Load Specifications
Bullet Manufacturer:Nosler
Bullet Weight:225 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:8.5 mm Messner Mag. load data
Case Length (l3):2.508"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:106 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:25.6"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:12.0
Load data in caliber 8.5 mm Messner Mag. with .338 | 225gr | Nosler Expansion Tip bullet and 104 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-26 and Hodgdon Superformance.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 84% | 57,261 psi | 90% | 2730 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,463 psi | 87% | 2766 fps | 99.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,518 psi | 82% | 2802 fps | 99.8% |
| Accurate 4064 | <<locked>> | 86% | 57,609 psi | 90% | 2785 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 54,940 psi | 86% | 2851 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 54,897 psi | 86% | 2949 fps | 97% |
| ADI AR 2206H | <<locked>> | 82% | 56,913 psi | 89% | 2822 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 54,839 psi | 86% | 2782 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,231 psi | 88% | 2904 fps | 98.9% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 53,969 psi | 85% | 2900 fps | 97.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 53,911 psi | 84% | 2900 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 56,405 psi | 88% | 2900 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,390 psi | 87% | 2799 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,666 psi | 87% | 2825 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,941 psi | 88% | 2910 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 57,406 psi | 90% | 2933 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 55,550 psi | 87% | 2890 fps | 98.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,678 psi | 83% | 2894 fps | 98.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,559 psi | 78% | 2822 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,105 psi | 68% | 2753 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 57,435 psi | 90% | 3022 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 57,159 psi | 90% | 2844 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,095 psi | 75% | 2815 fps | 97.8% |
| Bofors RP3 | <<locked>> | 86% | 56,188 psi | 88% | 2818 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,678 psi | 83% | 2894 fps | 98.7% |
| Bofors RP7 | <<locked>> | 90% | 55,506 psi | 87% | 2805 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 86% | 56,724 psi | 89% | 2838 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 57,377 psi | 90% | 2907 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 90% | 57,363 psi | 90% | 2871 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 98% | 54,027 psi | 85% | 2844 fps | 97% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 56,681 psi | 89% | 2884 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 82% | 57,580 psi | 90% | 2828 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 56,362 psi | 88% | 2831 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,331 psi | 85% | 2818 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 42,163 psi | 66% | 2782 fps | 97.1% |
| Hodgdon Superformance | <<locked>> | 90% | 53,969 psi | 85% | 2894 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,245 psi | 57% | 1729 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,172 psi | 86% | 2782 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,143 psi | 85% | 2762 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 56,869 psi | 89% | 2799 fps | 99.7% |
| IMR 4350 | <<locked>> | 94% | 56,695 psi | 89% | 2841 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 90% | 57,305 psi | 90% | 2835 fps | 99.7% |
| IMR 4831 | <<locked>> | 94% | 55,506 psi | 87% | 2844 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 57,087 psi | 89% | 2851 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 55,666 psi | 87% | 2831 fps | 97.4% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,213 psi | 80% | 2867 fps | 97.2% |
| Lovex D073.6 | <<locked>> | 82% | 57,334 psi | 90% | 2792 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 55,680 psi | 87% | 2743 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 57,682 psi | 90% | 2799 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 57,174 psi | 90% | 2825 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 55,100 psi | 86% | 2818 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,584 psi | 68% | 2657 fps | 98.9% |
| Norma 201 | <<locked>> | 82% | 55,434 psi | 87% | 2759 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,333 psi | 88% | 2756 fps | 100% |
| Norma 203B | <<locked>> | 84% | 54,897 psi | 86% | 2808 fps | 100% |
| Norma 204 | <<locked>> | 94% | 57,638 psi | 90% | 2897 fps | 98.9% |
| Norma MRPᴾ | <<locked>> | 100% | 55,970 psi | 88% | 2979 fps | 99.8% |
| Norma URP | <<locked>> | 94% | 57,406 psi | 90% | 2890 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 55,767 psi | 87% | 2835 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 51,576 psi | 81% | 2884 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 94% | 56,376 psi | 88% | 2897 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,701 psi | 72% | 2759 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,956 psi | 58% | 1772 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,652 psi | 89% | 2825 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 56,855 psi | 89% | 2894 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 57,014 psi | 89% | 2927 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,911 psi | 86% | 2877 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 57,609 psi | 90% | 2966 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 41,901 psi | 66% | 2772 fps | 98% |
