I have had about 300 of these old gems kicking around my bullet shelf for quite awhile. They used to shoot decent in my old 338 with RL22 so I decided to give them a shot in the Alaskan with RL26 to see what'd they do..
Cartridge : .338 Win Mag.
Bullet : .338, 275, Speer SSP 2411
Useable Case Capaci: 74.098 grain H2O = 4.811 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 25.0 inch = 635.0 mm
Powder : Alliant Reloder-26 *C
Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.658% 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
-06.6 97 71.00 2551 3975 49344 9974 100.0 1.423
-05.9 97 71.50 2570 4032 50572 10001 100.0 1.407
-05.3 98 72.00 2588 4089 51837 10028 100.0 1.391
-04.6 99 72.50 2606 4146 53139 10054 100.0 1.376
-03.9 99 73.00 2624 4203 54466 10079 100.0 1.361
-03.3 100 73.50 2642 4261 55854 10104 100.0 1.346 ! Near Maximum !
-02.6 101 74.00 2659 4319 57272 10129 100.0 1.332 ! Near Maximum !
-02.0 101 74.50 2677 4377 58731 10153 100.0 1.317 ! Near Maximum !
-01.3 102 75.00 2695 4436 60232 10177 100.0 1.303 ! Near Maximum !
-00.7 103 75.50 2713 4494 61780 10200 100.0 1.288 ! Near Maximum !
+00.0 104 76.00 2731 4553 63373 10223 100.0 1.275 ! Near Maximum !
+00.7 104 76.50 2748 4612 65015 10246 100.0 1.261 !DANGEROUS LOAD-DO NOT USE!
+01.3 105 77.00 2766 4672 66708 10268 100.0 1.247 !DANGEROUS LOAD-DO NOT USE!
+02.0 106 77.50 2784 4732 68454 10289 100.0 1.234 !DANGEROUS LOAD-DO NOT USE!
+02.6 106 78.00 2801 4792 70252 10310 100.0 1.220 !DANGEROUS LOAD-DO NOT USE!
+03.3 107 78.50 2819 4852 72105 10330 100.0 1.207 !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 76.00 2834 4906 80375 9768 100.0 1.172 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 104 76.00 2567 4024 48933 10791 99.3 1.414
76
76.5
77
Nothing ground breaking as far as accuracy, but maybe I can work with the seating depth a little with it and see if I can pull them together. Looks like somewhere in the 76.5-77 grain mark will be where I end up. Pretty powerful combo though. I'd love to take that load hunting. Elmer seemed to like them quite alot back in the old days.
Cartridge : .338 Win Mag.
Bullet : .338, 275, Speer SSP 2411
Useable Case Capaci: 74.098 grain H2O = 4.811 cm³
Cartridge O.A.L. L6: 3.340 inch = 84.84 mm
Barrel Length : 25.0 inch = 635.0 mm
Powder : Alliant Reloder-26 *C
Predicted data by increasing and decreasing the given charge,
incremented in steps of 0.658% 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
-06.6 97 71.00 2551 3975 49344 9974 100.0 1.423
-05.9 97 71.50 2570 4032 50572 10001 100.0 1.407
-05.3 98 72.00 2588 4089 51837 10028 100.0 1.391
-04.6 99 72.50 2606 4146 53139 10054 100.0 1.376
-03.9 99 73.00 2624 4203 54466 10079 100.0 1.361
-03.3 100 73.50 2642 4261 55854 10104 100.0 1.346 ! Near Maximum !
-02.6 101 74.00 2659 4319 57272 10129 100.0 1.332 ! Near Maximum !
-02.0 101 74.50 2677 4377 58731 10153 100.0 1.317 ! Near Maximum !
-01.3 102 75.00 2695 4436 60232 10177 100.0 1.303 ! Near Maximum !
-00.7 103 75.50 2713 4494 61780 10200 100.0 1.288 ! Near Maximum !
+00.0 104 76.00 2731 4553 63373 10223 100.0 1.275 ! Near Maximum !
+00.7 104 76.50 2748 4612 65015 10246 100.0 1.261 !DANGEROUS LOAD-DO NOT USE!
+01.3 105 77.00 2766 4672 66708 10268 100.0 1.247 !DANGEROUS LOAD-DO NOT USE!
+02.0 106 77.50 2784 4732 68454 10289 100.0 1.234 !DANGEROUS LOAD-DO NOT USE!
+02.6 106 78.00 2801 4792 70252 10310 100.0 1.220 !DANGEROUS LOAD-DO NOT USE!
+03.3 107 78.50 2819 4852 72105 10330 100.0 1.207 !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 76.00 2834 4906 80375 9768 100.0 1.172 !DANGEROUS LOAD-DO NOT USE!
Data for burning rate decreased by 10% relative to nominal value:
-Ba 104 76.00 2567 4024 48933 10791 99.3 1.414
76
76.5
77
Nothing ground breaking as far as accuracy, but maybe I can work with the seating depth a little with it and see if I can pull them together. Looks like somewhere in the 76.5-77 grain mark will be where I end up. Pretty powerful combo though. I'd love to take that load hunting. Elmer seemed to like them quite alot back in the old days.
