Load Specifications
Load data in caliber 7 x 57 R with .284 | 166gr | Peregrine VRG-2 bullet and 53 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Alliant Reloder-16 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 2495 | <<locked>> | 82% | 44,367 psi | 90% | 2395 fps | 100% |
| Accurate 3100ᴾ | <<locked>> | 100% | 41,220 psi | 84% | 2441 fps | 96.9% |
| Accurate 4064 | <<locked>> | 84% | 44,614 psi | 90% | 2438 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 44,063 psi | 89% | 2507 fps | 99% |
| ADI AR 2208 | <<locked>> | 84% | 43,743 psi | 89% | 2418 fps | 99.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 44,324 psi | 90% | 2552 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 43,642 psi | 89% | 2441 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 82% | 43,961 psi | 89% | 2454 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 92% | 43,250 psi | 88% | 2513 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 88% | 43,308 psi | 88% | 2539 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,653 psi | 80% | 2474 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,179 psi | 90% | 2625 fps | 98.9% |
| Bofors RP3 | <<locked>> | 84% | 43,424 psi | 88% | 2451 fps | 99.9% |
| Bofors RP7 | <<locked>> | 88% | 44,179 psi | 90% | 2425 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 84% | 44,237 psi | 90% | 2454 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 90% | 43,801 psi | 89% | 2500 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 42,772 psi | 87% | 2457 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,476 psi | 72% | 1565 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 43,250 psi | 88% | 2402 fps | 99.2% |
| IMR 4350 | <<locked>> | 92% | 44,251 psi | 90% | 2448 fps | 95.9% |
| IMR 4451 Enduron | <<locked>> | 86% | 43,192 psi | 88% | 2408 fps | 96.1% |
| IMR 4831 | <<locked>> | 92% | 42,206 psi | 86% | 2457 fps | 98.7% |
| Lovex S062 | <<locked>> | 82% | 43,105 psi | 87% | 2402 fps | 99.9% |
| Lovex S065 | <<locked>> | 88% | 42,453 psi | 86% | 2402 fps | 97.4% |
| Lovex S070 | <<locked>> | 90% | 42,931 psi | 87% | 2431 fps | 96.5% |
| Norma 203B | <<locked>> | 82% | 43,294 psi | 88% | 2444 fps | 99.5% |
| Norma MRPᴾ | <<locked>> | 100% | 44,266 psi | 90% | 2585 fps | 96.4% |
| Norma URP | <<locked>> | 92% | 43,961 psi | 89% | 2500 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 82% | 42,917 psi | 87% | 2457 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 92% | 42,757 psi | 87% | 2490 fps | 97.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,897 psi | 73% | 1601 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 44,498 psi | 90% | 2438 fps | 97.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 43,163 psi | 88% | 2539 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 43,772 psi | 89% | 2523 fps | 98.7% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 43,685 psi | 89% | 2543 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 86% | 43,294 psi | 88% | 2441 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 88% | 44,179 psi | 90% | 2425 fps | 95.9% |
| Shooters World Long Rifle | <<locked>> | 88% | 42,453 psi | 86% | 2402 fps | 97.4% |
| Shooters World Precision | <<locked>> | 82% | 43,105 psi | 87% | 2402 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 90% | 42,931 psi | 87% | 2431 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 41,887 psi | 85% | 2444 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 43,207 psi | 88% | 2329 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 41,945 psi | 85% | 2352 fps | 95.9% |
| Somchem S355 | <<locked>> | 86% | 44,193 psi | 90% | 2444 fps | 99.8% |
| Somchem S365 | <<locked>> | 94% | 41,989 psi | 85% | 2507 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 42,105 psi | 85% | 2382 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 43,004 psi | 87% | 2451 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 82% | 43,526 psi | 88% | 2395 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 42,105 psi | 85% | 2448 fps | 98.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,584 psi | 88% | 2543 fps | 99.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 42,844 psi | 87% | 2431 fps | 99.8% |
| Winchester 760 | <<locked>> | 90% | 44,121 psi | 89% | 2507 fps | 96.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,317 psi | 72% | 2480 fps | 99.5% |
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% | 41,655 psi | 84% | 2352 fps | 100% |
