This should be pretty close to what you're seeing. Not exact, but close. I calibrated it to your 58 gr load
If you go up, check your chrono versus what the table shows it should be. If you're faster, let me know and we can rerun it. (faster means higher pressure than shown on here)
Code:
Cartridge : .25-06 Rem.
Bullet : .257, 100, Barnes 'TTSX'BT 30220
Useable Case Capaci: 59.131 grain H2O = 3.839 cm³
Cartridge O.A.L. L6: 3.166 inch = 80.42 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : Alliant Reloder-26 ?
Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.833% 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
-08.3 94 55.00 3030 2038 41867 12486 96.1 1.261
-07.5 95 55.50 3061 2081 43122 12604 96.6 1.247
-06.7 96 56.00 3093 2125 44422 12717 97.0 1.233
-05.8 96 56.50 3125 2169 45768 12824 97.4 1.219
-05.0 97 57.00 3157 2213 47163 12926 97.8 1.205
-04.2 98 57.50 3189 2258 48609 13022 98.2 1.191
-03.3 99 58.00 3221 2304 50108 13111 98.5 1.176
-02.5 100 58.50 3253 2350 51661 13195 98.8 1.163
-01.7 101 59.00 3285 2396 53274 13272 99.1 1.147
-00.8 102 59.50 3317 2443 54947 13343 99.3 1.131
+00.0 102 60.00 3349 2490 56683 13406 99.5 1.114 ! Near Maximum !
+00.8 103 60.50 3381 2538 58486 13463 99.7 1.098 ! Near Maximum !
+01.7 104 61.00 3413 2586 60357 13513 99.8 1.083 ! Near Maximum !
+02.5 105 61.50 3444 2634 62302 13555 99.9 1.067 ! Near Maximum !
+03.3 106 62.00 3476 2683 64323 13590 100.0 1.052 ! Near Maximum !
+04.2 107 62.50 3508 2732 66425 13617 100.0 1.037 !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 102 60.00 3454 2648 63838 13144 100.0 1.061 ! Near Maximum !
Data for burning rate decreased by 5% relative to nominal value:
-Ba 102 60.00 3223 2307 50320 13375 97.1 1.173
Awesome thank you for doing that. I think what I'll do first is shoot a book load, an if I'm low on velocity on that too, I'm going to send my chrono into the manufacturer to get checked out. If I match, I'll run with your data.
