Load Specifications
Load data in caliber 6.5 x 63 R Messner Mag. with .264 | 140gr | Sierra GameKing bullet and 64 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Vihtavuori N570 and ReloadSwiss RS 76.
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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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 88% | 54,650 psi | 86% | 2907 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 56,260 psi | 88% | 3064 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 88% | 57,145 psi | 90% | 3071 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 86% | 55,883 psi | 88% | 2992 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 53,998 psi | 85% | 3005 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 98% | 56,275 psi | 88% | 3038 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 52,504 psi | 82% | 3084 fps | 97.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,781 psi | 86% | 3061 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 56,014 psi | 88% | 2989 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 56,014 psi | 88% | 2989 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 56,260 psi | 88% | 2979 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 55,405 psi | 87% | 2982 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 54,476 psi | 85% | 2999 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 56,347 psi | 88% | 2963 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 56,405 psi | 88% | 3038 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 56,869 psi | 89% | 3054 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 53,925 psi | 85% | 3071 fps | 97.8% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 49,327 psi | 77% | 2979 fps | 96.2% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 54,926 psi | 86% | 2969 fps | 98% |
| Bofors RP15 | <<locked>> | 92% | 57,537 psi | 90% | 3048 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 56,202 psi | 88% | 3054 fps | 99.9% |
| Bofors RP5 | <<locked>> | 88% | 54,476 psi | 85% | 2999 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 54,056 psi | 85% | 3002 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 57,058 psi | 89% | 2995 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 88% | 55,999 psi | 88% | 2979 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 56,405 psi | 88% | 2900 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 55,332 psi | 87% | 3127 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,666 psi | 59% | 1883 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 54,839 psi | 86% | 2913 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 55,303 psi | 87% | 2913 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 57,566 psi | 90% | 2976 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 90% | 56,362 psi | 88% | 3051 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 50,299 psi | 79% | 2976 fps | 99.5% |
| Lovex S070 | <<locked>> | 82% | 56,826 psi | 89% | 2940 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 56,217 psi | 88% | 2930 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,869 psi | 88% | 2972 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 50,995 psi | 80% | 3002 fps | 100% |
| Norma MRP | <<locked>> | 86% | 54,592 psi | 86% | 3018 fps | 100% |
| Norma URP | <<locked>> | 82% | 56,739 psi | 89% | 2956 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 57,421 psi | 90% | 3071 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 55,854 psi | 88% | 2969 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 55,680 psi | 87% | 2999 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,682 psi | 61% | 1929 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 57,609 psi | 90% | 3031 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 55,927 psi | 88% | 3114 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 55,216 psi | 87% | 3074 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 86% | 56,608 psi | 89% | 2963 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 86% | 55,274 psi | 87% | 2976 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 56,826 psi | 89% | 2940 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 57,392 psi | 90% | 2890 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 54,882 psi | 86% | 2972 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 54,259 psi | 85% | 2894 fps | 99.3% |
| Somchem S365 | <<locked>> | 82% | 54,636 psi | 86% | 2910 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 55,579 psi | 87% | 2943 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 55,448 psi | 87% | 2930 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 54,244 psi | 85% | 2943 fps | 96.2% |
| Vihtavuori N550 | <<locked>> | 82% | 57,725 psi | 90% | 2953 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 54,621 psi | 86% | 2940 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 54,099 psi | 85% | 3018 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 92% | 54,839 psi | 86% | 3012 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 96% | 56,028 psi | 88% | 3081 fps | 99.2% |
| Vihtavuori N570 | <<locked>> | 98% | 57,101 psi | 89% | 3143 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 90% | 56,014 psi | 88% | 3058 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 55,376 psi | 87% | 2940 fps | 100% |
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 3100 | <<locked>> | 80% | 41,814 psi | 66% | 2687 fps | 99.9% |
| Accurate High Country | <<locked>> | 80% | 45,600 psi | 71% | 2871 fps | 98.6% |
