Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 121gr | Lehigh Defense Match Solid bullet and 54 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Vihtavuori N570 and Alliant Reloder-33.
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>> | 88% | 58,276 psi | 90% | 3133 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 56,304 psi | 87% | 3232 fps | 99.4% |
| Accurate MAGPRO | <<locked>> | 86% | 57,246 psi | 88% | 3235 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 84% | 55,564 psi | 86% | 3163 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 88% | 57,986 psi | 89% | 3238 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 96% | 56,898 psi | 88% | 3215 fps | 99.7% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 57,522 psi | 89% | 3330 fps | 97.8% |
| ADI AR 2225 | <<locked>> | 98% | 55,724 psi | 86% | 3232 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 55,593 psi | 86% | 3156 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 86% | 58,784 psi | 90% | 3212 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 88% | 58,421 psi | 90% | 3232 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 56,492 psi | 87% | 3136 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 56,942 psi | 88% | 3212 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 57,261 psi | 88% | 3225 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 55,129 psi | 85% | 3232 fps | 97% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 54,824 psi | 84% | 3212 fps | 96.4% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 58,305 psi | 90% | 3192 fps | 97.9% |
| Bofors RP15 | <<locked>> | 90% | 57,580 psi | 89% | 3215 fps | 99.9% |
| Bofors RP30 | <<locked>> | 94% | 56,811 psi | 87% | 3225 fps | 99.7% |
| Bofors RP5 | <<locked>> | 88% | 58,421 psi | 90% | 3232 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 58,320 psi | 90% | 3235 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 86% | 56,724 psi | 87% | 3166 fps | 99.1% |
| Hodgdon H4831 SC | <<locked>> | 86% | 55,782 psi | 86% | 3146 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 55,651 psi | 86% | 3071 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 56,043 psi | 86% | 3297 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,826 psi | 58% | 2064 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,551 psi | 89% | 3136 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 58,392 psi | 90% | 3140 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 57,029 psi | 88% | 3143 fps | 99.2% |
| IMR 7828 SSC | <<locked>> | 88% | 56,318 psi | 87% | 3215 fps | 99.4% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 54,708 psi | 84% | 3202 fps | 99.5% |
| Lovex S071 | <<locked>> | 92% | 56,188 psi | 86% | 3100 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 56,101 psi | 86% | 3232 fps | 100% |
| Norma MRP | <<locked>> | 86% | 58,552 psi | 90% | 3248 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 57,667 psi | 89% | 3245 fps | 99.7% |
| Ramshot Magnum | <<locked>> | 90% | 56,217 psi | 87% | 3166 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,740 psi | 60% | 2106 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 57,043 psi | 88% | 3284 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 56,420 psi | 87% | 3241 fps | 98.9% |
| Rottweil R 904 | <<locked>> | 84% | 55,825 psi | 86% | 3127 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 86% | 58,726 psi | 90% | 3205 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 58,334 psi | 90% | 3202 fps | 99.9% |
| Somchem S361 | <<locked>> | 84% | 57,450 psi | 88% | 3120 fps | 99.2% |
| Somchem S365 | <<locked>> | 82% | 57,972 psi | 89% | 3136 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 55,245 psi | 85% | 3110 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 55,332 psi | 85% | 3097 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 94% | 58,421 psi | 90% | 3173 fps | 96.2% |
| Vihtavuori N555 | <<locked>> | 86% | 58,218 psi | 90% | 3166 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 57,914 psi | 89% | 3248 fps | 99.3% |
| Vihtavuori N565 | <<locked>> | 90% | 55,230 psi | 85% | 3176 fps | 99.1% |
| Vihtavuori N568 | <<locked>> | 94% | 56,840 psi | 87% | 3245 fps | 98.6% |
| Vihtavuori N570 | <<locked>> | 96% | 58,189 psi | 90% | 3310 fps | 97.3% |
| Winchester StaBALL HD | <<locked>> | 88% | 56,927 psi | 88% | 3228 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 54,940 psi | 85% | 3104 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% | 44,425 psi | 68% | 2890 fps | 99.7% |
| Accurate High Country | <<locked>> | 80% | 48,849 psi | 75% | 3091 fps | 98.3% |
| Accurate MAGPRO | <<locked>> | 80% | 46,253 psi | 71% | 3022 fps | 96.6% |
