Load Specifications
Bullet:.338 | 200gr | Speer Hot-Cor
Bullet Manufacturer:Speer
Bullet Weight:200 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:.338 Norma Mag. load data
Case Length (l3):2.49"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:105.4 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:6.0
Load data in caliber .338 Norma Mag. with .338 | 200gr | Speer Hot-Cor bullet and 102 powders. The key underlying parameters are shown in the table above.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 54,940 psi | 86% | 2808 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,159 psi | 88% | 2874 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,027 psi | 85% | 2910 fps | 99.5% |
| Accurate 4064 | <<locked>> | 84% | 55,187 psi | 86% | 2861 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 56,159 psi | 88% | 2966 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 55,027 psi | 86% | 3051 fps | 97.1% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 56,231 psi | 88% | 3051 fps | 96% |
| ADI AR 2206H | <<locked>> | 82% | 57,609 psi | 90% | 2940 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,274 psi | 87% | 2890 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 57,072 psi | 89% | 3009 fps | 98.2% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,810 psi | 86% | 2995 fps | 96.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,534 psi | 85% | 3012 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 57,188 psi | 90% | 3002 fps | 98.2% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 57,188 psi | 90% | 3002 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,086 psi | 88% | 2913 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,362 psi | 88% | 2936 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 56,724 psi | 89% | 3025 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 54,418 psi | 85% | 2995 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 56,362 psi | 88% | 2995 fps | 98.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,693 psi | 84% | 2995 fps | 97.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,749 psi | 80% | 2930 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,077 psi | 69% | 2848 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,331 psi | 85% | 3064 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 57,740 psi | 90% | 2956 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,081 psi | 77% | 2913 fps | 96.8% |
| Bofors RP3 | <<locked>> | 86% | 57,043 psi | 89% | 2933 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,693 psi | 84% | 2995 fps | 97.9% |
| Bofors RP7 | <<locked>> | 90% | 56,405 psi | 88% | 2917 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 86% | 57,522 psi | 90% | 2949 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 54,592 psi | 86% | 2963 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 88% | 54,476 psi | 85% | 2923 fps | 98.1% |
| Hodgdon H4831 | <<locked>> | 98% | 54,853 psi | 86% | 2940 fps | 95.9% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 57,580 psi | 90% | 2986 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 57,145 psi | 90% | 2943 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,056 psi | 86% | 2933 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 54,810 psi | 86% | 2995 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,419 psi | 57% | 1831 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,622 psi | 87% | 2894 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,839 psi | 86% | 2877 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 57,392 psi | 90% | 2910 fps | 99.3% |
| IMR 4350 | <<locked>> | 94% | 57,334 psi | 90% | 2946 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,462 psi | 85% | 2887 fps | 98.9% |
| IMR 4831 | <<locked>> | 94% | 56,579 psi | 89% | 2956 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,273 psi | 85% | 2913 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,478 psi | 89% | 2933 fps | 96.5% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 52,214 psi | 82% | 2966 fps | 96.1% |
| Lovex S060 | <<locked>> | 82% | 56,318 psi | 88% | 2861 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,911 psi | 86% | 2867 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,607 psi | 86% | 2884 fps | 99.6% |
| Lovex S070 | <<locked>> | 92% | 55,999 psi | 88% | 2930 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,817 psi | 70% | 2759 fps | 98.2% |
| Norma 201 | <<locked>> | 82% | 56,333 psi | 88% | 2884 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,043 psi | 89% | 2877 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,651 psi | 87% | 2923 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,621 psi | 86% | 2943 fps | 97.6% |
| Norma MRPᴾ | <<locked>> | 100% | 57,130 psi | 90% | 3081 fps | 99.4% |
| Norma URP | <<locked>> | 92% | 54,752 psi | 86% | 2949 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 56,449 psi | 88% | 2949 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,417 psi | 82% | 2979 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 94% | 57,334 psi | 90% | 3005 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,862 psi | 73% | 2851 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,101 psi | 58% | 1873 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 57,377 psi | 90% | 2933 fps | 99.6% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 57,479 psi | 90% | 3009 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 53,896 psi | 84% | 2986 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 56,086 psi | 88% | 2989 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,491 psi | 85% | 3015 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,207 psi | 68% | 2864 fps | 97% |
