Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 128gr | Peregrine VLR-5 bullet and 51 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 86% | 55,288 psi | 85% | 3018 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 57,537 psi | 89% | 3182 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 86% | 58,784 psi | 90% | 3192 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 84% | 56,797 psi | 87% | 3114 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 55,390 psi | 85% | 3127 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 96% | 58,523 psi | 90% | 3169 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 54,969 psi | 85% | 3219 fps | 97.8% |
| ADI AR 2225 | <<locked>> | 98% | 57,711 psi | 89% | 3189 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 56,391 psi | 87% | 3100 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 55,782 psi | 86% | 3120 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 57,740 psi | 89% | 3084 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 58,436 psi | 90% | 3159 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 58,711 psi | 90% | 3169 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 56,898 psi | 88% | 3196 fps | 97.9% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 56,449 psi | 87% | 3176 fps | 97.3% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 55,941 psi | 86% | 3087 fps | 98% |
| Bofors RP15 | <<locked>> | 88% | 55,230 psi | 85% | 3107 fps | 99.9% |
| Bofors RP30 | <<locked>> | 94% | 58,160 psi | 90% | 3176 fps | 99.9% |
| Bofors RP5 | <<locked>> | 86% | 55,782 psi | 86% | 3120 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 55,970 psi | 86% | 3127 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 58,160 psi | 90% | 3123 fps | 99.5% |
| Hodgdon H4831 SC | <<locked>> | 86% | 57,000 psi | 88% | 3100 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 56,971 psi | 88% | 3018 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 58,088 psi | 89% | 3255 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,681 psi | 58% | 2008 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 58,653 psi | 90% | 3087 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 58,117 psi | 89% | 3094 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 88% | 57,769 psi | 89% | 3173 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 56,362 psi | 87% | 3163 fps | 99.8% |
| Lovex S071 | <<locked>> | 92% | 57,348 psi | 88% | 3051 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 57,667 psi | 89% | 3182 fps | 100% |
| Norma MRP | <<locked>> | 84% | 55,912 psi | 86% | 3133 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 55,042 psi | 85% | 3130 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 90% | 57,638 psi | 89% | 3120 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,754 psi | 60% | 2057 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 54,665 psi | 84% | 3173 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 58,189 psi | 90% | 3205 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 84% | 57,145 psi | 88% | 3084 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 84% | 55,999 psi | 86% | 3091 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 55,622 psi | 86% | 3087 fps | 99.9% |
| Somchem S361 | <<locked>> | 84% | 58,479 psi | 90% | 3071 fps | 99.6% |
| Somchem S385 | <<locked>> | 84% | 56,217 psi | 87% | 3058 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 56,420 psi | 87% | 3048 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 55,666 psi | 86% | 3064 fps | 96.2% |
| Vihtavuori N555 | <<locked>> | 84% | 55,637 psi | 86% | 3054 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,317 psi | 85% | 3136 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 90% | 56,362 psi | 87% | 3130 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 94% | 58,320 psi | 90% | 3205 fps | 99.2% |
| Vihtavuori N570 | <<locked>> | 94% | 55,724 psi | 86% | 3199 fps | 97.3% |
| Winchester StaBALL HD | <<locked>> | 88% | 58,653 psi | 90% | 3176 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,304 psi | 87% | 3058 fps | 100% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 44,991 psi | 69% | 2838 fps | 99.9% |
| Accurate High Country | <<locked>> | 80% | 49,893 psi | 77% | 3045 fps | 98.9% |
