Load Specifications
Bullet:.338 | 200gr | Barnes Solid
Bullet Manufacturer:Barnes
Bullet Weight:200 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:1:13.0
Load data in caliber 8.5 mm Messner Mag. with .338 | 200gr | Barnes Solid bullet and 105 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-17 and ReloadSwiss RS 60.
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% | 55,999 psi | 88% | 2881 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 57,392 psi | 90% | 2949 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,792 psi | 80% | 2930 fps | 99.2% |
| Accurate 4064 | <<locked>> | 86% | 56,246 psi | 88% | 2936 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 56,710 psi | 89% | 3045 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 55,521 psi | 87% | 3136 fps | 97.3% |
| ADI AR 2206H | <<locked>> | 82% | 55,317 psi | 87% | 2966 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,521 psi | 89% | 2972 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,273 psi | 85% | 3028 fps | 97.7% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 51,909 psi | 81% | 3012 fps | 95.9% |
| ADI Benchmark 8208 | <<locked>> | 82% | 57,508 psi | 90% | 2959 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,579 psi | 87% | 3097 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,114 psi | 85% | 3022 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 57,174 psi | 90% | 2995 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 57,508 psi | 90% | 3018 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 57,363 psi | 90% | 3100 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,085 psi | 86% | 3074 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,014 psi | 89% | 3071 fps | 98.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,415 psi | 79% | 3012 fps | 97.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,630 psi | 75% | 2953 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,640 psi | 65% | 2864 fps | 98.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,549 psi | 85% | 3150 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,158 psi | 86% | 2982 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,238 psi | 72% | 2930 fps | 96.2% |
| Bofors RP3 | <<locked>> | 86% | 54,433 psi | 85% | 2959 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,415 psi | 79% | 3012 fps | 97.3% |
| Bofors RP7 | <<locked>> | 92% | 57,406 psi | 90% | 2992 fps | 98.9% |
| Hodgdon BL-C2 | <<locked>> | 82% | 57,653 psi | 90% | 2995 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 54,882 psi | 86% | 2972 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 92% | 55,419 psi | 87% | 3041 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 90% | 55,347 psi | 87% | 2999 fps | 98.2% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 55,724 psi | 87% | 3018 fps | 96.1% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 54,476 psi | 85% | 2999 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 82% | 55,912 psi | 88% | 2972 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 57,609 psi | 90% | 3015 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,115 psi | 88% | 3012 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,550 psi | 87% | 3077 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,129 psi | 57% | 1841 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 56,985 psi | 89% | 2976 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,521 psi | 89% | 2949 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,985 psi | 88% | 2953 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,347 psi | 87% | 2933 fps | 99% |
| IMR 4350 | <<locked>> | 94% | 54,737 psi | 86% | 2969 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,608 psi | 87% | 2966 fps | 99% |
| IMR 4831 | <<locked>> | 96% | 57,029 psi | 89% | 3031 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,230 psi | 87% | 2992 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 57,392 psi | 90% | 3009 fps | 96.6% |
| IMR 8208 XBR | <<locked>> | 82% | 57,508 psi | 90% | 2959 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,695 psi | 87% | 2936 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 57,740 psi | 90% | 2940 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 55,985 psi | 88% | 2943 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,695 psi | 87% | 2963 fps | 99.7% |
| Lovex S070 | <<locked>> | 94% | 56,913 psi | 89% | 3005 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,032 psi | 66% | 2772 fps | 97.7% |
| Norma 201 | <<locked>> | 84% | 57,638 psi | 90% | 2959 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,665 psi | 86% | 2904 fps | 100% |
| Norma 203B | <<locked>> | 86% | 56,724 psi | 89% | 3002 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,448 psi | 87% | 3022 fps | 97.8% |
| Norma MRPᴾ | <<locked>> | 100% | 53,664 psi | 84% | 3100 fps | 99% |
| Norma URP | <<locked>> | 94% | 55,492 psi | 87% | 3028 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 57,696 psi | 90% | 3031 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 54,143 psi | 85% | 3025 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,005 psi | 69% | 2861 fps | 96.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,811 psi | 58% | 1886 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,911 psi | 86% | 2956 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,636 psi | 86% | 3031 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,679 psi | 86% | 3068 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 56,695 psi | 89% | 3068 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,274 psi | 87% | 3097 fps | 100% |
