Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 118gr | Peregrine Plainsmaster (VLR-4) bullet and 57 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, Hodgdon Retumbo and ReloadSwiss RS 76.
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>> | 88% | 56,362 psi | 87% | 3140 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 58,479 psi | 90% | 3304 fps | 99.6% |
| Accurate MAGPRO | <<locked>> | 86% | 55,463 psi | 85% | 3238 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 86% | 57,885 psi | 89% | 3238 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 88% | 56,478 psi | 87% | 3248 fps | 99.3% |
| ADI AR 2217 | <<locked>> | 96% | 55,143 psi | 85% | 3215 fps | 99.5% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 55,695 psi | 86% | 3323 fps | 97.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 58,059 psi | 89% | 3301 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 57,899 psi | 89% | 3225 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 57,406 psi | 88% | 3222 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 56,797 psi | 87% | 3241 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 90% | 58,508 psi | 90% | 3205 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 55,129 psi | 85% | 3219 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 55,317 psi | 85% | 3228 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 57,638 psi | 89% | 3304 fps | 97.3% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 57,145 psi | 88% | 3205 fps | 97.5% |
| Bofors RP15 | <<locked>> | 90% | 55,970 psi | 86% | 3222 fps | 99.7% |
| Bofors RP30 | <<locked>> | 94% | 54,868 psi | 84% | 3222 fps | 99.4% |
| Bofors RP5 | <<locked>> | 88% | 56,797 psi | 87% | 3241 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 94% | 56,782 psi | 87% | 3245 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 86% | 55,303 psi | 85% | 3173 fps | 98.7% |
| Hodgdon H4831 SC | <<locked>> | 88% | 58,276 psi | 90% | 3225 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 57,972 psi | 89% | 3143 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 58,291 psi | 90% | 3369 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,652 psi | 58% | 2087 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 56,173 psi | 86% | 3150 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 56,898 psi | 88% | 3156 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 55,796 psi | 86% | 3153 fps | 98.9% |
| IMR 7828 SSC | <<locked>> | 90% | 58,784 psi | 90% | 3294 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 52,866 psi | 81% | 3199 fps | 99.1% |
| Lovex S070 | <<locked>> | 82% | 58,421 psi | 90% | 3186 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 58,015 psi | 89% | 3163 fps | 100% |
| Norma 204 | <<locked>> | 82% | 57,740 psi | 89% | 3215 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 54,128 psi | 83% | 3232 fps | 100% |
| Norma MRP | <<locked>> | 86% | 56,797 psi | 87% | 3255 fps | 100% |
| Norma URP | <<locked>> | 82% | 58,581 psi | 90% | 3202 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 55,869 psi | 86% | 3248 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 82% | 57,711 psi | 89% | 3209 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 58,668 psi | 90% | 3241 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,493 psi | 59% | 2133 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 55,158 psi | 85% | 3287 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 58,740 psi | 90% | 3314 fps | 99.1% |
| Rottweil R 904 | <<locked>> | 86% | 58,407 psi | 90% | 3205 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 86% | 57,000 psi | 88% | 3212 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 82% | 58,421 psi | 90% | 3186 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 56,608 psi | 87% | 3209 fps | 99.8% |
| Somchem S361 | <<locked>> | 84% | 56,043 psi | 86% | 3127 fps | 98.9% |
| Somchem S365 | <<locked>> | 82% | 56,159 psi | 86% | 3143 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 57,406 psi | 88% | 3179 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 57,319 psi | 88% | 3163 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 56,492 psi | 87% | 3176 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 56,260 psi | 87% | 3251 fps | 99% |
| Vihtavuori N565 | <<locked>> | 92% | 57,116 psi | 88% | 3241 fps | 99.2% |
| Vihtavuori N568 | <<locked>> | 94% | 55,027 psi | 85% | 3245 fps | 98.1% |
| Vihtavuori N570 | <<locked>> | 96% | 56,333 psi | 87% | 3307 fps | 96.6% |
| Winchester StaBALL HD | <<locked>> | 88% | 54,810 psi | 84% | 3232 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 57,276 psi | 88% | 3176 fps | 99.8% |
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% | 42,583 psi | 66% | 2884 fps | 99.4% |
| Accurate High Country | <<locked>> | 80% | 47,268 psi | 73% | 3091 fps | 97.8% |
| Accurate MAGPRO | <<locked>> | 80% | 44,657 psi | 69% | 3018 fps | 95.8% |
