Load Specifications
Load data in caliber 7 x 57 R with .284 | 160gr | Sierra Tipped MatchKing bullet and 50 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, ReloadSwiss RS 70 and Alliant Reloder-17.
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% | 43,076 psi | 87% | 2402 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 43,294 psi | 88% | 2444 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 41,989 psi | 85% | 2497 fps | 98.1% |
| ADI AR 2208 | <<locked>> | 84% | 42,221 psi | 86% | 2415 fps | 98.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 42,525 psi | 86% | 2539 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 41,858 psi | 85% | 2438 fps | 99.5% |
| Alliant Reloder-15 | <<locked>> | 82% | 42,163 psi | 86% | 2448 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 94% | 44,222 psi | 90% | 2552 fps | 98.7% |
| Alliant Reloder-17 | <<locked>> | 90% | 44,295 psi | 90% | 2582 fps | 99.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 37,869 psi | 77% | 2457 fps | 98.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,061 psi | 85% | 2602 fps | 97.7% |
| Bofors RP3 | <<locked>> | 86% | 44,396 psi | 90% | 2490 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 84% | 42,554 psi | 86% | 2448 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 43,439 psi | 88% | 2493 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 42,917 psi | 87% | 2493 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,520 psi | 72% | 1578 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 44,367 psi | 90% | 2448 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 82% | 44,367 psi | 90% | 2418 fps | 95.7% |
| IMR 4831 | <<locked>> | 94% | 42,859 psi | 87% | 2493 fps | 98.3% |
| IMR 4895 | <<locked>> | 82% | 43,207 psi | 88% | 2477 fps | 99.2% |
| Lovex S062 | <<locked>> | 84% | 44,266 psi | 90% | 2448 fps | 99.8% |
| Lovex S065 | <<locked>> | 90% | 43,801 psi | 89% | 2448 fps | 97.1% |
| Lovex S070 | <<locked>> | 92% | 44,034 psi | 89% | 2470 fps | 96% |
| Norma 203B | <<locked>> | 84% | 44,440 psi | 90% | 2490 fps | 99.3% |
| Norma URP | <<locked>> | 92% | 41,814 psi | 85% | 2490 fps | 97.9% |
| Ramshot Big Game | <<locked>> | 84% | 44,034 psi | 89% | 2503 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 94% | 43,874 psi | 89% | 2533 fps | 96.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,984 psi | 73% | 1617 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 42,946 psi | 87% | 2431 fps | 96.1% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 44,092 psi | 89% | 2582 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 44,440 psi | 90% | 2562 fps | 98.3% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 41,771 psi | 85% | 2526 fps | 97.1% |
| Rottweil R 902 | <<locked>> | 82% | 43,714 psi | 89% | 2418 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 86% | 41,887 psi | 85% | 2444 fps | 99.4% |
| Shooters World Long Rifle | <<locked>> | 90% | 43,801 psi | 89% | 2448 fps | 97.1% |
| Shooters World Precision | <<locked>> | 84% | 44,266 psi | 90% | 2448 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 92% | 44,034 psi | 89% | 2470 fps | 96% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 42,931 psi | 87% | 2490 fps | 99.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 44,411 psi | 90% | 2375 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 42,467 psi | 86% | 2441 fps | 99.3% |
| Somchem S365 | <<locked>> | 96% | 42,598 psi | 86% | 2543 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 43,163 psi | 88% | 2398 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 43,642 psi | 89% | 2405 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 43,410 psi | 88% | 2428 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 92% | 43,918 psi | 89% | 2490 fps | 98.3% |
| Vihtavuori N540 | <<locked>> | 82% | 42,148 psi | 85% | 2402 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 43,062 psi | 87% | 2490 fps | 97.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,147 psi | 83% | 2530 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 44,121 psi | 89% | 2477 fps | 99.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,779 psi | 69% | 2454 fps | 98.3% |
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% | 40,379 psi | 82% | 2359 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 38,203 psi | 77% | 2356 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 31,937 psi | 65% | 2287 fps | 95% |
