Load Specifications
Load data in caliber 6.5 x 72 R with .263 | 123gr | Prvi Partizan SP bullet and 28 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Winchester StaBALL HD and Alliant Reloder-23.
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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 42,714 psi | 89% | 2687 fps | 96.9% |
| Accurate 4350 | <<locked>> | 86% | 41,814 psi | 87% | 2687 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 86% | 40,814 psi | 85% | 2700 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 82% | 40,466 psi | 85% | 2710 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 96% | 40,683 psi | 85% | 2717 fps | 99.4% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,437 psi | 84% | 2726 fps | 96.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 42,264 psi | 88% | 2815 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 43,294 psi | 90% | 2694 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,071 psi | 75% | 1778 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 42,685 psi | 89% | 2690 fps | 98.5% |
| Lovex S065 | <<locked>> | 84% | 42,583 psi | 89% | 2631 fps | 97.2% |
| Lovex S070 | <<locked>> | 86% | 43,091 psi | 90% | 2661 fps | 96.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,741 psi | 85% | 2644 fps | 96.4% |
| Norma URP | <<locked>> | 86% | 41,466 psi | 87% | 2680 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 88% | 43,163 psi | 90% | 2723 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,593 psi | 76% | 1821 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 43,047 psi | 90% | 2772 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 41,524 psi | 87% | 2703 fps | 97.9% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 40,741 psi | 85% | 2717 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 84% | 42,583 psi | 89% | 2631 fps | 97.2% |
| Shooters World SW4350 | <<locked>> | 86% | 43,091 psi | 90% | 2661 fps | 96.2% |
| Somchem S365 | <<locked>> | 90% | 42,859 psi | 90% | 2746 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 42,090 psi | 88% | 2605 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 86% | 43,192 psi | 90% | 2680 fps | 98.4% |
| Vihtavuori N550 | <<locked>> | 86% | 42,670 psi | 89% | 2684 fps | 98.1% |
| Vihtavuori N555 | <<locked>> | 94% | 42,438 psi | 89% | 2740 fps | 98.9% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 42,801 psi | 89% | 2657 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,423 psi | 87% | 2858 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 92% | 37,362 psi | 78% | 2572 fps | 95.2% |
| Accurate 4350 | <<locked>> | 80% | 34,113 psi | 71% | 2516 fps | 96% |
| Alliant Reloder-16 | <<locked>> | 80% | 33,692 psi | 70% | 2526 fps | 96% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,942 psi | 79% | 2654 fps | 98.9% |
| Alliant Reloder-23 | 43 gr | 86% | 29,675 psi | 62% | 2438 fps | 95.9% |
| Alliant Reloder-25 | <<locked>> | 98% | 38,029 psi | 79% | 2667 fps | 96% |
| Alliant Reloder-26 | 48.3 gr | 88% | 34,142 psi | 71% | 2615 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,111 psi | 65% | 2421 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,021 psi | 56% | 1591 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 32,924 psi | 69% | 2470 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 37,608 psi | 79% | 2526 fps | 95.7% |
| Lovex S070 | <<locked>> | 84% | 40,509 psi | 85% | 2605 fps | 95.4% |
| Lovex S071 | <<locked>> | 98% | 38,116 psi | 80% | 2592 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 34,040 psi | 71% | 2510 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 84% | 37,797 psi | 79% | 2608 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,296 psi | 57% | 1627 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,321 psi | 84% | 2717 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,649 psi | 70% | 2526 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 35,534 psi | 74% | 2589 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,608 psi | 79% | 2526 fps | 95.7% |
| Shooters World SW4350 | <<locked>> | 84% | 40,509 psi | 85% | 2605 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 30,574 psi | 64% | 2464 fps | 98% |
| Vihtavuori N150 | <<locked>> | 80% | 39,450 psi | 82% | 2556 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 80% | 35,578 psi | 74% | 2516 fps | 96.3% |
| Vihtavuori N550 | <<locked>> | 80% | 34,882 psi | 73% | 2513 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 84% | 30,414 psi | 64% | 2461 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,925 psi | 73% | 2490 fps | 98.3% |
| Winchester StaBALL HD | 46.4 gr | 88% | 27,949 psi | 58% | 2461 fps | 95.5% |
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 28 powders for 6.5 x 72 R loaded with the .263 | 123gr | Prvi Partizan SP. Winchester StaBALL HD delivers the highest muzzle velocity at 2,858 fps; across all powders the maximum-charge window runs from 1,778 fps to 2,858 fps. Alliant Reloder-25 gives the best case fill at 100 %, and 28 of the 28 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 75–90 %, leaving at least 10 % headroom. The 123.0 gr projectile in 0.263" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-25, Hodgdon TrailBoss, Lovex S071 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. Alliant Reloder-26, Winchester StaBALL HD, Alliant Reloder-23 rank at the top here: for 6.5 x 72 R with the .263 | 123gr | Prvi Partizan SP 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.