Load Specifications
Load data in caliber 7 x 57 R with .284 | 168gr | Berger Classic Hybrid Hunter bullet and 48 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 3100ᴾ | <<locked>> | 100% | 42,003 psi | 85% | 2425 fps | 97% |
| Accurate 4064 | <<locked>> | 82% | 43,018 psi | 87% | 2379 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 44,556 psi | 90% | 2484 fps | 99% |
| ADI AR 2208 | <<locked>> | 84% | 44,222 psi | 90% | 2398 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 44,005 psi | 89% | 2418 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 82% | 44,324 psi | 90% | 2431 fps | 99.3% |
| Alliant Reloder-16 | <<locked>> | 92% | 43,758 psi | 89% | 2493 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 88% | 43,888 psi | 89% | 2520 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,205 psi | 82% | 2457 fps | 99.5% |
| Alliant Reloder-26 | <<locked>> | 98% | 41,698 psi | 85% | 2546 fps | 98.3% |
| Bofors RP3 | <<locked>> | 84% | 44,048 psi | 89% | 2431 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 82% | 42,119 psi | 85% | 2388 fps | 98.1% |
| Hodgdon H414 | <<locked>> | 90% | 44,396 psi | 90% | 2484 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 43,062 psi | 87% | 2434 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 90% | 44,106 psi | 89% | 2500 fps | 96% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,578 psi | 72% | 1545 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 43,772 psi | 89% | 2382 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 43,526 psi | 88% | 2382 fps | 96.2% |
| IMR 4831 | <<locked>> | 92% | 42,888 psi | 87% | 2441 fps | 98.8% |
| Lovex S062 | <<locked>> | 82% | 43,758 psi | 89% | 2385 fps | 99.9% |
| Lovex S065 | <<locked>> | 88% | 43,265 psi | 88% | 2388 fps | 97.6% |
| Lovex S070 | <<locked>> | 90% | 43,540 psi | 88% | 2411 fps | 96.6% |
| Norma 203B | <<locked>> | 82% | 43,700 psi | 89% | 2421 fps | 99.5% |
| Norma URP | <<locked>> | 92% | 44,527 psi | 90% | 2480 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 82% | 43,627 psi | 88% | 2441 fps | 99.5% |
| Ramshot Hunter | <<locked>> | 92% | 43,163 psi | 88% | 2470 fps | 97.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,085 psi | 73% | 1581 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 42,409 psi | 86% | 2372 fps | 96.7% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 43,685 psi | 89% | 2520 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 44,309 psi | 90% | 2507 fps | 98.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 44,164 psi | 90% | 2523 fps | 98.4% |
| Rottweil R 903 | <<locked>> | 86% | 44,237 psi | 90% | 2428 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 43,265 psi | 88% | 2388 fps | 97.6% |
| Shooters World Precision | <<locked>> | 82% | 43,758 psi | 89% | 2385 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 90% | 43,540 psi | 88% | 2411 fps | 96.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 42,583 psi | 86% | 2431 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 43,700 psi | 89% | 2310 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 42,554 psi | 86% | 2333 fps | 96% |
| Somchem S355 | <<locked>> | 84% | 42,032 psi | 85% | 2379 fps | 99.6% |
| Somchem S365 | <<locked>> | 94% | 42,395 psi | 86% | 2484 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 42,888 psi | 87% | 2365 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 43,569 psi | 88% | 2431 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 82% | 44,222 psi | 90% | 2379 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 42,743 psi | 87% | 2434 fps | 98.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,208 psi | 90% | 2523 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 43,279 psi | 88% | 2411 fps | 99.8% |
| Winchester 760 | <<locked>> | 90% | 44,396 psi | 90% | 2484 fps | 96.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,810 psi | 73% | 2467 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 3100 | <<locked>> | 96% | 36,622 psi | 74% | 2326 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 40,451 psi | 82% | 2339 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 31,662 psi | 64% | 2231 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 39,189 psi | 79% | 2306 fps | 98.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,943 psi | 79% | 2329 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,727 psi | 85% | 2385 fps | 99% |
| Alliant Reloder-16 | 37.5 gr | 82% | 32,111 psi | 65% | 2244 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,489 psi | 68% | 2306 fps | 98.1% |
| Alliant Reloder-23 | <<locked>> | 88% | 27,949 psi | 57% | 2165 fps | 95.5% |
| Alliant Reloder-26 | 46.5 gr | 92% | 33,997 psi | 69% | 2375 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 38,551 psi | 78% | 2333 fps | 99.4% |
| Hodgdon H380 | <<locked>> | 80% | 39,320 psi | 80% | 2336 fps | 97.5% |
| Hodgdon H414 | <<locked>> | 86% | 39,015 psi | 79% | 2382 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,789 psi | 56% | 2110 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 88% | 41,234 psi | 84% | 2444 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,701 psi | 54% | 1381 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,118 psi | 83% | 2336 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 84% | 41,002 psi | 83% | 2339 fps | 95.4% |
| IMR 4831 | <<locked>> | 82% | 30,922 psi | 63% | 2198 fps | 95.4% |
| Lovex S062 | <<locked>> | 80% | 41,191 psi | 84% | 2339 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 35,969 psi | 73% | 2244 fps | 95.5% |
| Lovex S070 | <<locked>> | 86% | 38,624 psi | 78% | 2320 fps | 95.1% |
| Norma 203B | <<locked>> | 80% | 41,089 psi | 83% | 2375 fps | 99.2% |
| Norma URP | <<locked>> | 82% | 32,126 psi | 65% | 2234 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 40,785 psi | 83% | 2392 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 88% | 38,072 psi | 77% | 2369 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,948 psi | 55% | 1414 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,697 psi | 81% | 2320 fps | 95.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 35,636 psi | 72% | 2362 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 31,546 psi | 64% | 2247 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 33,866 psi | 69% | 2303 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 36,376 psi | 74% | 2283 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 82% | 35,969 psi | 73% | 2244 fps | 95.5% |
| Shooters World Precision | <<locked>> | 80% | 41,191 psi | 84% | 2339 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 38,624 psi | 78% | 2320 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,188 psi | 75% | 2329 fps | 98.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,827 psi | 79% | 2231 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 39,987 psi | 81% | 2290 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 37,188 psi | 75% | 2287 fps | 98.9% |
| Somchem S365 | 37.4 gr | 80% | 27,050 psi | 55% | 2142 fps | 97.1% |
| Vihtavuori N150 | <<locked>> | 80% | 35,331 psi | 72% | 2231 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 31,430 psi | 64% | 2188 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 41,379 psi | 84% | 2333 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 33,083 psi | 67% | 2241 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 88% | 29,762 psi | 60% | 2228 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,270 psi | 63% | 2169 fps | 97.4% |
| Winchester 760 | <<locked>> | 86% | 39,015 psi | 79% | 2382 fps | 95.1% |
| Winchester StaBALL HD | <<locked>> | 92% | 27,760 psi | 56% | 2231 fps | 96% |
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 48 powders for 7 x 57 R loaded with the .284 | 168gr | Berger Classic Hybrid Hunter. Alliant Reloder-26 delivers the highest muzzle velocity at 2,546 fps; across all powders the maximum-charge window runs from 1,545 fps to 2,546 fps. Accurate 3100 gives the best case fill at 100 %, and 48 of the 48 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 168.0 gr projectile in 0.284" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, 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, Alliant Reloder-16, Somchem S365 rank at the top here: for 7 x 57 R with the .284 | 168gr | Berger Classic Hybrid Hunter 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.