| Rottweil R 902 | <<locked>> | 84% | 57,014 psi | 89% | 2881 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 57,101 psi | 89% | 2927 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,201 psi | 87% | 2923 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 98% | 55,535 psi | 87% | 2979 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 90% | 56,405 psi | 88% | 2917 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,607 psi | 86% | 2884 fps | 99.6% |
| Shooters World Precision | <<locked>> | 84% | 54,911 psi | 86% | 2867 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,999 psi | 88% | 2930 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,042 psi | 86% | 2933 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,072 psi | 88% | 2907 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,072 psi | 89% | 2812 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,607 psi | 86% | 2766 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,404 psi | 85% | 2838 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 55,042 psi | 86% | 2972 fps | 98.1% |
| Somchem S335 | <<locked>> | 82% | 56,768 psi | 89% | 2808 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,072 psi | 89% | 2923 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 57,014 psi | 89% | 2910 fps | 96.3% |
| Somchem S365 | <<locked>> | 96% | 57,711 psi | 90% | 3002 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,391 psi | 88% | 2956 fps | 98.9% |
| Vihtavuori N133 | <<locked>> | 82% | 57,595 psi | 90% | 2792 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 57,392 psi | 90% | 2841 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 57,682 psi | 90% | 2854 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,766 psi | 86% | 2844 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 56,884 psi | 89% | 2946 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,996 psi | 81% | 2874 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 84% | 55,738 psi | 87% | 2851 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 56,014 psi | 88% | 2949 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,637 psi | 89% | 3009 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 57,377 psi | 90% | 3068 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,681 psi | 89% | 2910 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,766 psi | 86% | 2963 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,759 psi | 72% | 2982 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,275 psi | 88% | 2917 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 56,681 psi | 89% | 2949 fps | 98.1% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 51,416 psi | 81% | 2759 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,153 psi | 77% | 2759 fps | 97.5% |
| Accurate 3100 | <<locked>> | 88% | 35,795 psi | 56% | 2572 fps | 95.6% |
| Accurate 4064 | <<locked>> | 80% | 48,660 psi | 76% | 2762 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,101 psi | 58% | 2621 fps | 97.8% |
| Accurate High Country | <<locked>> | 94% | 47,935 psi | 75% | 2927 fps | 95.4% |
| Accurate MAGPRO | <<locked>> | 98% | 52,330 psi | 82% | 2986 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 54,099 psi | 85% | 2887 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,977 psi | 72% | 2736 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 43,990 psi | 69% | 2772 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 98% | 51,271 psi | 80% | 2936 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,821 psi | 80% | 2953 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 44,019 psi | 69% | 2772 fps | 95.3% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 44,019 psi | 69% | 2772 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,441 psi | 73% | 2762 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,632 psi | 78% | 2831 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,158 psi | 57% | 2631 fps | 97.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,973 psi | 64% | 2759 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 43,511 psi | 68% | 2762 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 94% | 43,816 psi | 69% | 2812 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,498 psi | 42% | 2375 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 92% | 34,229 psi | 54% | 2612 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 84% | 32,576 psi | 51% | 2612 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 54,056 psi | 85% | 2904 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 43,207 psi | 68% | 2799 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 46,818 psi | 73% | 2772 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 43,816 psi | 69% | 2812 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 41,249 psi | 65% | 2641 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 47,239 psi | 74% | 2785 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 39,088 psi | 61% | 2667 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 80% | 42,003 psi | 66% | 2690 fps | 95% |
| Hodgdon H4831 | <<locked>> | 96% | 51,271 psi | 80% | 2881 fps | 95.1% |
