Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 127gr | Barnes LRX BT bullet and 57 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-17 and Alliant Reloder-26.
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>> | 82% | 45,556 psi | 88% | 2595 fps | 100% |
| Accurate 3100ᴾ | <<locked>> | 100% | 42,699 psi | 83% | 2641 fps | 96.8% |
| Accurate 4064 | <<locked>> | 84% | 45,934 psi | 89% | 2641 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 45,252 psi | 88% | 2707 fps | 98.8% |
| ADI AR 2208 | <<locked>> | 84% | 44,759 psi | 87% | 2618 fps | 99% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 45,614 psi | 89% | 2766 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 44,570 psi | 87% | 2641 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 82% | 44,831 psi | 87% | 2654 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 92% | 44,338 psi | 86% | 2720 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 88% | 44,686 psi | 87% | 2746 fps | 99.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,741 psi | 79% | 2671 fps | 99.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 46,006 psi | 89% | 2841 fps | 98.9% |
| Bofors RP3 | <<locked>> | 84% | 44,266 psi | 86% | 2644 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 84% | 45,382 psi | 88% | 2657 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 90% | 45,194 psi | 88% | 2707 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 43,758 psi | 85% | 2654 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 46,108 psi | 90% | 2703 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,650 psi | 69% | 1713 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 44,164 psi | 86% | 2602 fps | 99.1% |
| IMR 4350 | <<locked>> | 92% | 45,469 psi | 88% | 2651 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 86% | 44,135 psi | 86% | 2605 fps | 95.9% |
| IMR 4831 | <<locked>> | 94% | 46,485 psi | 90% | 2710 fps | 99% |
| IMR 4895 | <<locked>> | 82% | 45,963 psi | 89% | 2684 fps | 99.6% |
| Lovex S062 | <<locked>> | 82% | 44,048 psi | 86% | 2602 fps | 99.9% |
| Lovex S065 | <<locked>> | 90% | 46,296 psi | 90% | 2651 fps | 97.9% |
| Lovex S070 | <<locked>> | 90% | 43,947 psi | 85% | 2628 fps | 96.3% |
| Norma 203B | <<locked>> | 82% | 44,150 psi | 86% | 2641 fps | 99.4% |
| Norma MRPᴾ | <<locked>> | 100% | 45,658 psi | 89% | 2792 fps | 96.3% |
| Norma URP | <<locked>> | 92% | 45,310 psi | 88% | 2707 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 82% | 44,193 psi | 86% | 2661 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 92% | 43,990 psi | 85% | 2690 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,129 psi | 70% | 1752 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 45,716 psi | 89% | 2641 fps | 97.1% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 44,338 psi | 86% | 2749 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 45,339 psi | 88% | 2733 fps | 98.6% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 44,846 psi | 87% | 2749 fps | 98.2% |
| Rottweil R 902 | <<locked>> | 82% | 45,701 psi | 89% | 2612 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 86% | 44,469 psi | 86% | 2644 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 46,296 psi | 90% | 2651 fps | 97.9% |
| Shooters World Precision | <<locked>> | 82% | 44,048 psi | 86% | 2602 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 90% | 43,947 psi | 85% | 2628 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 45,919 psi | 89% | 2697 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 44,106 psi | 86% | 2523 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 46,050 psi | 89% | 2602 fps | 96.5% |
| Somchem S355 | <<locked>> | 86% | 45,208 psi | 88% | 2644 fps | 99.7% |
| Somchem S365 | <<locked>> | 96% | 46,209 psi | 90% | 2759 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 46,006 psi | 89% | 2694 fps | 95.9% |
| Vihtavuori N135 | <<locked>> | 82% | 45,513 psi | 88% | 2589 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 46,282 psi | 90% | 2602 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 46,050 psi | 89% | 2628 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 44,208 psi | 86% | 2651 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 82% | 44,512 psi | 86% | 2595 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 46,238 psi | 90% | 2703 fps | 98.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 45,020 psi | 87% | 2746 fps | 99.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 44,135 psi | 86% | 2631 fps | 99.8% |
| Winchester 760 | <<locked>> | 90% | 45,194 psi | 88% | 2707 fps | 96.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,361 psi | 71% | 2680 fps | 99.4% |
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% | 42,583 psi | 83% | 2546 fps | 100% |
