Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 130gr | Barnes X S bullet and 47 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>> | 84% | 58,653 psi | 90% | 3031 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 53,809 psi | 83% | 3058 fps | 97% |
| Accurate MAGPRO | <<locked>> | 82% | 57,188 psi | 88% | 3133 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 82% | 58,160 psi | 90% | 3104 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 57,276 psi | 88% | 3127 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 92% | 56,768 psi | 87% | 3110 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 96% | 57,421 psi | 88% | 3235 fps | 98.5% |
| ADI AR 2225 | <<locked>> | 94% | 56,811 psi | 87% | 3140 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 57,899 psi | 89% | 3094 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 58,160 psi | 90% | 3123 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,724 psi | 87% | 3031 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 57,334 psi | 88% | 3107 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 55,883 psi | 86% | 3146 fps | 97.9% |
| Alliant Reloder-50 | <<locked>> | 96% | 56,855 psi | 88% | 3153 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 56,855 psi | 88% | 3074 fps | 98.3% |
| Bofors RP15 | <<locked>> | 86% | 57,609 psi | 89% | 3114 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 57,537 psi | 89% | 3130 fps | 99.9% |
| Bofors RP5 | <<locked>> | 84% | 58,160 psi | 90% | 3123 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 58,102 psi | 89% | 3130 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,825 psi | 86% | 3048 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 84% | 58,653 psi | 90% | 3094 fps | 99.7% |
| Hodgdon Retumbo | <<locked>> | 88% | 56,869 psi | 88% | 3202 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,174 psi | 59% | 2001 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,796 psi | 86% | 3022 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 84% | 55,999 psi | 86% | 3110 fps | 99.8% |
| IMR 8133 Enduron | <<locked>> | 96% | 56,260 psi | 87% | 3127 fps | 99.9% |
| Lovex S071 | <<locked>> | 88% | 57,101 psi | 88% | 3009 fps | 100% |
| Norma 217 | <<locked>> | 96% | 57,841 psi | 89% | 3153 fps | 100% |
| Norma MRP | <<locked>> | 82% | 58,378 psi | 90% | 3140 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 57,638 psi | 89% | 3140 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 86% | 56,275 psi | 87% | 3064 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,378 psi | 61% | 2051 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 57,711 psi | 89% | 3186 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 57,276 psi | 88% | 3156 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 82% | 58,349 psi | 90% | 3071 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 82% | 58,131 psi | 89% | 3091 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 55,941 psi | 86% | 3071 fps | 97.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 57,769 psi | 89% | 3087 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 58,581 psi | 90% | 3058 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 58,494 psi | 90% | 3048 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 58,262 psi | 90% | 3077 fps | 97% |
| Vihtavuori N560 | <<locked>> | 82% | 57,464 psi | 88% | 3136 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 86% | 55,941 psi | 86% | 3087 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 90% | 57,493 psi | 88% | 3156 fps | 99.2% |
| Vihtavuori N570 | <<locked>> | 90% | 55,158 psi | 85% | 3156 fps | 97.4% |
| Winchester StaBALL HD | <<locked>> | 84% | 57,943 psi | 89% | 3130 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 58,030 psi | 89% | 3051 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% | 51,663 psi | 80% | 2920 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 46,818 psi | 72% | 2923 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 80% | 53,490 psi | 82% | 3068 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 80% | 54,708 psi | 84% | 3045 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 50,198 psi | 77% | 2999 fps | 99.1% |
| ADI AR 2217 | <<locked>> | 80% | 38,261 psi | 59% | 2740 fps | 96.7% |
| ADI AR 2218 | 80.9 gr | 90% | 46,514 psi | 72% | 3012 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 80% | 35,839 psi | 55% | 2720 fps | 98.7% |
| Alliant Reloder-19 | <<locked>> | 80% | 54,418 psi | 84% | 3035 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 51,227 psi | 79% | 3005 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 50,111 psi | 77% | 2927 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 44,237 psi | 68% | 2884 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 45,440 psi | 70% | 2943 fps | 95.2% |
| Alliant Reloder-50 | <<locked>> | 92% | 49,617 psi | 76% | 3018 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 47,224 psi | 73% | 2890 fps | 96.2% |
| Bofors RP15 | <<locked>> | 80% | 47,834 psi | 74% | 2936 fps | 99.4% |
| Bofors RP30 | <<locked>> | 80% | 41,727 psi | 64% | 2828 fps | 97.8% |
| Bofors RP5 | <<locked>> | 80% | 51,227 psi | 79% | 3005 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 80% | 41,437 psi | 64% | 2818 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 80% | 52,373 psi | 81% | 2989 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,561 psi | 79% | 2972 fps | 98.9% |
| Hodgdon Retumbo | 67.9 gr | 80% | 43,323 psi | 67% | 2943 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,921 psi | 45% | 1795 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,649 psi | 81% | 2969 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 80% | 49,008 psi | 75% | 2982 fps | 99% |
| IMR 8133 Enduron | <<locked>> | 82% | 36,013 psi | 55% | 2703 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 45,165 psi | 70% | 2805 fps | 100% |
| Norma 217 | <<locked>> | 80% | 34,360 psi | 53% | 2677 fps | 97.3% |
| Norma MRP | <<locked>> | 80% | 54,752 psi | 84% | 3077 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 50,038 psi | 77% | 3009 fps | 99.4% |
| Ramshot Magnum | <<locked>> | 80% | 45,658 psi | 70% | 2877 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,718 psi | 46% | 1837 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 43,236 psi | 67% | 2927 fps | 99.9% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 40,335 psi | 62% | 2815 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 54,998 psi | 85% | 3015 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 80% | 54,520 psi | 84% | 3031 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 48,994 psi | 75% | 2943 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 54,186 psi | 83% | 3028 fps | 99.9% |
| Somchem S385 | <<locked>> | 80% | 55,114 psi | 85% | 3002 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 48,428 psi | 75% | 2877 fps | 99.8% |
| Vihtavuori N170 | <<locked>> | 86% | 51,358 psi | 79% | 2956 fps | 95.5% |
| Vihtavuori N560 | <<locked>> | 80% | 53,911 psi | 83% | 3077 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 80% | 46,195 psi | 71% | 2900 fps | 98.2% |
| Vihtavuori N568 | <<locked>> | 80% | 41,002 psi | 63% | 2825 fps | 95.4% |
| Vihtavuori N570 | 75.8 gr | 86% | 48,211 psi | 74% | 3022 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 50,270 psi | 77% | 3009 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 51,024 psi | 79% | 2933 fps | 99.7% |
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 47 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 130gr | Barnes X S. ADI AR 2218 delivers the highest muzzle velocity at 3,235 fps; across all powders the maximum-charge window runs from 2,001 fps to 3,235 fps. Accurate 8700 gives the best case fill at 100 %, and 47 of the 47 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 130.0 gr projectile in 0.264" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, 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 | Barnes X S 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.