| Hodgdon H4831 SC | <<locked>> | 98% | 53,809 psi | 84% | 2923 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,634 psi | 53% | 2523 fps | 98.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,416 psi | 81% | 2877 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 40,872 psi | 64% | 2736 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,166 psi | 43% | 1637 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,344 psi | 82% | 2844 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,356 psi | 76% | 2772 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,604 psi | 79% | 2799 fps | 98.4% |
| IMR 4350 | <<locked>> | 82% | 39,291 psi | 62% | 2618 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,525 psi | 67% | 2671 fps | 96.5% |
| IMR 4831 | <<locked>> | 80% | 35,665 psi | 56% | 2572 fps | 97.4% |
| IMR 4895 | <<locked>> | 80% | 50,908 psi | 80% | 2861 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 52,997 psi | 83% | 2877 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 98% | 48,805 psi | 76% | 2904 fps | 95.2% |
| Lovex S060 | <<locked>> | 80% | 52,881 psi | 83% | 2808 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,515 psi | 76% | 2769 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,089 psi | 63% | 2621 fps | 97.3% |
| Lovex S070 | <<locked>> | 80% | 38,348 psi | 60% | 2598 fps | 95.6% |
| Lovex S071 | <<locked>> | 92% | 34,592 psi | 54% | 2543 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 52,866 psi | 83% | 2831 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,505 psi | 84% | 2828 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,979 psi | 77% | 2818 fps | 100% |
| Norma 204 | <<locked>> | 86% | 44,469 psi | 70% | 2762 fps | 95.2% |
| Norma MRP | <<locked>> | 90% | 40,234 psi | 63% | 2766 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 36,898 psi | 58% | 2618 fps | 97.6% |
| Ramshot Big Game | <<locked>> | 80% | 49,327 psi | 77% | 2838 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 48,907 psi | 77% | 2917 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 35,723 psi | 56% | 2595 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 96% | 40,509 psi | 63% | 2723 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,702 psi | 43% | 1677 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,210 psi | 74% | 2766 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,577 psi | 84% | 2949 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,526 psi | 68% | 2815 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,796 psi | 58% | 2635 fps | 97.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 35,868 psi | 56% | 2641 fps | 96.6% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 40,161 psi | 63% | 2792 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 50,357 psi | 79% | 2782 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,019 psi | 69% | 2717 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 48,486 psi | 76% | 2805 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 90% | 42,598 psi | 67% | 2746 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 41,249 psi | 65% | 2641 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,089 psi | 63% | 2621 fps | 97.3% |
| Shooters World Precision | <<locked>> | 80% | 48,515 psi | 76% | 2769 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,348 psi | 60% | 2598 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,107 psi | 71% | 2769 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,489 psi | 82% | 2854 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,693 psi | 84% | 2766 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,382 psi | 71% | 2631 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,218 psi | 61% | 2562 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 42,206 psi | 66% | 2743 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 53,359 psi | 84% | 2759 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,338 psi | 69% | 2717 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 53,345 psi | 84% | 2854 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 33,359 psi | 52% | 2572 fps | 99.3% |
| Somchem S385 | <<locked>> | 88% | 40,582 psi | 64% | 2674 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 54,215 psi | 85% | 2746 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,647 psi | 79% | 2749 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,778 psi | 80% | 2759 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,308 psi | 66% | 2648 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,305 psi | 60% | 2615 fps | 97.9% |
| Vihtavuori N165 | <<locked>> | 94% | 42,569 psi | 67% | 2703 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 49,197 psi | 77% | 2753 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,855 psi | 59% | 2618 fps | 97.6% |
| Vihtavuori N555 | <<locked>> | 80% | 29,153 psi | 46% | 2457 fps | 95.4% |
| Vihtavuori N560 | <<locked>> | 96% | 50,125 psi | 79% | 2943 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,536 psi | 59% | 2585 fps | 99.4% |
| Winchester 760 | <<locked>> | 80% | 39,088 psi | 61% | 2667 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,760 psi | 42% | 2464 fps | 96.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,620 psi | 82% | 2861 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 45,774 psi | 72% | 2769 fps | 95.8% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 102 powders for .338 Norma Mag. loaded with the .338 | 200gr | Speer Hot-Cor. Norma MRP delivers the highest muzzle velocity at 3,081 fps; across all powders the maximum-charge window runs from 1,831 fps to 3,081 fps. Accurate 3100 gives the best case fill at 100 %, and 102 of the 102 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 200.0 gr projectile in 0.338" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.