Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 122gr | Lehigh Defense Controlled Chaos bullet and 53 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, Alliant Reloder-33 and Hodgdon Retumbo.
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% | 58,653 psi | 90% | 3127 fps | 100% |
| Accurate High Country | <<locked>> | 84% | 56,681 psi | 87% | 3225 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 86% | 57,856 psi | 89% | 3235 fps | 99% |
| ADI AR 2209 | <<locked>> | 84% | 55,912 psi | 86% | 3159 fps | 99.8% |
| ADI AR 2213 | <<locked>> | 88% | 58,378 psi | 90% | 3235 fps | 99.6% |
| ADI AR 2217 | <<locked>> | 96% | 57,290 psi | 88% | 3209 fps | 99.8% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 58,175 psi | 90% | 3330 fps | 98% |
| ADI AR 2225 | <<locked>> | 98% | 56,420 psi | 87% | 3232 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 56,188 psi | 86% | 3156 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 84% | 55,593 psi | 86% | 3146 fps | 99.8% |
| Alliant Reloder-22 | <<locked>> | 86% | 54,984 psi | 85% | 3166 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 88% | 56,869 psi | 88% | 3130 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 57,334 psi | 88% | 3205 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 57,711 psi | 89% | 3222 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 55,767 psi | 86% | 3232 fps | 97.2% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 55,535 psi | 85% | 3215 fps | 96.7% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 55,042 psi | 85% | 3123 fps | 97.4% |
| Bofors RP15 | <<locked>> | 90% | 58,218 psi | 90% | 3215 fps | 99.9% |
| Bofors RP30 | <<locked>> | 94% | 57,188 psi | 88% | 3219 fps | 99.7% |
| Bofors RP5 | <<locked>> | 86% | 54,984 psi | 85% | 3166 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 92% | 54,839 psi | 84% | 3169 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 86% | 57,276 psi | 88% | 3163 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 86% | 56,130 psi | 86% | 3143 fps | 99% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 56,231 psi | 87% | 3068 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 56,739 psi | 87% | 3297 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,753 psi | 58% | 2054 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,885 psi | 89% | 3133 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 57,334 psi | 88% | 3136 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 88% | 56,724 psi | 87% | 3212 fps | 99.5% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 55,390 psi | 85% | 3202 fps | 99.6% |
| Lovex S071 | <<locked>> | 92% | 56,782 psi | 87% | 3097 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 56,579 psi | 87% | 3228 fps | 100% |
| Norma MRP | <<locked>> | 84% | 55,042 psi | 85% | 3179 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 58,320 psi | 90% | 3245 fps | 99.8% |
| Ramshot Magnum | <<locked>> | 90% | 56,652 psi | 87% | 3163 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,841 psi | 60% | 2103 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 57,798 psi | 89% | 3284 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 57,101 psi | 88% | 3245 fps | 99.1% |
| Rottweil R 904 | <<locked>> | 84% | 56,391 psi | 87% | 3127 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 84% | 55,230 psi | 85% | 3136 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 58,711 psi | 90% | 3196 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 57,740 psi | 89% | 3114 fps | 99.2% |
| Somchem S365 | <<locked>> | 82% | 58,349 psi | 90% | 3130 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 55,579 psi | 86% | 3104 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 55,651 psi | 86% | 3091 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 58,726 psi | 90% | 3173 fps | 96.4% |
| Vihtavuori N555 | <<locked>> | 86% | 58,624 psi | 90% | 3159 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 58,508 psi | 90% | 3248 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 90% | 55,608 psi | 86% | 3173 fps | 99.2% |
| Vihtavuori N568 | <<locked>> | 94% | 57,276 psi | 88% | 3245 fps | 98.7% |
| Vihtavuori N570 | <<locked>> | 94% | 54,665 psi | 84% | 3235 fps | 96.6% |
| Winchester StaBALL HD | <<locked>> | 88% | 57,421 psi | 88% | 3225 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 55,521 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% | 44,730 psi | 69% | 2884 fps | 99.8% |
| Accurate High Country | <<locked>> | 80% | 49,197 psi | 76% | 3087 fps | 98.5% |
