Load Specifications
Load data in caliber 6.5 x 58 R with .264 | 120gr | Sako Powerhead Blade bullet and 25 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 3031, Accurate 4064 and Vihtavuori N135.
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% | 34,838 psi | 86% | 2234 fps | 99.3% |
| Accurate 2460 | <<locked>> | 82% | 34,911 psi | 86% | 2257 fps | 97.1% |
| Accurate 2495 | <<locked>> | 92% | 34,156 psi | 84% | 2293 fps | 99.5% |
| Accurate 2520 | <<locked>> | 86% | 34,940 psi | 86% | 2297 fps | 96.7% |
| Accurate 4064 | <<locked>> | 96% | 36,593 psi | 90% | 2359 fps | 98.3% |
| Alliant AR-Comp | <<locked>> | 88% | 36,260 psi | 89% | 2339 fps | 100% |
| Hodgdon Benchmark | <<locked>> | 84% | 36,579 psi | 90% | 2241 fps | 95.7% |
| Hodgdon H322 | <<locked>> | 82% | 36,289 psi | 89% | 2300 fps | 98.5% |
| Hodgdon H335 | <<locked>> | 82% | 36,564 psi | 90% | 2310 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,822 psi | 81% | 1493 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 34,650 psi | 85% | 2323 fps | 98.9% |
| Lovex D073.6 | <<locked>> | 90% | 35,781 psi | 88% | 2326 fps | 96.9% |
| Norma 202 | <<locked>> | 88% | 35,114 psi | 86% | 2283 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,851 psi | 81% | 1529 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 36,143 psi | 89% | 2274 fps | 96.5% |
| Rottweil R 901 | <<locked>> | 84% | 34,389 psi | 85% | 2231 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 90% | 35,781 psi | 88% | 2326 fps | 96.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 35,969 psi | 89% | 2215 fps | 97.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 34,751 psi | 86% | 2211 fps | 98.2% |
| Somchem S335 | <<locked>> | 86% | 34,577 psi | 85% | 2208 fps | 98% |
| Vihtavuori N130 | <<locked>> | 82% | 36,114 psi | 89% | 2218 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 86% | 35,723 psi | 88% | 2224 fps | 99.4% |
| Vihtavuori N135 | <<locked>> | 92% | 36,085 psi | 89% | 2313 fps | 99.7% |
| Vihtavuori N140 | <<locked>> | 90% | 35,404 psi | 87% | 2270 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 92% | 36,579 psi | 90% | 2306 fps | 97.6% |
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% | 30,574 psi | 75% | 2146 fps | 98.5% |
| Accurate 2460 | <<locked>> | 80% | 32,547 psi | 80% | 2208 fps | 96.3% |
| Accurate 2495 | <<locked>> | 80% | 22,771 psi | 56% | 2021 fps | 96% |
| Accurate 2520 | <<locked>> | 82% | 30,313 psi | 75% | 2198 fps | 95% |
| Accurate 4064 | 24.5 gr | 88% | 28,210 psi | 69% | 2175 fps | 95.6% |
| Alliant AR-Comp | <<locked>> | 80% | 27,920 psi | 69% | 2159 fps | 99.6% |
| Hodgdon Benchmark | <<locked>> | 82% | 34,635 psi | 85% | 2198 fps | 95% |
| Hodgdon H322 | <<locked>> | 80% | 33,852 psi | 83% | 2247 fps | 97.9% |
| Hodgdon H335 | <<locked>> | 80% | 34,127 psi | 84% | 2260 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,236 psi | 60% | 1335 fps | 100% |
| IMR 3031 | 22 gr | 80% | 26,760 psi | 66% | 2133 fps | 96.3% |
| Lovex D073.6 | <<locked>> | 86% | 31,053 psi | 76% | 2224 fps | 95.3% |
| Norma 202 | <<locked>> | 82% | 29,153 psi | 72% | 2149 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,975 psi | 59% | 1362 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 33,750 psi | 83% | 2224 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 30,385 psi | 75% | 2139 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 86% | 31,053 psi | 76% | 2224 fps | 95.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 29,457 psi | 73% | 2077 fps | 95.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 26,992 psi | 66% | 2037 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 28,877 psi | 71% | 2083 fps | 96.1% |
| Vihtavuori N130 | <<locked>> | 80% | 33,721 psi | 83% | 2172 fps | 99.6% |
| Vihtavuori N133 | <<locked>> | 80% | 29,283 psi | 72% | 2090 fps | 98% |
| Vihtavuori N135 | 21.5 gr | 80% | 24,279 psi | 60% | 2041 fps | 96.4% |
| Vihtavuori N140 | <<locked>> | 84% | 29,530 psi | 73% | 2142 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 86% | 29,936 psi | 74% | 2165 fps | 95.3% |
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 25 powders for 6.5 x 58 R loaded with the .264 | 120gr | Sako Powerhead Blade. Accurate 4064 delivers the highest muzzle velocity at 2,359 fps; across all powders the maximum-charge window runs from 1,493 fps to 2,359 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 25 of the 25 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 120.0 gr projectile in 0.264" calls for a 1:8.5 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, Accurate 4064, Vihtavuori N135 rank at the top here: for 6.5 x 58 R with the .264 | 120gr | Sako Powerhead Blade 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.