| Rottweil R 902 | <<locked>> | 84% | 54,679 psi | 86% | 2907 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,476 psi | 85% | 2953 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,956 psi | 88% | 2995 fps | 96.9% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,130 psi | 88% | 3054 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 92% | 57,406 psi | 90% | 2992 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,695 psi | 87% | 2963 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,695 psi | 87% | 2936 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,985 psi | 88% | 2943 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 56,913 psi | 89% | 3005 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,985 psi | 88% | 3012 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,550 psi | 89% | 2969 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 57,246 psi | 90% | 2989 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,926 psi | 86% | 2835 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,854 psi | 88% | 2838 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,477 psi | 87% | 2913 fps | 99.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,622 psi | 87% | 3051 fps | 98.2% |
| Somchem S335 | <<locked>> | 82% | 54,592 psi | 86% | 2831 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,115 psi | 88% | 2953 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,578 psi | 86% | 2949 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 54,273 psi | 85% | 3028 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 56,855 psi | 89% | 3031 fps | 98.9% |
| Vihtavuori N133 | <<locked>> | 82% | 55,419 psi | 87% | 2818 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,969 psi | 86% | 2867 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,187 psi | 86% | 2881 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,796 psi | 87% | 2923 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 57,609 psi | 90% | 3018 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,095 psi | 77% | 2890 fps | 97.4% |
| Vihtavuori N540 | <<locked>> | 86% | 57,000 psi | 89% | 2927 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 56,739 psi | 89% | 3028 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,345 psi | 84% | 3031 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,172 psi | 85% | 3087 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 57,653 psi | 90% | 2989 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,608 psi | 87% | 3045 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,888 psi | 67% | 2999 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 57,450 psi | 90% | 2995 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,476 psi | 84% | 2969 fps | 97.6% |
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% | 49,023 psi | 77% | 2782 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,195 psi | 74% | 2779 fps | 97.1% |
| Accurate 3100 | <<locked>> | 88% | 33,620 psi | 53% | 2585 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 46,398 psi | 73% | 2785 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,128 psi | 55% | 2638 fps | 97.4% |
| Accurate High Country | <<locked>> | 96% | 48,095 psi | 75% | 3002 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 52,040 psi | 82% | 2913 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,106 psi | 69% | 2759 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 44,643 psi | 70% | 2851 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 98% | 48,646 psi | 76% | 2949 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 54,085 psi | 85% | 2910 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,298 psi | 76% | 2976 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 44,599 psi | 70% | 2848 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,396 psi | 70% | 2785 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,543 psi | 75% | 2854 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,447 psi | 54% | 2648 fps | 97.4% |
| Alliant Reloder-17 | 73.1 gr | 80% | 38,928 psi | 61% | 2779 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,063 psi | 69% | 2841 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,179 psi | 69% | 2890 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,818 psi | 42% | 2448 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,447 psi | 54% | 2684 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 86% | 32,866 psi | 52% | 2690 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,735 psi | 81% | 2927 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 43,410 psi | 68% | 2871 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 44,585 psi | 70% | 2795 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 44,179 psi | 69% | 2890 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 39,523 psi | 62% | 2661 fps | 95.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 53,824 psi | 84% | 2940 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 45,092 psi | 71% | 2805 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 80% | 37,115 psi | 58% | 2684 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 82% | 42,844 psi | 67% | 2769 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 98% | 51,982 psi | 81% | 2956 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 98% | 51,024 psi | 80% | 2940 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 52,576 psi | 82% | 2923 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,010 psi | 50% | 2543 fps | 98.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,095 psi | 77% | 2904 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 38,841 psi | 61% | 2753 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,064 psi | 42% | 1647 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,154 psi | 79% | 2867 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 52,953 psi | 83% | 2900 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,383 psi | 73% | 2795 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,631 psi | 76% | 2822 fps | 98.1% |
