Load Specifications
Bullet Manufacturer:Peregrine
Bullet Weight:231 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 | 231gr | Peregrine VLR5 (VLR-5) bullet and 100 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate High Country and ReloadSwiss RS 70.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 55,201 psi | 87% | 2671 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,681 psi | 89% | 2756 fps | 99.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 54,549 psi | 85% | 2802 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 55,651 psi | 87% | 2726 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 56,768 psi | 89% | 2844 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 55,999 psi | 88% | 2953 fps | 98.6% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 56,956 psi | 89% | 2953 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 86% | 56,115 psi | 88% | 2769 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,331 psi | 85% | 2844 fps | 98.9% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,506 psi | 87% | 2897 fps | 98.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 35,375 psi | 55% | 2559 fps | 96.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,637 psi | 87% | 2890 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 54,360 psi | 85% | 2841 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,956 psi | 89% | 2789 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 57,232 psi | 90% | 2812 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 57,696 psi | 90% | 2900 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,419 psi | 87% | 2871 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 57,203 psi | 90% | 2887 fps | 99.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,462 psi | 85% | 2890 fps | 99.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,532 psi | 81% | 2818 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,527 psi | 70% | 2753 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 98% | 55,245 psi | 87% | 2956 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,893 psi | 78% | 2818 fps | 98.4% |
| Bofors RP3 | <<locked>> | 86% | 57,653 psi | 90% | 2802 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,462 psi | 85% | 2890 fps | 99.1% |
| Bofors RP7 | <<locked>> | 90% | 57,000 psi | 89% | 2799 fps | 99.6% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 44,266 psi | 69% | 2694 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 84% | 54,462 psi | 85% | 2772 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 55,405 psi | 87% | 2848 fps | 99.8% |
| Hodgdon H4350 | <<locked>> | 88% | 55,347 psi | 87% | 2812 fps | 99.2% |
| Hodgdon H4831 | <<locked>> | 98% | 55,811 psi | 87% | 2841 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 98% | 54,534 psi | 85% | 2822 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,346 psi | 85% | 2772 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 56,014 psi | 88% | 2805 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 43,714 psi | 69% | 2795 fps | 98% |
| Hodgdon Superformance | <<locked>> | 90% | 55,709 psi | 87% | 2887 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,332 psi | 57% | 1709 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,478 psi | 89% | 2766 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,622 psi | 87% | 2749 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,563 psi | 86% | 2736 fps | 99.7% |
| IMR 4350 | <<locked>> | 92% | 54,679 psi | 86% | 2782 fps | 99.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,448 psi | 87% | 2776 fps | 99.7% |
| IMR 4831 | <<locked>> | 94% | 57,261 psi | 90% | 2838 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 55,071 psi | 86% | 2789 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 57,348 psi | 90% | 2828 fps | 98% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 52,982 psi | 83% | 2871 fps | 97.9% |
| Lovex S060 | <<locked>> | 82% | 57,087 psi | 89% | 2733 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,579 psi | 87% | 2740 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,317 psi | 87% | 2769 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 56,652 psi | 89% | 2812 fps | 99.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,150 psi | 71% | 2657 fps | 99.3% |
| Norma 201 | <<locked>> | 82% | 56,985 psi | 89% | 2749 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,711 psi | 90% | 2740 fps | 100% |
| Norma 203B | <<locked>> | 84% | 56,492 psi | 89% | 2799 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,492 psi | 87% | 2838 fps | 98.9% |
| Norma MRP | <<locked>> | 98% | 54,012 psi | 85% | 2917 fps | 99.8% |
| Norma URP | <<locked>> | 92% | 55,608 psi | 87% | 2831 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 57,421 psi | 90% | 2825 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 53,403 psi | 84% | 2887 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 92% | 54,418 psi | 85% | 2838 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,413 psi | 74% | 2762 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,072 psi | 58% | 1752 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,389 psi | 85% | 2762 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,868 psi | 86% | 2861 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 56,927 psi | 89% | 2874 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,317 psi | 87% | 2904 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 43,598 psi | 68% | 2789 fps | 98.9% |
