Load Specifications
Load data in caliber 6.5 x 57 R with .264 | 135gr | Peregrine Glider GRM bullet and 41 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Winchester StaBALL HD and Somchem S365.
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 2700 | <<locked>> | 82% | 43,265 psi | 90% | 2490 fps | 96% |
| Accurate 3100 | <<locked>> | 96% | 41,104 psi | 86% | 2552 fps | 97.4% |
| Accurate 4350 | <<locked>> | 88% | 43,279 psi | 90% | 2608 fps | 99.1% |
| Alliant Reloder-16 | <<locked>> | 88% | 42,250 psi | 88% | 2621 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 84% | 42,337 psi | 88% | 2641 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 98% | 42,061 psi | 88% | 2638 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,247 psi | 82% | 2602 fps | 97.5% |
| Alliant Reloder-26 | <<locked>> | 94% | 40,698 psi | 85% | 2680 fps | 98.7% |
| Bofors RP7 | <<locked>> | 84% | 42,699 psi | 89% | 2523 fps | 96.1% |
| Hodgdon H414 | <<locked>> | 82% | 40,828 psi | 85% | 2566 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 42,076 psi | 88% | 2562 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 86% | 42,250 psi | 88% | 2621 fps | 96.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,882 psi | 75% | 1677 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 43,250 psi | 90% | 2556 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 82% | 41,640 psi | 87% | 2503 fps | 96.3% |
| IMR 4831 | <<locked>> | 92% | 42,569 psi | 89% | 2582 fps | 99.1% |
| Lovex S065 | <<locked>> | 84% | 41,452 psi | 87% | 2503 fps | 97.7% |
| Lovex S070 | <<locked>> | 86% | 41,916 psi | 88% | 2533 fps | 96.7% |
| Lovex S071ᴾ | <<locked>> | 100% | 39,305 psi | 82% | 2520 fps | 96.9% |
| Norma MRP | <<locked>> | 94% | 40,756 psi | 85% | 2641 fps | 96.1% |
| Norma URP | <<locked>> | 88% | 43,279 psi | 90% | 2608 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 88% | 42,018 psi | 88% | 2595 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,405 psi | 76% | 1716 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 42,047 psi | 88% | 2641 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 43,134 psi | 90% | 2631 fps | 98.9% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 42,583 psi | 89% | 2651 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 82% | 42,511 psi | 89% | 2546 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 84% | 42,699 psi | 89% | 2523 fps | 96.1% |
| Shooters World Long Rifle | <<locked>> | 84% | 41,452 psi | 87% | 2503 fps | 97.7% |
| Shooters World SW4350 | <<locked>> | 86% | 41,916 psi | 88% | 2533 fps | 96.7% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 40,640 psi | 85% | 2448 fps | 96.2% |
| Somchem S355 | <<locked>> | 82% | 42,844 psi | 90% | 2543 fps | 99.8% |
| Somchem S365 | <<locked>> | 90% | 41,800 psi | 87% | 2615 fps | 100% |
| Unknown powder | <<locked>> | 84% | 40,901 psi | 85% | 2556 fps | 98.1% |
| Vihtavuori N150 | <<locked>> | 86% | 41,742 psi | 87% | 2493 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 41,234 psi | 86% | 2533 fps | 98.6% |
| Vihtavuori N550 | <<locked>> | 84% | 41,568 psi | 87% | 2572 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 94% | 40,857 psi | 85% | 2605 fps | 99.2% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 41,611 psi | 87% | 2530 fps | 99.9% |
| Winchester 760 | <<locked>> | 82% | 40,828 psi | 85% | 2566 fps | 96.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,190 psi | 84% | 2726 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 2700 | <<locked>> | 80% | 40,451 psi | 85% | 2438 fps | 95.2% |
| Accurate 3100 | <<locked>> | 92% | 35,737 psi | 75% | 2444 fps | 95.7% |
| Accurate 4350 | <<locked>> | 80% | 32,619 psi | 68% | 2385 fps | 96.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,663 psi | 68% | 2402 fps | 96.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,782 psi | 77% | 2526 fps | 99.3% |
| Alliant Reloder-23 | <<locked>> | 84% | 26,832 psi | 56% | 2267 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 96% | 34,534 psi | 72% | 2487 fps | 95.6% |
| Alliant Reloder-26 | 45 gr | 88% | 32,924 psi | 69% | 2493 fps | 96% |
| Bofors RP7 | <<locked>> | 82% | 40,161 psi | 84% | 2470 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 80% | 38,058 psi | 80% | 2507 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,168 psi | 63% | 2306 fps | 97.4% |
| Hodgdon Superformance | <<locked>> | 84% | 39,436 psi | 82% | 2562 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,731 psi | 56% | 1496 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 40,683 psi | 85% | 2507 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,160 psi | 82% | 2451 fps | 95.5% |
| IMR 4831 | <<locked>> | 82% | 30,661 psi | 64% | 2323 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 36,434 psi | 76% | 2398 fps | 96.3% |
| Lovex S070 | <<locked>> | 82% | 37,043 psi | 77% | 2431 fps | 95.2% |
| Lovex S071 | <<locked>> | 96% | 34,447 psi | 72% | 2415 fps | 95.2% |
| Norma MRP | <<locked>> | 92% | 38,043 psi | 79% | 2582 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 32,982 psi | 69% | 2388 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 82% | 34,432 psi | 72% | 2431 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,267 psi | 57% | 1535 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,204 psi | 82% | 2585 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,387 psi | 68% | 2402 fps | 96% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 32,140 psi | 67% | 2405 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 39,566 psi | 83% | 2490 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 82% | 40,161 psi | 84% | 2470 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,434 psi | 76% | 2398 fps | 96.3% |
| Shooters World SW4350 | <<locked>> | 82% | 37,043 psi | 77% | 2431 fps | 95.2% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 38,174 psi | 80% | 2402 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 40,248 psi | 84% | 2493 fps | 99.6% |
| Somchem S365 | 37.8 gr | 80% | 29,472 psi | 62% | 2343 fps | 98.5% |
| Unknown powder | <<locked>> | 80% | 35,752 psi | 75% | 2444 fps | 96.7% |
| Vihtavuori N150 | <<locked>> | 80% | 34,447 psi | 72% | 2349 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 35,810 psi | 75% | 2421 fps | 97.3% |
| Vihtavuori N550 | <<locked>> | 80% | 36,448 psi | 76% | 2464 fps | 97.4% |
| Vihtavuori N555 | <<locked>> | 84% | 29,153 psi | 61% | 2339 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,794 psi | 71% | 2369 fps | 98.7% |
| Winchester 760 | <<locked>> | 80% | 38,058 psi | 80% | 2507 fps | 95.4% |
| Winchester StaBALL HD | 43.2 gr | 88% | 26,803 psi | 56% | 2346 fps | 96.2% |
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 66 powders for 6.5 x 57 R loaded with the .264 | 135gr | Peregrine Glider GRM. Winchester StaBALL HD delivers the highest muzzle velocity at 2,726 fps; across all powders the maximum-charge window runs from 1,677 fps to 2,726 fps. Alliant Reloder-25 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 135.0 gr projectile in 0.264" calls for a 1:7.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-25, Hodgdon Retumbo, 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, Winchester StaBALL HD, Somchem S365 rank at the top here: for 6.5 x 57 R with the .264 | 135gr | Peregrine Glider GRM they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2209, ADI AR 2213, 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.