Load Specifications
Load data in caliber .264 Win. Mag. with .263 | 139gr | Prvi Partizan SP BT bullet and 60 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 80 and Vihtavuori N570.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 88% | 53,069 psi | 85% | 2900 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 55,550 psi | 89% | 3061 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 86% | 54,534 psi | 87% | 2989 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 90% | 56,391 psi | 90% | 3061 fps | 99.8% |
| ADI AR 2217 | <<locked>> | 98% | 54,694 psi | 88% | 3031 fps | 99.8% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 50,923 psi | 82% | 3068 fps | 97% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 52,924 psi | 85% | 3051 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 54,708 psi | 88% | 2986 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 82% | 54,766 psi | 88% | 2976 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 54,114 psi | 87% | 2976 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 88% | 53,127 psi | 85% | 2995 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 90% | 54,882 psi | 88% | 2963 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 54,679 psi | 88% | 3031 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 55,332 psi | 89% | 3051 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 56,115 psi | 90% | 3123 fps | 98.1% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 53,679 psi | 86% | 2959 fps | 97.7% |
| Bofors RP15 | <<locked>> | 92% | 55,941 psi | 90% | 3041 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 54,549 psi | 87% | 3045 fps | 99.8% |
| Bofors RP5 | <<locked>> | 88% | 53,127 psi | 85% | 2995 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 96% | 56,289 psi | 90% | 3054 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 55,767 psi | 89% | 2989 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 88% | 54,737 psi | 88% | 2972 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 54,969 psi | 88% | 2894 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 53,548 psi | 86% | 3117 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,492 psi | 60% | 1886 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 53,592 psi | 86% | 2907 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 54,215 psi | 87% | 2913 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,391 psi | 90% | 2972 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 90% | 54,679 psi | 88% | 3041 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,472 psi | 78% | 2963 fps | 99.2% |
| Lovex S070 | <<locked>> | 82% | 55,753 psi | 89% | 2940 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 54,868 psi | 88% | 2927 fps | 100% |
| Norma 204 | <<locked>> | 82% | 54,592 psi | 88% | 2966 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 49,327 psi | 79% | 2992 fps | 100% |
| Norma MRP | <<locked>> | 86% | 53,171 psi | 85% | 3015 fps | 100% |
| Norma URP | <<locked>> | 82% | 55,622 psi | 89% | 2953 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 55,608 psi | 89% | 3061 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 54,505 psi | 87% | 2966 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 54,027 psi | 87% | 2989 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,508 psi | 62% | 1932 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,159 psi | 90% | 3028 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 54,230 psi | 87% | 3107 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 53,563 psi | 86% | 3068 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 86% | 55,390 psi | 89% | 2956 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 86% | 53,954 psi | 87% | 2969 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 82% | 55,753 psi | 89% | 2940 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,420 psi | 90% | 2894 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 53,563 psi | 86% | 2966 fps | 99.9% |
| Somchem S361 | <<locked>> | 84% | 53,156 psi | 85% | 2890 fps | 99.1% |
| Somchem S365 | <<locked>> | 82% | 53,142 psi | 85% | 2904 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 54,302 psi | 87% | 2936 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 53,954 psi | 87% | 2923 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 56,420 psi | 90% | 2953 fps | 100% |
| Vihtavuori N555 | <<locked>> | 86% | 53,432 psi | 86% | 2940 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 56,347 psi | 90% | 3074 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 92% | 53,272 psi | 85% | 3002 fps | 99.4% |
| Vihtavuori N568 | <<locked>> | 96% | 54,128 psi | 87% | 3068 fps | 98.8% |
| Vihtavuori N570 | <<locked>> | 98% | 55,158 psi | 88% | 3130 fps | 97.6% |
| Winchester StaBALL HD | <<locked>> | 90% | 53,983 psi | 87% | 3051 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 53,867 psi | 86% | 2930 fps | 99.9% |
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% | 40,596 psi | 65% | 2677 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 80% | 42,003 psi | 67% | 2805 fps | 96.5% |
