Load Specifications
Load data in caliber 6.5 x 58 R with .264 | 123gr | MRR Green Hunting 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 N135 and Vihtavuori N540.
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% | 35,969 psi | 89% | 2231 fps | 99.7% |
| Accurate 2495 | <<locked>> | 90% | 36,695 psi | 90% | 2313 fps | 99.9% |
| Accurate 2520 | <<locked>> | 84% | 36,405 psi | 90% | 2303 fps | 97.6% |
| Accurate 4064 | <<locked>> | 92% | 36,434 psi | 90% | 2326 fps | 98.7% |
| Alliant AR-Comp | <<locked>> | 84% | 35,520 psi | 87% | 2303 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 34,722 psi | 86% | 2287 fps | 95.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,620 psi | 83% | 1499 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 35,911 psi | 88% | 2329 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 86% | 34,853 psi | 86% | 2283 fps | 97.2% |
| Norma 201 | <<locked>> | 86% | 36,695 psi | 90% | 2270 fps | 95.9% |
| Norma 202 | <<locked>> | 86% | 36,361 psi | 90% | 2287 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,750 psi | 83% | 1535 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 36,100 psi | 89% | 2241 fps | 97.9% |
| Shooters World Match Rifle | <<locked>> | 86% | 34,853 psi | 86% | 2283 fps | 97.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 36,622 psi | 90% | 2208 fps | 98.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 35,679 psi | 88% | 2211 fps | 98.8% |
| Somchem S335 | <<locked>> | 84% | 35,795 psi | 88% | 2211 fps | 98.7% |
| Vihtavuori N133 | <<locked>> | 84% | 36,434 psi | 90% | 2218 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 88% | 35,041 psi | 86% | 2267 fps | 99.7% |
| Vihtavuori N140 | <<locked>> | 86% | 34,592 psi | 85% | 2234 fps | 98.1% |
| Vihtavuori N150 | <<locked>> | 94% | 35,433 psi | 87% | 2264 fps | 96% |
| Vihtavuori N540 | <<locked>> | 88% | 35,244 psi | 87% | 2264 fps | 97.7% |
| Winchester 748 | <<locked>> | 84% | 35,578 psi | 88% | 2303 fps | 96.4% |
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% | 34,055 psi | 84% | 2195 fps | 99.5% |
| Accurate 2495 | <<locked>> | 80% | 26,411 psi | 65% | 2090 fps | 98.1% |
| Accurate 2520 | <<locked>> | 80% | 31,879 psi | 79% | 2211 fps | 96.2% |
| Accurate 4064 | 23.8 gr | 82% | 26,789 psi | 66% | 2110 fps | 95.6% |
| Alliant AR-Comp | <<locked>> | 80% | 31,009 psi | 76% | 2208 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 32,532 psi | 80% | 2238 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,889 psi | 61% | 1335 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 29,747 psi | 73% | 2192 fps | 98.1% |
| Lovex D073.6 | <<locked>> | 82% | 30,487 psi | 75% | 2192 fps | 95.7% |
| Norma 201 | <<locked>> | 84% | 34,432 psi | 85% | 2224 fps | 95.1% |
| Norma 202 | <<locked>> | 80% | 30,226 psi | 74% | 2152 fps | 96.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,714 psi | 61% | 1365 fps | 100% |
| Rottweil R 901 | <<locked>> | 80% | 33,910 psi | 84% | 2195 fps | 97.3% |
| Shooters World Match Rifle | <<locked>> | 82% | 30,487 psi | 75% | 2192 fps | 95.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 32,474 psi | 80% | 2126 fps | 97% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 26,266 psi | 65% | 2001 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 31,894 psi | 79% | 2133 fps | 97.7% |
| Vihtavuori N133 | <<locked>> | 80% | 32,271 psi | 79% | 2136 fps | 99.1% |
| Vihtavuori N135 | 22.4 gr | 80% | 27,311 psi | 67% | 2096 fps | 98.2% |
| Vihtavuori N140 | <<locked>> | 80% | 28,485 psi | 70% | 2096 fps | 96% |
| Vihtavuori N150 | <<locked>> | 92% | 33,199 psi | 82% | 2218 fps | 95.2% |
| Vihtavuori N540 | 24.8 gr | 82% | 29,182 psi | 72% | 2126 fps | 95.7% |
| Winchester 748 | <<locked>> | 82% | 33,388 psi | 82% | 2254 fps | 95.6% |
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 | 123gr | MRR Green Hunting. IMR 3031 delivers the highest muzzle velocity at 2,329 fps; across all powders the maximum-charge window runs from 1,499 fps to 2,329 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 83–90 %, leaving at least 10 % headroom. The 123.0 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 N135, Vihtavuori N540 rank at the top here: for 6.5 x 58 R with the .264 | 123gr | MRR Green Hunting 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.