Load Specifications
Bullet:.338 | 225gr | CutEdge LZR
Bullet Manufacturer:Cutting Edge
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:1:10.5
Load data in caliber 8.5 mm Messner Mag. with .338 | 225gr | CutEdge LZR bullet and 106 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% | 55,695 psi | 87% | 2703 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,925 psi | 85% | 2733 fps | 98.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,676 psi | 79% | 2766 fps | 99.6% |
| Accurate 4064 | <<locked>> | 86% | 56,101 psi | 88% | 2759 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 56,927 psi | 89% | 2871 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 52,982 psi | 83% | 2910 fps | 96.4% |
| ADI AR 2206H | <<locked>> | 82% | 55,521 psi | 87% | 2792 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,811 psi | 89% | 2799 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,679 psi | 86% | 2871 fps | 98.6% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,156 psi | 82% | 2858 fps | 97% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 56,072 psi | 88% | 2923 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 57,537 psi | 90% | 2822 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,288 psi | 85% | 2795 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,288 psi | 85% | 2877 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,680 psi | 87% | 2904 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,334 psi | 90% | 2907 fps | 99% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,749 psi | 80% | 2854 fps | 98.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,935 psi | 75% | 2792 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,713 psi | 65% | 2717 fps | 99.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,027 psi | 86% | 2986 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,550 psi | 87% | 2815 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,412 psi | 73% | 2779 fps | 97.2% |
| Bofors RP3 | <<locked>> | 86% | 54,607 psi | 86% | 2789 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,749 psi | 80% | 2854 fps | 98.2% |
| Bofors RP7 | <<locked>> | 92% | 57,696 psi | 90% | 2825 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 86% | 55,085 psi | 86% | 2805 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 55,869 psi | 88% | 2877 fps | 99.6% |
| Hodgdon H4350 | <<locked>> | 90% | 55,840 psi | 88% | 2838 fps | 98.9% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 56,188 psi | 88% | 2864 fps | 97.2% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 54,795 psi | 86% | 2841 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 82% | 56,159 psi | 88% | 2799 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,476 psi | 85% | 2799 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,463 psi | 88% | 2838 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 40,814 psi | 64% | 2743 fps | 96.3% |
| Hodgdon Superformance | <<locked>> | 92% | 56,130 psi | 88% | 2917 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,085 psi | 57% | 1713 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 57,305 psi | 90% | 2802 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,971 psi | 89% | 2772 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 56,217 psi | 88% | 2779 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,506 psi | 87% | 2769 fps | 99.5% |
| IMR 4350 | <<locked>> | 94% | 55,100 psi | 86% | 2808 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,072 psi | 88% | 2805 fps | 99.5% |
| IMR 4831 | <<locked>> | 96% | 57,537 psi | 90% | 2864 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,709 psi | 87% | 2822 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 54,259 psi | 85% | 2799 fps | 97% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 49,617 psi | 78% | 2828 fps | 96.6% |
| Lovex D073.6 | <<locked>> | 82% | 55,883 psi | 88% | 2766 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,592 psi | 86% | 2720 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,289 psi | 88% | 2772 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,869 psi | 88% | 2799 fps | 100% |
| Lovex S070 | <<locked>> | 94% | 57,029 psi | 89% | 2838 fps | 99.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,003 psi | 66% | 2621 fps | 98.5% |
| Norma 201 | <<locked>> | 84% | 57,725 psi | 90% | 2782 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,897 psi | 86% | 2730 fps | 100% |
| Norma 203B | <<locked>> | 86% | 57,014 psi | 89% | 2831 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,796 psi | 87% | 2861 fps | 98.6% |
| Norma MRPᴾ | <<locked>> | 100% | 53,940 psi | 85% | 2940 fps | 99.6% |
| Norma URP | <<locked>> | 94% | 55,796 psi | 87% | 2861 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 54,143 psi | 85% | 2805 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 49,777 psi | 78% | 2841 fps | 97% |
| Ramshot Hunter | <<locked>> | 94% | 54,491 psi | 85% | 2861 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,150 psi | 69% | 2720 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,811 psi | 58% | 1755 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,114 psi | 86% | 2792 fps | 99.7% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,129 psi | 86% | 2861 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,042 psi | 86% | 2894 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 56,927 psi | 89% | 2900 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,550 psi | 87% | 2930 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 40,582 psi | 64% | 2733 fps | 97.4% |
| Rottweil R 902 | <<locked>> | 84% | 54,810 psi | 86% | 2736 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,491 psi | 85% | 2782 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 56,434 psi | 88% | 2838 fps | 97.9% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,521 psi | 89% | 2894 fps | 99% |