| Rottweil R 902 | <<locked>> | 84% | 57,551 psi | 90% | 2749 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 57,725 psi | 90% | 2799 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 56,028 psi | 88% | 2815 fps | 98.3% |
| Rottweil R 905 | <<locked>> | 98% | 56,521 psi | 89% | 2874 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 90% | 57,000 psi | 89% | 2799 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,317 psi | 87% | 2769 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 55,579 psi | 87% | 2740 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 56,652 psi | 89% | 2812 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,883 psi | 88% | 2812 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,811 psi | 89% | 2782 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 55,347 psi | 87% | 2635 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,911 psi | 86% | 2723 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,043 psi | 88% | 2871 fps | 99.3% |
| Somchem S335 | <<locked>> | 82% | 57,450 psi | 90% | 2674 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,653 psi | 90% | 2792 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 57,711 psi | 90% | 2808 fps | 97.9% |
| Somchem S365 | <<locked>> | 94% | 54,984 psi | 86% | 2831 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 56,971 psi | 89% | 2844 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 82% | 54,636 psi | 86% | 2661 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,839 psi | 86% | 2677 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,448 psi | 87% | 2720 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 57,696 psi | 90% | 2822 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 52,707 psi | 83% | 2769 fps | 99.1% |
| Vihtavuori N540 | <<locked>> | 84% | 56,463 psi | 88% | 2720 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 56,710 psi | 89% | 2831 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 57,609 psi | 90% | 2890 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 54,360 psi | 85% | 2907 fps | 97.8% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 46,108 psi | 72% | 2756 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 57,638 psi | 90% | 2792 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,608 psi | 87% | 2851 fps | 99.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 46,673 psi | 73% | 2884 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 57,029 psi | 89% | 2789 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 57,319 psi | 90% | 2844 fps | 99.2% |
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% | 51,648 psi | 81% | 2625 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,719 psi | 78% | 2648 fps | 98.8% |
| Accurate 3100 | <<locked>> | 84% | 31,343 psi | 49% | 2372 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 48,979 psi | 77% | 2635 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 37,420 psi | 59% | 2520 fps | 99.1% |
| Accurate High Country | 79.6 gr | 90% | 42,264 psi | 66% | 2710 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 94% | 45,861 psi | 72% | 2766 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 46,601 psi | 73% | 2621 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 39,073 psi | 61% | 2566 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 92% | 42,409 psi | 66% | 2661 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 98% | 33,156 psi | 52% | 2497 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,808 psi | 81% | 2835 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 39,044 psi | 61% | 2562 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,079 psi | 74% | 2644 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 50,314 psi | 79% | 2710 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,637 psi | 57% | 2536 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 41,640 psi | 65% | 2654 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 38,638 psi | 61% | 2556 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 90% | 38,856 psi | 61% | 2608 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,614 psi | 42% | 2297 fps | 97.5% |
| Alliant Reloder-25 | <<locked>> | 88% | 30,211 psi | 47% | 2415 fps | 95.8% |
| Alliant Reloder-26 | 72.8 gr | 80% | 28,268 psi | 44% | 2402 fps | 95.8% |
| Bofors RP15 | <<locked>> | 92% | 38,334 psi | 60% | 2595 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 47,239 psi | 74% | 2654 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 38,856 psi | 61% | 2608 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 41,539 psi | 65% | 2536 fps | 97.4% |
| Hodgdon H1000 | <<locked>> | 98% | 41,365 psi | 65% | 2631 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 47,587 psi | 75% | 2667 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 39,508 psi | 62% | 2569 fps | 97.5% |
| Hodgdon H4350 | <<locked>> | 80% | 42,569 psi | 67% | 2592 fps | 97% |
| Hodgdon H4831 | <<locked>> | 92% | 45,411 psi | 71% | 2671 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 92% | 44,512 psi | 70% | 2651 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,171 psi | 54% | 2428 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 52,286 psi | 82% | 2753 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 35,926 psi | 56% | 2605 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 38,421 psi | 60% | 2582 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,108 psi | 42% | 1526 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,953 psi | 83% | 2717 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,008 psi | 77% | 2651 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 51,184 psi | 80% | 2684 fps | 99.4% |