| IMR 4350 | <<locked>> | 84% | 39,914 psi | 63% | 2690 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,828 psi | 64% | 2690 fps | 96.1% |
| IMR 4831 | <<locked>> | 80% | 33,823 psi | 53% | 2592 fps | 97% |
| IMR 4895 | <<locked>> | 80% | 48,776 psi | 76% | 2887 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 50,517 psi | 79% | 2894 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 54,085 psi | 85% | 2910 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 52,083 psi | 82% | 2884 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,155 psi | 80% | 2838 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,630 psi | 73% | 2795 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,363 psi | 60% | 2641 fps | 96.9% |
| Lovex S070 | <<locked>> | 80% | 36,637 psi | 57% | 2618 fps | 95.1% |
| Lovex S071 | <<locked>> | 94% | 34,679 psi | 54% | 2612 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 50,734 psi | 80% | 2854 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,329 psi | 80% | 2854 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,920 psi | 74% | 2841 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 45,194 psi | 71% | 2841 fps | 95.6% |
| Norma MRP | <<locked>> | 90% | 38,014 psi | 60% | 2785 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 35,041 psi | 55% | 2635 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 80% | 46,963 psi | 74% | 2861 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 36,303 psi | 57% | 2674 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 98% | 41,017 psi | 64% | 2799 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,441 psi | 43% | 1686 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,208 psi | 71% | 2785 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,024 psi | 80% | 2972 fps | 100% |
| ReloadSwiss RS 60 | 73.1 gr | 80% | 41,394 psi | 65% | 2841 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,766 psi | 54% | 2654 fps | 96.9% |
| ReloadSwiss RS 70 | 74.2 gr | 80% | 34,084 psi | 53% | 2654 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 48,457 psi | 76% | 2808 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,959 psi | 66% | 2740 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 49,313 psi | 77% | 2884 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 92% | 43,004 psi | 67% | 2822 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 39,523 psi | 62% | 2661 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,363 psi | 60% | 2641 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,083 psi | 82% | 2884 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,630 psi | 73% | 2795 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,637 psi | 57% | 2618 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,946 psi | 67% | 2792 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,750 psi | 83% | 2910 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,357 psi | 79% | 2881 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,779 psi | 81% | 2789 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,613 psi | 68% | 2654 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,579 psi | 59% | 2582 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 42,598 psi | 67% | 2815 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 51,372 psi | 81% | 2785 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,634 psi | 82% | 2900 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,351 psi | 66% | 2740 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 31,575 psi | 49% | 2589 fps | 99.1% |
| Somchem S385 | <<locked>> | 90% | 40,930 psi | 64% | 2746 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 52,257 psi | 82% | 2772 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,530 psi | 76% | 2772 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,733 psi | 76% | 2785 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,437 psi | 63% | 2667 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,477 psi | 57% | 2638 fps | 97.6% |
| Vihtavuori N165 | <<locked>> | 94% | 40,176 psi | 63% | 2717 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 47,094 psi | 74% | 2779 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,955 psi | 56% | 2635 fps | 97.2% |
| Vihtavuori N555 | <<locked>> | 82% | 29,298 psi | 46% | 2526 fps | 95.8% |
| Vihtavuori N560 | <<locked>> | 98% | 50,401 psi | 79% | 3018 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,810 psi | 56% | 2608 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 37,260 psi | 58% | 2690 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,280 psi | 40% | 2470 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,256 psi | 79% | 2887 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 43,308 psi | 68% | 2785 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 105 powders for 8.5 mm Messner Mag. loaded with the .338 | 200gr | Barnes Solid. Alliant Reloder-26 delivers the highest muzzle velocity at 3,150 fps; across all powders the maximum-charge window runs from 1,841 fps to 3,150 fps. Accurate 3100 gives the best case fill at 100 %, and 105 of the 105 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 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, 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-17, ReloadSwiss RS 60 rank at the top here: for 8.5 mm Messner Mag. with the .338 | 200gr | Barnes Solid 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.