2964    1659   48738  11500     91.9    1.136
-03.0   98    46.56   2998    1697   50450  11639     92.5    1.119
-02.0   99    47.04   3032    1735   52232  11773     93.1    1.101  ! Near Maximum !
-01.0  100    47.52   3066    1775   54081  11905     93.6    1.084  ! Near Maximum !
+00.0  101    48.00   3101    1814   55999  12032     94.2    1.067  ! Near Maximum !
+01.0  102    48.48   3135    1855   58002  12155     94.7    1.050  ! Near Maximum !
+02.0  103    48.96   3169    1895   60082  12273     95.2    1.033  !DANGEROUS LOAD-DO NOT USE!
+03.0  104    49.44   3203    1937   62244  12387     95.7    1.017  !DANGEROUS LOAD-DO NOT USE!
+04.0  105    49.92   3238    1979   64496  12496     96.1    1.001  !DANGEROUS LOAD-DO NOT USE!
+05.0  106    50.40   3272    2021   66838  12600     96.6    0.986  !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    101    48.00   3275    2025   67161  12290     98.8    0.985  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba    101    48.00   2883    1569   45808  11213     85.9    1.170

 

[Bucky5]

Thank you, Buck