Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 142gr | SUS-TAC HPT bullet and 52 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Alliant Reloder-16.
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% | 43,816 psi | 85% | 2513 fps | 98% |
| Accurate 4350 | <<locked>> | 90% | 46,369 psi | 90% | 2569 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 82% | 44,947 psi | 87% | 2470 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 45,165 psi | 88% | 2493 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 45,005 psi | 87% | 2579 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 86% | 45,078 psi | 88% | 2595 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,512 psi | 86% | 2592 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,986 psi | 76% | 2503 fps | 97.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 43,642 psi | 85% | 2644 fps | 99.2% |
| Bofors RP3 | <<locked>> | 82% | 44,991 psi | 87% | 2497 fps | 100% |
| Bofors RP7 | <<locked>> | 86% | 45,368 psi | 88% | 2477 fps | 96.8% |
| Hodgdon H380 | <<locked>> | 82% | 45,556 psi | 88% | 2507 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 88% | 45,600 psi | 89% | 2562 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 86% | 46,122 psi | 90% | 2526 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 44,773 psi | 87% | 2516 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 45,266 psi | 88% | 2589 fps | 97.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,926 psi | 70% | 1604 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 45,876 psi | 89% | 2510 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 84% | 44,237 psi | 86% | 2461 fps | 97% |
| IMR 4831 | <<locked>> | 90% | 44,092 psi | 86% | 2516 fps | 99.3% |
| Lovex S065 | <<locked>> | 86% | 44,034 psi | 86% | 2461 fps | 98.3% |
| Lovex S070 | <<locked>> | 88% | 44,759 psi | 87% | 2490 fps | 97.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 39,073 psi | 76% | 2428 fps | 96.9% |
| Norma MRP | <<locked>> | 98% | 46,311 psi | 90% | 2657 fps | 97.7% |
| Norma URP | <<locked>> | 90% | 45,977 psi | 89% | 2562 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 90% | 44,599 psi | 87% | 2552 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,550 psi | 71% | 1644 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 45,861 psi | 89% | 2493 fps | 98% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 44,860 psi | 87% | 2595 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 46,006 psi | 89% | 2589 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 45,150 psi | 88% | 2605 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 84% | 45,208 psi | 88% | 2497 fps | 100% |
| Rottweil R 905 | <<locked>> | 96% | 45,876 psi | 89% | 2572 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 86% | 45,368 psi | 88% | 2477 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 86% | 44,034 psi | 86% | 2461 fps | 98.3% |
| Shooters World SW4350 | <<locked>> | 88% | 44,759 psi | 87% | 2490 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 43,381 psi | 84% | 2497 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 44,469 psi | 86% | 2372 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 46,296 psi | 90% | 2457 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 45,440 psi | 88% | 2569 fps | 96% |
| Somchem S355 | <<locked>> | 84% | 45,643 psi | 89% | 2497 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 44,338 psi | 86% | 2569 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 43,700 psi | 85% | 2507 fps | 96.4% |
| Vihtavuori N150 | <<locked>> | 84% | 43,656 psi | 85% | 2431 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 44,759 psi | 87% | 2507 fps | 99.2% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 45,716 psi | 89% | 2530 fps | 96.5% |
| Vihtavuori N550 | <<locked>> | 88% | 44,179 psi | 86% | 2513 fps | 99% |
| Vihtavuori N555 | <<locked>> | 98% | 46,383 psi | 90% | 2612 fps | 99.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 44,266 psi | 86% | 2484 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 45,919 psi | 89% | 2566 fps | 97.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,900 psi | 77% | 2625 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 46,412 psi | 90% | 2546 fps | 95.9% |
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% | 33,518 psi | 65% | 2313 fps | 95% |
| Accurate 4350 | <<locked>> | 80% | 33,011 psi | 64% | 2310 fps | 96.7% |
| ADI AR 2208 | <<locked>> | 80% | 42,134 psi | 82% | 2421 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,322 psi | 82% | 2444 fps | 99.9% |
| Alliant Reloder-16 | 34.5 gr | 80% | 32,735 psi | 64% | 2316 fps | 96.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,724 psi | 71% | 2434 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 84% | 26,963 psi | 52% | 2192 fps | 95.8% |
| Alliant Reloder-25 | <<locked>> | 96% | 34,389 psi | 67% | 2395 fps | 95.6% |
| Alliant Reloder-26 | 41 gr | 86% | 30,748 psi | 60% | 2349 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 42,395 psi | 82% | 2454 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 40,147 psi | 78% | 2379 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 42,685 psi | 83% | 2454 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 82% | 37,463 psi | 73% | 2405 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 84% | 43,250 psi | 84% | 2474 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,284 psi | 59% | 2224 fps | 97.5% |
| Hodgdon Superformance | <<locked>> | 84% | 39,233 psi | 76% | 2467 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,050 psi | 53% | 1437 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 40,408 psi | 78% | 2408 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,001 psi | 76% | 2359 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 31,821 psi | 62% | 2267 fps | 96.4% |
| Lovex S065 | <<locked>> | 80% | 36,608 psi | 71% | 2313 fps | 96.4% |
| Lovex S070 | <<locked>> | 82% | 37,202 psi | 72% | 2346 fps | 95.4% |
| Lovex S071 | <<locked>> | 96% | 34,330 psi | 67% | 2329 fps | 95.3% |
| Norma MRP | 42.6 gr | 92% | 38,072 psi | 74% | 2490 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 33,141 psi | 64% | 2310 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 82% | 34,243 psi | 67% | 2343 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,398 psi | 53% | 1470 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,047 psi | 84% | 2444 fps | 97.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,030 psi | 76% | 2490 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,663 psi | 63% | 2326 fps | 96.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 32,300 psi | 63% | 2323 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 39,856 psi | 77% | 2402 fps | 99.7% |
| Rottweil R 905 | <<locked>> | 94% | 43,236 psi | 84% | 2526 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 82% | 40,147 psi | 78% | 2379 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,608 psi | 71% | 2313 fps | 96.4% |
| Shooters World SW4350 | <<locked>> | 82% | 37,202 psi | 72% | 2346 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,683 psi | 79% | 2448 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,582 psi | 81% | 2326 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 38,130 psi | 74% | 2310 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 42,815 psi | 83% | 2520 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 40,379 psi | 78% | 2405 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 29,776 psi | 58% | 2267 fps | 98.7% |
| Somchem S385 | <<locked>> | 92% | 40,944 psi | 80% | 2454 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 38,522 psi | 75% | 2343 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 34,548 psi | 67% | 2310 fps | 97% |
| Vihtavuori N165 | <<locked>> | 98% | 42,801 psi | 83% | 2477 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 33,866 psi | 66% | 2306 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 82% | 27,340 psi | 53% | 2208 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,953 psi | 66% | 2287 fps | 98.8% |
| Winchester 760 | <<locked>> | 82% | 37,463 psi | 73% | 2405 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 86% | 25,440 psi | 49% | 2211 fps | 95.3% |
| Winchester Supreme 780 | <<locked>> | 96% | 43,381 psi | 84% | 2490 fps | 95% |
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 | 142gr | SUS-TAC HPT. Norma MRP delivers the highest muzzle velocity at 2,657 fps; across all powders the maximum-charge window runs from 1,604 fps to 2,657 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 142.0 gr projectile in 0.264" calls for a 1:7.5 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. Alliant Reloder-26, Norma MRP, Alliant Reloder-16 rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 142gr | SUS-TAC HPT 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.