| Rottweil R 907 | <<locked>> | 92% | 57,696 psi | 90% | 2825 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,869 psi | 88% | 2799 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,883 psi | 88% | 2766 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,289 psi | 88% | 2772 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 57,029 psi | 89% | 2838 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,478 psi | 89% | 2844 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,753 psi | 89% | 2802 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 57,667 psi | 90% | 2815 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,288 psi | 87% | 2664 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 56,028 psi | 88% | 2667 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,709 psi | 87% | 2753 fps | 99.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,028 psi | 88% | 2890 fps | 98.9% |
| Somchem S335 | <<locked>> | 82% | 54,897 psi | 86% | 2664 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,492 psi | 89% | 2785 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,781 psi | 86% | 2779 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 54,520 psi | 85% | 2779 fps | 96.8% |
| Somchem S365 | <<locked>> | 96% | 54,737 psi | 86% | 2858 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,101 psi | 89% | 2867 fps | 99.4% |
| Vihtavuori N133 | <<locked>> | 82% | 55,825 psi | 87% | 2648 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,129 psi | 86% | 2690 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,579 psi | 87% | 2710 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,159 psi | 88% | 2753 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,462 psi | 85% | 2802 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,240 psi | 77% | 2733 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 86% | 57,203 psi | 90% | 2756 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 57,058 psi | 89% | 2861 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,432 psi | 84% | 2861 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,433 psi | 85% | 2930 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,070 psi | 85% | 2772 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,869 psi | 88% | 2877 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,004 psi | 67% | 2844 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,157 psi | 85% | 2776 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,751 psi | 84% | 2812 fps | 98.4% |
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% | 48,820 psi | 77% | 2612 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,224 psi | 74% | 2625 fps | 97.9% |
| Accurate 3100 | <<locked>> | 86% | 31,154 psi | 49% | 2388 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 46,296 psi | 73% | 2621 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,911 psi | 55% | 2490 fps | 98.2% |
| Accurate MAGPRO | <<locked>> | 98% | 49,371 psi | 77% | 2851 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 52,170 psi | 82% | 2743 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,367 psi | 70% | 2605 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 90% | 42,003 psi | 66% | 2644 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 96% | 45,585 psi | 71% | 2740 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,762 psi | 76% | 2812 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,498 psi | 70% | 2625 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,645 psi | 75% | 2690 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,577 psi | 54% | 2507 fps | 98.4% |
| Alliant Reloder-17 | 68.6 gr | 80% | 39,044 psi | 61% | 2628 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 41,524 psi | 65% | 2638 fps | 95.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 38,754 psi | 61% | 2625 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 24,976 psi | 39% | 2264 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 90% | 30,284 psi | 47% | 2431 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 82% | 28,384 psi | 44% | 2421 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,011 psi | 82% | 2762 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 40,785 psi | 64% | 2667 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 44,556 psi | 70% | 2635 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 38,754 psi | 61% | 2625 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 39,465 psi | 62% | 2510 fps | 96.3% |
| Hodgdon H380 | <<locked>> | 80% | 45,092 psi | 71% | 2644 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 37,159 psi | 58% | 2539 fps | 96.3% |
| Hodgdon H4350 | <<locked>> | 80% | 40,277 psi | 63% | 2562 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 96% | 48,820 psi | 77% | 2746 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 96% | 47,848 psi | 75% | 2730 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 52,736 psi | 83% | 2753 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,010 psi | 50% | 2402 fps | 98.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,327 psi | 77% | 2736 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 38,145 psi | 60% | 2677 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 36,129 psi | 57% | 2546 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,905 psi | 42% | 1529 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,546 psi | 79% | 2703 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,359 psi | 84% | 2726 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,630 psi | 73% | 2635 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,863 psi | 77% | 2661 fps | 98.8% |