| Accurate MAGPRO | <<locked>> | 80% | 46,586 psi | 72% | 3018 fps | 96.7% |
| ADI AR 2209 | <<locked>> | 80% | 48,892 psi | 75% | 3028 fps | 99.1% |
| ADI AR 2213 | <<locked>> | 80% | 44,164 psi | 68% | 2963 fps | 97.3% |
| ADI AR 2217 | <<locked>> | 84% | 37,724 psi | 58% | 2805 fps | 95.5% |
| ADI AR 2218 | <<locked>> | 96% | 49,995 psi | 77% | 3166 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 80% | 30,226 psi | 47% | 2628 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 49,095 psi | 76% | 3025 fps | 99.1% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,646 psi | 75% | 3018 fps | 99.1% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,947 psi | 69% | 2966 fps | 98.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 43,656 psi | 67% | 2904 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,884 psi | 58% | 2831 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 80% | 49,661 psi | 76% | 3084 fps | 100% |
| Alliant Reloder-33 | 83.2 gr | 92% | 47,790 psi | 74% | 3077 fps | 95% |
| Alliant Reloder-50 | <<locked>> | 98% | 51,459 psi | 79% | 3140 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 48,356 psi | 74% | 2995 fps | 95.7% |
| Bofors RP15 | <<locked>> | 80% | 41,742 psi | 64% | 2894 fps | 97.6% |
| Bofors RP30 | <<locked>> | 82% | 37,898 psi | 58% | 2818 fps | 95.6% |
| Bofors RP5 | <<locked>> | 80% | 44,947 psi | 69% | 2966 fps | 98.5% |
| Hodgdon H1000 | <<locked>> | 80% | 35,781 psi | 55% | 2756 fps | 95.4% |
| Hodgdon H4831 | <<locked>> | 80% | 46,630 psi | 72% | 2963 fps | 97.3% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,890 psi | 71% | 2949 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 52,721 psi | 81% | 3012 fps | 100% |
| Hodgdon Retumbo | 67.1 gr | 80% | 36,970 psi | 57% | 2867 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,369 psi | 44% | 1841 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 54,462 psi | 84% | 3074 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 47,485 psi | 73% | 2953 fps | 97.7% |
| IMR 7828 SSC | <<locked>> | 80% | 42,801 psi | 66% | 2940 fps | 96.9% |
| IMR 8133 Enduron | <<locked>> | 90% | 39,247 psi | 60% | 2871 fps | 96% |
| Lovex S071 | <<locked>> | 80% | 38,595 psi | 59% | 2753 fps | 98.9% |
| Norma 217 | <<locked>> | 84% | 32,198 psi | 50% | 2697 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 47,732 psi | 73% | 3045 fps | 99.7% |
| Ramshot Grand | <<locked>> | 80% | 43,207 psi | 66% | 2956 fps | 97.4% |
| Ramshot Magnum | <<locked>> | 80% | 38,827 psi | 60% | 2818 fps | 97.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,080 psi | 45% | 1883 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 36,361 psi | 56% | 2841 fps | 98% |
| ReloadSwiss RS 80 | <<locked>> | 86% | 41,974 psi | 65% | 2940 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 49,516 psi | 76% | 3002 fps | 98.5% |
| Rottweil R 905 | <<locked>> | 80% | 48,341 psi | 74% | 3009 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,993 psi | 74% | 3002 fps | 99.1% |
| Somchem S361 | <<locked>> | 80% | 50,618 psi | 78% | 2989 fps | 98.2% |
| Somchem S365 | <<locked>> | 80% | 54,679 psi | 84% | 3074 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 48,878 psi | 75% | 2986 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 80% | 42,627 psi | 66% | 2848 fps | 98.5% |
| Vihtavuori N170 | <<locked>> | 92% | 54,984 psi | 85% | 3104 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 80% | 48,240 psi | 74% | 2992 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 47,311 psi | 73% | 3035 fps | 97.5% |
| Vihtavuori N565 | <<locked>> | 80% | 39,407 psi | 61% | 2835 fps | 95.4% |
| Vihtavuori N568 | <<locked>> | 86% | 42,946 psi | 66% | 2956 fps | 95.1% |
| Vihtavuori N570 | 80.1 gr | 92% | 50,908 psi | 78% | 3163 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 42,264 psi | 65% | 2963 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,121 psi | 69% | 2910 fps | 98.6% |
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 53 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 122gr | Lehigh Defense Controlled Chaos. ADI AR 2218 delivers the highest muzzle velocity at 3,330 fps; across all powders the maximum-charge window runs from 2,054 fps to 3,330 fps. ADI AR 2218 gives the best case fill at 100 %, and 53 of the 53 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 122.0 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. Vihtavuori N570, Alliant Reloder-33, Hodgdon Retumbo rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 122gr | Lehigh Defense Controlled Chaos 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.