Load Specifications
Load data in caliber 6.5 x 63 R Messner Mag. with .264 | 150gr | Sierra MatchKing bullet and 59 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, Hodgdon Retumbo 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% | 55,448 psi | 87% | 2822 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 57,246 psi | 90% | 2982 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 54,114 psi | 85% | 2927 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 86% | 56,739 psi | 89% | 2907 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 54,882 psi | 86% | 2923 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 98% | 57,174 psi | 90% | 2956 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 53,432 psi | 84% | 3015 fps | 98.3% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 55,709 psi | 87% | 2979 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 57,043 psi | 89% | 2887 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 56,260 psi | 88% | 2897 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 55,347 psi | 87% | 2917 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 57,174 psi | 90% | 2874 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 57,130 psi | 90% | 2949 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 53,679 psi | 84% | 2910 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 54,708 psi | 86% | 2992 fps | 98.4% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 50,241 psi | 79% | 2913 fps | 97.1% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 55,550 psi | 87% | 2887 fps | 98.5% |
| Bofors RP15 | <<locked>> | 90% | 54,824 psi | 86% | 2907 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 56,797 psi | 89% | 2969 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 55,347 psi | 87% | 2917 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 54,781 psi | 86% | 2920 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 54,143 psi | 85% | 2854 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 88% | 56,797 psi | 89% | 2897 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 56,956 psi | 89% | 2805 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 56,173 psi | 88% | 3041 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,681 psi | 59% | 1808 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 55,347 psi | 87% | 2825 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 56,159 psi | 88% | 2828 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 54,839 psi | 86% | 2838 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 90% | 57,087 psi | 89% | 2966 fps | 100% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 51,039 psi | 80% | 2900 fps | 99.8% |
| Lovex S070 | <<locked>> | 82% | 57,537 psi | 90% | 2851 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 57,058 psi | 89% | 2844 fps | 100% |
| Norma 204 | <<locked>> | 82% | 56,637 psi | 89% | 2887 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 51,851 psi | 81% | 2920 fps | 100% |
| Norma MRP | <<locked>> | 86% | 55,535 psi | 87% | 2936 fps | 100% |
| Norma URP | <<locked>> | 82% | 57,537 psi | 90% | 2864 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 54,389 psi | 85% | 2930 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 56,637 psi | 89% | 2881 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 56,666 psi | 89% | 2917 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,754 psi | 61% | 1854 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 57,014 psi | 89% | 3031 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 56,144 psi | 88% | 2999 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 86% | 57,377 psi | 90% | 2877 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 86% | 55,898 psi | 88% | 2887 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 57,537 psi | 90% | 2851 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 55,506 psi | 87% | 2884 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 54,984 psi | 86% | 2815 fps | 99.6% |
| Somchem S365 | <<locked>> | 82% | 55,259 psi | 87% | 2815 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 56,246 psi | 88% | 2854 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 56,072 psi | 88% | 2841 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 55,100 psi | 86% | 2871 fps | 96.9% |
| Vihtavuori N555 | <<locked>> | 86% | 55,434 psi | 87% | 2851 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 55,042 psi | 86% | 2940 fps | 99.7% |
| Vihtavuori N565 | <<locked>> | 92% | 55,550 psi | 87% | 2930 fps | 99.8% |
| Vihtavuori N568 | <<locked>> | 96% | 56,971 psi | 89% | 3002 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 96% | 54,041 psi | 85% | 2999 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 90% | 56,811 psi | 89% | 2966 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 55,956 psi | 88% | 2854 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% | 42,467 psi | 67% | 2612 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 46,499 psi | 73% | 2799 fps | 99.1% |
| Accurate MAGPRO | <<locked>> | 80% | 43,787 psi | 69% | 2740 fps | 97.7% |
