Load Specifications
Load data in caliber 6.5-300 Weatherby Mag. with .264 | 140gr | Peregrine Bushmaster (VRG-3) Hybrid bullet and 51 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>> | 84% | 55,869 psi | 86% | 2910 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 51,982 psi | 80% | 2946 fps | 97.3% |
| Accurate High Country | <<locked>> | 82% | 58,218 psi | 90% | 3074 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 55,332 psi | 85% | 3022 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 82% | 57,217 psi | 88% | 3005 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 56,057 psi | 86% | 3018 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 92% | 55,535 psi | 85% | 3009 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 56,347 psi | 87% | 3136 fps | 98.9% |
| ADI AR 2225 | <<locked>> | 94% | 55,347 psi | 85% | 3028 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 56,579 psi | 87% | 2989 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 56,507 psi | 87% | 3015 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 58,494 psi | 90% | 2969 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 55,753 psi | 86% | 2995 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 58,291 psi | 90% | 3107 fps | 98.9% |
| Alliant Reloder-50 | <<locked>> | 98% | 58,291 psi | 90% | 3097 fps | 98.5% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 56,289 psi | 87% | 2982 fps | 98.8% |
| Bofors RP15 | <<locked>> | 86% | 55,970 psi | 86% | 3005 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 55,535 psi | 85% | 3015 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 56,507 psi | 87% | 3015 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 56,942 psi | 88% | 3025 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 58,537 psi | 90% | 3015 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 84% | 57,392 psi | 88% | 2995 fps | 99.8% |
| Hodgdon Retumbo | <<locked>> | 88% | 55,550 psi | 85% | 3087 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,014 psi | 59% | 1936 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 58,247 psi | 90% | 2986 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 86% | 58,581 psi | 90% | 3068 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 57,116 psi | 88% | 2943 fps | 96.1% |
| IMR 8133 Enduron | <<locked>> | 98% | 58,088 psi | 89% | 3071 fps | 100% |
| Lovex S071 | <<locked>> | 90% | 58,146 psi | 89% | 2946 fps | 100% |
| Norma 217 | <<locked>> | 96% | 55,608 psi | 86% | 3031 fps | 100% |
| Norma MRP | <<locked>> | 82% | 56,594 psi | 87% | 3022 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 56,144 psi | 86% | 3028 fps | 100% |
| Ramshot Magnum | <<locked>> | 88% | 58,624 psi | 90% | 3015 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,943 psi | 60% | 1982 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 56,333 psi | 87% | 3074 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 55,071 psi | 85% | 3035 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 82% | 57,348 psi | 88% | 2972 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 56,521 psi | 87% | 2982 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 53,780 psi | 83% | 2959 fps | 97.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 56,159 psi | 86% | 2979 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 58,682 psi | 90% | 2963 fps | 99.9% |
| Somchem S385 | <<locked>> | 82% | 56,666 psi | 87% | 2949 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 56,884 psi | 88% | 2940 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 56,246 psi | 87% | 2972 fps | 97.4% |
| Vihtavuori N555 | <<locked>> | 82% | 56,391 psi | 87% | 2946 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 55,912 psi | 86% | 3028 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 88% | 57,290 psi | 88% | 3028 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 90% | 55,579 psi | 86% | 3041 fps | 99.4% |
| Vihtavuori N570 | <<locked>> | 92% | 57,334 psi | 88% | 3114 fps | 98.4% |
| Winchester StaBALL HD | <<locked>> | 84% | 55,912 psi | 86% | 3005 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 56,463 psi | 87% | 2949 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% | 48,733 psi | 75% | 2795 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 44,759 psi | 69% | 2812 fps | 95.3% |
| Accurate High Country | <<locked>> | 80% | 54,404 psi | 84% | 3009 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 80% | 51,517 psi | 79% | 2953 fps | 99% |
