Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 140gr | Nosler RDF bullet and 53 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Alliant Reloder-26 and ReloadSwiss RS 70.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 98% | 45,426 psi | 88% | 2569 fps | 98.4% |
| Accurate 4350 | <<locked>> | 88% | 44,643 psi | 87% | 2569 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 82% | 45,803 psi | 89% | 2513 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 94% | 46,021 psi | 89% | 2598 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 46,180 psi | 90% | 2602 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 46,050 psi | 89% | 2536 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 46,267 psi | 90% | 2631 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 86% | 46,267 psi | 90% | 2648 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 45,585 psi | 89% | 2592 fps | 95.9% |
| Alliant Reloder-22 | <<locked>> | 98% | 45,484 psi | 88% | 2638 fps | 96.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,716 psi | 89% | 2641 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,205 psi | 78% | 2559 fps | 97.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 45,005 psi | 87% | 2700 fps | 99.5% |
| Bofors RP3 | <<locked>> | 82% | 46,528 psi | 90% | 2552 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 45,484 psi | 88% | 2638 fps | 96.1% |
| Bofors RP7 | <<locked>> | 84% | 43,859 psi | 85% | 2480 fps | 96.6% |
| Hodgdon H414 | <<locked>> | 86% | 43,961 psi | 85% | 2562 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 84% | 44,527 psi | 86% | 2530 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 46,093 psi | 90% | 2566 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 46,427 psi | 90% | 2638 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,114 psi | 70% | 1634 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 44,179 psi | 86% | 2510 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 45,223 psi | 88% | 2507 fps | 97.3% |
| IMR 4831 | <<locked>> | 90% | 45,672 psi | 89% | 2572 fps | 99.5% |
| Lovex S065 | <<locked>> | 86% | 45,034 psi | 87% | 2507 fps | 98.5% |
| Lovex S070 | <<locked>> | 88% | 45,963 psi | 89% | 2543 fps | 97.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,393 psi | 78% | 2477 fps | 97.3% |
| Norma MRP | <<locked>> | 96% | 44,744 psi | 87% | 2657 fps | 97.4% |
| Norma URP | <<locked>> | 88% | 44,338 psi | 86% | 2562 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 90% | 45,977 psi | 89% | 2605 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,724 psi | 71% | 1673 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 46,166 psi | 90% | 2648 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 44,570 psi | 87% | 2592 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 46,369 psi | 90% | 2657 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 82% | 43,497 psi | 84% | 2497 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 94% | 44,266 psi | 86% | 2572 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 84% | 43,859 psi | 85% | 2480 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 86% | 45,034 psi | 87% | 2507 fps | 98.5% |
| Shooters World SW4350 | <<locked>> | 88% | 45,963 psi | 89% | 2543 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 44,773 psi | 87% | 2549 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 45,368 psi | 88% | 2415 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 44,570 psi | 87% | 2457 fps | 97.3% |
| Somchem S355 | <<locked>> | 82% | 44,005 psi | 85% | 2497 fps | 99.9% |
| Somchem S365 | <<locked>> | 92% | 45,658 psi | 89% | 2615 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 45,020 psi | 87% | 2556 fps | 96.9% |
| Vihtavuori N150 | <<locked>> | 84% | 45,034 psi | 87% | 2484 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 46,050 psi | 89% | 2559 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 98% | 44,251 psi | 86% | 2533 fps | 96.2% |
| Vihtavuori N550 | <<locked>> | 88% | 45,339 psi | 88% | 2562 fps | 99.3% |
| Vihtavuori N555 | <<locked>> | 96% | 44,904 psi | 87% | 2615 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 45,484 psi | 88% | 2533 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 44,266 psi | 86% | 2566 fps | 97.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,089 psi | 80% | 2680 fps | 100% |
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>> | 90% | 34,621 psi | 67% | 2359 fps | 95.5% |