| ADI AR 2209 | <<locked>> | 80% | 48,370 psi | 74% | 3028 fps | 99% |
| ADI AR 2213 | <<locked>> | 80% | 43,656 psi | 67% | 2959 fps | 97% |
| ADI AR 2217 | <<locked>> | 84% | 37,434 psi | 58% | 2808 fps | 95.3% |
| ADI AR 2218 | <<locked>> | 96% | 49,400 psi | 76% | 3163 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 82% | 32,010 psi | 49% | 2697 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 48,762 psi | 75% | 3028 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,312 psi | 74% | 3022 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,425 psi | 68% | 2969 fps | 98.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 43,308 psi | 67% | 2907 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,391 psi | 58% | 2831 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 49,269 psi | 76% | 3091 fps | 100% |
| Alliant Reloder-33 | 84.9 gr | 94% | 51,082 psi | 79% | 3153 fps | 96% |
| Alliant Reloder-50 | <<locked>> | 98% | 50,807 psi | 78% | 3136 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 47,892 psi | 74% | 2995 fps | 95.5% |
| Bofors RP15 | <<locked>> | 80% | 41,423 psi | 64% | 2897 fps | 97.4% |
| Bofors RP30 | <<locked>> | 82% | 37,594 psi | 58% | 2822 fps | 95.4% |
| Bofors RP5 | <<locked>> | 80% | 44,425 psi | 68% | 2969 fps | 98.3% |
| Hodgdon H1000 | <<locked>> | 80% | 35,491 psi | 55% | 2759 fps | 95.1% |
| Hodgdon H4831 | <<locked>> | 80% | 46,325 psi | 71% | 2966 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,397 psi | 70% | 2946 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 52,170 psi | 80% | 3015 fps | 100% |
| Hodgdon Retumbo | 67 gr | 80% | 36,637 psi | 56% | 2871 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,268 psi | 44% | 1844 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,911 psi | 83% | 3074 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 54,839 psi | 84% | 3084 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,036 psi | 72% | 2953 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 80% | 42,453 psi | 65% | 2943 fps | 96.7% |
| IMR 8133 Enduron | <<locked>> | 90% | 38,885 psi | 60% | 2867 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 38,290 psi | 59% | 2756 fps | 98.8% |
| Norma 217 | <<locked>> | 86% | 34,185 psi | 53% | 2762 fps | 96.1% |
| Norma MRP | <<locked>> | 80% | 47,355 psi | 73% | 3048 fps | 99.6% |
| Ramshot Grand | <<locked>> | 80% | 42,641 psi | 66% | 2956 fps | 97.2% |
| Ramshot Magnum | <<locked>> | 80% | 38,508 psi | 59% | 2818 fps | 97.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,124 psi | 45% | 1890 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 36,013 psi | 55% | 2841 fps | 97.7% |
| ReloadSwiss RS 80 | <<locked>> | 86% | 41,597 psi | 64% | 2940 fps | 95.2% |
| Rottweil R 904 | <<locked>> | 80% | 49,211 psi | 76% | 3005 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 80% | 47,993 psi | 74% | 3012 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,645 psi | 73% | 3005 fps | 99% |
| Somchem S361 | <<locked>> | 80% | 50,140 psi | 77% | 2989 fps | 98.1% |
| Somchem S365 | <<locked>> | 80% | 54,070 psi | 83% | 3074 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 48,370 psi | 74% | 2986 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 80% | 42,337 psi | 65% | 2851 fps | 98.4% |
| Vihtavuori N170 | <<locked>> | 92% | 54,418 psi | 84% | 3104 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 80% | 47,877 psi | 74% | 2995 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,963 psi | 72% | 3038 fps | 97.4% |
| Vihtavuori N565 | <<locked>> | 80% | 39,088 psi | 60% | 2835 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 88% | 45,730 psi | 70% | 3028 fps | 96% |
| Vihtavuori N570 | 79.9 gr | 92% | 50,285 psi | 77% | 3159 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,858 psi | 64% | 2966 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,643 psi | 69% | 2907 fps | 98.4% |
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 54 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 121gr | Lehigh Defense Match Solid. ADI AR 2218 delivers the highest muzzle velocity at 3,330 fps; across all powders the maximum-charge window runs from 2,064 fps to 3,330 fps. ADI AR 2218 gives the best case fill at 100 %, and 54 of the 54 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 121.0 gr projectile in 0.264" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, 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. Hodgdon Retumbo, Vihtavuori N570, Alliant Reloder-33 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 121gr | Lehigh Defense Match Solid 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.