Load Specifications
Load data in caliber 6.5 x 58 R with .264 | 140gr | Winchester Powerpoint bullet and 24 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, Alliant Reloder-17 and Winchester 6.5 StaBALL.
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 2495 | <<locked>> | 82% | 36,651 psi | 90% | 2185 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 36,724 psi | 90% | 2211 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 36,114 psi | 89% | 2205 fps | 97.7% |
| Alliant Reloder-15 | <<locked>> | 82% | 36,303 psi | 89% | 2205 fps | 96.2% |
| Alliant Reloder-17 | <<locked>> | 88% | 35,389 psi | 87% | 2264 fps | 96.8% |
| Bofors RP3 | <<locked>> | 84% | 35,317 psi | 87% | 2201 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 34,809 psi | 86% | 2195 fps | 96.6% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 36,622 psi | 90% | 2247 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,606 psi | 85% | 1453 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 36,535 psi | 90% | 2169 fps | 96.3% |
| Lovex S062 | <<locked>> | 82% | 36,013 psi | 89% | 2172 fps | 98% |
| Norma 203B | <<locked>> | 82% | 35,665 psi | 88% | 2195 fps | 96.6% |
| Ramshot Big Game | <<locked>> | 82% | 35,273 psi | 87% | 2208 fps | 96.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,867 psi | 86% | 1486 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 35,360 psi | 87% | 2274 fps | 99% |
| Rottweil R 903 | <<locked>> | 86% | 35,186 psi | 87% | 2192 fps | 97.2% |
| Shooters World Precision | <<locked>> | 82% | 36,013 psi | 89% | 2172 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 34,461 psi | 85% | 2195 fps | 95.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 36,448 psi | 90% | 2123 fps | 99.9% |
| Somchem S355 | <<locked>> | 86% | 36,361 psi | 90% | 2201 fps | 97.3% |
| Somchem S365 | <<locked>> | 96% | 35,969 psi | 89% | 2283 fps | 98.5% |
| Vihtavuori N150 | <<locked>> | 86% | 34,606 psi | 85% | 2149 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 82% | 36,260 psi | 89% | 2175 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 35,520 psi | 87% | 2175 fps | 96.8% |
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 2495 | <<locked>> | 80% | 34,127 psi | 84% | 2139 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 32,314 psi | 80% | 2126 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,749 psi | 78% | 2113 fps | 96.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 34,272 psi | 84% | 2162 fps | 95.5% |
| Alliant Reloder-17 | 29.5 gr | 86% | 33,170 psi | 82% | 2211 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 30,980 psi | 76% | 2110 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 32,576 psi | 80% | 2149 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,563 psi | 85% | 2205 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,715 psi | 63% | 1296 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 34,142 psi | 84% | 2119 fps | 95.5% |
| Lovex S062 | <<locked>> | 80% | 33,968 psi | 84% | 2129 fps | 97.5% |
| Norma 203B | <<locked>> | 80% | 33,634 psi | 83% | 2152 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 80% | 32,996 psi | 81% | 2159 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,049 psi | 64% | 1329 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 29,298 psi | 72% | 2123 fps | 96.8% |
| Rottweil R 903 | <<locked>> | 80% | 29,066 psi | 72% | 2057 fps | 95% |
| Shooters World Precision | <<locked>> | 80% | 33,968 psi | 84% | 2129 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 32,271 psi | 79% | 2146 fps | 95.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,300 psi | 80% | 2044 fps | 99.5% |
| Somchem S355 | <<locked>> | 80% | 30,197 psi | 74% | 2067 fps | 95.1% |
| Somchem S365 | 28.7 gr | 88% | 28,094 psi | 69% | 2096 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 28,645 psi | 71% | 2018 fps | 96.1% |
| Vihtavuori N540 | <<locked>> | 80% | 34,243 psi | 84% | 2136 fps | 99.2% |
| Winchester 6.5 StaBALL | 30.3 gr | 86% | 31,299 psi | 77% | 2083 fps | 95.1% |
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 24 powders for 6.5 x 58 R loaded with the .264 | 140gr | Winchester Powerpoint. Somchem S365 delivers the highest muzzle velocity at 2,283 fps; across all powders the maximum-charge window runs from 1,453 fps to 2,283 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 24 of the 24 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 85–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.264" calls for a 1:14.0 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. Somchem S365, Alliant Reloder-17, Winchester 6.5 StaBALL rank at the top here: for 6.5 x 58 R with the .264 | 140gr | Winchester Powerpoint 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.