| ADI AR 2208 | <<locked>> | 80% | 37,347 psi | 76% | 2320 fps | 97.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 39,697 psi | 81% | 2484 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,956 psi | 75% | 2343 fps | 98.7% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,653 psi | 80% | 2398 fps | 98.1% |
| Alliant Reloder-16 | <<locked>> | 84% | 32,663 psi | 66% | 2303 fps | 95.1% |
| Alliant Reloder-17 | 39 gr | 80% | 31,734 psi | 64% | 2310 fps | 96.7% |
| Alliant Reloder-23 | <<locked>> | 92% | 29,834 psi | 61% | 2264 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 96% | 36,593 psi | 74% | 2484 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 36,463 psi | 74% | 2346 fps | 98.7% |
| Hodgdon H380 | <<locked>> | 80% | 37,333 psi | 76% | 2346 fps | 96.2% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 28,021 psi | 57% | 2159 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,306 psi | 82% | 2444 fps | 99.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,295 psi | 53% | 1404 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,175 psi | 79% | 2352 fps | 98% |
| IMR 4166 Enduron | <<locked>> | 80% | 41,785 psi | 85% | 2372 fps | 95% |
| IMR 4831 | <<locked>> | 86% | 33,040 psi | 67% | 2297 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 40,625 psi | 82% | 2428 fps | 98.8% |
| Lovex S062 | <<locked>> | 80% | 39,160 psi | 79% | 2356 fps | 99.3% |
| Lovex S065 | <<locked>> | 86% | 38,580 psi | 78% | 2349 fps | 95.6% |
| Lovex S070 | <<locked>> | 90% | 41,452 psi | 84% | 2421 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 39,030 psi | 79% | 2388 fps | 98.4% |
| Norma URP | <<locked>> | 84% | 32,547 psi | 66% | 2293 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 38,377 psi | 78% | 2398 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 90% | 38,406 psi | 78% | 2425 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,789 psi | 54% | 1444 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 40,408 psi | 82% | 2385 fps | 95.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 33,794 psi | 69% | 2372 fps | 99.4% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 33,881 psi | 69% | 2352 fps | 95.3% |
| ReloadSwiss RS 70 | 43.6 gr | 88% | 36,550 psi | 74% | 2411 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 41,060 psi | 83% | 2372 fps | 99.5% |
| Rottweil R 903 | <<locked>> | 80% | 34,330 psi | 70% | 2293 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 38,580 psi | 78% | 2349 fps | 95.6% |
| Shooters World Precision | <<locked>> | 80% | 39,160 psi | 79% | 2356 fps | 99.3% |
| Shooters World SW4350 | <<locked>> | 90% | 41,452 psi | 84% | 2421 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,215 psi | 71% | 2339 fps | 97.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,970 psi | 75% | 2251 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 35,230 psi | 71% | 2300 fps | 97.9% |
| Somchem S365 | 37 gr | 80% | 25,541 psi | 52% | 2142 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 40,451 psi | 82% | 2356 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,959 psi | 83% | 2362 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,489 psi | 68% | 2241 fps | 98.6% |
| Vihtavuori N160 | <<locked>> | 84% | 33,968 psi | 69% | 2293 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 39,407 psi | 80% | 2352 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 33,243 psi | 67% | 2293 fps | 95% |
| Vihtavuori N555 | <<locked>> | 92% | 31,908 psi | 65% | 2333 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,631 psi | 60% | 2172 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 96% | 29,805 psi | 60% | 2333 fps | 96.1% |
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 50 powders for 7 x 57 R loaded with the .284 | 160gr | Sierra Tipped MatchKing. Alliant Reloder-26 delivers the highest muzzle velocity at 2,602 fps; across all powders the maximum-charge window runs from 1,578 fps to 2,602 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 50 of the 50 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 69–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.284" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-26, 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. Somchem S365, ReloadSwiss RS 70, Alliant Reloder-17 rank at the top here: for 7 x 57 R with the .284 | 160gr | Sierra Tipped MatchKing 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.