Load Specifications
Load data in caliber .264 Win. Mag. with .263 | 156gr | Prvi Partizan SP RN bullet and 52 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: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 86% | 53,911 psi | 86% | 2759 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 52,765 psi | 85% | 2867 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 84% | 55,114 psi | 88% | 2844 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 53,330 psi | 86% | 2858 fps | 99.9% |
| ADI AR 2217 | <<locked>> | 96% | 55,782 psi | 89% | 2897 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 55,869 psi | 90% | 3022 fps | 99.2% |
| ADI AR 2225 | <<locked>> | 98% | 54,607 psi | 88% | 2920 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 55,259 psi | 89% | 2841 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 54,694 psi | 88% | 2831 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 53,896 psi | 86% | 2854 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 55,956 psi | 90% | 2815 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 55,999 psi | 90% | 2887 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 52,446 psi | 84% | 2848 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 53,679 psi | 86% | 2936 fps | 98.6% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 53,200 psi | 85% | 2927 fps | 98.2% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 53,940 psi | 86% | 2825 fps | 98.7% |
| Bofors RP15 | <<locked>> | 88% | 53,403 psi | 86% | 2844 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 55,637 psi | 89% | 2910 fps | 100% |
| Bofors RP5 | <<locked>> | 86% | 53,896 psi | 86% | 2854 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 53,519 psi | 86% | 2861 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 56,202 psi | 90% | 2848 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 86% | 55,114 psi | 88% | 2831 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 55,637 psi | 89% | 2746 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 55,187 psi | 88% | 2979 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,855 psi | 61% | 1785 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 53,243 psi | 85% | 2772 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 88% | 55,535 psi | 89% | 2900 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 92% | 55,201 psi | 89% | 2776 fps | 95.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 53,664 psi | 86% | 2900 fps | 100% |
| Lovex S071 | <<locked>> | 92% | 55,753 psi | 89% | 2785 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 54,926 psi | 88% | 2923 fps | 100% |
| Norma MRP | <<locked>> | 84% | 53,853 psi | 86% | 2867 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 52,997 psi | 85% | 2864 fps | 100% |
| Ramshot Magnum | <<locked>> | 90% | 55,100 psi | 88% | 2851 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,725 psi | 62% | 1827 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 55,680 psi | 89% | 2966 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 55,056 psi | 88% | 2943 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 84% | 55,666 psi | 89% | 2812 fps | 100% |
| Rottweil R 905 | <<locked>> | 84% | 54,592 psi | 88% | 2825 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 46,369 psi | 74% | 2730 fps | 96.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 54,215 psi | 87% | 2822 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 53,200 psi | 85% | 2749 fps | 99.7% |
| Somchem S385 | <<locked>> | 84% | 54,665 psi | 88% | 2792 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 54,737 psi | 88% | 2782 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 53,534 psi | 86% | 2808 fps | 97.2% |
| Vihtavuori N555 | <<locked>> | 84% | 54,302 psi | 87% | 2792 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 53,359 psi | 86% | 2871 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 90% | 54,418 psi | 87% | 2871 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 94% | 55,550 psi | 89% | 2940 fps | 99.6% |
| Vihtavuori N570 | <<locked>> | 94% | 53,055 psi | 85% | 2943 fps | 98.3% |
| Winchester StaBALL HD | <<locked>> | 88% | 55,941 psi | 90% | 2907 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 54,563 psi | 87% | 2792 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% | 44,150 psi | 71% | 2605 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 45,759 psi | 73% | 2740 fps | 98.5% |