| Accurate 3100 | <<locked>> | 96% | 37,217 psi | 72% | 2533 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 40,335 psi | 78% | 2546 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 31,763 psi | 62% | 2421 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 39,421 psi | 77% | 2516 fps | 98.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 42,467 psi | 82% | 2700 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,175 psi | 76% | 2539 fps | 99.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,061 psi | 82% | 2602 fps | 98.7% |
| Alliant Reloder-16 | <<locked>> | 82% | 32,242 psi | 63% | 2438 fps | 95.2% |
| Alliant Reloder-17 | 38.8 gr | 80% | 33,794 psi | 66% | 2510 fps | 97.7% |
| Alliant Reloder-23 | <<locked>> | 90% | 29,689 psi | 58% | 2402 fps | 95.8% |
| Alliant Reloder-26 | 45.7 gr | 92% | 34,360 psi | 67% | 2575 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 38,783 psi | 75% | 2539 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 80% | 39,624 psi | 77% | 2546 fps | 97.1% |
| Hodgdon H414 | <<locked>> | 88% | 42,061 psi | 82% | 2644 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,731 psi | 54% | 2290 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,946 psi | 83% | 2648 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,556 psi | 52% | 1529 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,394 psi | 80% | 2549 fps | 98.7% |
| IMR 4350 | <<locked>> | 90% | 42,728 psi | 83% | 2598 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 84% | 41,495 psi | 81% | 2552 fps | 95.1% |
| IMR 4831 | <<locked>> | 84% | 33,214 psi | 65% | 2441 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 43,120 psi | 84% | 2631 fps | 99.3% |
| Lovex S062 | <<locked>> | 80% | 41,336 psi | 80% | 2552 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 36,042 psi | 70% | 2444 fps | 95% |
| Lovex S070 | <<locked>> | 88% | 41,278 psi | 80% | 2575 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 41,408 psi | 80% | 2589 fps | 99% |
| Norma MRP | <<locked>> | 98% | 42,830 psi | 83% | 2736 fps | 95.5% |
| Norma URP | <<locked>> | 82% | 32,314 psi | 63% | 2428 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 41,133 psi | 80% | 2605 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 38,522 psi | 75% | 2579 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,789 psi | 52% | 1562 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,074 psi | 78% | 2530 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,042 psi | 70% | 2575 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 34,040 psi | 66% | 2500 fps | 95.5% |
| ReloadSwiss RS 70 | 42.3 gr | 86% | 36,332 psi | 71% | 2559 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 43,178 psi | 84% | 2569 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 36,448 psi | 71% | 2484 fps | 98.5% |
| Shooters World Long Rifle | <<locked>> | 82% | 36,042 psi | 70% | 2444 fps | 95% |
| Shooters World Precision | <<locked>> | 80% | 41,336 psi | 80% | 2552 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 41,278 psi | 80% | 2575 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,594 psi | 73% | 2536 fps | 98.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,986 psi | 76% | 2434 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 43,192 psi | 84% | 2549 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 37,275 psi | 72% | 2490 fps | 98.6% |
| Somchem S365 | <<locked>> | 80% | 27,006 psi | 52% | 2323 fps | 96.4% |
| Somchem S385 | <<locked>> | 96% | 43,120 psi | 84% | 2641 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 42,859 psi | 83% | 2546 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,424 psi | 84% | 2556 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,491 psi | 69% | 2428 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 82% | 33,765 psi | 66% | 2434 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 41,785 psi | 81% | 2546 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 33,112 psi | 64% | 2431 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 88% | 30,023 psi | 58% | 2418 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,343 psi | 61% | 2356 fps | 97% |
| Winchester 760 | <<locked>> | 88% | 42,395 psi | 82% | 2654 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 92% | 27,905 psi | 54% | 2415 fps | 95.2% |
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 57 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 127gr | Barnes LRX BT. Alliant Reloder-26 delivers the highest muzzle velocity at 2,841 fps; across all powders the maximum-charge window runs from 1,713 fps to 2,841 fps. Accurate 3100 gives the best case fill at 100 %, and 57 of the 57 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (355 MPa), the top charges use 69–90 %, leaving at least 10 % headroom. The 127.0 gr projectile in 0.264" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-26 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 70, Alliant Reloder-17, Alliant Reloder-26 rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 127gr | Barnes LRX 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.