| IMR 4350 | <<locked>> | 82% | 37,652 psi | 59% | 2493 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,988 psi | 64% | 2543 fps | 97.2% |
| IMR 4831 | <<locked>> | 80% | 33,808 psi | 53% | 2448 fps | 98% |
| IMR 4895 | <<locked>> | 80% | 48,878 psi | 77% | 2720 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 47,718 psi | 75% | 2690 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 98% | 46,485 psi | 73% | 2772 fps | 95.7% |
| Lovex D073.6 | <<locked>> | 80% | 52,170 psi | 82% | 2717 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,300 psi | 80% | 2671 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,586 psi | 73% | 2628 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,363 psi | 60% | 2493 fps | 97.8% |
| Lovex S070 | <<locked>> | 80% | 36,550 psi | 57% | 2474 fps | 96.3% |
| Lovex S071 | <<locked>> | 92% | 32,227 psi | 51% | 2415 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 50,894 psi | 80% | 2687 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,517 psi | 81% | 2684 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,021 psi | 74% | 2677 fps | 100% |
| Norma 204 | <<locked>> | 84% | 39,639 psi | 62% | 2575 fps | 95% |
| Norma MRP | <<locked>> | 88% | 35,476 psi | 56% | 2579 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 35,070 psi | 55% | 2490 fps | 98.1% |
| Ramshot Big Game | <<locked>> | 80% | 47,311 psi | 74% | 2700 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 43,062 psi | 67% | 2713 fps | 95% |
| Ramshot Hunter | <<locked>> | 80% | 33,968 psi | 53% | 2474 fps | 96.1% |
| Ramshot Magnum | <<locked>> | 96% | 38,029 psi | 60% | 2592 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,456 psi | 43% | 1568 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,237 psi | 71% | 2631 fps | 98.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,401 psi | 81% | 2805 fps | 100% |
| ReloadSwiss RS 60 | 68.6 gr | 80% | 41,553 psi | 65% | 2680 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,708 psi | 54% | 2507 fps | 97.9% |
| ReloadSwiss RS 70 | 69.7 gr | 80% | 34,098 psi | 53% | 2516 fps | 97.3% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 35,099 psi | 55% | 2595 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 48,312 psi | 76% | 2638 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,945 psi | 66% | 2582 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 43,511 psi | 68% | 2621 fps | 95% |
| Rottweil R 905 | <<locked>> | 90% | 40,379 psi | 63% | 2615 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 39,465 psi | 62% | 2510 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,363 psi | 60% | 2493 fps | 97.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,170 psi | 82% | 2717 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,586 psi | 73% | 2628 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,550 psi | 57% | 2474 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,149 psi | 68% | 2635 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,069 psi | 83% | 2749 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,604 psi | 79% | 2717 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,837 psi | 81% | 2618 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,642 psi | 68% | 2493 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,449 psi | 59% | 2438 fps | 96.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 39,987 psi | 63% | 2612 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 51,590 psi | 81% | 2621 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,866 psi | 83% | 2733 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,467 psi | 67% | 2582 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 47,616 psi | 75% | 2667 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 31,430 psi | 49% | 2444 fps | 99.6% |
| Somchem S385 | <<locked>> | 86% | 35,897 psi | 56% | 2490 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 52,431 psi | 82% | 2602 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,559 psi | 76% | 2602 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,979 psi | 77% | 2621 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,480 psi | 63% | 2513 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,477 psi | 57% | 2490 fps | 98.4% |
| Vihtavuori N165 | <<locked>> | 92% | 37,739 psi | 59% | 2523 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 47,152 psi | 74% | 2615 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,868 psi | 56% | 2490 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 80% | 27,151 psi | 43% | 2333 fps | 96% |
| Vihtavuori N560 | <<locked>> | 96% | 47,427 psi | 74% | 2808 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,795 psi | 56% | 2464 fps | 99.7% |
| Winchester 760 | <<locked>> | 80% | 37,318 psi | 58% | 2543 fps | 96.3% |
| Winchester StaBALL HD | <<locked>> | 82% | 23,366 psi | 37% | 2280 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,488 psi | 79% | 2720 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 40,495 psi | 63% | 2585 fps | 95.5% |
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 112 powders for 8.5 mm Messner Mag. loaded with the .338 | 225gr | CutEdge LZR. Alliant Reloder-26 delivers the highest muzzle velocity at 2,986 fps; across all powders the maximum-charge window runs from 1,713 fps to 2,986 fps. Accurate 3100 gives the best case fill at 100 %, and 112 of the 112 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 225.0 gr projectile in 0.338" calls for a 1:10.5 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-17, ReloadSwiss RS 60 rank at the top here: for 8.5 mm Messner Mag. with the .338 | 225gr | CutEdge LZR they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, ADI AR 2225, Baschieri & Pellagri 109 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.