Load Specifications
Load data in caliber 6.5 x 58 R with .264 | 100gr | Nosler Partition bullet and 17 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 3031, Vihtavuori N135 and Accurate 4064.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 35,694 psi | 88% | 2510 fps | 98.8% |
| Accurate 2460 | <<locked>> | 82% | 36,085 psi | 89% | 2536 fps | 96.2% |
| Accurate 2495 | <<locked>> | 92% | 35,868 psi | 88% | 2585 fps | 99.1% |
| Accurate 4064 | <<locked>> | 94% | 35,708 psi | 88% | 2595 fps | 97% |
| Alliant AR-Comp | <<locked>> | 86% | 34,795 psi | 86% | 2579 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,083 psi | 81% | 1706 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 35,360 psi | 87% | 2602 fps | 98.2% |
| Norma 202 | <<locked>> | 88% | 36,361 psi | 90% | 2566 fps | 96.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,025 psi | 81% | 1745 fps | 100% |
| Rottweil R 901 | <<locked>> | 84% | 35,578 psi | 88% | 2510 fps | 96% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 36,477 psi | 90% | 2480 fps | 96.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 35,433 psi | 87% | 2477 fps | 97.3% |
| Somchem S335 | <<locked>> | 86% | 35,853 psi | 88% | 2487 fps | 97.3% |
| Vihtavuori N133 | <<locked>> | 86% | 36,143 psi | 89% | 2493 fps | 98.8% |
| Vihtavuori N135 | <<locked>> | 90% | 34,679 psi | 85% | 2546 fps | 98.8% |
| Vihtavuori N140 | <<locked>> | 90% | 36,593 psi | 90% | 2549 fps | 97% |
| Vihtavuori N540 | <<locked>> | 90% | 34,998 psi | 86% | 2526 fps | 95.9% |
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 2015 | <<locked>> | 80% | 31,633 psi | 78% | 2418 fps | 97.8% |
| Accurate 2460 | <<locked>> | 80% | 33,663 psi | 83% | 2480 fps | 95.4% |
| Accurate 2495 | <<locked>> | 80% | 23,931 psi | 59% | 2274 fps | 95% |
| Accurate 4064 | 28.9 gr | 90% | 31,328 psi | 77% | 2493 fps | 95.5% |
| Alliant AR-Comp | <<locked>> | 80% | 28,689 psi | 71% | 2425 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,497 psi | 60% | 1526 fps | 100% |
| IMR 3031 | 25.4 gr | 80% | 27,543 psi | 68% | 2392 fps | 95.1% |
| Norma 202 | <<locked>> | 84% | 31,995 psi | 79% | 2464 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,221 psi | 60% | 1555 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 33,576 psi | 83% | 2461 fps | 95.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 32,358 psi | 80% | 2385 fps | 95% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 29,428 psi | 72% | 2333 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 29,617 psi | 73% | 2336 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 30,197 psi | 74% | 2356 fps | 97.2% |
| Vihtavuori N135 | 24.9 gr | 80% | 25,309 psi | 62% | 2297 fps | 95.4% |
| Vihtavuori N140 | <<locked>> | 86% | 32,256 psi | 79% | 2451 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 88% | 33,069 psi | 81% | 2480 fps | 95.2% |
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 17 powders for 6.5 x 58 R loaded with the .264 | 100gr | Nosler Partition. IMR 3031 delivers the highest muzzle velocity at 2,602 fps; across all powders the maximum-charge window runs from 1,706 fps to 2,602 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 17 of the 17 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 81–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.264" calls for a 1:12.5 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. IMR 3031, Vihtavuori N135, Accurate 4064 rank at the top here: for 6.5 x 58 R with the .264 | 100gr | Nosler Partition 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.