| ADI AR 2209 | <<locked>> | 80% | 47,152 psi | 73% | 3038 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 80% | 42,366 psi | 65% | 2963 fps | 96.3% |
| ADI AR 2217 | <<locked>> | 86% | 38,638 psi | 59% | 2864 fps | 95.4% |
| ADI AR 2218 | <<locked>> | 98% | 51,779 psi | 80% | 3241 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 84% | 32,909 psi | 51% | 2749 fps | 96.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 54,244 psi | 83% | 3169 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 46,905 psi | 72% | 3025 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,018 psi | 66% | 2969 fps | 97.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,713 psi | 64% | 2910 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,013 psi | 55% | 2825 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 47,456 psi | 73% | 3087 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 49,211 psi | 76% | 3143 fps | 95.1% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 49,980 psi | 77% | 3068 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 39,885 psi | 61% | 2890 fps | 96.7% |
| Bofors RP30 | <<locked>> | 84% | 38,609 psi | 59% | 2877 fps | 95.5% |
| Bofors RP5 | <<locked>> | 80% | 43,018 psi | 66% | 2969 fps | 97.8% |
| Hodgdon H1000 | <<locked>> | 82% | 36,637 psi | 56% | 2818 fps | 95.3% |
| Hodgdon H4831 | <<locked>> | 80% | 44,889 psi | 69% | 2969 fps | 96.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,150 psi | 68% | 2949 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 50,676 psi | 78% | 3028 fps | 100% |
| Hodgdon Retumbo | 67.7 gr | 80% | 35,114 psi | 54% | 2851 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,181 psi | 43% | 1870 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,794 psi | 81% | 3091 fps | 99.8% |
| IMR 4831 | <<locked>> | 80% | 53,214 psi | 82% | 3094 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 45,948 psi | 71% | 2963 fps | 97% |
| IMR 7828 SSC | <<locked>> | 80% | 40,959 psi | 63% | 2936 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 92% | 39,856 psi | 61% | 2923 fps | 95.8% |
| Lovex S070 | <<locked>> | 80% | 54,694 psi | 84% | 3123 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 36,579 psi | 56% | 2746 fps | 98.2% |
| Norma 204 | <<locked>> | 80% | 53,737 psi | 83% | 3146 fps | 99.5% |
| Norma 217 | <<locked>> | 88% | 34,911 psi | 54% | 2808 fps | 96.1% |
| Norma MRP | <<locked>> | 80% | 45,803 psi | 70% | 3045 fps | 99.3% |
| Norma URP | <<locked>> | 80% | 54,752 psi | 84% | 3143 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 41,118 psi | 63% | 2949 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 80% | 53,795 psi | 83% | 3143 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 36,927 psi | 57% | 2808 fps | 96.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,834 psi | 44% | 1913 fps | 100% |
| ReloadSwiss RS 76 | 72.4 gr | 80% | 34,330 psi | 53% | 2818 fps | 96.6% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 42,960 psi | 66% | 3002 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 47,877 psi | 74% | 3012 fps | 98% |
| Rottweil R 905 | <<locked>> | 80% | 46,456 psi | 71% | 3012 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 80% | 54,694 psi | 84% | 3123 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 46,122 psi | 71% | 3009 fps | 98.5% |
| Somchem S361 | <<locked>> | 80% | 48,849 psi | 75% | 2995 fps | 97.6% |
| Somchem S365 | <<locked>> | 80% | 52,605 psi | 81% | 3091 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 46,920 psi | 72% | 2989 fps | 99.2% |
| Vihtavuori N165 | <<locked>> | 80% | 40,843 psi | 63% | 2851 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 80% | 46,093 psi | 71% | 2995 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 45,513 psi | 70% | 3038 fps | 96.7% |
| Vihtavuori N565 | <<locked>> | 82% | 40,248 psi | 62% | 2894 fps | 95.3% |
| Vihtavuori N568 | <<locked>> | 88% | 44,106 psi | 68% | 3018 fps | 95.1% |
| Vihtavuori N570 | 82.5 gr | 94% | 52,199 psi | 80% | 3228 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 39,885 psi | 61% | 2953 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,279 psi | 67% | 2913 fps | 97.9% |
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 57 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 118gr | Peregrine Plainsmaster (VLR-4). Hodgdon Retumbo delivers the highest muzzle velocity at 3,369 fps; across all powders the maximum-charge window runs from 2,087 fps to 3,369 fps. ADI AR 2218 gives the best case fill at 100 %, and 57 of the 57 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 118.0 gr projectile in 0.264" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, 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. Vihtavuori N570, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 118gr | Peregrine Plainsmaster (VLR-4) 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.