| ADI AR 2209 | <<locked>> | 80% | 46,485 psi | 73% | 2740 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 80% | 41,742 psi | 65% | 2684 fps | 98.2% |
| ADI AR 2217 | <<locked>> | 82% | 33,199 psi | 52% | 2487 fps | 95.7% |
| ADI AR 2218 | <<locked>> | 94% | 43,004 psi | 67% | 2799 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 80% | 28,514 psi | 45% | 2398 fps | 96.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 53,301 psi | 84% | 2835 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,398 psi | 73% | 2733 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 42,453 psi | 67% | 2690 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,220 psi | 65% | 2628 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 35,621 psi | 56% | 2572 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 46,441 psi | 73% | 2795 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 43,918 psi | 69% | 2795 fps | 95.9% |
| Alliant Reloder-50 | <<locked>> | 96% | 43,221 psi | 68% | 2776 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 43,134 psi | 68% | 2657 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 39,537 psi | 62% | 2628 fps | 98.5% |
| Bofors RP30 | <<locked>> | 80% | 33,170 psi | 52% | 2503 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 42,453 psi | 67% | 2690 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 80% | 33,750 psi | 53% | 2500 fps | 96.6% |
| Hodgdon H4831 | <<locked>> | 80% | 44,208 psi | 69% | 2680 fps | 98.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 43,555 psi | 68% | 2667 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,241 psi | 79% | 2713 fps | 100% |
| Hodgdon Retumbo | 55.2 gr | 80% | 34,795 psi | 55% | 2612 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,326 psi | 44% | 1617 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,141 psi | 82% | 2776 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 52,591 psi | 82% | 2776 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,426 psi | 71% | 2671 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 80% | 40,408 psi | 63% | 2664 fps | 97.9% |
| IMR 8133 Enduron | <<locked>> | 86% | 31,778 psi | 50% | 2490 fps | 95.1% |
| Lovex S070 | <<locked>> | 80% | 54,201 psi | 85% | 2802 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 36,651 psi | 57% | 2493 fps | 99.5% |
| Norma 204 | <<locked>> | 80% | 53,026 psi | 83% | 2828 fps | 100% |
| Norma 217 | <<locked>> | 82% | 27,963 psi | 44% | 2402 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 44,991 psi | 71% | 2759 fps | 99.9% |
| Norma URP | <<locked>> | 80% | 54,114 psi | 85% | 2815 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 40,437 psi | 63% | 2677 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 80% | 53,040 psi | 83% | 2828 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,245 psi | 57% | 2556 fps | 98.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,979 psi | 45% | 1654 fps | 100% |
| ReloadSwiss RS 76 | 59 gr | 80% | 33,794 psi | 53% | 2582 fps | 98.8% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 35,795 psi | 56% | 2605 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 80% | 47,297 psi | 74% | 2710 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 80% | 46,064 psi | 72% | 2723 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 80% | 54,201 psi | 85% | 2802 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 45,730 psi | 72% | 2720 fps | 99.6% |
| Somchem S361 | <<locked>> | 80% | 48,269 psi | 76% | 2703 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 51,866 psi | 81% | 2769 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,441 psi | 73% | 2697 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 40,553 psi | 64% | 2579 fps | 99.2% |
| Vihtavuori N170 | <<locked>> | 90% | 48,109 psi | 75% | 2749 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 80% | 45,759 psi | 72% | 2700 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 44,730 psi | 70% | 2756 fps | 98.4% |
| Vihtavuori N565 | <<locked>> | 80% | 37,159 psi | 58% | 2579 fps | 96.6% |
| Vihtavuori N568 | <<locked>> | 84% | 37,086 psi | 58% | 2621 fps | 95.2% |
| Vihtavuori N570 | 64.4 gr | 90% | 43,598 psi | 68% | 2802 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 39,189 psi | 61% | 2690 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 42,612 psi | 67% | 2628 fps | 99.1% |
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 59 powders for 6.5 x 63 R Messner Mag. loaded with the .264 | 150gr | Sierra MatchKing. Hodgdon Retumbo delivers the highest muzzle velocity at 3,041 fps; across all powders the maximum-charge window runs from 1,808 fps to 3,041 fps. ADI AR 2218 gives the best case fill at 100 %, and 59 of the 59 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 150.0 gr projectile in 0.264" calls for a 1:8.0 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. Vihtavuori N570, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for 6.5 x 63 R Messner Mag. with the .264 | 150gr | Sierra MatchKing 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.