Load Specifications
Load data in caliber 6.5 x 58 R with .264 | 144gr | Lapua FMJ Boat Tail bullet and 30 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Somchem S365 and Vihtavuori N150.
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>> | 84% | 35,476 psi | 87% | 2103 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 35,404 psi | 87% | 2126 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 35,114 psi | 86% | 2116 fps | 97% |
| Bofors RP3 | <<locked>> | 88% | 36,332 psi | 89% | 2156 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 36,027 psi | 89% | 2146 fps | 96.4% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 36,042 psi | 89% | 2162 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,301 psi | 84% | 1388 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 36,477 psi | 90% | 2110 fps | 96.8% |
| IMR 3031 | <<locked>> | 82% | 36,564 psi | 90% | 2152 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 36,492 psi | 90% | 2149 fps | 96.5% |
| Lovex D073.6 | <<locked>> | 82% | 35,476 psi | 87% | 2119 fps | 98.9% |
| Lovex S062 | <<locked>> | 84% | 35,244 psi | 87% | 2087 fps | 97.4% |
| Norma 203B | <<locked>> | 84% | 34,998 psi | 86% | 2113 fps | 96% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,577 psi | 85% | 1421 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 34,635 psi | 85% | 2178 fps | 98.4% |
| Rottweil R 902 | <<locked>> | 82% | 34,969 psi | 86% | 2060 fps | 97.3% |
| Rottweil R 903 | <<locked>> | 90% | 36,695 psi | 90% | 2152 fps | 97.3% |
| Shooters World Match Rifle | <<locked>> | 82% | 35,476 psi | 87% | 2119 fps | 98.9% |
| Shooters World Precision | <<locked>> | 84% | 35,244 psi | 87% | 2087 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 35,853 psi | 88% | 2152 fps | 95.9% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 36,201 psi | 89% | 2113 fps | 96.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 35,795 psi | 88% | 2044 fps | 99.8% |
| Somchem S355 | <<locked>> | 88% | 35,520 psi | 87% | 2116 fps | 96.6% |
| Somchem S365 | <<locked>> | 98% | 34,519 psi | 85% | 2175 fps | 97.5% |
| Vihtavuori N135 | <<locked>> | 84% | 35,752 psi | 88% | 2096 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 34,664 psi | 85% | 2060 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 90% | 36,201 psi | 89% | 2110 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 84% | 35,505 psi | 87% | 2093 fps | 99.2% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 34,983 psi | 86% | 2087 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 82% | 35,085 psi | 86% | 2113 fps | 96.6% |
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 2495 | <<locked>> | 80% | 30,980 psi | 76% | 2018 fps | 99.9% |
| Accurate 4064 | <<locked>> | 80% | 29,356 psi | 72% | 2001 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 30,777 psi | 76% | 2028 fps | 95.5% |
| Bofors RP3 | <<locked>> | 82% | 30,095 psi | 74% | 2028 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 33,808 psi | 83% | 2100 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 31,792 psi | 78% | 2073 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,367 psi | 62% | 1234 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,171 psi | 84% | 2064 fps | 96.1% |
| IMR 3031 | <<locked>> | 80% | 34,127 psi | 84% | 2110 fps | 99.9% |
| IMR 4895 | <<locked>> | 82% | 34,185 psi | 84% | 2103 fps | 95.7% |
| Lovex D073.6 | <<locked>> | 80% | 33,156 psi | 82% | 2073 fps | 98.4% |
| Lovex S062 | <<locked>> | 80% | 31,285 psi | 77% | 2005 fps | 96.2% |
| Norma 203B | <<locked>> | 82% | 32,822 psi | 81% | 2067 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,730 psi | 63% | 1270 fps | 100% |
| ReloadSwiss RS 60 | 25.3 gr | 82% | 28,805 psi | 71% | 2034 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 33,141 psi | 82% | 2024 fps | 96.7% |
| Rottweil R 903 | <<locked>> | 86% | 32,097 psi | 79% | 2064 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,156 psi | 82% | 2073 fps | 98.4% |
| Shooters World Precision | <<locked>> | 80% | 31,285 psi | 77% | 2005 fps | 96.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 33,721 psi | 83% | 2106 fps | 95.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 33,953 psi | 84% | 2070 fps | 95.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,646 psi | 73% | 1926 fps | 98.8% |
| Somchem S355 | <<locked>> | 84% | 31,546 psi | 78% | 2034 fps | 95.2% |
| Somchem S365 | 26.9 gr | 92% | 28,906 psi | 71% | 2044 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 31,517 psi | 78% | 2018 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 32,793 psi | 81% | 2024 fps | 99% |
| Vihtavuori N150 | 23.8 gr | 82% | 27,804 psi | 68% | 1936 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 31,227 psi | 77% | 2011 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 32,924 psi | 81% | 2044 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 32,938 psi | 81% | 2067 fps | 95.8% |
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 30 powders for 6.5 x 58 R loaded with the .264 | 144gr | Lapua FMJ Boat Tail. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,178 fps; across all powders the maximum-charge window runs from 1,388 fps to 2,178 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 30 of the 30 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 84–90 %, leaving at least 10 % headroom. The 144.0 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. ReloadSwiss RS 60, Somchem S365, Vihtavuori N150 rank at the top here: for 6.5 x 58 R with the .264 | 144gr | Lapua FMJ Boat Tail 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.