| Rottweil R 902 | <<locked>> | 84% | 56,246 psi | 88% | 2762 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,275 psi | 88% | 2812 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,288 psi | 85% | 2818 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 98% | 54,592 psi | 86% | 2874 fps | 98.9% |
| Rottweil R 907 | <<locked>> | 90% | 55,506 psi | 87% | 2805 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 57,174 psi | 90% | 2825 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 82% | 57,334 psi | 90% | 2792 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 57,682 psi | 90% | 2799 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,100 psi | 86% | 2818 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,273 psi | 85% | 2822 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,521 psi | 87% | 2795 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,507 psi | 89% | 2690 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 57,363 psi | 90% | 2694 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 57,130 psi | 90% | 2782 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,114 psi | 85% | 2871 fps | 98.8% |
| Somchem S335 | <<locked>> | 82% | 56,014 psi | 88% | 2687 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 56,289 psi | 88% | 2808 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 55,999 psi | 88% | 2812 fps | 97.2% |
| Somchem S365 | <<locked>> | 96% | 56,695 psi | 89% | 2887 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,288 psi | 87% | 2851 fps | 99.4% |
| Vihtavuori N133 | <<locked>> | 82% | 57,101 psi | 89% | 2671 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 56,695 psi | 89% | 2720 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 56,913 psi | 89% | 2736 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 57,580 psi | 90% | 2779 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 56,028 psi | 88% | 2835 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,908 psi | 80% | 2769 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 84% | 54,998 psi | 86% | 2736 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,056 psi | 86% | 2841 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,506 psi | 87% | 2897 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 56,362 psi | 88% | 2969 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,767 psi | 87% | 2802 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 57,653 psi | 90% | 2910 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,701 psi | 70% | 2884 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,637 psi | 87% | 2805 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,637 psi | 87% | 2848 fps | 98.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 50,198 psi | 79% | 2638 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,573 psi | 76% | 2657 fps | 98.3% |
| Accurate 3100 | <<locked>> | 86% | 32,343 psi | 51% | 2425 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 47,601 psi | 75% | 2648 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,071 psi | 57% | 2520 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 96% | 47,659 psi | 75% | 2828 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 53,359 psi | 84% | 2769 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,455 psi | 71% | 2631 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 40,495 psi | 63% | 2621 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 94% | 44,019 psi | 69% | 2720 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,140 psi | 79% | 2841 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 40,567 psi | 64% | 2621 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,672 psi | 72% | 2651 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,834 psi | 77% | 2720 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,578 psi | 56% | 2536 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,219 psi | 63% | 2657 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 40,132 psi | 63% | 2615 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 92% | 40,161 psi | 63% | 2664 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,759 psi | 40% | 2293 fps | 96.6% |
| Alliant Reloder-25 | <<locked>> | 90% | 31,183 psi | 49% | 2467 fps | 95.8% |
| Alliant Reloder-26 | 74.1 gr | 82% | 29,370 psi | 46% | 2461 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,432 psi | 84% | 2792 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 39,465 psi | 62% | 2644 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 45,905 psi | 72% | 2661 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 40,161 psi | 63% | 2664 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 40,466 psi | 63% | 2539 fps | 96.8% |
| Hodgdon H380 | <<locked>> | 80% | 46,340 psi | 73% | 2677 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 38,334 psi | 60% | 2572 fps | 96.8% |
| Hodgdon H4350 | <<locked>> | 80% | 41,437 psi | 65% | 2595 fps | 96.3% |
| Hodgdon H4831 | <<locked>> | 94% | 47,152 psi | 74% | 2726 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 46,238 psi | 72% | 2710 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 53,954 psi | 85% | 2779 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,924 psi | 52% | 2428 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,676 psi | 79% | 2766 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 39,508 psi | 62% | 2720 fps | 96.1% |
| Hodgdon Superformance | 74.5 gr | 80% | 37,188 psi | 58% | 2579 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,122 psi | 43% | 1545 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,706 psi | 81% | 2730 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,819 psi | 75% | 2664 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,067 psi | 78% | 2694 fps | 99.1% |
