Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 130gr | Sierra Tipped MatchKing bullet and 49 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ADI AR 2218 and Vihtavuori N570.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 86% | 58,073 psi | 89% | 3035 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 56,115 psi | 86% | 3133 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 84% | 57,014 psi | 88% | 3143 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 82% | 55,013 psi | 85% | 3061 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 86% | 57,580 psi | 89% | 3140 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 94% | 56,913 psi | 88% | 3120 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 98% | 57,580 psi | 89% | 3248 fps | 98.5% |
| ADI AR 2225 | <<locked>> | 96% | 56,449 psi | 87% | 3143 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 58,450 psi | 90% | 3114 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 58,073 psi | 89% | 3133 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 56,449 psi | 87% | 3038 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 57,087 psi | 88% | 3114 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 57,319 psi | 88% | 3127 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 55,521 psi | 85% | 3150 fps | 97.8% |
| Alliant Reloder-50 | <<locked>> | 98% | 55,637 psi | 86% | 3140 fps | 97.4% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 57,914 psi | 89% | 3100 fps | 98.5% |
| Bofors RP15 | <<locked>> | 88% | 57,493 psi | 88% | 3123 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 56,971 psi | 88% | 3133 fps | 99.9% |
| Bofors RP5 | <<locked>> | 86% | 58,073 psi | 89% | 3133 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 58,581 psi | 90% | 3146 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 56,333 psi | 87% | 3068 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 84% | 55,230 psi | 85% | 3051 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 90% | 56,565 psi | 87% | 3205 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,855 psi | 58% | 1998 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 56,507 psi | 87% | 3045 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 86% | 56,275 psi | 87% | 3123 fps | 99.8% |
| IMR 8133 Enduron | <<locked>> | 98% | 55,521 psi | 85% | 3123 fps | 99.8% |
| Lovex S071 | <<locked>> | 90% | 56,260 psi | 87% | 3009 fps | 100% |
| Norma 217 | <<locked>> | 98% | 56,884 psi | 88% | 3146 fps | 100% |
| Norma MRP | <<locked>> | 84% | 58,320 psi | 90% | 3150 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 57,769 psi | 89% | 3150 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 88% | 56,043 psi | 86% | 3071 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,972 psi | 60% | 2047 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 57,653 psi | 89% | 3192 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 56,826 psi | 87% | 3159 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 82% | 55,376 psi | 85% | 3031 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 84% | 58,218 psi | 90% | 3104 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 57,841 psi | 89% | 3100 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 56,753 psi | 87% | 3022 fps | 99.5% |
| Somchem S385 | <<locked>> | 84% | 58,436 psi | 90% | 3071 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 58,595 psi | 90% | 3058 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 58,146 psi | 89% | 3087 fps | 97% |
| Vihtavuori N555 | <<locked>> | 84% | 58,175 psi | 90% | 3068 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 57,609 psi | 89% | 3153 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 88% | 55,332 psi | 85% | 3091 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 92% | 57,130 psi | 88% | 3163 fps | 99.1% |
| Vihtavuori N570 | <<locked>> | 94% | 58,566 psi | 90% | 3228 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 86% | 57,363 psi | 88% | 3130 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 58,465 psi | 90% | 3071 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 47,413 psi | 73% | 2861 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 52,228 psi | 80% | 3064 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 80% | 49,676 psi | 76% | 3005 fps | 98.1% |
| ADI AR 2209 | <<locked>> | 80% | 51,387 psi | 79% | 2995 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 46,702 psi | 72% | 2940 fps | 98.5% |
| ADI AR 2217 | <<locked>> | 80% | 34,983 psi | 54% | 2664 fps | 95.2% |
| ADI AR 2218 | 82.5 gr | 92% | 46,180 psi | 71% | 3012 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 80% | 32,300 psi | 50% | 2631 fps | 97.2% |
| Alliant Reloder-19 | <<locked>> | 80% | 51,256 psi | 79% | 2989 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 47,456 psi | 73% | 2943 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 46,224 psi | 71% | 2871 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 40,379 psi | 62% | 2812 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 53,258 psi | 82% | 3061 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 47,703 psi | 73% | 2999 fps | 95.8% |
| Alliant Reloder-50 | <<locked>> | 94% | 47,805 psi | 74% | 2989 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 44,599 psi | 69% | 2844 fps | 95.4% |
| Bofors RP15 | <<locked>> | 80% | 44,295 psi | 68% | 2877 fps | 98.8% |
| Bofors RP30 | <<locked>> | 80% | 37,811 psi | 58% | 2743 fps | 96.4% |
| Bofors RP5 | <<locked>> | 80% | 47,456 psi | 73% | 2943 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 80% | 38,072 psi | 59% | 2749 fps | 97.2% |
| Hodgdon H4831 | <<locked>> | 80% | 49,211 psi | 76% | 2940 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 48,225 psi | 74% | 2920 fps | 98.3% |
| Hodgdon Retumbo | 67.7 gr | 80% | 39,581 psi | 61% | 2867 fps | 98.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,529 psi | 44% | 1791 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 49,647 psi | 76% | 2923 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 80% | 45,600 psi | 70% | 2923 fps | 98.3% |
| IMR 8133 Enduron | <<locked>> | 86% | 36,840 psi | 57% | 2733 fps | 95.8% |
| Lovex S071 | <<locked>> | 80% | 40,828 psi | 63% | 2730 fps | 99.6% |
| Norma 217 | <<locked>> | 80% | 30,197 psi | 46% | 2566 fps | 95% |
| Norma MRP | <<locked>> | 80% | 50,720 psi | 78% | 3018 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 46,079 psi | 71% | 2940 fps | 98.7% |
| Ramshot Magnum | <<locked>> | 80% | 41,553 psi | 64% | 2805 fps | 99% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,269 psi | 45% | 1834 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 39,030 psi | 60% | 2838 fps | 99.3% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 38,812 psi | 60% | 2789 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 52,025 psi | 80% | 2972 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 80% | 51,053 psi | 79% | 2982 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 50,720 psi | 78% | 2976 fps | 99.7% |
| Somchem S361 | <<locked>> | 80% | 53,084 psi | 82% | 2959 fps | 99.1% |
| Somchem S385 | <<locked>> | 80% | 51,300 psi | 79% | 2953 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 45,063 psi | 69% | 2825 fps | 99.4% |
| Vihtavuori N170 | <<locked>> | 88% | 50,807 psi | 78% | 2956 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 80% | 51,097 psi | 79% | 2956 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 50,183 psi | 77% | 3018 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 80% | 41,989 psi | 65% | 2822 fps | 97% |
| Vihtavuori N568 | <<locked>> | 84% | 42,859 psi | 66% | 2881 fps | 95.9% |
| Vihtavuori N570 | 77.3 gr | 88% | 47,326 psi | 73% | 3009 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 45,803 psi | 70% | 2943 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 47,456 psi | 73% | 2881 fps | 99.4% |
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 49 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 130gr | Sierra Tipped MatchKing. ADI AR 2218 delivers the highest muzzle velocity at 3,248 fps; across all powders the maximum-charge window runs from 1,998 fps to 3,248 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 49 of the 49 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 130.0 gr projectile in 0.264" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14 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, ADI AR 2218, Vihtavuori N570 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 130gr | Sierra Tipped 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.