Quick Loads Data

[dezmick]

I have a ?, about the data, i was wondering if anyone could tell me exactly what all the numbers mean starting from left to right. Example


+00.0 86 59.50 3076 3152 62678 11241 100.0 1.151 ! Near Maximum!

is the 2nd number of 86 the % that the cartridge is filled?

 

[DrMike]

dezmick,

The opening data is self-explanatory. In the example that follows, it provides the cartridge, the bullet, the useable case capacity, the cartridge overall length, the barrel length and the powder used.

The chart that follows, after the cautionary statements, gives the percentage from maximum charge. Hence, +0.00 is the maximum charge. The next number is the percentage fill for case capacity. In the instance you cite, the amount is 86 percent of case capacity with 59.50 grains of powder. Next is the velocity in fps (3152), followed by energy in ft. lbs (3152). After this you are given the maximum chamber pressure (62678 psi) and the muzzle pressure (11241 psi). Next, you are provided the proportion of propellant burned (100.0 %) and the barrel time (1.151 milliseconds). There follows any necessary cautionary statements (Near Maximum (pressure) or DANGEROUS LOAD-DO NOT USE.

Cartridge : 7 mm WSM
Bullet : .284, 150, Barnes 'TTSX' BT 28476
Useable Case Capaci: 71.247 grain H2O = 4.626 cm³
Cartridge O.A.L. L6: 2.860 inch = 72.64 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Ramshot Hunter

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 75 50.80 2521 2116 34009 9943 95.5 1.510
-18.0 77 52.07 2579 2215 36208 10210 96.4 1.475
-16.0 79 53.34 2637 2316 38517 10465 97.2 1.441
-14.0 81 54.61 2695 2418 40944 10704 97.9 1.409
-12.0 82 55.88 2752 2522 43512 10929 98.5 1.376
-10.0 84 57.15 2809 2628 46234 11137 99.0 1.340
-08.0 86 58.42 2866 2735 49119 11328 99.4 1.302
-06.0 88 59.69 2922 2844 52178 11500 99.7 1.266
-04.0 90 60.96 2978 2954 55421 11653 99.9 1.231 ! Near Maximum !
-02.0 92 62.23 3033 3065 58861 11787 100.0 1.197 ! Near Maximum !
+00.0 94 63.50 3088 3176 62510 11903 100.0 1.165 ! Near Maximum !
+02.0 96 64.77 3142 3289 66384 12014 100.0 1.133 !DANGEROUS LOAD-DO NOT USE!
+04.0 97 66.04 3196 3402 70499 12122 100.0 1.103 !DANGEROUS LOAD-DO NOT USE!
+06.0 99 67.31 3249 3516 74871 12227 100.0 1.074 !DANGEROUS LOAD-DO NOT USE!
+08.0 101 68.58 3302 3632 79522 12329 100.0 1.046 !DANGEROUS LOAD-DO NOT USE!
+10.0 103 69.85 3355 3748 84472 12427 100.0 1.019 !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 94 63.50 3195 3399 73753 11502 100.0 1.086 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 94 63.50 2929 2858 51348 12093 97.8 1.269

 

[dezmick]

Thanks for your help, i was pretty sure i was right on the numbers, just wanted to check to be positive. Thanks