Load Specifications
Load data in caliber .26 Nosler with .263 | 140gr | Prvi Partizan PSP bullet and 26 powders. The key underlying parameters are shown in the table above.
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 8700 | <<locked>> | 96% | 56,376 psi | 87% | 3015 fps | 98.4% |
| ADI AR 2217 | <<locked>> | 88% | 58,218 psi | 90% | 3038 fps | 100% |
| ADI AR 2218 | <<locked>> | 90% | 55,419 psi | 85% | 3114 fps | 99% |
| ADI AR 2225 | <<locked>> | 88% | 55,782 psi | 86% | 3025 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 82% | 55,622 psi | 86% | 2979 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 88% | 58,566 psi | 90% | 3104 fps | 99.1% |
| Alliant Reloder-50 | <<locked>> | 90% | 57,232 psi | 88% | 3071 fps | 98.6% |
| Baschieri & Pellagri 109 | <<locked>> | 82% | 56,695 psi | 87% | 2986 fps | 99% |
| Bofors RP30 | <<locked>> | 84% | 56,318 psi | 87% | 3015 fps | 100% |
| Hodgdon H1000 | <<locked>> | 84% | 55,811 psi | 86% | 2995 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 82% | 55,550 psi | 85% | 3077 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,754 psi | 60% | 1955 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 86% | 57,957 psi | 89% | 2949 fps | 96.5% |
| IMR 8133 Enduron | <<locked>> | 90% | 55,927 psi | 86% | 3025 fps | 100% |
| Lovex S071 | <<locked>> | 82% | 56,217 psi | 86% | 2890 fps | 100% |
| Norma 217 | <<locked>> | 90% | 57,754 psi | 89% | 3051 fps | 100% |
| Ramshot Magnum | <<locked>> | 82% | 57,928 psi | 89% | 2992 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 40,016 psi | 62% | 2001 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 82% | 56,347 psi | 87% | 3061 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 56,115 psi | 86% | 3041 fps | 99.8% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 58,392 psi | 90% | 3025 fps | 98.4% |
| Vihtavuori 20N29 | <<locked>> | 98% | 56,289 psi | 87% | 3012 fps | 96.7% |
| Vihtavuori N170 | <<locked>> | 84% | 55,999 psi | 86% | 2953 fps | 97.6% |
| Vihtavuori N565 | <<locked>> | 82% | 58,030 psi | 89% | 3028 fps | 100% |
| Vihtavuori N568 | <<locked>> | 84% | 56,014 psi | 86% | 3038 fps | 99.6% |
| Vihtavuori N570 | <<locked>> | 86% | 57,493 psi | 88% | 3107 fps | 98.7% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 8700 | <<locked>> | 88% | 43,961 psi | 68% | 2782 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 80% | 45,600 psi | 70% | 2818 fps | 99.4% |
| ADI AR 2218 | <<locked>> | 82% | 43,076 psi | 66% | 2851 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 80% | 43,598 psi | 67% | 2808 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 52,446 psi | 81% | 2927 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 80% | 45,469 psi | 70% | 2858 fps | 96.5% |
| Alliant Reloder-50 | <<locked>> | 82% | 44,817 psi | 69% | 2831 fps | 95.8% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 53,461 psi | 82% | 2927 fps | 98.5% |
| Bofors RP30 | <<locked>> | 80% | 50,198 psi | 77% | 2910 fps | 99.8% |
| Hodgdon H1000 | <<locked>> | 80% | 49,153 psi | 76% | 2881 fps | 99.9% |
| Hodgdon Retumbo | <<locked>> | 80% | 52,054 psi | 80% | 3018 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 29,341 psi | 45% | 1749 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 82% | 51,648 psi | 79% | 2838 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 80% | 42,018 psi | 65% | 2759 fps | 98.7% |
| Lovex S071 | <<locked>> | 80% | 53,258 psi | 82% | 2844 fps | 100% |
| Norma 217 | <<locked>> | 80% | 43,178 psi | 66% | 2789 fps | 99.9% |
| Ramshot Magnum | <<locked>> | 80% | 54,404 psi | 84% | 2936 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 30,371 psi | 47% | 1795 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 52,620 psi | 81% | 3002 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 49,487 psi | 76% | 2923 fps | 99.1% |
| SNPE Vectan SP 13 | <<locked>> | 86% | 43,700 psi | 67% | 2749 fps | 95% |
| Vihtavuori 20N29 | <<locked>> | 94% | 49,850 psi | 77% | 2894 fps | 95% |
| Vihtavuori N170 | <<locked>> | 80% | 50,009 psi | 77% | 2844 fps | 96.3% |
| Vihtavuori N565 | <<locked>> | 80% | 54,679 psi | 84% | 2969 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 80% | 49,574 psi | 76% | 2920 fps | 98.7% |
| Vihtavuori N570 | <<locked>> | 80% | 47,979 psi | 74% | 2927 fps | 96.8% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 32 powders for .26 Nosler loaded with the .263 | 140gr | Prvi Partizan PSP. ADI AR 2218 delivers the highest muzzle velocity at 3,114 fps; across all powders the maximum-charge window runs from 1,955 fps to 3,114 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 32 of the 32 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.263" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. 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. As outliers, Hodgdon 50BMG, Hodgdon US 869, Vihtavuori 24N41 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.