Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 120gr | Remington PSP Core-Lokt 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 ReloadSwiss RS 80.
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% | 56,869 psi | 88% | 3120 fps | 100% |
| Accurate High Country | <<locked>> | 82% | 54,926 psi | 85% | 3212 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 84% | 56,057 psi | 86% | 3222 fps | 98.8% |
| ADI AR 2209 | <<locked>> | 84% | 57,885 psi | 89% | 3209 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 86% | 56,565 psi | 87% | 3222 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 94% | 55,840 psi | 86% | 3199 fps | 99.7% |
| ADI AR 2218 | <<locked>> | 98% | 56,434 psi | 87% | 3310 fps | 97.6% |
| ADI AR 2225 | <<locked>> | 96% | 55,259 psi | 85% | 3222 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 57,493 psi | 88% | 3199 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 86% | 57,072 psi | 88% | 3215 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 86% | 55,390 psi | 85% | 3123 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 56,043 psi | 86% | 3199 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 56,057 psi | 86% | 3209 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 58,595 psi | 90% | 3294 fps | 97.8% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 58,653 psi | 90% | 3281 fps | 97.3% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 56,898 psi | 88% | 3176 fps | 97.8% |
| Bofors RP15 | <<locked>> | 88% | 56,492 psi | 87% | 3202 fps | 99.9% |
| Bofors RP30 | <<locked>> | 92% | 55,767 psi | 86% | 3209 fps | 99.6% |
| Bofors RP5 | <<locked>> | 86% | 57,072 psi | 88% | 3215 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 92% | 57,261 psi | 88% | 3222 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 84% | 55,274 psi | 85% | 3146 fps | 99% |
| Hodgdon H4831 SC | <<locked>> | 86% | 58,102 psi | 89% | 3196 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 58,015 psi | 89% | 3114 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 55,274 psi | 85% | 3284 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,869 psi | 58% | 2087 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 55,651 psi | 86% | 3127 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 86% | 55,027 psi | 85% | 3202 fps | 99.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 58,030 psi | 89% | 3258 fps | 99.8% |
| Lovex S071 | <<locked>> | 90% | 55,187 psi | 85% | 3091 fps | 100% |
| Norma 217 | <<locked>> | 98% | 55,724 psi | 86% | 3225 fps | 100% |
| Norma MRP | <<locked>> | 84% | 57,203 psi | 88% | 3228 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 56,449 psi | 87% | 3225 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 88% | 55,013 psi | 85% | 3150 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,928 psi | 60% | 2133 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 56,405 psi | 87% | 3271 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 55,477 psi | 85% | 3225 fps | 98.8% |
| Rottweil R 904 | <<locked>> | 84% | 58,044 psi | 89% | 3173 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 84% | 57,217 psi | 88% | 3189 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 56,840 psi | 87% | 3182 fps | 99.9% |
| Somchem S361 | <<locked>> | 82% | 55,883 psi | 86% | 3104 fps | 99.1% |
| Somchem S385 | <<locked>> | 84% | 57,624 psi | 89% | 3156 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 57,740 psi | 89% | 3143 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 57,058 psi | 88% | 3159 fps | 96.1% |
| Vihtavuori N555 | <<locked>> | 84% | 56,985 psi | 88% | 3153 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 56,521 psi | 87% | 3228 fps | 99.2% |
| Vihtavuori N565 | <<locked>> | 90% | 57,914 psi | 89% | 3225 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 92% | 56,057 psi | 86% | 3232 fps | 98.5% |
| Vihtavuori N570 | <<locked>> | 94% | 57,290 psi | 88% | 3294 fps | 97.1% |
| Winchester StaBALL HD | <<locked>> | 86% | 56,101 psi | 86% | 3212 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 57,435 psi | 88% | 3153 fps | 99.9% |
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% | 46,514 psi | 72% | 2936 fps | 99.9% |
| Accurate High Country | <<locked>> | 80% | 51,242 psi | 79% | 3140 fps | 98.8% |
