Load Specifications
Load data in caliber 6.5 x 58 mm Mauser Port. with .264 | 125gr | Peregrine Glider GRM bullet and 55 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 ReloadSwiss RS 62.
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% | 44,411 psi | 86% | 2595 fps | 100% |
| Accurate 3100ᴾ | <<locked>> | 100% | 41,655 psi | 81% | 2638 fps | 96.3% |
| Accurate 4064 | <<locked>> | 84% | 44,831 psi | 87% | 2644 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 44,121 psi | 86% | 2707 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 84% | 43,801 psi | 85% | 2618 fps | 98.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 44,570 psi | 87% | 2762 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 46,412 psi | 90% | 2694 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 82% | 43,816 psi | 85% | 2654 fps | 98.9% |
| Alliant Reloder-16 | <<locked>> | 94% | 46,253 psi | 90% | 2772 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 88% | 43,656 psi | 85% | 2746 fps | 99.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,842 psi | 77% | 2671 fps | 99.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,628 psi | 87% | 2831 fps | 98.5% |
| Bofors RP3 | <<locked>> | 86% | 46,499 psi | 90% | 2703 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 84% | 44,382 psi | 86% | 2657 fps | 98% |
| Hodgdon H414 | <<locked>> | 90% | 44,150 psi | 86% | 2703 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 45,658 psi | 89% | 2707 fps | 99.7% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 45,049 psi | 87% | 2703 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,578 psi | 69% | 1722 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 46,079 psi | 89% | 2654 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 82% | 45,934 psi | 89% | 2628 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 46,035 psi | 89% | 2657 fps | 96.1% |
| IMR 4831 | <<locked>> | 94% | 45,411 psi | 88% | 2710 fps | 98.7% |
| IMR 4895 | <<locked>> | 82% | 44,947 psi | 87% | 2684 fps | 99.4% |
| Lovex S062 | <<locked>> | 84% | 45,934 psi | 89% | 2654 fps | 99.9% |
| Lovex S065 | <<locked>> | 90% | 45,368 psi | 88% | 2651 fps | 97.5% |
| Lovex S070 | <<locked>> | 92% | 46,137 psi | 90% | 2684 fps | 96.6% |
| Norma 203B | <<locked>> | 84% | 46,354 psi | 90% | 2700 fps | 99.5% |
| Norma URP | <<locked>> | 92% | 44,222 psi | 86% | 2703 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 84% | 46,369 psi | 90% | 2720 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 94% | 46,180 psi | 90% | 2753 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,027 psi | 70% | 1762 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 44,759 psi | 87% | 2641 fps | 96.6% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 46,586 psi | 90% | 2808 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 44,237 psi | 86% | 2730 fps | 98.3% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 43,903 psi | 85% | 2746 fps | 97.8% |
| Rottweil R 902 | <<locked>> | 82% | 45,020 psi | 87% | 2618 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 86% | 43,410 psi | 84% | 2644 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 45,368 psi | 88% | 2651 fps | 97.5% |
| Shooters World Precision | <<locked>> | 84% | 45,934 psi | 89% | 2654 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 92% | 46,137 psi | 90% | 2684 fps | 96.6% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 45,194 psi | 88% | 2703 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 46,079 psi | 89% | 2575 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 45,092 psi | 88% | 2602 fps | 96.1% |
| Somchem S355 | <<locked>> | 86% | 44,179 psi | 86% | 2644 fps | 99.5% |
| Somchem S365 | <<locked>> | 96% | 45,078 psi | 88% | 2759 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 44,744 psi | 87% | 2598 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 45,295 psi | 88% | 2608 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 45,382 psi | 88% | 2635 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 46,122 psi | 90% | 2703 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 82% | 43,830 psi | 85% | 2602 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 45,513 psi | 88% | 2710 fps | 98.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,859 psi | 85% | 2746 fps | 99% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 46,064 psi | 89% | 2680 fps | 99.8% |
| Winchester 760 | <<locked>> | 90% | 44,150 psi | 86% | 2703 fps | 95.9% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,578 psi | 69% | 2674 fps | 99% |
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% | 41,481 psi | 81% | 2549 fps | 100% |
