Load Specifications
Load data in caliber 6.5 x 58 R with .264 | 121gr | Lehigh Defense Match Solid bullet and 20 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 Accurate 2495.
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>> | 84% | 35,665 psi | 88% | 2224 fps | 99.4% |
| Accurate 2460 | <<locked>> | 82% | 35,940 psi | 89% | 2251 fps | 97.2% |
| Accurate 2495 | <<locked>> | 92% | 35,186 psi | 87% | 2283 fps | 99.6% |
| Accurate 2520 | <<locked>> | 86% | 35,534 psi | 88% | 2280 fps | 96.7% |
| Accurate 4064 | <<locked>> | 94% | 35,404 psi | 87% | 2306 fps | 97.9% |
| Alliant AR-Comp | <<locked>> | 86% | 34,490 psi | 85% | 2277 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,170 psi | 82% | 1480 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 35,389 psi | 87% | 2313 fps | 99% |
| Lovex D073.6 | <<locked>> | 90% | 36,448 psi | 90% | 2313 fps | 97% |
| Norma 202 | <<locked>> | 88% | 35,911 psi | 88% | 2270 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,286 psi | 82% | 1516 fps | 100% |
| Rottweil R 901 | <<locked>> | 84% | 35,462 psi | 87% | 2221 fps | 97.1% |
| Shooters World Match Rifle | <<locked>> | 90% | 36,448 psi | 90% | 2313 fps | 97% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 36,260 psi | 89% | 2192 fps | 97.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 35,114 psi | 86% | 2192 fps | 98.2% |
| Somchem S335 | <<locked>> | 86% | 35,375 psi | 87% | 2198 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 86% | 35,926 psi | 88% | 2201 fps | 99.3% |
| Vihtavuori N135 | <<locked>> | 92% | 36,492 psi | 90% | 2293 fps | 99.7% |
| Vihtavuori N140 | <<locked>> | 90% | 36,245 psi | 89% | 2260 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 92% | 36,709 psi | 90% | 2283 fps | 97.5% |
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% | 31,357 psi | 77% | 2136 fps | 98.6% |
| Accurate 2460 | <<locked>> | 80% | 33,518 psi | 83% | 2201 fps | 96.5% |
| Accurate 2495 | 21.8 gr | 80% | 23,902 psi | 59% | 2024 fps | 96.5% |
| Accurate 2520 | <<locked>> | 82% | 30,908 psi | 76% | 2182 fps | 95.1% |
| Accurate 4064 | 23.4 gr | 86% | 27,398 psi | 67% | 2126 fps | 95.1% |
| Alliant AR-Comp | <<locked>> | 80% | 28,543 psi | 70% | 2146 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,424 psi | 60% | 1319 fps | 100% |
| IMR 3031 | 21.5 gr | 80% | 27,412 psi | 68% | 2123 fps | 96.4% |
| Lovex D073.6 | <<locked>> | 86% | 32,024 psi | 79% | 2221 fps | 95.5% |
| Norma 202 | <<locked>> | 82% | 29,501 psi | 73% | 2133 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,221 psi | 60% | 1345 fps | 100% |
| Rottweil R 901 | <<locked>> | 80% | 31,314 psi | 77% | 2129 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 86% | 32,024 psi | 79% | 2221 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 30,066 psi | 74% | 2064 fps | 95.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 27,615 psi | 68% | 2028 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 29,631 psi | 73% | 2073 fps | 96.3% |
| Vihtavuori N133 | <<locked>> | 80% | 29,834 psi | 73% | 2077 fps | 98% |
| Vihtavuori N135 | <<locked>> | 80% | 24,990 psi | 62% | 2031 fps | 96.6% |
| Vihtavuori N140 | <<locked>> | 82% | 28,268 psi | 70% | 2083 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 86% | 30,429 psi | 75% | 2149 fps | 95.4% |
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 20 powders for 6.5 x 58 R loaded with the .264 | 121gr | Lehigh Defense Match Solid. IMR 3031 delivers the highest muzzle velocity at 2,313 fps; across all powders the maximum-charge window runs from 1,480 fps to 2,313 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 20 of the 20 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 121.0 gr projectile in 0.264" calls for a 1:8.0 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, Accurate 2495 rank at the top here: for 6.5 x 58 R with the .264 | 121gr | Lehigh Defense Match Solid 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.