| Accurate MAGPRO | <<locked>> | 80% | 43,018 psi | 67% | 2808 fps | 96.9% |
| ADI AR 2209 | <<locked>> | 80% | 45,614 psi | 71% | 2815 fps | 99.2% |
| ADI AR 2213 | <<locked>> | 80% | 41,060 psi | 64% | 2756 fps | 97.4% |
| ADI AR 2217 | <<locked>> | 84% | 35,070 psi | 55% | 2612 fps | 95.7% |
| ADI AR 2218 | <<locked>> | 96% | 45,469 psi | 71% | 2933 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 80% | 28,036 psi | 44% | 2454 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 46,209 psi | 72% | 2818 fps | 99.3% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 46,209 psi | 72% | 2818 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,692 psi | 83% | 2927 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,774 psi | 72% | 2812 fps | 99.2% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,742 psi | 65% | 2762 fps | 98.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,437 psi | 63% | 2703 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,882 psi | 55% | 2638 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,484 psi | 71% | 2871 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 46,398 psi | 73% | 2930 fps | 96% |
| Alliant Reloder-50 | <<locked>> | 98% | 45,876 psi | 72% | 2913 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 45,484 psi | 71% | 2789 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 38,754 psi | 61% | 2694 fps | 97.8% |
| Bofors RP30 | <<locked>> | 82% | 34,867 psi | 55% | 2628 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 41,742 psi | 65% | 2762 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 80% | 33,185 psi | 52% | 2562 fps | 95.6% |
| Hodgdon H4831 | <<locked>> | 80% | 43,511 psi | 68% | 2753 fps | 97.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,902 psi | 67% | 2743 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,501 psi | 78% | 2799 fps | 100% |
| Hodgdon Retumbo | 57.3 gr | 80% | 34,185 psi | 54% | 2674 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,268 psi | 44% | 1683 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,300 psi | 80% | 2858 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 51,909 psi | 81% | 2864 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,672 psi | 70% | 2746 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 80% | 39,755 psi | 62% | 2736 fps | 97.1% |
| IMR 8133 Enduron | <<locked>> | 88% | 33,388 psi | 52% | 2612 fps | 95.1% |
| Lovex S070 | <<locked>> | 80% | 53,388 psi | 84% | 2887 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 36,071 psi | 57% | 2562 fps | 99.1% |
| Norma 204 | <<locked>> | 80% | 52,141 psi | 82% | 2910 fps | 99.8% |
| Norma 217 | <<locked>> | 84% | 29,312 psi | 46% | 2513 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 44,106 psi | 69% | 2835 fps | 99.7% |
| Norma URP | <<locked>> | 80% | 53,214 psi | 83% | 2900 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 39,581 psi | 62% | 2746 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 80% | 52,199 psi | 82% | 2910 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,578 psi | 56% | 2621 fps | 97.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,066 psi | 46% | 1726 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 53,664 psi | 84% | 2972 fps | 100% |
| ReloadSwiss RS 76 | 61.3 gr | 80% | 33,286 psi | 52% | 2648 fps | 98.1% |
| ReloadSwiss RS 80 | <<locked>> | 86% | 37,811 psi | 59% | 2733 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 46,760 psi | 73% | 2792 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 80% | 45,208 psi | 71% | 2799 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 80% | 53,388 psi | 84% | 2887 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 53,896 psi | 84% | 2841 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,875 psi | 70% | 2792 fps | 99.2% |
| Somchem S361 | <<locked>> | 80% | 47,587 psi | 75% | 2779 fps | 98.3% |
| Somchem S365 | <<locked>> | 80% | 50,908 psi | 80% | 2854 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,745 psi | 72% | 2776 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 80% | 39,958 psi | 63% | 2651 fps | 98.7% |
| Vihtavuori N170 | <<locked>> | 92% | 50,894 psi | 80% | 2884 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 54,041 psi | 85% | 2897 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 44,918 psi | 70% | 2779 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,874 psi | 69% | 2825 fps | 97.7% |
| Vihtavuori N565 | <<locked>> | 80% | 36,448 psi | 57% | 2644 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 86% | 39,160 psi | 61% | 2753 fps | 95.2% |
| Vihtavuori N570 | 68.4 gr | 92% | 46,166 psi | 72% | 2940 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 38,203 psi | 60% | 2759 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,105 psi | 66% | 2703 fps | 98.7% |
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 64 powders for 6.5 x 63 R Messner Mag. loaded with the .264 | 140gr | Sierra GameKing. Vihtavuori N570 delivers the highest muzzle velocity at 3,143 fps; across all powders the maximum-charge window runs from 1,883 fps to 3,143 fps. ADI AR 2218 gives the best case fill at 100 %, and 64 of the 64 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.264" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Alliant Reloder-50 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. Hodgdon Retumbo, Vihtavuori N570, ReloadSwiss RS 76 rank at the top here: for 6.5 x 63 R Messner Mag. with the .264 | 140gr | Sierra GameKing 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.