| Accurate 4350 | <<locked>> | 80% | 33,924 psi | 66% | 2352 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 80% | 43,337 psi | 84% | 2470 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 43,236 psi | 84% | 2546 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 43,381 psi | 84% | 2549 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,279 psi | 84% | 2490 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 33,750 psi | 66% | 2369 fps | 97.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,666 psi | 73% | 2484 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 92% | 42,859 psi | 83% | 2543 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 42,699 psi | 83% | 2585 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,063 psi | 51% | 2185 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 94% | 33,257 psi | 65% | 2392 fps | 95.2% |
| Alliant Reloder-26 | 42.6 gr | 86% | 31,792 psi | 62% | 2402 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 43,323 psi | 84% | 2500 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 42,699 psi | 83% | 2585 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 38,725 psi | 75% | 2379 fps | 95% |
| Hodgdon H414 | <<locked>> | 82% | 38,464 psi | 75% | 2451 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 82% | 41,858 psi | 81% | 2477 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,096 psi | 60% | 2267 fps | 97.9% |
| Hodgdon Superformance | <<locked>> | 84% | 40,408 psi | 78% | 2520 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,963 psi | 52% | 1457 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 39,073 psi | 76% | 2408 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,045 psi | 78% | 2408 fps | 96% |
| IMR 4831 | <<locked>> | 80% | 32,909 psi | 64% | 2316 fps | 96.8% |
| Lovex S065 | <<locked>> | 80% | 37,434 psi | 73% | 2359 fps | 96.7% |
| Lovex S070 | <<locked>> | 82% | 37,956 psi | 74% | 2388 fps | 95.7% |
| Lovex S071 | <<locked>> | 94% | 33,402 psi | 65% | 2333 fps | 95% |
| Norma MRP | 44.2 gr | 92% | 39,204 psi | 76% | 2543 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 34,026 psi | 66% | 2352 fps | 97% |
| Ramshot Hunter | <<locked>> | 82% | 35,375 psi | 69% | 2395 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,586 psi | 54% | 1496 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,059 psi | 78% | 2536 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,663 psi | 65% | 2372 fps | 96.6% |
| ReloadSwiss RS 70 | 39.2 gr | 80% | 33,040 psi | 64% | 2369 fps | 95.6% |
| Rottweil R 903 | <<locked>> | 80% | 40,785 psi | 79% | 2448 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 92% | 41,510 psi | 81% | 2520 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 38,725 psi | 75% | 2379 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,434 psi | 73% | 2359 fps | 96.7% |
| Shooters World SW4350 | <<locked>> | 82% | 37,956 psi | 74% | 2388 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,771 psi | 81% | 2497 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,583 psi | 83% | 2372 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 36,680 psi | 71% | 2306 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 41,321 psi | 80% | 2448 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 30,560 psi | 59% | 2313 fps | 98.9% |
| Somchem S385 | <<locked>> | 90% | 39,682 psi | 77% | 2457 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 39,378 psi | 76% | 2385 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 35,360 psi | 69% | 2352 fps | 97.3% |
| Vihtavuori N165 | <<locked>> | 96% | 41,539 psi | 81% | 2484 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 34,867 psi | 68% | 2356 fps | 97% |
| Vihtavuori N555 | <<locked>> | 82% | 28,340 psi | 55% | 2257 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,693 psi | 67% | 2329 fps | 99% |
| Winchester 760 | <<locked>> | 82% | 38,740 psi | 75% | 2457 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,179 psi | 51% | 2264 fps | 96% |
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 53 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 140gr | Nosler RDF. Alliant Reloder-26 delivers the highest muzzle velocity at 2,700 fps; across all powders the maximum-charge window runs from 1,634 fps to 2,700 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 53 of the 53 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 140.0 gr projectile in 0.264" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Hodgdon TrailBoss 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. Norma MRP, Alliant Reloder-26, ReloadSwiss RS 70 rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 140gr | Nosler RDF 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.