| ADI AR 2209 | <<locked>> | 80% | 53,417 psi | 82% | 2940 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 48,718 psi | 75% | 2890 fps | 99.3% |
| ADI AR 2217 | <<locked>> | 80% | 36,216 psi | 56% | 2618 fps | 96.7% |
| ADI AR 2218 | 81.1 gr | 90% | 44,846 psi | 69% | 2904 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 80% | 33,446 psi | 51% | 2585 fps | 98.4% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,968 psi | 82% | 2927 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 49,342 psi | 76% | 2890 fps | 99.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 48,051 psi | 74% | 2808 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 42,235 psi | 65% | 2759 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 43,062 psi | 66% | 2812 fps | 95.1% |
| Alliant Reloder-50 | <<locked>> | 92% | 46,383 psi | 71% | 2874 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 46,064 psi | 71% | 2795 fps | 96.7% |
| Bofors RP15 | <<locked>> | 80% | 45,847 psi | 71% | 2822 fps | 99.5% |
| Bofors RP30 | <<locked>> | 80% | 39,160 psi | 60% | 2694 fps | 97.6% |
| Bofors RP5 | <<locked>> | 80% | 49,342 psi | 76% | 2890 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 80% | 39,552 psi | 61% | 2703 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 80% | 50,894 psi | 78% | 2887 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 50,067 psi | 77% | 2871 fps | 99.1% |
| Hodgdon Retumbo | 68 gr | 80% | 41,365 psi | 64% | 2818 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,543 psi | 44% | 1732 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 51,343 psi | 79% | 2867 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 80% | 47,398 psi | 73% | 2871 fps | 99.1% |
| IMR 7977 Enduron | <<locked>> | 88% | 53,432 psi | 82% | 2881 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 82% | 33,228 psi | 51% | 2556 fps | 95% |
| Lovex S071 | <<locked>> | 80% | 42,047 psi | 65% | 2671 fps | 99.9% |
| Norma 217 | <<locked>> | 80% | 31,372 psi | 48% | 2520 fps | 96.5% |
| Norma MRP | <<locked>> | 80% | 52,837 psi | 81% | 2963 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 48,298 psi | 74% | 2894 fps | 99.5% |
| Ramshot Magnum | <<locked>> | 80% | 43,395 psi | 67% | 2756 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,269 psi | 45% | 1772 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 41,017 psi | 63% | 2792 fps | 99.9% |
| ReloadSwiss RS 80 | 73.4 gr | 80% | 37,565 psi | 58% | 2674 fps | 95.3% |
| Rottweil R 904 | <<locked>> | 80% | 53,664 psi | 83% | 2913 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 80% | 52,779 psi | 81% | 2920 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 46,644 psi | 72% | 2825 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 52,446 psi | 81% | 2920 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 54,882 psi | 84% | 2904 fps | 99.7% |
| Somchem S385 | <<locked>> | 80% | 53,055 psi | 82% | 2890 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 46,514 psi | 72% | 2766 fps | 99.8% |
| Vihtavuori N170 | <<locked>> | 86% | 49,095 psi | 76% | 2841 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 80% | 52,707 psi | 81% | 2887 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 52,257 psi | 80% | 2966 fps | 99.5% |
| Vihtavuori N565 | <<locked>> | 80% | 43,540 psi | 67% | 2772 fps | 98.1% |
| Vihtavuori N568 | <<locked>> | 80% | 38,537 psi | 59% | 2694 fps | 95.1% |
| Vihtavuori N570 | <<locked>> | 86% | 46,035 psi | 71% | 2897 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 48,022 psi | 74% | 2881 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 49,240 psi | 76% | 2828 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 51 powders for 6.5-300 Weatherby Mag. loaded with the .264 | 140gr | Peregrine Bushmaster (VRG-3) Hybrid. ADI AR 2218 delivers the highest muzzle velocity at 3,136 fps; across all powders the maximum-charge window runs from 1,936 fps to 3,136 fps. Accurate 8700 gives the best case fill at 100 %, and 51 of the 51 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 140.0 gr projectile in 0.264" calls for a 1:9.5 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. Hodgdon Retumbo, ADI AR 2218, ReloadSwiss RS 80 rank at the top here: for 6.5-300 Weatherby Mag. with the .264 | 140gr | Peregrine Bushmaster (VRG-3) Hybrid 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.