| Accurate MAGPRO | <<locked>> | 80% | 48,617 psi | 75% | 3077 fps | 97.3% |
| ADI AR 2209 | <<locked>> | 80% | 50,560 psi | 78% | 3081 fps | 99.4% |
| ADI AR 2213 | <<locked>> | 80% | 45,759 psi | 70% | 3012 fps | 97.6% |
| ADI AR 2217 | <<locked>> | 84% | 39,334 psi | 61% | 2861 fps | 96.2% |
| ADI AR 2218 | 87.3 gr | 94% | 48,573 psi | 75% | 3146 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 80% | 31,589 psi | 49% | 2680 fps | 95.8% |
| Alliant Reloder-19 | <<locked>> | 80% | 50,415 psi | 78% | 3071 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 46,528 psi | 72% | 3015 fps | 98.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 45,397 psi | 70% | 2949 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 39,523 psi | 61% | 2881 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 51,982 psi | 80% | 3140 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 50,328 psi | 77% | 3136 fps | 95.8% |
| Alliant Reloder-50 | <<locked>> | 96% | 50,589 psi | 78% | 3127 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 46,746 psi | 72% | 2976 fps | 95.2% |
| Bofors RP15 | <<locked>> | 80% | 43,323 psi | 67% | 2943 fps | 98% |
| Bofors RP30 | <<locked>> | 80% | 36,956 psi | 57% | 2805 fps | 95.1% |
| Bofors RP5 | <<locked>> | 80% | 46,528 psi | 72% | 3015 fps | 98.8% |
| Hodgdon H1000 | <<locked>> | 80% | 37,260 psi | 57% | 2808 fps | 96% |
| Hodgdon H4831 | <<locked>> | 80% | 48,283 psi | 74% | 3015 fps | 97.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 47,355 psi | 73% | 2995 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 54,346 psi | 84% | 3058 fps | 100% |
| Hodgdon Retumbo | 70.2 gr | 80% | 38,667 psi | 60% | 2923 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,413 psi | 44% | 1867 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,907 psi | 75% | 3002 fps | 98% |
| IMR 7828 SSC | <<locked>> | 80% | 44,643 psi | 69% | 2992 fps | 97.4% |
| IMR 8133 Enduron | <<locked>> | 88% | 38,522 psi | 59% | 2858 fps | 95.6% |
| Lovex S071 | <<locked>> | 80% | 40,059 psi | 62% | 2799 fps | 99.2% |
| Norma 217 | <<locked>> | 84% | 33,837 psi | 52% | 2746 fps | 95.9% |
| Norma MRP | <<locked>> | 80% | 49,719 psi | 77% | 3097 fps | 99.8% |
| Ramshot Grand | <<locked>> | 80% | 45,092 psi | 69% | 3009 fps | 97.8% |
| Ramshot Magnum | <<locked>> | 80% | 40,640 psi | 63% | 2867 fps | 98.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,254 psi | 45% | 1913 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 38,174 psi | 59% | 2897 fps | 98.5% |
| ReloadSwiss RS 80 | 81.4 gr | 86% | 44,266 psi | 68% | 2995 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 51,082 psi | 79% | 3051 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 80% | 49,995 psi | 77% | 3058 fps | 99.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 49,647 psi | 76% | 3054 fps | 99.3% |
| Somchem S361 | <<locked>> | 80% | 52,185 psi | 80% | 3038 fps | 98.5% |
| Somchem S385 | <<locked>> | 80% | 50,401 psi | 78% | 3031 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 80% | 44,251 psi | 68% | 2897 fps | 98.8% |
| Vihtavuori N170 | <<locked>> | 90% | 53,330 psi | 82% | 3094 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 80% | 50,038 psi | 77% | 3038 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 49,211 psi | 76% | 3091 fps | 98% |
| Vihtavuori N565 | <<locked>> | 80% | 41,162 psi | 63% | 2887 fps | 95.9% |
| Vihtavuori N568 | <<locked>> | 86% | 45,121 psi | 69% | 3015 fps | 95.9% |
| Vihtavuori N570 | <<locked>> | 90% | 49,676 psi | 76% | 3146 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 44,498 psi | 68% | 3012 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 46,731 psi | 72% | 2956 fps | 98.8% |
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 | 120gr | Remington PSP Core-Lokt. ADI AR 2218 delivers the highest muzzle velocity at 3,310 fps; across all powders the maximum-charge window runs from 2,087 fps to 3,310 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 120.0 gr projectile in 0.264" calls for a 1:11.5 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, ReloadSwiss RS 80 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 120gr | Remington PSP Core-Lokt 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.