Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 145gr | Barnes Match Burner BT bullet and 54 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, ReloadSwiss RS 70 and Norma MRP.
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 3100 | <<locked>> | 98% | 46,340 psi | 90% | 2536 fps | 98.8% |
| Accurate 4350 | <<locked>> | 88% | 45,658 psi | 89% | 2539 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 82% | 46,412 psi | 90% | 2477 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 44,019 psi | 85% | 2516 fps | 95.8% |
| Alliant Reloder-16 | <<locked>> | 88% | 43,918 psi | 85% | 2539 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 84% | 43,990 psi | 85% | 2559 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 46,253 psi | 90% | 2559 fps | 96.5% |
| Alliant Reloder-22 | <<locked>> | 98% | 46,354 psi | 90% | 2608 fps | 96.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,543 psi | 90% | 2605 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,930 psi | 79% | 2533 fps | 98.4% |
| Alliant Reloder-26 | <<locked>> | 96% | 46,021 psi | 89% | 2671 fps | 99.7% |
| Bofors RP15ᴾ | <<locked>> | 100% | 45,324 psi | 88% | 2589 fps | 96.3% |
| Bofors RP5 | <<locked>> | 98% | 46,354 psi | 90% | 2608 fps | 96.7% |
| Bofors RP7 | <<locked>> | 84% | 44,193 psi | 86% | 2441 fps | 97% |
| Hodgdon H414 | <<locked>> | 86% | 44,875 psi | 87% | 2533 fps | 97.8% |
| Hodgdon H4350 | <<locked>> | 84% | 45,324 psi | 88% | 2497 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 43,758 psi | 85% | 2480 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 44,005 psi | 85% | 2549 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,216 psi | 70% | 1601 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 44,686 psi | 87% | 2474 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 84% | 45,905 psi | 89% | 2474 fps | 97.8% |
| IMR 4831 | <<locked>> | 90% | 46,311 psi | 90% | 2533 fps | 99.7% |
| Lovex S065 | <<locked>> | 86% | 45,745 psi | 89% | 2474 fps | 98.8% |
| Lovex S070 | <<locked>> | 88% | 46,470 psi | 90% | 2507 fps | 98.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,133 psi | 80% | 2448 fps | 97.8% |
| Norma MRP | <<locked>> | 96% | 45,658 psi | 89% | 2628 fps | 97.9% |
| Norma URP | <<locked>> | 88% | 44,904 psi | 87% | 2526 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 88% | 43,830 psi | 85% | 2523 fps | 98.3% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 42,917 psi | 83% | 2526 fps | 96.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,883 psi | 72% | 1640 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 43,845 psi | 85% | 2559 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 45,266 psi | 88% | 2556 fps | 99.5% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 44,193 psi | 86% | 2572 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 82% | 44,237 psi | 86% | 2461 fps | 100% |
| Rottweil R 905 | <<locked>> | 94% | 45,339 psi | 88% | 2546 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 84% | 44,193 psi | 86% | 2441 fps | 97% |
| Shooters World Long Rifle | <<locked>> | 86% | 45,745 psi | 89% | 2474 fps | 98.8% |
| Shooters World SW4350 | <<locked>> | 88% | 46,470 psi | 90% | 2507 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 45,281 psi | 88% | 2510 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 45,948 psi | 89% | 2375 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 45,020 psi | 87% | 2421 fps | 97.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 44,918 psi | 87% | 2543 fps | 96.3% |
| Somchem S355 | <<locked>> | 82% | 44,628 psi | 87% | 2461 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 46,456 psi | 90% | 2579 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 45,730 psi | 89% | 2526 fps | 97.3% |
| Vihtavuori N150 | <<locked>> | 84% | 45,440 psi | 88% | 2441 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 43,729 psi | 85% | 2470 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 98% | 45,005 psi | 87% | 2503 fps | 96.7% |
| Vihtavuori N550 | <<locked>> | 88% | 45,977 psi | 89% | 2526 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 96% | 45,716 psi | 89% | 2579 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 46,151 psi | 90% | 2497 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 44,875 psi | 87% | 2533 fps | 97.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,989 psi | 82% | 2654 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 45,585 psi | 89% | 2516 fps | 96.2% |
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 3100 | <<locked>> | 88% | 33,199 psi | 64% | 2287 fps | 95.3% |
