Here is some QL data to get you started. I would think IMR4895 would work just fine. Great speeds and if it shoots well, it'll be just as good as any other powder.
Cartridge : .35 Whelen
Bullet : .358, 225, Barnes 'TSX' 35824
Useable Case Capaci: 58.702 grain H2O = 3.811 cm�
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 22.0 inch = 558.8 mm
Powder : IMR 4895
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 85 46.00 2180 2375 32594 6687 90.4 1.393
-18.0 87 47.15 2233 2492 34800 6890 91.6 1.355
-16.0 89 48.30 2286 2611 37143 7086 92.6 1.318
-14.0 91 49.45 2339 2734 39625 7276 93.6 1.282
-12.0 94 50.60 2393 2860 42263 7458 94.6 1.247
-10.0 96 51.75 2446 2988 45084 7632 95.5 1.213
-08.0 98 52.90 2499 3120 48106 7797 96.3 1.178
-06.0 100 54.05 2552 3254 51343 7952 97.0 1.143
-04.0 102 55.20 2605 3390 54814 8096 97.6 1.110
-02.0 104 56.35 2658 3529 58539 8230 98.2 1.079 ! Near Maximum !
+00.0 106 57.50 2711 3671 62540 8351 98.7 1.048 ! Near Maximum !
+02.0 108 58.65 2763 3815 66843 8460 99.1 1.018 !DANGEROUS LOAD-DO NOT USE!
+04.0 111 59.80 2816 3961 71477 8556 99.4 0.990 !DANGEROUS LOAD-DO NOT USE!
+06.0 113 60.95 2868 4110 76474 8639 99.7 0.962 !DANGEROUS LOAD-DO NOT USE!
+08.0 115 62.10 2920 4261 81872 8707 99.9 0.935 !DANGEROUS LOAD-DO NOT USE!
+10.0 117 63.25 2972 4414 87712 8760 100.0 0.909 !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 106 57.50 2827 3993 74946 8090 100.0 0.975 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 106 57.50 2549 3247 50589 8196 93.3 1.144
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 : 22.0 inch = 558.8 mm
Powder : IMR 4895
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 83 45.60 2102 2452 32972 6861 92.9 1.461
-18.0 85 46.74 2152 2570 35178 7057 93.9 1.421
-16.0 87 47.88 2202 2692 37529 7245 94.8 1.380
-14.0 89 49.02 2252 2816 40036 7426 95.7 1.339
-12.0 91 50.16 2302 2942 42709 7597 96.5 1.300
-10.0 93 51.30 2352 3071 45560 7759 97.2 1.262
-08.0 95 52.44 2402 3203 48603 7911 97.8 1.225
-06.0 97 53.58 2451 3336 51850 8052 98.4 1.190
-04.0 99 54.72 2501 3472 55320 8182 98.9 1.157 ! Near Maximum !
-02.0 102 55.86 2550 3609 59029 8300 99.3 1.124 ! Near Maximum !
+00.0 104 57.00 2599 3749 62998 8405 99.6 1.093 ! Near Maximum !
+02.0 106 58.14 2647 3890 67249 8497 99.8 1.063 !DANGEROUS LOAD-DO NOT USE!
+04.0 108 59.28 2696 4034 71807 8576 99.9 1.033 !DANGEROUS LOAD-DO NOT USE!
+06.0 110 60.42 2744 4179 76700 8641 100.0 1.005 !DANGEROUS LOAD-DO NOT USE!
+08.0 112 61.56 2791 4325 81961 8694 100.0 0.978 !DANGEROUS LOAD-DO NOT USE!
+10.0 114 62.70 2839 4474 87625 8744 100.0 0.952 !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 104 57.00 2699 4043 75306 8065 100.0 1.019 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 104 57.00 2455 3345 51074 8387 95.4 1.192
This should give you a place to start out with for your rifle. Good luck, but like many other Whelen, I bet it won't take long to find a good hunting load. I haven't seen many that didn't shoot real well right outta the gates.
