Load Specifications
Load data in caliber 7 x 57 R with .284 | 168gr | Sierra MatchKing bullet and 46 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Somchem S365 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 3100ᴾ | <<locked>> | 100% | 42,873 psi | 87% | 2448 fps | 97.4% |
| Accurate 4064 | <<locked>> | 82% | 43,845 psi | 89% | 2398 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 42,438 psi | 86% | 2454 fps | 98.7% |
| ADI AR 2208 | <<locked>> | 82% | 42,308 psi | 86% | 2372 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 42,148 psi | 85% | 2392 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 92% | 44,324 psi | 90% | 2510 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 88% | 44,483 psi | 90% | 2536 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 40,930 psi | 83% | 2477 fps | 99.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 42,380 psi | 86% | 2569 fps | 98.6% |
| Bofors RP3 | <<locked>> | 82% | 41,814 psi | 85% | 2395 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 82% | 42,801 psi | 87% | 2405 fps | 98.3% |
| Hodgdon H414 | <<locked>> | 88% | 42,366 psi | 86% | 2451 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 43,961 psi | 89% | 2454 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,839 psi | 73% | 1555 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 44,483 psi | 90% | 2402 fps | 99.4% |
| IMR 4451 Enduron | <<locked>> | 86% | 44,092 psi | 89% | 2402 fps | 96.4% |
| IMR 4831 | <<locked>> | 92% | 43,555 psi | 88% | 2457 fps | 99% |
| Lovex S062 | <<locked>> | 82% | 44,208 psi | 90% | 2398 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 43,888 psi | 89% | 2405 fps | 97.8% |
| Lovex S070 | <<locked>> | 90% | 44,469 psi | 90% | 2434 fps | 96.9% |
| Norma 203B | <<locked>> | 82% | 44,425 psi | 90% | 2438 fps | 99.7% |
| Norma MRP | <<locked>> | 98% | 42,714 psi | 87% | 2533 fps | 96.1% |
| Norma URP | <<locked>> | 90% | 42,482 psi | 86% | 2451 fps | 98.7% |
| Ramshot Big Game | <<locked>> | 82% | 44,295 psi | 90% | 2457 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 92% | 43,961 psi | 89% | 2490 fps | 97.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,347 psi | 74% | 1591 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 43,018 psi | 87% | 2388 fps | 96.9% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 44,295 psi | 90% | 2536 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 42,206 psi | 86% | 2474 fps | 98.5% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 41,785 psi | 85% | 2484 fps | 98% |
| Rottweil R 903 | <<locked>> | 84% | 41,974 psi | 85% | 2395 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 88% | 43,888 psi | 89% | 2405 fps | 97.8% |
| Shooters World Precision | <<locked>> | 82% | 44,208 psi | 90% | 2398 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 44,469 psi | 90% | 2434 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 43,236 psi | 88% | 2444 fps | 99.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 44,440 psi | 90% | 2326 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 43,410 psi | 88% | 2356 fps | 96.4% |
| Somchem S355 | <<locked>> | 84% | 42,728 psi | 87% | 2398 fps | 99.7% |
| Somchem S365 | <<locked>> | 94% | 43,323 psi | 88% | 2507 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 43,569 psi | 88% | 2382 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 44,208 psi | 90% | 2448 fps | 98.9% |
| Vihtavuori N550 | <<locked>> | 90% | 43,627 psi | 88% | 2454 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 98% | 42,134 psi | 85% | 2493 fps | 99.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 44,034 psi | 89% | 2428 fps | 99.9% |
| Winchester 760 | <<locked>> | 88% | 42,366 psi | 86% | 2451 fps | 96.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,405 psi | 74% | 2490 fps | 99.7% |
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% | 37,449 psi | 76% | 2349 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 40,944 psi | 83% | 2349 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 30,284 psi | 61% | 2201 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 39,581 psi | 80% | 2320 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,407 psi | 80% | 2343 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,763 psi | 62% | 2215 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 34,040 psi | 69% | 2326 fps | 98.4% |
| Alliant Reloder-23 | <<locked>> | 88% | 28,369 psi | 58% | 2185 fps | 95.9% |
| Alliant Reloder-26 | 46.1 gr | 90% | 32,227 psi | 65% | 2336 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 39,320 psi | 80% | 2352 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 80% | 39,987 psi | 81% | 2356 fps | 97.7% |
| Hodgdon H414 | <<locked>> | 86% | 39,610 psi | 80% | 2398 fps | 95.4% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 28,152 psi | 57% | 2123 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,774 psi | 54% | 1388 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,582 psi | 84% | 2349 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 84% | 41,626 psi | 84% | 2356 fps | 95.8% |
| IMR 4831 | <<locked>> | 82% | 31,531 psi | 64% | 2218 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 41,626 psi | 84% | 2352 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 34,229 psi | 69% | 2211 fps | 95% |
| Lovex S070 | <<locked>> | 86% | 39,233 psi | 80% | 2336 fps | 95.5% |
| Norma 203B | <<locked>> | 80% | 41,800 psi | 85% | 2395 fps | 99.4% |
| Norma MRP | <<locked>> | 96% | 39,972 psi | 81% | 2477 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 30,574 psi | 62% | 2201 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 41,176 psi | 84% | 2405 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 86% | 36,390 psi | 74% | 2339 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,050 psi | 55% | 1421 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 40,321 psi | 82% | 2339 fps | 96.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 36,230 psi | 73% | 2382 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 32,111 psi | 65% | 2267 fps | 95.5% |
| ReloadSwiss RS 70 | 42.7 gr | 84% | 34,301 psi | 70% | 2323 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 36,840 psi | 75% | 2297 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 34,229 psi | 69% | 2211 fps | 95% |
| Shooters World Precision | <<locked>> | 80% | 41,626 psi | 84% | 2352 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 39,233 psi | 80% | 2336 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 37,826 psi | 77% | 2346 fps | 98.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,262 psi | 80% | 2241 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 40,611 psi | 82% | 2306 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 37,623 psi | 76% | 2303 fps | 99% |
| Somchem S365 | 37.9 gr | 80% | 27,398 psi | 56% | 2159 fps | 97.4% |
| Vihtavuori N150 | <<locked>> | 80% | 35,737 psi | 72% | 2244 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 80% | 32,024 psi | 65% | 2208 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 31,459 psi | 64% | 2208 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 86% | 28,529 psi | 58% | 2201 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,720 psi | 64% | 2185 fps | 97.7% |
| Winchester 760 | <<locked>> | 86% | 39,610 psi | 80% | 2398 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 90% | 26,556 psi | 54% | 2198 fps | 95.2% |
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 46 powders for 7 x 57 R loaded with the .284 | 168gr | Sierra MatchKing. Alliant Reloder-26 delivers the highest muzzle velocity at 2,569 fps; across all powders the maximum-charge window runs from 1,555 fps to 2,569 fps. Accurate 3100 gives the best case fill at 100 %, and 46 of the 46 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 73–90 %, leaving at least 10 % headroom. The 168.0 gr projectile in 0.284" calls for a 1:10.5 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, Somchem S365, ReloadSwiss RS 70 rank at the top here: for 7 x 57 R with the .284 | 168gr | Sierra 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.