| Accurate 4350 | <<locked>> | 80% | 34,563 psi | 67% | 2326 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 80% | 43,874 psi | 85% | 2434 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 41,336 psi | 80% | 2464 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,229 psi | 66% | 2339 fps | 97.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,392 psi | 75% | 2451 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 92% | 43,482 psi | 84% | 2510 fps | 95.7% |
| Alliant Reloder-22 | <<locked>> | 96% | 43,482 psi | 84% | 2556 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 24,903 psi | 48% | 2110 fps | 95% |
| Alliant Reloder-25 | <<locked>> | 94% | 33,794 psi | 66% | 2369 fps | 96% |
| Alliant Reloder-26 | 41 gr | 84% | 30,139 psi | 59% | 2316 fps | 95.2% |
| Bofors RP15 | <<locked>> | 98% | 42,525 psi | 83% | 2536 fps | 95.4% |
| Bofors RP5 | <<locked>> | 96% | 43,482 psi | 84% | 2556 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 39,247 psi | 76% | 2346 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 36,738 psi | 71% | 2372 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 82% | 42,235 psi | 82% | 2441 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,604 psi | 61% | 2241 fps | 98.3% |
| Hodgdon Superformance | <<locked>> | 82% | 38,247 psi | 74% | 2434 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,948 psi | 52% | 1427 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 39,479 psi | 77% | 2375 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,524 psi | 79% | 2375 fps | 96.5% |
| IMR 4831 | <<locked>> | 80% | 33,489 psi | 65% | 2287 fps | 97.3% |
| Lovex S065 | <<locked>> | 80% | 37,956 psi | 74% | 2326 fps | 97.2% |
| Lovex S070 | <<locked>> | 80% | 36,216 psi | 70% | 2310 fps | 95.5% |
| Lovex S071 | <<locked>> | 94% | 34,171 psi | 66% | 2306 fps | 95.7% |
| Norma MRP | 42.6 gr | 90% | 37,173 psi | 72% | 2454 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 34,563 psi | 67% | 2323 fps | 97.5% |
| Ramshot Hunter | <<locked>> | 80% | 33,576 psi | 65% | 2310 fps | 95.2% |
| Ramshot Magnum | <<locked>> | 98% | 40,118 psi | 78% | 2474 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,601 psi | 54% | 1463 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,799 psi | 79% | 2503 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,345 psi | 67% | 2343 fps | 97.2% |
| ReloadSwiss RS 70 | 38.7 gr | 80% | 33,678 psi | 65% | 2346 fps | 96.4% |
| Rottweil R 903 | <<locked>> | 80% | 41,423 psi | 80% | 2415 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 92% | 42,424 psi | 82% | 2493 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 39,247 psi | 76% | 2346 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,956 psi | 74% | 2326 fps | 97.2% |
| Shooters World SW4350 | <<locked>> | 80% | 36,216 psi | 70% | 2310 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,467 psi | 82% | 2461 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,366 psi | 84% | 2339 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,217 psi | 72% | 2277 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 42,003 psi | 82% | 2490 fps | 95.5% |
| Somchem S355 | <<locked>> | 80% | 41,901 psi | 81% | 2411 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 31,125 psi | 60% | 2283 fps | 99.3% |
| Somchem S385 | <<locked>> | 88% | 37,811 psi | 73% | 2375 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 39,958 psi | 78% | 2352 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 35,969 psi | 70% | 2323 fps | 97.8% |
| Vihtavuori N165 | <<locked>> | 94% | 39,595 psi | 77% | 2402 fps | 95.2% |
| Vihtavuori N550 | <<locked>> | 80% | 35,462 psi | 69% | 2326 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 80% | 27,050 psi | 53% | 2182 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,302 psi | 69% | 2300 fps | 99.3% |
| Winchester 760 | <<locked>> | 80% | 36,738 psi | 71% | 2372 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 84% | 24,961 psi | 48% | 2185 fps | 95.6% |
| Winchester Supreme 780 | <<locked>> | 94% | 42,685 psi | 83% | 2464 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 54 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 145gr | Barnes Match Burner BT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,671 fps; across all powders the maximum-charge window runs from 1,601 fps to 2,671 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 54 of the 54 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (355 MPa), the top charges use 70–90 %, leaving at least 10 % headroom. The 145.0 gr projectile in 0.264" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Bofors RP15 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. Alliant Reloder-26, ReloadSwiss RS 70, Norma MRP rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 145gr | Barnes Match Burner BT 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.