| Accurate 3100 | <<locked>> | 96% | 35,897 psi | 73% | 2339 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 39,421 psi | 80% | 2349 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 30,980 psi | 63% | 2244 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 38,740 psi | 79% | 2326 fps | 98.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,408 psi | 84% | 2497 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,348 psi | 78% | 2346 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,089 psi | 83% | 2402 fps | 98.9% |
| Alliant Reloder-16 | 38.4 gr | 82% | 31,531 psi | 64% | 2257 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 32,996 psi | 67% | 2323 fps | 98% |
| Alliant Reloder-23 | <<locked>> | 88% | 27,122 psi | 55% | 2169 fps | 95.1% |
| Alliant Reloder-26 | 47.6 gr | 92% | 33,301 psi | 68% | 2385 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 37,753 psi | 77% | 2346 fps | 99.3% |
| Bofors RP7 | <<locked>> | 86% | 41,321 psi | 84% | 2372 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 38,580 psi | 78% | 2349 fps | 97.3% |
| Hodgdon H414 | <<locked>> | 88% | 40,930 psi | 83% | 2448 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 26,977 psi | 55% | 2113 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,484 psi | 54% | 1398 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,683 psi | 83% | 2356 fps | 98.9% |
| IMR 4350 | <<locked>> | 90% | 41,713 psi | 85% | 2402 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 84% | 40,451 psi | 82% | 2356 fps | 95.3% |
| IMR 4831 | <<locked>> | 82% | 30,168 psi | 61% | 2208 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 40,263 psi | 82% | 2352 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 35,215 psi | 71% | 2257 fps | 95.3% |
| Lovex S070 | <<locked>> | 88% | 40,422 psi | 82% | 2382 fps | 95.8% |
| Norma 203B | <<locked>> | 80% | 40,466 psi | 82% | 2392 fps | 99.1% |
| Norma MRP | <<locked>> | 98% | 41,336 psi | 84% | 2526 fps | 95.5% |
| Norma URP | <<locked>> | 82% | 31,444 psi | 64% | 2244 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 40,103 psi | 81% | 2405 fps | 99% |
| Ramshot Hunter | <<locked>> | 88% | 37,449 psi | 76% | 2385 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,687 psi | 54% | 1430 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,015 psi | 79% | 2336 fps | 95.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,201 psi | 71% | 2382 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 33,156 psi | 67% | 2313 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 35,549 psi | 72% | 2372 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 35,578 psi | 72% | 2297 fps | 98.7% |
| Rottweil R 907 | <<locked>> | 86% | 41,321 psi | 84% | 2372 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 82% | 35,215 psi | 71% | 2257 fps | 95.3% |
| Shooters World Precision | <<locked>> | 80% | 40,263 psi | 82% | 2352 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 88% | 40,422 psi | 82% | 2382 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,782 psi | 75% | 2346 fps | 98.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,145 psi | 77% | 2244 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 39,421 psi | 80% | 2306 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 36,506 psi | 74% | 2303 fps | 98.8% |
| Somchem S365 | 38.3 gr | 80% | 26,310 psi | 53% | 2149 fps | 96.7% |
| Vihtavuori N150 | <<locked>> | 80% | 34,679 psi | 70% | 2244 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 30,806 psi | 62% | 2198 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 40,741 psi | 83% | 2349 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 32,314 psi | 66% | 2247 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 88% | 29,051 psi | 59% | 2238 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,560 psi | 62% | 2178 fps | 97.2% |
| Winchester 760 | <<locked>> | 88% | 41,191 psi | 84% | 2451 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 92% | 27,108 psi | 55% | 2238 fps | 95.5% |
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 53 powders for 7 x 57 R loaded with the .284 | 166gr | Peregrine VRG-2. Alliant Reloder-26 delivers the highest muzzle velocity at 2,625 fps; across all powders the maximum-charge window runs from 1,565 fps to 2,625 fps. Accurate 3100 gives the best case fill at 100 %, and 53 of the 53 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 72–90 %, leaving at least 10 % headroom. The 166.0 gr projectile in 0.284" calls for a 1:11.0 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. Alliant Reloder-26, Alliant Reloder-16, Somchem S365 rank at the top here: for 7 x 57 R with the .284 | 166gr | Peregrine VRG-2 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.