| IMR 4350 | <<locked>> | 80% | 37,275 psi | 58% | 2467 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,163 psi | 68% | 2569 fps | 98.2% |
| IMR 4831 | <<locked>> | 80% | 35,984 psi | 56% | 2477 fps | 98.9% |
| IMR 4895 | <<locked>> | 80% | 51,634 psi | 81% | 2736 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 44,425 psi | 70% | 2615 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 94% | 43,265 psi | 68% | 2694 fps | 95.5% |
| Lovex S060 | <<locked>> | 80% | 53,592 psi | 84% | 2684 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 49,066 psi | 77% | 2644 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,466 psi | 63% | 2516 fps | 98.7% |
| Lovex S070 | <<locked>> | 80% | 38,609 psi | 61% | 2497 fps | 97.4% |
| Lovex S071 | <<locked>> | 88% | 30,458 psi | 48% | 2349 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 53,417 psi | 84% | 2700 fps | 100% |
| Norma 202 | <<locked>> | 80% | 54,302 psi | 85% | 2697 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,632 psi | 78% | 2697 fps | 100% |
| Norma 204 | <<locked>> | 82% | 39,247 psi | 62% | 2549 fps | 95.5% |
| Norma MRP | <<locked>> | 84% | 32,967 psi | 52% | 2497 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 37,318 psi | 58% | 2516 fps | 99% |
| Ramshot Big Game | <<locked>> | 80% | 50,111 psi | 79% | 2723 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 42,902 psi | 67% | 2697 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 36,245 psi | 57% | 2510 fps | 97.4% |
| Ramshot Magnum | <<locked>> | 92% | 35,404 psi | 55% | 2516 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,688 psi | 43% | 1565 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,732 psi | 75% | 2654 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,338 psi | 69% | 2703 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 37,275 psi | 58% | 2539 fps | 98.9% |
| ReloadSwiss RS 70 | 72.2 gr | 80% | 36,245 psi | 57% | 2552 fps | 98.5% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 35,128 psi | 55% | 2585 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 50,792 psi | 80% | 2654 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,382 psi | 70% | 2602 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 43,265 psi | 68% | 2598 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 86% | 37,695 psi | 59% | 2539 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 41,539 psi | 65% | 2536 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,466 psi | 63% | 2516 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 49,066 psi | 77% | 2644 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,609 psi | 61% | 2497 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,861 psi | 72% | 2657 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 53,345 psi | 84% | 2733 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,934 psi | 72% | 2507 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,537 psi | 62% | 2464 fps | 97.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 37,347 psi | 59% | 2533 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 53,983 psi | 85% | 2628 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,802 psi | 70% | 2602 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 47,195 psi | 74% | 2644 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 33,779 psi | 53% | 2477 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 35,723 psi | 56% | 2467 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 51,285 psi | 80% | 2615 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,416 psi | 81% | 2631 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,757 psi | 67% | 2533 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,827 psi | 61% | 2516 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 88% | 35,186 psi | 55% | 2448 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 49,588 psi | 78% | 2628 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 38,101 psi | 60% | 2516 fps | 99% |
| Vihtavuori N555 | <<locked>> | 80% | 29,298 psi | 46% | 2365 fps | 97.5% |
| Vihtavuori N560 | <<locked>> | 92% | 44,164 psi | 69% | 2726 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 98% | 43,062 psi | 67% | 2700 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,855 psi | 59% | 2487 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 39,668 psi | 62% | 2572 fps | 97.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 23,366 psi | 37% | 2270 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,476 psi | 84% | 2740 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 37,536 psi | 59% | 2503 fps | 95.1% |
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 100 powders for 8.5 mm Messner Mag. loaded with the .338 | 231gr | Peregrine VLR5 (VLR-5). Alliant Reloder-26 delivers the highest muzzle velocity at 2,956 fps; across all powders the maximum-charge window runs from 1,709 fps to 2,956 fps. Accurate 3100 gives the best case fill at 100 %, and 100 of the 100 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 231.0 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. Alliant Reloder-26, Accurate High Country, ReloadSwiss RS 70 rank at the top here: for 8.5 mm Messner Mag. with the .338 | 231gr | Peregrine VLR5 (VLR-5) 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.