Load Specifications
Load data in caliber .264 Win. Mag. with .264 | 140gr | Speer Grand Slam bullet and 56 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, 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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 88% | 54,433 psi | 87% | 2913 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 53,345 psi | 86% | 3018 fps | 99% |
| ADI AR 2209 | <<locked>> | 86% | 55,941 psi | 90% | 3005 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 54,041 psi | 87% | 3015 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 98% | 56,231 psi | 90% | 3048 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 52,431 psi | 84% | 3091 fps | 97.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 54,752 psi | 88% | 3071 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 56,057 psi | 90% | 2999 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 56,086 psi | 90% | 2986 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 55,448 psi | 89% | 2992 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 54,505 psi | 87% | 3009 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 56,362 psi | 90% | 2972 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 56,159 psi | 90% | 3045 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 52,939 psi | 85% | 3005 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 53,853 psi | 86% | 3081 fps | 97.8% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 49,298 psi | 79% | 2989 fps | 96.3% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 54,708 psi | 88% | 2972 fps | 98% |
| Bofors RP15 | <<locked>> | 90% | 54,027 psi | 87% | 3002 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 55,941 psi | 90% | 3061 fps | 99.9% |
| Bofors RP5 | <<locked>> | 88% | 54,505 psi | 87% | 3009 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 54,041 psi | 87% | 3012 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 53,519 psi | 86% | 2949 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 88% | 56,043 psi | 90% | 2989 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 56,202 psi | 90% | 2904 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 55,288 psi | 89% | 3136 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,724 psi | 60% | 1890 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 54,665 psi | 88% | 2920 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 55,390 psi | 89% | 2923 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 54,157 psi | 87% | 2927 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 90% | 56,101 psi | 90% | 3054 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 50,024 psi | 80% | 2986 fps | 99.5% |
| Lovex S071 | <<locked>> | 94% | 56,260 psi | 90% | 2940 fps | 100% |
| Norma 204 | <<locked>> | 82% | 55,680 psi | 89% | 2976 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 50,981 psi | 82% | 3009 fps | 100% |
| Norma MRP | <<locked>> | 86% | 54,592 psi | 88% | 3028 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 53,287 psi | 85% | 3018 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 55,666 psi | 89% | 2972 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 55,680 psi | 89% | 3005 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,551 psi | 62% | 1932 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 55,898 psi | 90% | 3123 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 55,158 psi | 88% | 3084 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 86% | 56,420 psi | 90% | 2969 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 86% | 55,071 psi | 88% | 2982 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 54,679 psi | 88% | 2976 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 54,317 psi | 87% | 2904 fps | 99.3% |
| Somchem S365 | <<locked>> | 82% | 54,462 psi | 87% | 2913 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 55,622 psi | 89% | 2953 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 55,492 psi | 89% | 2940 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 54,244 psi | 87% | 2953 fps | 96.3% |
| Vihtavuori N555 | <<locked>> | 86% | 54,636 psi | 88% | 2946 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 54,128 psi | 87% | 3028 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 92% | 54,868 psi | 88% | 3022 fps | 99.6% |
| Vihtavuori N568 | <<locked>> | 96% | 55,999 psi | 90% | 3091 fps | 99.2% |
| Vihtavuori N570 | <<locked>> | 96% | 53,084 psi | 85% | 3084 fps | 97.3% |
| Winchester StaBALL HD | <<locked>> | 90% | 55,738 psi | 89% | 3061 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 55,390 psi | 89% | 2949 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 41,684 psi | 67% | 2690 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 80% | 43,076 psi | 69% | 2822 fps | 97% |
| ADI AR 2209 | <<locked>> | 80% | 45,701 psi | 73% | 2825 fps | 99.3% |