| ADI AR 2209 | <<locked>> | 80% | 44,614 psi | 72% | 2808 fps | 99% |
| ADI AR 2213 | <<locked>> | 80% | 39,900 psi | 64% | 2746 fps | 97% |
| ADI AR 2217 | <<locked>> | 84% | 34,084 psi | 55% | 2598 fps | 95.1% |
| ADI AR 2218 | <<locked>> | 98% | 47,355 psi | 76% | 2992 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 82% | 29,022 psi | 47% | 2503 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 44,976 psi | 72% | 2808 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,430 psi | 82% | 2923 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,570 psi | 71% | 2802 fps | 99% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,524 psi | 65% | 2753 fps | 98.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,349 psi | 63% | 2700 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,953 psi | 54% | 2631 fps | 99.3% |
| Alliant Reloder-26 | <<locked>> | 80% | 44,063 psi | 71% | 2864 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 44,715 psi | 72% | 2913 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 44,396 psi | 71% | 2779 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 37,782 psi | 61% | 2687 fps | 97.5% |
| Bofors RP30 | <<locked>> | 82% | 33,707 psi | 54% | 2615 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 40,524 psi | 65% | 2753 fps | 98.3% |
| Hodgdon H1000 | <<locked>> | 80% | 32,387 psi | 52% | 2556 fps | 95% |
| Hodgdon H4831 | <<locked>> | 80% | 42,540 psi | 68% | 2746 fps | 97.1% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,756 psi | 67% | 2730 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,327 psi | 77% | 2795 fps | 100% |
| Hodgdon Retumbo | 56.4 gr | 80% | 33,141 psi | 53% | 2661 fps | 96.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,166 psi | 45% | 1686 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,299 psi | 81% | 2854 fps | 99.9% |
| IMR 4831 | <<locked>> | 80% | 50,807 psi | 81% | 2861 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,787 psi | 70% | 2740 fps | 97.5% |
| IMR 7828 SSC | <<locked>> | 80% | 38,769 psi | 62% | 2726 fps | 96.7% |
| IMR 8133 Enduron | <<locked>> | 90% | 34,606 psi | 55% | 2661 fps | 95.6% |
| Lovex S070 | <<locked>> | 80% | 52,344 psi | 84% | 2884 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 35,114 psi | 56% | 2556 fps | 98.9% |
| Norma 204 | <<locked>> | 80% | 51,097 psi | 82% | 2907 fps | 99.7% |
| Norma 217 | <<locked>> | 86% | 30,342 psi | 49% | 2562 fps | 96% |
| Norma MRP | <<locked>> | 80% | 43,018 psi | 69% | 2828 fps | 99.6% |
| Norma URP | <<locked>> | 80% | 52,083 psi | 84% | 2900 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,566 psi | 62% | 2736 fps | 97.1% |
| Ramshot Hunter | <<locked>> | 80% | 51,126 psi | 82% | 2910 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,476 psi | 55% | 2612 fps | 97.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,950 psi | 46% | 1729 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,214 psi | 84% | 2969 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 32,285 psi | 52% | 2635 fps | 97.6% |
| ReloadSwiss RS 80 | 67 gr | 88% | 39,494 psi | 63% | 2792 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 45,556 psi | 73% | 2782 fps | 98.4% |
| Rottweil R 905 | <<locked>> | 80% | 44,150 psi | 71% | 2792 fps | 99% |
| Shooters World SW4350 | <<locked>> | 80% | 52,344 psi | 84% | 2884 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,692 psi | 84% | 2835 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,801 psi | 70% | 2789 fps | 99% |
| Somchem S361 | <<locked>> | 80% | 46,528 psi | 75% | 2776 fps | 98% |
| Somchem S365 | <<locked>> | 80% | 49,676 psi | 80% | 2851 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,541 psi | 71% | 2766 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 80% | 38,856 psi | 62% | 2641 fps | 98.3% |
| Vihtavuori N550 | <<locked>> | 80% | 52,765 psi | 85% | 2894 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,801 psi | 70% | 2776 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,844 psi | 69% | 2822 fps | 97.3% |
| Vihtavuori N565 | <<locked>> | 80% | 35,491 psi | 57% | 2635 fps | 95.2% |
| Vihtavuori N568 | <<locked>> | 88% | 40,857 psi | 66% | 2808 fps | 95.7% |
| Vihtavuori N570 | 68.8 gr | 94% | 47,834 psi | 77% | 2992 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,869 psi | 59% | 2753 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,973 psi | 66% | 2697 fps | 98.4% |
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 60 powders for .264 Win. Mag. loaded with the .263 | 139gr | Prvi Partizan SP BT. Vihtavuori N570 delivers the highest muzzle velocity at 3,130 fps; across all powders the maximum-charge window runs from 1,886 fps to 3,130 fps. ADI AR 2218 gives the best case fill at 100 %, and 60 of the 60 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 139.0 gr projectile in 0.263" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Alliant Reloder-33 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, ReloadSwiss RS 80, Vihtavuori N570 rank at the top here: for .264 Win. Mag. with the .263 | 139gr | Prvi Partizan SP BT 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.