Load Specifications
Load data in caliber .26 Nosler with .263 | 139gr | Prvi Partizan FMJ BT bullet and 49 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Vihtavuori N570 and Alliant Reloder-50.
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% | 57,580 psi | 89% | 2959 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 53,563 psi | 82% | 2995 fps | 97.7% |
| Accurate MAGPRO | <<locked>> | 82% | 56,724 psi | 87% | 3068 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 82% | 58,276 psi | 90% | 3045 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 57,101 psi | 88% | 3061 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 57,000 psi | 88% | 3051 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 57,609 psi | 89% | 3182 fps | 99.1% |
| ADI AR 2225 | <<locked>> | 94% | 56,855 psi | 87% | 3074 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 57,653 psi | 89% | 3028 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 57,682 psi | 89% | 3054 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,159 psi | 86% | 2959 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 57,130 psi | 88% | 3038 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 55,637 psi | 86% | 3087 fps | 98.5% |
| Alliant Reloder-50 | <<locked>> | 96% | 56,028 psi | 86% | 3081 fps | 98.1% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 57,174 psi | 88% | 3022 fps | 98.9% |
| Bofors RP15 | <<locked>> | 86% | 57,319 psi | 88% | 3048 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 56,956 psi | 88% | 3061 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 57,682 psi | 89% | 3054 fps | 100% |
| Hodgdon H1000 | <<locked>> | 90% | 58,378 psi | 90% | 3068 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,724 psi | 86% | 2992 fps | 99.7% |
| Hodgdon H4831 SC | <<locked>> | 84% | 58,378 psi | 90% | 3031 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 88% | 56,985 psi | 88% | 3133 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,087 psi | 59% | 1955 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,767 psi | 86% | 2966 fps | 99.8% |
| IMR 7828 SSC | <<locked>> | 84% | 55,970 psi | 86% | 3048 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 90% | 58,102 psi | 89% | 2982 fps | 96.3% |
| IMR 8133 Enduron | <<locked>> | 96% | 55,825 psi | 86% | 3058 fps | 100% |
| Lovex S071 | <<locked>> | 88% | 56,014 psi | 86% | 2933 fps | 100% |
| Norma 217 | <<locked>> | 96% | 57,363 psi | 88% | 3081 fps | 100% |
| Norma MRP | <<locked>> | 82% | 58,030 psi | 89% | 3068 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 57,537 psi | 89% | 3074 fps | 100% |
| Ramshot Magnum | <<locked>> | 86% | 55,941 psi | 86% | 2999 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,233 psi | 60% | 2005 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 57,725 psi | 89% | 3117 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 56,898 psi | 88% | 3091 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 82% | 58,378 psi | 90% | 3012 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 57,696 psi | 89% | 3025 fps | 100% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 55,405 psi | 85% | 3005 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 57,334 psi | 88% | 3018 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 57,899 psi | 89% | 2989 fps | 100% |
| Vihtavuori N165 | <<locked>> | 86% | 58,189 psi | 90% | 2982 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 57,696 psi | 89% | 3018 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 82% | 57,856 psi | 89% | 2989 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 57,246 psi | 88% | 3074 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 88% | 58,755 psi | 90% | 3074 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 57,130 psi | 88% | 3091 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 90% | 54,810 psi | 84% | 3091 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 84% | 57,595 psi | 89% | 3051 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 57,740 psi | 89% | 2989 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% | 50,241 psi | 77% | 2841 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 46,151 psi | 71% | 2858 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 80% | 52,939 psi | 81% | 3002 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 80% | 54,534 psi | 84% | 2982 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 49,835 psi | 77% | 2933 fps | 99.4% |
| ADI AR 2217 | <<locked>> | 80% | 37,391 psi | 58% | 2671 fps | 97.2% |
| ADI AR 2218 | 80.4 gr | 88% | 42,786 psi | 66% | 2874 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 80% | 34,679 psi | 53% | 2638 fps | 98.9% |
| Alliant Reloder-19 | <<locked>> | 80% | 54,085 psi | 83% | 2969 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 50,575 psi | 78% | 2933 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,182 psi | 76% | 2851 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 43,540 psi | 67% | 2805 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 44,440 psi | 68% | 2867 fps | 95.7% |
| Alliant Reloder-50 | 83.5 gr | 90% | 44,831 psi | 69% | 2864 fps | 95.2% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 47,094 psi | 72% | 2838 fps | 97% |
| Bofors RP15 | <<locked>> | 80% | 47,094 psi | 72% | 2864 fps | 99.6% |
| Bofors RP30 | <<locked>> | 80% | 40,538 psi | 62% | 2746 fps | 98% |
| Bofors RP5 | <<locked>> | 80% | 50,575 psi | 78% | 2933 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 40,712 psi | 63% | 2749 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 80% | 51,967 psi | 80% | 2927 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,169 psi | 79% | 2910 fps | 99.3% |
| Hodgdon Retumbo | <<locked>> | 80% | 42,656 psi | 66% | 2871 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,616 psi | 44% | 1749 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,359 psi | 81% | 2907 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 80% | 48,588 psi | 75% | 2917 fps | 99.3% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,476 psi | 84% | 2920 fps | 95.5% |
| IMR 8133 Enduron | <<locked>> | 82% | 34,606 psi | 53% | 2615 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 43,468 psi | 67% | 2720 fps | 100% |
| Norma 217 | <<locked>> | 80% | 32,866 psi | 51% | 2582 fps | 97.3% |
| Norma MRP | <<locked>> | 80% | 54,085 psi | 83% | 3005 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 49,559 psi | 76% | 2940 fps | 99.6% |
| Ramshot Magnum | <<locked>> | 80% | 44,672 psi | 69% | 2802 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,530 psi | 45% | 1795 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 42,511 psi | 65% | 2848 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 38,957 psi | 60% | 2730 fps | 96% |
| Rottweil R 904 | <<locked>> | 80% | 54,737 psi | 84% | 2953 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 80% | 54,012 psi | 83% | 2966 fps | 100% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 45,020 psi | 69% | 2812 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 53,664 psi | 83% | 2959 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 54,302 psi | 84% | 2933 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 47,703 psi | 73% | 2808 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 84% | 47,108 psi | 72% | 2825 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 80% | 54,215 psi | 83% | 2933 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 53,403 psi | 82% | 3009 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 80% | 44,933 psi | 69% | 2822 fps | 98.5% |
| Vihtavuori N568 | <<locked>> | 80% | 39,987 psi | 62% | 2749 fps | 95.8% |
| Vihtavuori N570 | 75.2 gr | 84% | 44,135 psi | 68% | 2877 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 49,734 psi | 77% | 2933 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,386 psi | 78% | 2871 fps | 99.9% |
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 49 powders for .26 Nosler loaded with the .263 | 139gr | Prvi Partizan FMJ BT. ADI AR 2218 delivers the highest muzzle velocity at 3,182 fps; across all powders the maximum-charge window runs from 1,955 fps to 3,182 fps. Accurate 8700 gives the best case fill at 100 %, and 49 of the 49 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 0.263" calls for a 1:10.0 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, Vihtavuori N570, Alliant Reloder-50 rank at the top here: for .26 Nosler with the .263 | 139gr | Prvi Partizan FMJ 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.