| ADI AR 2213 | <<locked>> | 80% | 40,915 psi | 66% | 2762 fps | 97.5% |
| ADI AR 2217 | <<locked>> | 84% | 34,940 psi | 56% | 2618 fps | 95.8% |
| ADI AR 2218 | <<locked>> | 96% | 45,440 psi | 73% | 2946 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 80% | 27,934 psi | 45% | 2461 fps | 95.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 46,064 psi | 74% | 2825 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 80% | 52,489 psi | 84% | 2930 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 45,629 psi | 73% | 2818 fps | 99.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 41,597 psi | 67% | 2769 fps | 98.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 40,495 psi | 65% | 2713 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 34,925 psi | 56% | 2648 fps | 99.6% |
| Alliant Reloder-26 | <<locked>> | 80% | 45,542 psi | 73% | 2881 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 46,311 psi | 74% | 2936 fps | 96% |
| Alliant Reloder-50 | <<locked>> | 98% | 45,803 psi | 73% | 2920 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 45,324 psi | 73% | 2795 fps | 95.8% |
| Bofors RP15 | <<locked>> | 80% | 38,798 psi | 62% | 2703 fps | 97.9% |
| Bofors RP30 | <<locked>> | 82% | 34,737 psi | 56% | 2635 fps | 95.9% |
| Bofors RP5 | <<locked>> | 80% | 41,597 psi | 67% | 2769 fps | 98.7% |
| Hodgdon H1000 | <<locked>> | 80% | 33,228 psi | 53% | 2572 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 80% | 43,555 psi | 70% | 2762 fps | 97.5% |
| Hodgdon H4831 SC | <<locked>> | 80% | 42,743 psi | 69% | 2746 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 49,313 psi | 79% | 2802 fps | 100% |
| Hodgdon Retumbo | 57.4 gr | 80% | 34,055 psi | 55% | 2680 fps | 97.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,166 psi | 45% | 1686 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 51,358 psi | 82% | 2864 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 51,735 psi | 83% | 2867 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 44,715 psi | 72% | 2756 fps | 97.9% |
| IMR 7828 SSC | <<locked>> | 80% | 39,798 psi | 64% | 2746 fps | 97.2% |
| IMR 8133 Enduron | <<locked>> | 88% | 33,431 psi | 54% | 2621 fps | 95.2% |
| Lovex S071 | <<locked>> | 80% | 35,969 psi | 58% | 2569 fps | 99.1% |
| Norma 204 | <<locked>> | 80% | 52,228 psi | 84% | 2920 fps | 99.8% |
| Norma 217 | <<locked>> | 84% | 29,341 psi | 47% | 2526 fps | 95.7% |
| Norma MRP | <<locked>> | 80% | 44,150 psi | 71% | 2841 fps | 99.8% |
| Ramshot Grand | <<locked>> | 80% | 39,610 psi | 64% | 2753 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 80% | 52,272 psi | 84% | 2920 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 35,592 psi | 57% | 2631 fps | 98% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,950 psi | 46% | 1729 fps | 100% |
| ReloadSwiss RS 76 | 61.5 gr | 80% | 33,315 psi | 53% | 2657 fps | 98.2% |
| ReloadSwiss RS 80 | <<locked>> | 86% | 37,811 psi | 61% | 2743 fps | 95.5% |
| Rottweil R 904 | <<locked>> | 80% | 46,601 psi | 75% | 2795 fps | 98.7% |
| Rottweil R 905 | <<locked>> | 80% | 45,266 psi | 73% | 2808 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 44,918 psi | 72% | 2802 fps | 99.2% |
| Somchem S361 | <<locked>> | 80% | 47,427 psi | 76% | 2785 fps | 98.3% |
| Somchem S365 | <<locked>> | 80% | 50,966 psi | 82% | 2864 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 45,600 psi | 73% | 2779 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 80% | 39,827 psi | 64% | 2657 fps | 98.7% |
| Vihtavuori N170 | <<locked>> | 92% | 50,691 psi | 81% | 2890 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 80% | 44,976 psi | 72% | 2789 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 43,918 psi | 70% | 2838 fps | 97.8% |
| Vihtavuori N565 | <<locked>> | 80% | 36,477 psi | 58% | 2651 fps | 95.7% |
| Vihtavuori N568 | <<locked>> | 86% | 39,175 psi | 63% | 2762 fps | 95.3% |
| Vihtavuori N570 | 68.5 gr | 92% | 45,934 psi | 74% | 2946 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 38,218 psi | 61% | 2769 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 41,959 psi | 67% | 2710 fps | 98.7% |
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 56 powders for .264 Win. Mag. loaded with the .264 | 140gr | Speer Grand Slam. Hodgdon Retumbo delivers the highest muzzle velocity at 3,136 fps; across all powders the maximum-charge window runs from 1,890 fps to 3,136 fps. ADI AR 2218 gives the best case fill at 100 %, and 56 of the 56 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.264" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Alliant Reloder-50 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, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for .264 Win. Mag. with the .264 | 140gr | Speer Grand Slam 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.