| IMR 4350 | <<locked>> | 80% | 36,274 psi | 57% | 2470 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,945 psi | 66% | 2572 fps | 97.6% |
| IMR 4831 | <<locked>> | 80% | 34,853 psi | 55% | 2477 fps | 98.4% |
| IMR 4895 | <<locked>> | 80% | 50,111 psi | 79% | 2746 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 46,064 psi | 72% | 2671 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 96% | 44,701 psi | 70% | 2746 fps | 95.5% |
| Lovex D073.6 | <<locked>> | 80% | 53,679 psi | 84% | 2743 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 52,431 psi | 82% | 2697 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,790 psi | 75% | 2657 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,378 psi | 62% | 2523 fps | 98.2% |
| Lovex S070 | <<locked>> | 80% | 37,536 psi | 59% | 2500 fps | 96.7% |
| Lovex S071 | <<locked>> | 90% | 31,270 psi | 49% | 2398 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 52,156 psi | 82% | 2713 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,765 psi | 83% | 2710 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,182 psi | 76% | 2707 fps | 100% |
| Norma 204 | <<locked>> | 84% | 40,843 psi | 64% | 2608 fps | 95.6% |
| Norma MRP | <<locked>> | 86% | 34,156 psi | 54% | 2552 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 36,158 psi | 57% | 2520 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 80% | 48,573 psi | 76% | 2730 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 44,556 psi | 70% | 2756 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 35,027 psi | 55% | 2507 fps | 96.7% |
| Ramshot Magnum | <<locked>> | 94% | 36,666 psi | 57% | 2572 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,528 psi | 43% | 1581 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,383 psi | 73% | 2661 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,924 psi | 83% | 2835 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,815 psi | 67% | 2710 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,027 psi | 56% | 2543 fps | 98.3% |
| ReloadSwiss RS 70 | 71.6 gr | 80% | 35,070 psi | 55% | 2549 fps | 97.8% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 36,376 psi | 57% | 2638 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 49,559 psi | 78% | 2667 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,120 psi | 68% | 2612 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 44,860 psi | 70% | 2657 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 88% | 38,986 psi | 61% | 2595 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 40,466 psi | 63% | 2539 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,378 psi | 62% | 2523 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 53,679 psi | 84% | 2743 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,790 psi | 75% | 2657 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,536 psi | 59% | 2500 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,411 psi | 70% | 2664 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,880 psi | 81% | 2743 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,084 psi | 83% | 2644 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,817 psi | 70% | 2520 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,508 psi | 60% | 2467 fps | 96.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 38,624 psi | 61% | 2589 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 52,794 psi | 83% | 2644 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,613 psi | 68% | 2612 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 45,905 psi | 72% | 2644 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 32,605 psi | 51% | 2477 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 37,072 psi | 58% | 2526 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 53,708 psi | 84% | 2628 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,922 psi | 78% | 2631 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,154 psi | 79% | 2644 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,597 psi | 65% | 2539 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,536 psi | 59% | 2520 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 90% | 36,390 psi | 57% | 2500 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 48,399 psi | 76% | 2641 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,999 psi | 58% | 2520 fps | 98.5% |
| Vihtavuori N555 | <<locked>> | 80% | 28,181 psi | 44% | 2365 fps | 96.6% |
| Vihtavuori N560 | <<locked>> | 94% | 45,701 psi | 72% | 2785 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,869 psi | 58% | 2493 fps | 99.8% |
| Winchester 760 | <<locked>> | 80% | 38,493 psi | 60% | 2575 fps | 96.9% |
| Winchester StaBALL HD | <<locked>> | 82% | 24,163 psi | 38% | 2323 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,953 psi | 81% | 2749 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 39,102 psi | 61% | 2562 fps | 95.2% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 104 powders for 8.5 mm Messner Mag. loaded with the .338 | 225gr | Nosler Expansion Tip. Alliant Reloder-26 delivers the highest muzzle velocity at 3,022 fps; across all powders the maximum-charge window runs from 1,729 fps to 3,022 fps. Accurate 3100 gives the best case fill at 100 %, and 104 of the 104 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 225.0 gr projectile in 0.338" calls for a 1:12.0 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. ReloadSwiss RS 70, Alliant Reloder-26, Hodgdon Superformance rank at the top here: for 8.5 mm Messner Mag. with the .338 | 225gr | Nosler Expansion Tip they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.