My best load in my 7600 IMR 4320 with Speer 250 gr bullets work up to max load. Or RL 15. Look for similar burn rates on above powders. Never saw a Whelen that did not do well with similar powders.
Never realized 4320 was so close to RL15. That looks to be promising for the Whelen. Never thought of trying it. Might have to grab a can if I ever find any around.
Cartridge : .35 Whelen
Bullet : .358, 250, Nosler PART SP 44801
Useable Case Capaci: 59.664 grain H2O = 3.874 cm�
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 24.0 inch = 609.6 mm
Powder : IMR 4320
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 94 51.13 2340 3040 43807 6596 97.0 1.341
-09.0 96 51.70 2365 3104 45244 6662 97.3 1.322
-08.0 97 52.27 2389 3169 46725 6725 97.7 1.303
-07.0 98 52.83 2414 3234 48258 6786 98.0 1.285
-06.0 99 53.40 2438 3300 49844 6845 98.2 1.267
-05.0 100 53.97 2462 3366 51487 6901 98.5 1.249
-04.0 101 54.54 2487 3432 53185 6954 98.7 1.231
-03.0 102 55.11 2511 3500 54949 7005 98.9 1.214
-02.0 103 55.67 2535 3567 56771 7053 99.1 1.198 ! Near Maximum !
-01.0 104 56.24 2559 3636 58664 7099 99.3 1.181 ! Near Maximum !
+00.0 105 56.81 2583 3705 60623 7141 99.5 1.165 ! Near Maximum !
+01.0 106 57.38 2607 3774 62655 7181 99.6 1.149 ! Near Maximum !
+02.0 107 57.95 2631 3844 64762 7218 99.7 1.133 !DANGEROUS LOAD-DO NOT USE!
+03.0 108 58.51 2655 3914 66950 7252 99.8 1.118 !DANGEROUS LOAD-DO NOT USE!
+04.0 109 59.08 2679 3984 69221 7283 99.9 1.102 !DANGEROUS LOAD-DO NOT USE!
+05.0 110 59.65 2703 4056 71579 7311 100.0 1.088 !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 105 56.81 2680 3988 72233 6851 100.0 1.091 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 105 56.81 2444 3316 50064 7114 95.2 1.262