| ADI AR 2209 | <<locked>> | 80% | 48,167 psi | 77% | 2730 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 80% | 43,366 psi | 70% | 2680 fps | 98.9% |
| ADI AR 2217 | <<locked>> | 80% | 32,387 psi | 52% | 2431 fps | 96% |
| ADI AR 2218 | <<locked>> | 92% | 41,858 psi | 67% | 2743 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 80% | 29,733 psi | 48% | 2408 fps | 98% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 48,486 psi | 78% | 2730 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 48,037 psi | 77% | 2723 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 80% | 44,135 psi | 71% | 2684 fps | 99.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,975 psi | 69% | 2618 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 37,202 psi | 60% | 2569 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 48,733 psi | 78% | 2789 fps | 100% |
| Alliant Reloder-33 | 66.3 gr | 88% | 39,929 psi | 64% | 2674 fps | 95.2% |
| Alliant Reloder-50 | <<locked>> | 94% | 42,598 psi | 68% | 2730 fps | 95.5% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 41,771 psi | 67% | 2595 fps | 96% |
| Bofors RP15 | <<locked>> | 80% | 41,147 psi | 66% | 2625 fps | 99.2% |
| Bofors RP30 | <<locked>> | 80% | 34,737 psi | 56% | 2510 fps | 97.1% |
| Bofors RP5 | <<locked>> | 80% | 44,135 psi | 71% | 2684 fps | 99.6% |
| Hodgdon H1000 | <<locked>> | 80% | 35,273 psi | 57% | 2510 fps | 97.8% |
| Hodgdon H4831 | <<locked>> | 80% | 45,992 psi | 74% | 2677 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 45,136 psi | 72% | 2661 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 52,040 psi | 83% | 2694 fps | 100% |
| Hodgdon Retumbo | 55.8 gr | 80% | 36,376 psi | 58% | 2618 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,398 psi | 46% | 1594 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,862 psi | 75% | 2664 fps | 99.1% |
| IMR 7828 SSC | <<locked>> | 80% | 42,308 psi | 68% | 2667 fps | 98.8% |
| IMR 7977 Enduron | <<locked>> | 90% | 51,721 psi | 83% | 2720 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 84% | 31,212 psi | 50% | 2444 fps | 95.5% |
| Lovex S071 | <<locked>> | 80% | 38,159 psi | 61% | 2487 fps | 99.9% |
| Norma 217 | <<locked>> | 80% | 27,514 psi | 44% | 2352 fps | 96.1% |
| Norma MRP | <<locked>> | 80% | 46,876 psi | 75% | 2753 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 42,482 psi | 68% | 2684 fps | 99.1% |
| Ramshot Magnum | <<locked>> | 80% | 38,101 psi | 61% | 2559 fps | 99.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,240 psi | 47% | 1634 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 35,665 psi | 57% | 2598 fps | 99.6% |
| ReloadSwiss RS 80 | <<locked>> | 82% | 34,983 psi | 56% | 2552 fps | 95.6% |
| Rottweil R 904 | <<locked>> | 80% | 48,878 psi | 78% | 2703 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 80% | 47,747 psi | 77% | 2713 fps | 99.9% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 43,337 psi | 69% | 2674 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 47,398 psi | 76% | 2710 fps | 99.9% |
| Somchem S361 | <<locked>> | 80% | 49,980 psi | 80% | 2697 fps | 99.4% |
| Somchem S385 | <<locked>> | 80% | 48,066 psi | 77% | 2687 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 42,076 psi | 67% | 2572 fps | 99.6% |
| Vihtavuori N170 | <<locked>> | 88% | 46,847 psi | 75% | 2690 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 80% | 47,572 psi | 76% | 2690 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,499 psi | 75% | 2753 fps | 99.1% |
| Vihtavuori N565 | <<locked>> | 80% | 38,754 psi | 62% | 2579 fps | 97.6% |
| Vihtavuori N568 | <<locked>> | 82% | 36,390 psi | 58% | 2572 fps | 95.5% |
| Vihtavuori N570 | 63.7 gr | 88% | 42,728 psi | 69% | 2746 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 41,365 psi | 66% | 2684 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 44,396 psi | 71% | 2625 fps | 99.6% |
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 52 powders for .264 Win. Mag. loaded with the .263 | 156gr | Prvi Partizan SP RN. ADI AR 2218 delivers the highest muzzle velocity at 3,022 fps; across all powders the maximum-charge window runs from 1,785 fps to 3,022 fps. ADI AR 2218 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 (430 MPa), the top charges use 61–90 %, leaving at least 10 % headroom. The 156.0 gr projectile in 0.263" calls for a 1:10.5 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 .264 Win. Mag. with the .263 | 156gr | Prvi Partizan SP RN 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.