Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 139gr | Lapua Scenar bullet and 52 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, 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>> | 84% | 56,362 psi | 87% | 2923 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 51,967 psi | 80% | 2956 fps | 97.2% |
| Accurate High Country | <<locked>> | 82% | 58,450 psi | 90% | 3087 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 55,448 psi | 85% | 3031 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 82% | 57,000 psi | 88% | 3009 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 55,927 psi | 86% | 3025 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 92% | 55,535 psi | 85% | 3015 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 56,130 psi | 86% | 3143 fps | 98.8% |
| ADI AR 2225 | <<locked>> | 94% | 55,201 psi | 85% | 3038 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 57,232 psi | 88% | 3005 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 56,695 psi | 87% | 2999 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 56,507 psi | 87% | 3022 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 58,711 psi | 90% | 2979 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 55,738 psi | 86% | 3005 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 58,175 psi | 90% | 3114 fps | 98.8% |
| Alliant Reloder-50 | <<locked>> | 98% | 58,494 psi | 90% | 3110 fps | 98.5% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 56,043 psi | 86% | 2986 fps | 98.7% |
| Bofors RP15 | <<locked>> | 86% | 55,970 psi | 86% | 3012 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 55,695 psi | 86% | 3028 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 56,507 psi | 87% | 3022 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 56,913 psi | 88% | 3035 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 58,407 psi | 90% | 3018 fps | 99.8% |
| Hodgdon H4831 SC | <<locked>> | 84% | 57,290 psi | 88% | 3002 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 88% | 55,448 psi | 85% | 3097 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,116 psi | 59% | 1939 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 58,305 psi | 90% | 2992 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 86% | 58,465 psi | 90% | 3074 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 56,884 psi | 88% | 2943 fps | 95.9% |
| IMR 8133 Enduron | <<locked>> | 98% | 57,899 psi | 89% | 3081 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 58,436 psi | 90% | 2953 fps | 100% |
| Norma 217 | <<locked>> | 96% | 55,680 psi | 86% | 3041 fps | 100% |
| Norma MRP | <<locked>> | 82% | 56,826 psi | 87% | 3035 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 56,072 psi | 86% | 3038 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 58,494 psi | 90% | 3022 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,102 psi | 60% | 1985 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 56,217 psi | 87% | 3084 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 55,201 psi | 85% | 3048 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 82% | 57,188 psi | 88% | 2976 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 82% | 56,637 psi | 87% | 2992 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 53,809 psi | 83% | 2966 fps | 97.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 56,275 psi | 87% | 2989 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 58,523 psi | 90% | 2969 fps | 99.9% |
| Somchem S385 | <<locked>> | 82% | 56,724 psi | 87% | 2956 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 56,913 psi | 88% | 2946 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 56,333 psi | 87% | 2979 fps | 97.2% |
| Vihtavuori N555 | <<locked>> | 82% | 56,739 psi | 87% | 2956 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 56,130 psi | 86% | 3041 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 88% | 57,551 psi | 89% | 3041 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 90% | 55,593 psi | 86% | 3051 fps | 99.3% |
| Vihtavuori N570 | <<locked>> | 92% | 57,058 psi | 88% | 3117 fps | 98.3% |
| Winchester StaBALL HD | <<locked>> | 84% | 55,941 psi | 86% | 3018 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 56,681 psi | 87% | 2959 fps | 100% |
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% | 49,211 psi | 76% | 2812 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 44,759 psi | 69% | 2818 fps | 95.1% |
| Accurate High Country | <<locked>> | 80% | 54,433 psi | 84% | 3022 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 80% | 51,605 psi | 79% | 2959 fps | 99% |
| ADI AR 2209 | <<locked>> | 80% | 53,461 psi | 82% | 2949 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 48,602 psi | 75% | 2894 fps | 99.2% |
| ADI AR 2217 | <<locked>> | 80% | 36,463 psi | 56% | 2635 fps | 96.7% |
| ADI AR 2218 | 79.8 gr | 90% | 44,759 psi | 69% | 2907 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 80% | 33,823 psi | 52% | 2602 fps | 98.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 53,577 psi | 82% | 2943 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 53,069 psi | 82% | 2936 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 49,342 psi | 76% | 2897 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 48,240 psi | 74% | 2822 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 42,453 psi | 65% | 2776 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 43,236 psi | 67% | 2828 fps | 95.1% |
| Alliant Reloder-50 | <<locked>> | 92% | 46,876 psi | 72% | 2897 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 46,050 psi | 71% | 2799 fps | 96.5% |
| Bofors RP15 | <<locked>> | 80% | 46,079 psi | 71% | 2835 fps | 99.4% |
| Bofors RP30 | <<locked>> | 80% | 39,552 psi | 61% | 2713 fps | 97.7% |
| Bofors RP5 | <<locked>> | 80% | 49,342 psi | 76% | 2897 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 80% | 39,755 psi | 61% | 2713 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 80% | 51,024 psi | 79% | 2894 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 50,009 psi | 77% | 2874 fps | 99.1% |
| Hodgdon Retumbo | 67 gr | 80% | 41,568 psi | 64% | 2835 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,529 psi | 44% | 1732 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 51,430 psi | 79% | 2874 fps | 99.3% |
| IMR 7828 SSC | <<locked>> | 80% | 47,529 psi | 73% | 2881 fps | 99.1% |
| IMR 7977 Enduron | <<locked>> | 88% | 53,447 psi | 82% | 2887 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 82% | 33,678 psi | 52% | 2579 fps | 95.2% |
| Lovex S071 | <<locked>> | 80% | 42,554 psi | 65% | 2687 fps | 100% |
| Norma 217 | <<locked>> | 80% | 31,865 psi | 49% | 2543 fps | 96.7% |
| Norma MRP | <<locked>> | 80% | 52,895 psi | 81% | 2972 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 48,283 psi | 74% | 2904 fps | 99.4% |
| Ramshot Magnum | <<locked>> | 80% | 43,584 psi | 67% | 2769 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,457 psi | 45% | 1775 fps | 100% |
| ReloadSwiss RS 76 | 71.7 gr | 80% | 41,176 psi | 63% | 2812 fps | 99.9% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 37,942 psi | 58% | 2694 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 53,737 psi | 83% | 2920 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 80% | 52,953 psi | 81% | 2933 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 46,920 psi | 72% | 2838 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 52,605 psi | 81% | 2927 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 54,911 psi | 85% | 2910 fps | 99.6% |
| Somchem S385 | <<locked>> | 80% | 53,113 psi | 82% | 2900 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 46,746 psi | 72% | 2779 fps | 99.8% |
| Vihtavuori N170 | <<locked>> | 86% | 49,211 psi | 76% | 2851 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 80% | 53,026 psi | 82% | 2900 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 52,214 psi | 80% | 2976 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 80% | 43,816 psi | 67% | 2785 fps | 98.1% |
| Vihtavuori N568 | <<locked>> | 80% | 38,943 psi | 60% | 2713 fps | 95.3% |
| Vihtavuori N570 | <<locked>> | 86% | 46,064 psi | 71% | 2907 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 48,298 psi | 74% | 2897 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 49,255 psi | 76% | 2835 fps | 99.8% |
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 52 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 139gr | Lapua Scenar. ADI AR 2218 delivers the highest muzzle velocity at 3,143 fps; across all powders the maximum-charge window runs from 1,939 fps to 3,143 fps. Accurate 8700 gives the best case fill at 100 %, and 52 of the 52 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 139.0 gr projectile in 0.264" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, ReloadSwiss RS 14 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. ADI AR 2218, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 139gr | Lapua Scenar 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.