| Accurate MAGPRO | <<locked>> | 80% | 47,195 psi | 73% | 2979 fps | 97.4% |
| ADI AR 2209 | <<locked>> | 80% | 49,603 psi | 76% | 2989 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 80% | 44,643 psi | 69% | 2920 fps | 97.8% |
| ADI AR 2217 | <<locked>> | 82% | 35,447 psi | 55% | 2697 fps | 95.1% |
| ADI AR 2218 | <<locked>> | 94% | 47,137 psi | 73% | 3051 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 80% | 30,385 psi | 47% | 2589 fps | 95.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,269 psi | 76% | 2972 fps | 99.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,295 psi | 70% | 2920 fps | 98.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,164 psi | 68% | 2858 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,377 psi | 59% | 2789 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 50,415 psi | 78% | 3038 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 48,834 psi | 75% | 3041 fps | 95.9% |
| Alliant Reloder-50 | <<locked>> | 96% | 48,385 psi | 74% | 3022 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 45,818 psi | 71% | 2890 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 42,177 psi | 65% | 2851 fps | 98.1% |
| Bofors RP30 | <<locked>> | 80% | 35,578 psi | 55% | 2707 fps | 95.2% |
| Bofors RP5 | <<locked>> | 80% | 45,295 psi | 70% | 2920 fps | 98.9% |
| Hodgdon H1000 | <<locked>> | 80% | 36,129 psi | 56% | 2720 fps | 96.1% |
| Hodgdon H4831 | <<locked>> | 80% | 47,253 psi | 73% | 2923 fps | 97.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,267 psi | 71% | 2904 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,156 psi | 82% | 2959 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 37,420 psi | 58% | 2831 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,297 psi | 44% | 1798 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 55,143 psi | 85% | 3031 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,051 psi | 74% | 2913 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 80% | 43,468 psi | 67% | 2900 fps | 97.6% |
| IMR 8133 Enduron | <<locked>> | 88% | 37,072 psi | 57% | 2762 fps | 95.6% |
| Lovex S071 | <<locked>> | 80% | 38,667 psi | 60% | 2703 fps | 99.2% |
| Norma 217 | <<locked>> | 84% | 32,489 psi | 50% | 2654 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 48,385 psi | 74% | 2999 fps | 99.9% |
| Ramshot Grand | <<locked>> | 80% | 43,772 psi | 67% | 2913 fps | 98% |
| Ramshot Magnum | <<locked>> | 80% | 39,305 psi | 60% | 2776 fps | 98.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,979 psi | 45% | 1841 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 36,782 psi | 57% | 2799 fps | 98.5% |
| ReloadSwiss RS 80 | <<locked>> | 86% | 42,554 psi | 65% | 2900 fps | 96.2% |
| Rottweil R 904 | <<locked>> | 80% | 50,125 psi | 77% | 2959 fps | 99% |
| Rottweil R 905 | <<locked>> | 80% | 48,921 psi | 75% | 2966 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 48,588 psi | 75% | 2959 fps | 99.4% |
| Somchem S361 | <<locked>> | 80% | 51,184 psi | 79% | 2946 fps | 98.7% |
| Somchem S385 | <<locked>> | 80% | 49,139 psi | 76% | 2936 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 80% | 43,047 psi | 66% | 2805 fps | 98.9% |
| Vihtavuori N170 | <<locked>> | 90% | 51,866 psi | 80% | 2999 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 80% | 48,660 psi | 75% | 2940 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 47,979 psi | 74% | 2995 fps | 98.1% |
| Vihtavuori N565 | <<locked>> | 80% | 39,711 psi | 61% | 2792 fps | 96% |
| Vihtavuori N568 | <<locked>> | 86% | 43,555 psi | 67% | 2917 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 90% | 48,066 psi | 74% | 3048 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,062 psi | 66% | 2913 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,426 psi | 70% | 2864 fps | 98.9% |
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 | 128gr | Peregrine VLR-5. Hodgdon Retumbo delivers the highest muzzle velocity at 3,255 fps; across all powders the maximum-charge window runs from 2,008 fps to 3,255 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 128.0 gr projectile in 0.264" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, Alliant Reloder-50, Hodgdon TrailBoss 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, Accurate 8700, IMR 7977 Enduron, Lovex D100 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.