One more request

Bucky5 · Mar 24, 2017

I don't mean to be a PITA, but I could sure use one more Quickload calc.
243, 85 gr Sierra Spitzer, IMR4350, 22 or 24" barrel
As soon as the weather breaks, I'll start chronagraphing my loads and won't bother you guys anymore. TIA, Ben

DrMike · Mar 24, 2017

Code:

Cartridge          : .243 Win.
Bullet             : .243, 85, Sierra SP 1520
Useable Case Capaci: 51.137 grain H2O = 3.320 cm³
Cartridge O.A.L. L6: 2.710 inch = 68.83 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : Hodgdon H4350

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   79    36.40   2599    1275   31753   8469     89.2    1.447
-18.0   81    37.31   2660    1336   33856   8729     90.5    1.410
-16.0   83    38.22   2721    1398   36066   8981     91.7    1.374
-14.0   85    39.13   2782    1461   38395   9225     92.8    1.336
-12.0   87    40.04   2843    1526   40866   9459     93.9    1.298
-10.0   89    40.95   2904    1592   43490   9682     94.9    1.261
-08.0   91    41.86   2965    1659   46277   9894     95.8    1.225
-06.0   93    42.77   3025    1727   49236  10093     96.6    1.191
-04.0   95    43.68   3085    1797   52379  10278     97.3    1.158  ! Near Maximum !
-02.0   97    44.59   3145    1867   55720  10450     98.0    1.127  ! Near Maximum !
+00.0   99    45.50   3205    1938   59271  10606     98.5    1.096  ! Near Maximum !
+02.0  101    46.41   3264    2010   63047  10747     99.0    1.067  !DANGEROUS LOAD-DO NOT USE!
+04.0  103    47.32   3322    2083   67066  10871     99.4    1.038  !DANGEROUS LOAD-DO NOT USE!
+06.0  105    48.23   3380    2157   71346  10978     99.7    1.011  !DANGEROUS LOAD-DO NOT USE!
+08.0  107    49.14   3438    2231   75908  11067     99.9    0.984  !DANGEROUS LOAD-DO NOT USE!
+10.0  109    50.05   3495    2306   80773  11137    100.0    0.958  !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     99    45.50   3338    2103   69384  10407    100.0    1.022  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     99    45.50   3024    1726   49325  10320     93.2    1.192

Bucky5 · Mar 24, 2017

DrMike, Thanks for the quick reply. Like I originally said, I don't mean to be a PITA, but I'd really like to see IMR4350 not H4350. I know they are probably close, but not the same. Ben

DrMike · Mar 24, 2017

Mea Culpa. I mistakenly inserted the wrong field. Try this.

Code:

Cartridge          : .243 Win.
Bullet             : .243, 85, Sierra SP 1520
Useable Case Capaci: 51.137 grain H2O = 3.320 cm³
Cartridge O.A.L. L6: 2.710 inch = 68.83 mm
Barrel Length      : 24.0 inch = 609.6 mm
Powder             : IMR 4350

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   77    36.24   2595    1271   31612   8445     89.3    1.449
-18.0   79    37.15   2656    1331   33697   8704     90.5    1.412
-16.0   81    38.05   2717    1393   35887   8956     91.7    1.377
-14.0   83    38.96   2777    1456   38195   9198     92.9    1.339
-12.0   85    39.86   2838    1520   40645   9431     93.9    1.301
-10.0   87    40.77   2899    1586   43244   9653     94.9    1.264
-08.0   89    41.68   2959    1653   46004   9864     95.8    1.229
-06.0   91    42.58   3019    1720   48933  10063     96.6    1.195
-04.0   93    43.49   3079    1789   52044  10248     97.3    1.162  ! Near Maximum !
-02.0   95    44.39   3139    1859   55348  10419     98.0    1.130  ! Near Maximum !
+00.0   97    45.30   3198    1930   58859  10575     98.5    1.099  ! Near Maximum !
+02.0   99    46.21   3256    2001   62591  10715     99.0    1.070  !DANGEROUS LOAD-DO NOT USE!
+04.0  100    47.11   3315    2074   66561  10839     99.4    1.041  !DANGEROUS LOAD-DO NOT USE!
+06.0  102    48.02   3373    2147   70787  10946     99.7    1.014  !DANGEROUS LOAD-DO NOT USE!
+08.0  104    48.92   3430    2220   75289  11036     99.9    0.987  !DANGEROUS LOAD-DO NOT USE!
+10.0  106    49.83   3487    2295   80088  11106    100.0    0.962  !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    45.30   3331    2094   68884  10375    100.0    1.025  !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba     97    45.30   3018    1719   48997  10291     93.3    1.195

Now you'll want to buy a pound of H4350. :mrgreen: