257 and 270 Weatherby QL request please

wbyfan1 · Apr 29, 2014

Hey guy's. I just picked up 2#'s of RL-33 at Cabelas and wanted to give it a whirl in my 257 and 270 Weatherby's. Unfortunately, I can't find any meaningful data. Would one of you QL guru's be so kind as to run some data for me on the following inputs? Thank you kindly, in advance.

257 Weatherby
26 in Barrel
115 Nosler Ballistic Tip
CCI-250
3.17 COAL
RL-33 Powder
Weatherby Brass

270 Weatherby
26 in Barrel
130 Hornady SST
F215GM
3.28 COAL
RL-33
Weatherby Brass

DrMike · Apr 29, 2014

Cartridge : .257 Weath. Mag
Bullet : .257, 115, Nosler BalTip 25115
Useable Case Capaci: 76.471 grain H2O = 4.965 cm³
Cartridge O.A.L. L6: 3.170 inch = 80.52 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : Alliant Reloder-33

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 82 63.36 2651 1794 29285 12140 84.2 1.683
-18.0 84 64.94 2730 1903 31535 12636 86.2 1.639
-16.0 86 66.53 2810 2016 33978 13118 88.0 1.595
-14.0 88 68.11 2891 2134 36635 13584 89.8 1.552
-12.0 90 69.70 2973 2257 39525 14030 91.4 1.496
-10.0 92 71.28 3055 2384 42674 14453 93.0 1.443
-08.0 94 72.86 3139 2515 46111 14849 94.4 1.391
-06.0 96 74.45 3222 2651 49865 15214 95.6 1.341
-04.0 98 76.03 3306 2791 53963 15547 96.8 1.293
-02.0 100 77.62 3390 2934 58397 15842 97.7 1.246 ! Near Maximum !
+00.0 102 79.20 3474 3082 63215 16098 98.5 1.201 ! Near Maximum !
+02.0 104 80.78 3558 3232 68465 16311 99.2 1.158 !DANGEROUS LOAD-DO NOT USE!
+04.0 106 82.37 3642 3386 74196 16478 99.6 1.117 !DANGEROUS LOAD-DO NOT USE!
+06.0 108 83.95 3725 3543 80462 16598 99.9 1.076 !DANGEROUS LOAD-DO NOT USE!
+08.0 110 85.54 3808 3703 87330 16666 100.0 1.037 !DANGEROUS LOAD-DO NOT USE!
+10.0 112 87.12 3891 3866 94876 16702 100.0 1.000 !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 102 79.20 3678 3454 79173 15659 100.0 1.091 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 102 79.20 3192 2602 48596 15388 91.0 1.347

Cartridge : .270 Weath. Mag.
Bullet : .277, 130, Hornady SST InterLock 27302
Useable Case Capaci: 75.157 grain H2O = 4.880 cm³
Cartridge O.A.L. L6: 3.295 inch = 83.69 mm
Barrel Length : 26.0 inch = 660.4 mm
Powder : Alliant Reloder-33

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 88 66.80 2583 1925 28183 10664 79.7 1.649
-18.0 90 68.47 2664 2048 30400 11141 81.9 1.600
-16.0 92 70.14 2746 2177 32816 11609 83.9 1.551
-14.0 94 71.81 2830 2312 35459 12065 86.0 1.503
-12.0 97 73.48 2916 2454 38351 12506 87.9 1.451
-10.0 99 75.15 3002 2602 41522 12927 89.7 1.397
-08.0 101 76.82 3090 2756 45005 13326 91.4 1.344
-06.0 103 78.49 3179 2917 48840 13699 93.0 1.293
-04.0 105 80.16 3268 3083 53073 14042 94.4 1.243
-02.0 107 81.83 3359 3256 57754 14351 95.7 1.195 ! Near Maximum !
+00.0 110 83.50 3450 3435 62946 14623 96.8 1.149 ! Near Maximum !
+02.0 112 85.17 3541 3620 68727 14854 97.8 1.104 !DANGEROUS LOAD-DO NOT USE!
+04.0 114 86.84 3633 3810 75178 15041 98.6 1.060 !DANGEROUS LOAD-DO NOT USE!
+06.0 116 88.51 3726 4007 82394 15179 99.3 1.018 !DANGEROUS LOAD-DO NOT USE!
+08.0 118 90.18 3818 4208 90549 15265 99.7 0.977 !DANGEROUS LOAD-DO NOT USE!
+10.0 121 91.85 3911 4415 99717 15296 99.9 0.938 !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 110 83.50 3677 3902 80265 14447 100.0 1.040 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 110 83.50 3146 2858 48898 13688 87.6 1.288