Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 139gr | Lapua Scenar bullet and 52 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.
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Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 98% | 45,527 psi | 88% | 2579 fps | 98.4% |
| Accurate 4350 | <<locked>> | 88% | 44,802 psi | 87% | 2582 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 82% | 46,035 psi | 89% | 2530 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 94% | 46,180 psi | 90% | 2612 fps | 95.9% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 46,282 psi | 90% | 2615 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 46,296 psi | 90% | 2552 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 46,108 psi | 90% | 2638 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 86% | 46,441 psi | 90% | 2661 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 45,687 psi | 89% | 2605 fps | 95.9% |
| Alliant Reloder-22 | <<locked>> | 98% | 45,527 psi | 88% | 2651 fps | 96.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,818 psi | 89% | 2651 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 40,263 psi | 78% | 2572 fps | 97.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 45,063 psi | 88% | 2713 fps | 99.5% |
| Bofors RP3 | <<locked>> | 82% | 46,398 psi | 90% | 2562 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 45,527 psi | 88% | 2651 fps | 96.1% |
| Bofors RP7 | <<locked>> | 86% | 46,499 psi | 90% | 2539 fps | 97.1% |
| Hodgdon H414 | <<locked>> | 86% | 44,106 psi | 86% | 2572 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 84% | 44,411 psi | 86% | 2536 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 45,890 psi | 89% | 2575 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 46,499 psi | 90% | 2651 fps | 97.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,114 psi | 70% | 1640 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 44,367 psi | 86% | 2523 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 45,411 psi | 88% | 2520 fps | 97.3% |
| IMR 4831 | <<locked>> | 90% | 45,527 psi | 88% | 2579 fps | 99.5% |
| Lovex S065 | <<locked>> | 86% | 45,194 psi | 88% | 2520 fps | 98.5% |
| Lovex S070 | <<locked>> | 88% | 45,803 psi | 89% | 2552 fps | 97.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,509 psi | 79% | 2490 fps | 97.3% |
| Norma MRP | <<locked>> | 96% | 44,817 psi | 87% | 2671 fps | 97.4% |
| Norma URP | <<locked>> | 88% | 44,179 psi | 86% | 2569 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 90% | 46,079 psi | 89% | 2618 fps | 98.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,724 psi | 71% | 1680 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 46,050 psi | 89% | 2657 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 44,367 psi | 86% | 2598 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 46,456 psi | 90% | 2671 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 82% | 43,685 psi | 85% | 2510 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 86% | 46,499 psi | 90% | 2539 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 86% | 45,194 psi | 88% | 2520 fps | 98.5% |
| Shooters World SW4350 | <<locked>> | 88% | 45,803 psi | 89% | 2552 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 44,643 psi | 87% | 2559 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 45,339 psi | 88% | 2425 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 44,440 psi | 86% | 2467 fps | 97.2% |
| Somchem S355 | <<locked>> | 82% | 44,193 psi | 86% | 2513 fps | 99.9% |
| Somchem S365 | <<locked>> | 92% | 45,818 psi | 89% | 2631 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 45,107 psi | 88% | 2569 fps | 96.8% |
| Vihtavuori N150 | <<locked>> | 84% | 44,918 psi | 87% | 2493 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 46,180 psi | 90% | 2569 fps | 99.4% |
| Vihtavuori N165 | <<locked>> | 98% | 44,338 psi | 86% | 2546 fps | 96.2% |
| Vihtavuori N550 | <<locked>> | 88% | 45,484 psi | 88% | 2575 fps | 99.2% |
| Vihtavuori N555 | <<locked>> | 96% | 45,005 psi | 87% | 2628 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 45,556 psi | 88% | 2546 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 44,106 psi | 86% | 2572 fps | 97.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,118 psi | 80% | 2690 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% | 34,737 psi | 67% | 2372 fps | 95.5% |
| Accurate 4350 | <<locked>> | 80% | 34,084 psi | 66% | 2369 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 80% | 43,250 psi | 84% | 2480 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 92% | 43,323 psi | 84% | 2559 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 43,236 psi | 84% | 2556 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 43,511 psi | 85% | 2503 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 33,692 psi | 65% | 2379 fps | 97.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,840 psi | 73% | 2497 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 92% | 42,714 psi | 83% | 2549 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 96% | 42,801 psi | 83% | 2598 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,223 psi | 51% | 2198 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 94% | 33,359 psi | 65% | 2405 fps | 95.2% |
| Alliant Reloder-26 | 42.8 gr | 86% | 31,662 psi | 61% | 2408 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 43,540 psi | 85% | 2513 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 42,801 psi | 83% | 2598 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 38,653 psi | 75% | 2388 fps | 95% |
| Hodgdon H414 | <<locked>> | 82% | 38,638 psi | 75% | 2467 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 82% | 41,771 psi | 81% | 2487 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,256 psi | 61% | 2283 fps | 97.9% |
| Hodgdon Superformance | <<locked>> | 84% | 40,509 psi | 79% | 2533 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,021 psi | 52% | 1467 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 38,986 psi | 76% | 2418 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,943 psi | 78% | 2415 fps | 95.9% |
| IMR 4831 | <<locked>> | 80% | 32,851 psi | 64% | 2326 fps | 96.7% |
| Lovex S065 | <<locked>> | 80% | 37,652 psi | 73% | 2375 fps | 96.8% |
| Lovex S070 | <<locked>> | 82% | 38,116 psi | 74% | 2402 fps | 95.7% |
| Lovex S071 | <<locked>> | 94% | 33,518 psi | 65% | 2346 fps | 95% |
| Norma MRP | 44.5 gr | 92% | 39,247 psi | 76% | 2556 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 34,185 psi | 66% | 2365 fps | 97% |
| Ramshot Hunter | <<locked>> | 82% | 35,273 psi | 69% | 2402 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,354 psi | 53% | 1499 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 40,248 psi | 78% | 2552 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,562 psi | 65% | 2379 fps | 96.6% |
| ReloadSwiss RS 70 | 39.5 gr | 80% | 33,185 psi | 64% | 2385 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 80% | 41,002 psi | 80% | 2464 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 80% | 38,653 psi | 75% | 2388 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,652 psi | 73% | 2375 fps | 96.8% |
| Shooters World SW4350 | <<locked>> | 82% | 38,116 psi | 74% | 2402 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,959 psi | 81% | 2510 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,801 psi | 83% | 2385 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 36,608 psi | 71% | 2316 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 41,510 psi | 81% | 2464 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 30,734 psi | 60% | 2326 fps | 98.9% |
| Somchem S385 | <<locked>> | 90% | 39,798 psi | 77% | 2470 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 39,595 psi | 77% | 2398 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 35,563 psi | 69% | 2369 fps | 97.4% |
| Vihtavuori N165 | <<locked>> | 96% | 41,626 psi | 81% | 2497 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 35,027 psi | 68% | 2369 fps | 97% |
| Vihtavuori N555 | <<locked>> | 82% | 28,471 psi | 55% | 2270 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,824 psi | 68% | 2343 fps | 99% |
| Winchester 760 | <<locked>> | 82% | 38,638 psi | 75% | 2467 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,078 psi | 51% | 2270 fps | 95.9% |
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 52 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 139gr | Lapua Scenar. Alliant Reloder-26 delivers the highest muzzle velocity at 2,713 fps; across all powders the maximum-charge window runs from 1,640 fps to 2,713 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 52 of the 52 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 139.0 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 | 139gr | Lapua Scenar 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.