| Accurate 3100 | <<locked>> | 98% | 38,827 psi | 75% | 2582 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 39,291 psi | 76% | 2543 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 33,402 psi | 65% | 2480 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 38,551 psi | 75% | 2513 fps | 97.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,495 psi | 81% | 2697 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,247 psi | 74% | 2536 fps | 98.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,104 psi | 80% | 2602 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 84% | 33,823 psi | 66% | 2497 fps | 95.6% |
| Alliant Reloder-17 | 38.5 gr | 80% | 33,011 psi | 64% | 2503 fps | 97.2% |
| Alliant Reloder-23 | <<locked>> | 90% | 29,008 psi | 56% | 2392 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 94% | 36,042 psi | 70% | 2638 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 37,811 psi | 73% | 2536 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 80% | 38,696 psi | 75% | 2543 fps | 96.6% |
| Hodgdon H414 | <<locked>> | 88% | 41,394 psi | 80% | 2648 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 28,877 psi | 56% | 2339 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,192 psi | 82% | 2651 fps | 99.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,440 psi | 51% | 1535 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,495 psi | 79% | 2549 fps | 98.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,149 psi | 84% | 2572 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 86% | 43,236 psi | 84% | 2602 fps | 95.4% |
| IMR 4831 | <<locked>> | 84% | 32,343 psi | 63% | 2438 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 42,134 psi | 82% | 2628 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 40,379 psi | 78% | 2549 fps | 99.5% |
| Lovex S065 | <<locked>> | 84% | 37,565 psi | 73% | 2493 fps | 95.3% |
| Lovex S070 | <<locked>> | 88% | 40,669 psi | 79% | 2579 fps | 95% |
| Norma 203B | <<locked>> | 80% | 40,451 psi | 79% | 2589 fps | 98.7% |
| Norma URP | <<locked>> | 84% | 33,678 psi | 65% | 2480 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 40,176 psi | 78% | 2602 fps | 98.5% |
| Ramshot Hunter | <<locked>> | 90% | 40,422 psi | 79% | 2638 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,643 psi | 52% | 1572 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,204 psi | 76% | 2530 fps | 95% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,172 psi | 68% | 2569 fps | 99.6% |
| ReloadSwiss RS 62 | 41.4 gr | 86% | 35,694 psi | 69% | 2552 fps | 95.9% |
| ReloadSwiss RS 70 | 42.1 gr | 86% | 35,795 psi | 70% | 2562 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 42,206 psi | 82% | 2569 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 35,549 psi | 69% | 2484 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 84% | 37,565 psi | 73% | 2493 fps | 95.3% |
| Shooters World Precision | <<locked>> | 80% | 40,379 psi | 78% | 2549 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 88% | 40,669 psi | 79% | 2579 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,695 psi | 71% | 2536 fps | 97.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,101 psi | 74% | 2434 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 42,264 psi | 82% | 2546 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 36,405 psi | 71% | 2490 fps | 98.2% |
| Somchem S365 | <<locked>> | 80% | 26,295 psi | 51% | 2316 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 41,843 psi | 81% | 2549 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,453 psi | 82% | 2559 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,635 psi | 67% | 2428 fps | 98.8% |
| Vihtavuori N160 | <<locked>> | 84% | 35,418 psi | 69% | 2490 fps | 96% |
| Vihtavuori N540 | <<locked>> | 80% | 40,872 psi | 79% | 2549 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 34,722 psi | 67% | 2484 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 90% | 31,241 psi | 61% | 2470 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,661 psi | 60% | 2352 fps | 96.4% |
| Winchester 760 | <<locked>> | 88% | 41,394 psi | 80% | 2648 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 94% | 29,211 psi | 57% | 2474 fps | 95.8% |
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 55 powders for 6.5 x 58 mm Mauser Port. loaded with the .264 | 125gr | Peregrine Glider GRM. Alliant Reloder-26 delivers the highest muzzle velocity at 2,831 fps; across all powders the maximum-charge window runs from 1,722 fps to 2,831 fps. Accurate 3100 gives the best case fill at 100 %, and 55 of the 55 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 125.0 gr projectile in 0.264" calls for a 1:7.5 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, ReloadSwiss RS 62 rank at the top here: for 6.5 x 58 mm Mauser Port. with the .264 | 125gr | Peregrine Glider GRM 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.