Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 130gr | Barnes TSX BT bullet and 50 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% | 56,318 psi | 87% | 3012 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 58,697 psi | 90% | 3179 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 84% | 55,724 psi | 86% | 3120 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 84% | 57,827 psi | 89% | 3110 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 56,449 psi | 87% | 3123 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 94% | 55,695 psi | 86% | 3104 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 98% | 56,275 psi | 87% | 3222 fps | 98.3% |
| ADI AR 2225 | <<locked>> | 96% | 55,071 psi | 85% | 3123 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 57,392 psi | 88% | 3097 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 56,869 psi | 88% | 3117 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 55,172 psi | 85% | 3022 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 55,825 psi | 86% | 3097 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 55,608 psi | 86% | 3100 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 58,305 psi | 90% | 3199 fps | 98.3% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 58,117 psi | 89% | 3182 fps | 97.8% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 56,797 psi | 87% | 3081 fps | 98.3% |
| Bofors RP15 | <<locked>> | 88% | 56,275 psi | 87% | 3104 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 55,550 psi | 85% | 3110 fps | 99.8% |
| Bofors RP5 | <<locked>> | 86% | 56,869 psi | 88% | 3117 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 57,101 psi | 88% | 3127 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 55,259 psi | 85% | 3051 fps | 99.3% |
| Hodgdon H4831 SC | <<locked>> | 86% | 58,001 psi | 89% | 3097 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 57,812 psi | 89% | 3009 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 55,245 psi | 85% | 3186 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,739 psi | 58% | 1998 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 55,535 psi | 85% | 3031 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 86% | 55,129 psi | 85% | 3104 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 57,783 psi | 89% | 3163 fps | 99.9% |
| Lovex S071 | <<locked>> | 92% | 58,392 psi | 90% | 3045 fps | 100% |
| Norma 217 | <<locked>> | 98% | 55,288 psi | 85% | 3123 fps | 100% |
| Norma MRP | <<locked>> | 84% | 57,014 psi | 88% | 3127 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 56,478 psi | 87% | 3130 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 88% | 54,708 psi | 84% | 3051 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,812 psi | 60% | 2044 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 56,217 psi | 87% | 3173 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 55,056 psi | 85% | 3127 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 84% | 58,117 psi | 89% | 3077 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 84% | 57,043 psi | 88% | 3087 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 56,666 psi | 87% | 3081 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 55,724 psi | 86% | 3005 fps | 99.4% |
| Somchem S385 | <<locked>> | 84% | 57,203 psi | 88% | 3051 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 57,392 psi | 88% | 3041 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 56,623 psi | 87% | 3064 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 84% | 56,724 psi | 87% | 3048 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 56,405 psi | 87% | 3133 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 90% | 57,682 psi | 89% | 3127 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 92% | 55,724 psi | 86% | 3136 fps | 98.9% |
| Vihtavuori N570 | <<locked>> | 94% | 57,116 psi | 88% | 3202 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 86% | 55,796 psi | 86% | 3110 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 57,276 psi | 88% | 3054 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% | 45,919 psi | 71% | 2835 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 50,952 psi | 78% | 3041 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 80% | 48,196 psi | 74% | 2979 fps | 97.8% |
| ADI AR 2209 | <<locked>> | 80% | 50,372 psi | 78% | 2982 fps | 99.6% |
| ADI AR 2213 | <<locked>> | 80% | 45,614 psi | 70% | 2920 fps | 98.2% |
| ADI AR 2217 | <<locked>> | 82% | 36,274 psi | 56% | 2703 fps | 95.7% |
| ADI AR 2218 | 84.2 gr | 94% | 48,283 psi | 74% | 3058 fps | 96.1% |
| ADI AR 2225 | <<locked>> | 80% | 31,111 psi | 48% | 2595 fps | 96.5% |
| Alliant Reloder-19 | <<locked>> | 80% | 50,212 psi | 77% | 2969 fps | 99.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 46,267 psi | 71% | 2920 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,962 psi | 69% | 2851 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 39,160 psi | 60% | 2785 fps | 99.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 51,561 psi | 79% | 3035 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 46,282 psi | 71% | 2969 fps | 95.3% |
| Alliant Reloder-50 | <<locked>> | 96% | 49,676 psi | 76% | 3025 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 43,540 psi | 67% | 2825 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 43,105 psi | 66% | 2854 fps | 98.5% |
| Bofors RP30 | <<locked>> | 80% | 36,492 psi | 56% | 2713 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 46,267 psi | 71% | 2920 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 80% | 36,782 psi | 57% | 2717 fps | 96.6% |
| Hodgdon H4831 | <<locked>> | 80% | 48,138 psi | 74% | 2920 fps | 98.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 47,181 psi | 73% | 2904 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 54,201 psi | 83% | 2956 fps | 100% |
| Hodgdon Retumbo | 67.7 gr | 80% | 38,363 psi | 59% | 2835 fps | 98.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,413 psi | 44% | 1791 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,704 psi | 75% | 2907 fps | 98.5% |
| IMR 7828 SSC | <<locked>> | 80% | 44,440 psi | 68% | 2900 fps | 98% |
| IMR 8133 Enduron | <<locked>> | 86% | 35,476 psi | 55% | 2697 fps | 95.1% |
| Lovex S071 | <<locked>> | 80% | 39,363 psi | 61% | 2700 fps | 99.4% |
| Norma 217 | <<locked>> | 82% | 30,951 psi | 48% | 2589 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 49,429 psi | 76% | 2999 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 44,817 psi | 69% | 2913 fps | 98.4% |
| Ramshot Magnum | <<locked>> | 80% | 40,248 psi | 62% | 2779 fps | 98.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,109 psi | 45% | 1831 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 37,724 psi | 58% | 2805 fps | 98.9% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 40,350 psi | 62% | 2828 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 50,836 psi | 78% | 2953 fps | 99.2% |
| Rottweil R 905 | <<locked>> | 80% | 49,893 psi | 77% | 2963 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 49,545 psi | 76% | 2959 fps | 99.6% |
| Somchem S361 | <<locked>> | 80% | 52,040 psi | 80% | 2943 fps | 98.9% |
| Somchem S385 | <<locked>> | 80% | 50,067 psi | 77% | 2933 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 80% | 43,918 psi | 68% | 2802 fps | 99.2% |
| Vihtavuori N170 | <<locked>> | 90% | 52,953 psi | 81% | 2999 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 80% | 49,705 psi | 76% | 2936 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,979 psi | 75% | 2995 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 80% | 40,596 psi | 62% | 2792 fps | 96.5% |
| Vihtavuori N568 | <<locked>> | 84% | 41,495 psi | 64% | 2848 fps | 95.4% |
| Vihtavuori N570 | 79 gr | 90% | 49,356 psi | 76% | 3054 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 44,266 psi | 68% | 2917 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 46,340 psi | 71% | 2861 fps | 99.2% |
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 50 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 130gr | Barnes TSX BT. ADI AR 2218 delivers the highest muzzle velocity at 3,222 fps; across all powders the maximum-charge window runs from 1,998 fps to 3,222 fps. Alliant Reloder-50 gives the best case fill at 100 %, and 50 of the 50 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. Alliant Reloder-50, Hodgdon TrailBoss, IMR 8133 Enduron 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 TSX BT 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.