Load Specifications
Load data in caliber 6.5 x 58 R with .264 | 120gr | Ferrobull Entox Sport bullet and 23 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate 4064, Vihtavuori N540 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.
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Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 82% | 35,694 psi | 88% | 2283 fps | 99.7% |
| Accurate 2495 | <<locked>> | 90% | 35,708 psi | 88% | 2349 fps | 99.9% |
| Accurate 2520 | <<locked>> | 84% | 36,114 psi | 89% | 2356 fps | 97.6% |
| Accurate 4064 | <<locked>> | 92% | 36,201 psi | 89% | 2379 fps | 98.7% |
| Alliant AR-Comp | <<locked>> | 84% | 34,896 psi | 86% | 2346 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 36,724 psi | 90% | 2382 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,214 psi | 82% | 1532 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 35,650 psi | 88% | 2379 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 86% | 34,563 psi | 85% | 2333 fps | 97.2% |
| Norma 201 | <<locked>> | 86% | 36,172 psi | 89% | 2316 fps | 95.8% |
| Norma 202 | <<locked>> | 86% | 36,361 psi | 90% | 2343 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,228 psi | 82% | 1572 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 35,259 psi | 87% | 2283 fps | 97.7% |
| Shooters World Match Rifle | <<locked>> | 86% | 34,563 psi | 85% | 2333 fps | 97.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 36,477 psi | 90% | 2260 fps | 98.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 35,331 psi | 87% | 2257 fps | 98.8% |
| Somchem S335 | <<locked>> | 84% | 35,404 psi | 87% | 2260 fps | 98.6% |
| Vihtavuori N133 | <<locked>> | 84% | 36,332 psi | 89% | 2270 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 88% | 35,085 psi | 86% | 2323 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 88% | 36,419 psi | 90% | 2323 fps | 98.6% |
| Vihtavuori N150 | <<locked>> | 94% | 35,418 psi | 87% | 2320 fps | 96.1% |
| Vihtavuori N540 | <<locked>> | 88% | 34,998 psi | 86% | 2310 fps | 97.8% |
| Winchester 748 | <<locked>> | 84% | 35,447 psi | 87% | 2356 fps | 96.5% |
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% | 33,446 psi | 82% | 2238 fps | 99.4% |
| Accurate 2495 | <<locked>> | 80% | 25,382 psi | 63% | 2116 fps | 97.8% |
| Accurate 2520 | <<locked>> | 80% | 31,328 psi | 77% | 2251 fps | 96.1% |
| Accurate 4064 | 24.8 gr | 82% | 25,788 psi | 64% | 2139 fps | 95.1% |
| Alliant AR-Comp | <<locked>> | 80% | 30,545 psi | 75% | 2254 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 34,461 psi | 85% | 2336 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,410 psi | 60% | 1365 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 29,225 psi | 72% | 2231 fps | 98% |
| Lovex D073.6 | <<locked>> | 82% | 29,936 psi | 74% | 2231 fps | 95.5% |
| Norma 201 | <<locked>> | 84% | 33,968 psi | 84% | 2270 fps | 95% |
| Norma 202 | <<locked>> | 80% | 29,979 psi | 74% | 2201 fps | 96.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,555 psi | 60% | 1401 fps | 100% |
| Rottweil R 901 | <<locked>> | 80% | 33,127 psi | 82% | 2234 fps | 97.1% |
| Shooters World Match Rifle | <<locked>> | 82% | 29,936 psi | 74% | 2231 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 31,995 psi | 79% | 2169 fps | 96.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 25,846 psi | 64% | 2041 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 31,241 psi | 77% | 2172 fps | 97.6% |
| Vihtavuori N133 | <<locked>> | 80% | 31,908 psi | 79% | 2182 fps | 99.1% |
| Vihtavuori N135 | 23.4 gr | 80% | 26,774 psi | 66% | 2136 fps | 98.1% |
| Vihtavuori N140 | <<locked>> | 80% | 28,195 psi | 69% | 2142 fps | 96% |
| Vihtavuori N150 | <<locked>> | 92% | 33,214 psi | 82% | 2270 fps | 95.3% |
| Vihtavuori N540 | 25.9 gr | 82% | 28,718 psi | 71% | 2169 fps | 95.5% |
| Winchester 748 | <<locked>> | 82% | 33,286 psi | 82% | 2306 fps | 95.7% |
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 23 powders for 6.5 x 58 R loaded with the .264 | 120gr | Ferrobull Entox Sport. Hodgdon BL-C2 delivers the highest muzzle velocity at 2,382 fps; across all powders the maximum-charge window runs from 1,532 fps to 2,382 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 23 of the 23 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 82–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.264" calls for a 1:9.5 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. Accurate 4064, Vihtavuori N540, Vihtavuori N135 rank at the top here: for 6.5 x 58 R with the .264 | 120gr | Ferrobull Entox Sport 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.