Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 130gr | Sierra Tipped GameKing bullet and 49 powders. The key underlying parameters are shown in the table above.
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% | 57,798 psi | 89% | 3031 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 56,057 psi | 86% | 3133 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 84% | 57,000 psi | 88% | 3143 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 82% | 54,984 psi | 85% | 3061 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 86% | 57,522 psi | 89% | 3140 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 94% | 56,898 psi | 88% | 3123 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 98% | 57,580 psi | 89% | 3248 fps | 98.5% |
| ADI AR 2225 | <<locked>> | 96% | 56,405 psi | 87% | 3143 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 58,204 psi | 90% | 3110 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 58,059 psi | 89% | 3133 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 56,376 psi | 87% | 3038 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 57,058 psi | 88% | 3114 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 57,014 psi | 88% | 3123 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 55,303 psi | 85% | 3146 fps | 97.8% |
| Alliant Reloder-50 | <<locked>> | 98% | 55,390 psi | 85% | 3136 fps | 97.3% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 57,696 psi | 89% | 3094 fps | 98.4% |
| Bofors RP15 | <<locked>> | 88% | 57,435 psi | 88% | 3123 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 56,942 psi | 88% | 3133 fps | 99.9% |
| Bofors RP5 | <<locked>> | 86% | 58,059 psi | 89% | 3133 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 58,276 psi | 90% | 3143 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 56,275 psi | 87% | 3068 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 84% | 55,201 psi | 85% | 3051 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 90% | 56,521 psi | 87% | 3205 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,927 psi | 58% | 2001 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 56,449 psi | 87% | 3045 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 86% | 56,014 psi | 86% | 3120 fps | 99.7% |
| IMR 8133 Enduron | <<locked>> | 98% | 55,245 psi | 85% | 3120 fps | 99.8% |
| Lovex S071 | <<locked>> | 90% | 56,202 psi | 86% | 3009 fps | 100% |
| Norma 217 | <<locked>> | 98% | 56,840 psi | 87% | 3146 fps | 100% |
| Norma MRP | <<locked>> | 84% | 58,291 psi | 90% | 3146 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 57,508 psi | 89% | 3146 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 88% | 56,028 psi | 86% | 3071 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,870 psi | 60% | 2044 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 57,392 psi | 88% | 3189 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 56,565 psi | 87% | 3153 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 82% | 55,332 psi | 85% | 3028 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 84% | 58,146 psi | 89% | 3100 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 57,769 psi | 89% | 3100 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 56,753 psi | 87% | 3022 fps | 99.5% |
| Somchem S385 | <<locked>> | 84% | 58,407 psi | 90% | 3068 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 58,537 psi | 90% | 3058 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 57,885 psi | 89% | 3081 fps | 96.9% |
| Vihtavuori N555 | <<locked>> | 84% | 58,102 psi | 89% | 3068 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 57,551 psi | 89% | 3150 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 88% | 55,085 psi | 85% | 3084 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 92% | 56,884 psi | 88% | 3156 fps | 99.1% |
| Vihtavuori N570 | <<locked>> | 94% | 58,508 psi | 90% | 3225 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 86% | 57,305 psi | 88% | 3127 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 58,421 psi | 90% | 3068 fps | 100% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 47,369 psi | 73% | 2861 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 52,199 psi | 80% | 3064 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 80% | 49,429 psi | 76% | 3002 fps | 98.1% |
| ADI AR 2209 | <<locked>> | 80% | 51,343 psi | 79% | 2995 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 46,644 psi | 72% | 2940 fps | 98.5% |
| ADI AR 2217 | <<locked>> | 80% | 34,911 psi | 54% | 2664 fps | 95.2% |
| ADI AR 2218 | <<locked>> | 92% | 45,992 psi | 71% | 3009 fps | 95.3% |
| ADI AR 2225 | <<locked>> | 80% | 32,271 psi | 50% | 2631 fps | 97.2% |
| Alliant Reloder-19 | <<locked>> | 80% | 51,213 psi | 79% | 2989 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 47,413 psi | 73% | 2940 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 46,151 psi | 71% | 2871 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 40,335 psi | 62% | 2812 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 52,968 psi | 82% | 3054 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 47,674 psi | 73% | 2999 fps | 95.8% |
| Alliant Reloder-50 | <<locked>> | 94% | 47,776 psi | 74% | 2989 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 44,367 psi | 68% | 2841 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 44,251 psi | 68% | 2874 fps | 98.8% |
| Bofors RP30 | <<locked>> | 80% | 37,739 psi | 58% | 2743 fps | 96.4% |
| Bofors RP5 | <<locked>> | 80% | 47,413 psi | 73% | 2940 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 80% | 37,884 psi | 58% | 2743 fps | 97.1% |
| Hodgdon H4831 | <<locked>> | 80% | 49,168 psi | 76% | 2940 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 48,196 psi | 74% | 2920 fps | 98.3% |
| Hodgdon Retumbo | <<locked>> | 80% | 39,552 psi | 61% | 2864 fps | 98.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,442 psi | 44% | 1788 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 49,617 psi | 76% | 2923 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 80% | 45,527 psi | 70% | 2923 fps | 98.3% |
| IMR 8133 Enduron | <<locked>> | 86% | 36,782 psi | 57% | 2733 fps | 95.8% |
| Lovex S071 | <<locked>> | 80% | 40,785 psi | 63% | 2730 fps | 99.6% |
| Norma 217 | <<locked>> | 82% | 32,314 psi | 50% | 2628 fps | 96.1% |
| Norma MRP | <<locked>> | 80% | 50,662 psi | 78% | 3018 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 46,021 psi | 71% | 2936 fps | 98.6% |
| Ramshot Magnum | <<locked>> | 80% | 41,524 psi | 64% | 2805 fps | 99% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,327 psi | 45% | 1834 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 39,001 psi | 60% | 2835 fps | 99.3% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 41,785 psi | 64% | 2861 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 51,764 psi | 80% | 2966 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 80% | 51,010 psi | 79% | 2982 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 50,662 psi | 78% | 2976 fps | 99.7% |
| Somchem S361 | <<locked>> | 80% | 53,055 psi | 82% | 2959 fps | 99.1% |
| Somchem S385 | <<locked>> | 80% | 51,256 psi | 79% | 2953 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 45,005 psi | 69% | 2825 fps | 99.4% |
| Vihtavuori N170 | <<locked>> | 88% | 50,589 psi | 78% | 2953 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 80% | 51,053 psi | 79% | 2956 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 50,111 psi | 77% | 3015 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 80% | 41,930 psi | 65% | 2822 fps | 97% |
| Vihtavuori N568 | <<locked>> | 84% | 42,830 psi | 66% | 2877 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 88% | 47,094 psi | 72% | 3005 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 45,687 psi | 70% | 2943 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 47,442 psi | 73% | 2881 fps | 99.4% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 58 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 130gr | Sierra Tipped GameKing. ADI AR 2218 delivers the highest muzzle velocity at 3,248 fps; across all powders the maximum-charge window runs from 2,001 fps to 3,248 fps. Accurate 8700 gives the best case fill at 100 %, and 58 of the 58 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. Accurate 8700, Hodgdon TrailBoss, Hodgdon US 869 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. As outliers, Hodgdon US 869, Lovex D100, Ramshot LRT burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.