Load Specifications
Load data in caliber 6.5 x 57 R with .264 | 125gr | Peregrine Glider GRM bullet and 36 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Vihtavuori N555 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% | 41,684 psi | 87% | 2657 fps | 96.7% |
| Accurate 4350 | <<locked>> | 88% | 41,147 psi | 86% | 2667 fps | 98.2% |
| ADI AR 2208 | <<locked>> | 82% | 43,236 psi | 90% | 2631 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 43,076 psi | 90% | 2651 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 90% | 43,105 psi | 90% | 2736 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 84% | 40,190 psi | 84% | 2697 fps | 99.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,409 psi | 89% | 2743 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 96% | 41,408 psi | 87% | 2785 fps | 98.1% |
| Bofors RP3 | <<locked>> | 82% | 43,004 psi | 90% | 2661 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 42,815 psi | 89% | 2677 fps | 99.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,694 psi | 75% | 1749 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 42,453 psi | 89% | 2608 fps | 99% |
| IMR 4831 | <<locked>> | 94% | 43,236 psi | 90% | 2694 fps | 98.7% |
| Lovex S065 | <<locked>> | 86% | 42,177 psi | 88% | 2615 fps | 97.1% |
| Lovex S070 | <<locked>> | 88% | 42,757 psi | 89% | 2644 fps | 96.1% |
| Norma URP | <<locked>> | 88% | 41,046 psi | 86% | 2664 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 90% | 42,888 psi | 90% | 2710 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,143 psi | 76% | 1788 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 42,830 psi | 89% | 2756 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 40,901 psi | 85% | 2687 fps | 97.9% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 40,625 psi | 85% | 2703 fps | 97.4% |
| Rottweil R 903 | <<locked>> | 84% | 43,163 psi | 90% | 2657 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 86% | 42,177 psi | 88% | 2615 fps | 97.1% |
| Shooters World SW4350 | <<locked>> | 88% | 42,757 psi | 89% | 2644 fps | 96.1% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 41,814 psi | 87% | 2661 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 42,627 psi | 89% | 2536 fps | 100% |
| Somchem S355 | <<locked>> | 82% | 41,031 psi | 86% | 2605 fps | 99.3% |
| Somchem S365 | <<locked>> | 92% | 42,279 psi | 88% | 2726 fps | 100% |
| Unknown powder | <<locked>> | 86% | 41,742 psi | 87% | 2667 fps | 97.6% |
| Vihtavuori N135 | <<locked>> | 84% | 42,714 psi | 89% | 2582 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 42,496 psi | 89% | 2608 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 86% | 42,018 psi | 88% | 2644 fps | 98.2% |
| Vihtavuori N550 | <<locked>> | 86% | 42,337 psi | 88% | 2684 fps | 98.2% |
| Vihtavuori N555 | <<locked>> | 96% | 41,423 psi | 87% | 2717 fps | 98.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 42,525 psi | 89% | 2641 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,130 psi | 80% | 2766 fps | 99.8% |
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>> | 94% | 36,303 psi | 76% | 2546 fps | 95% |
| Accurate 4350 | <<locked>> | 82% | 33,243 psi | 69% | 2493 fps | 95.8% |
| ADI AR 2208 | <<locked>> | 80% | 40,683 psi | 85% | 2579 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,495 psi | 85% | 2602 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 82% | 33,504 psi | 70% | 2510 fps | 96% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,012 psi | 73% | 2575 fps | 98.3% |
| Alliant Reloder-23 | <<locked>> | 88% | 29,022 psi | 61% | 2415 fps | 95.7% |
| Alliant Reloder-26 | 46.8 gr | 90% | 33,402 psi | 70% | 2589 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 40,089 psi | 84% | 2602 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,790 psi | 60% | 2352 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,440 psi | 55% | 1558 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,900 psi | 83% | 2559 fps | 98.5% |
| IMR 4831 | <<locked>> | 86% | 33,373 psi | 70% | 2477 fps | 95.9% |
| Lovex S065 | <<locked>> | 82% | 37,144 psi | 78% | 2507 fps | 95.6% |
| Lovex S070 | <<locked>> | 86% | 40,263 psi | 84% | 2592 fps | 95.4% |
| Norma URP | <<locked>> | 82% | 33,692 psi | 70% | 2500 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 86% | 37,492 psi | 78% | 2595 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,934 psi | 56% | 1598 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,318 psi | 78% | 2641 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 33,083 psi | 69% | 2510 fps | 95.3% |
| ReloadSwiss RS 70 | 43.3 gr | 84% | 35,273 psi | 74% | 2572 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 37,768 psi | 79% | 2549 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 82% | 37,144 psi | 78% | 2507 fps | 95.6% |
| Shooters World SW4350 | <<locked>> | 86% | 40,263 psi | 84% | 2592 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,015 psi | 82% | 2605 fps | 98.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,045 psi | 84% | 2490 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 38,595 psi | 81% | 2556 fps | 98.9% |
| Somchem S365 | <<locked>> | 80% | 27,992 psi | 58% | 2388 fps | 97.1% |
| Unknown powder | <<locked>> | 80% | 34,069 psi | 71% | 2497 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 80% | 37,536 psi | 78% | 2487 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,779 psi | 68% | 2405 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 80% | 34,084 psi | 71% | 2474 fps | 95.9% |
| Vihtavuori N550 | <<locked>> | 80% | 34,693 psi | 72% | 2516 fps | 96% |
| Vihtavuori N555 | 41.8 gr | 88% | 31,531 psi | 66% | 2490 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,474 psi | 68% | 2421 fps | 97.6% |
| Winchester StaBALL HD | <<locked>> | 90% | 27,253 psi | 57% | 2431 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 66 powders for 6.5 x 57 R loaded with the .264 | 125gr | Peregrine Glider GRM. Alliant Reloder-26 delivers the highest muzzle velocity at 2,785 fps; across all powders the maximum-charge window runs from 1,749 fps to 2,785 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 66 of the 66 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 75–90 %, 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. Alliant Reloder-23, Alliant Reloder-25, Bofors RP15 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, Vihtavuori N555, ReloadSwiss RS 70 rank at the top here: for 6.5 x 57 R with the .264 | 125gr | Peregrine Glider GRM they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, ADI AR 2209, Alliant Reloder-19 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.