Load Specifications
Load data in caliber 7 x 57 with .284 | 170gr | Sierra RN Prohunter bullet and 80 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, ReloadSwiss RS 70 and Ramshot Hunter.
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% | 48,631 psi | 86% | 2425 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 50,314 psi | 89% | 2470 fps | 97.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,542 psi | 81% | 2493 fps | 98.2% |
| Accurate 4064 | <<locked>> | 84% | 48,675 psi | 86% | 2470 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 48,080 psi | 85% | 2546 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 86% | 49,676 psi | 88% | 2497 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 98% | 49,632 psi | 88% | 2575 fps | 96.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 47,718 psi | 84% | 2592 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 49,690 psi | 88% | 2516 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 50,038 psi | 88% | 2533 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 94% | 49,516 psi | 88% | 2602 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 90% | 50,125 psi | 89% | 2628 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 48,863 psi | 86% | 2569 fps | 96.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,018 psi | 76% | 2516 fps | 99.9% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,811 psi | 67% | 2428 fps | 96.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,428 psi | 86% | 2677 fps | 99.7% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 51,097 psi | 90% | 2549 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 50,169 psi | 89% | 2530 fps | 100% |
| Bofors RP7 | <<locked>> | 90% | 50,270 psi | 89% | 2510 fps | 97.7% |
| Hodgdon H380 | <<locked>> | 86% | 50,981 psi | 90% | 2543 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 92% | 50,676 psi | 90% | 2595 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 88% | 48,066 psi | 85% | 2510 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 49,153 psi | 87% | 2533 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 48,515 psi | 86% | 2530 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 50,604 psi | 89% | 2625 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,824 psi | 63% | 1562 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 49,995 psi | 88% | 2500 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 49,124 psi | 87% | 2477 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 82% | 48,559 psi | 86% | 2454 fps | 97.9% |
| IMR 4350 | <<locked>> | 94% | 50,749 psi | 90% | 2536 fps | 97.8% |
| IMR 4451 Enduron | <<locked>> | 88% | 48,863 psi | 86% | 2487 fps | 97.8% |
| IMR 4831 | <<locked>> | 94% | 48,834 psi | 86% | 2543 fps | 99.7% |
| IMR 4895 | <<locked>> | 82% | 48,153 psi | 85% | 2510 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 50,995 psi | 90% | 2467 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 49,153 psi | 87% | 2477 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 48,385 psi | 86% | 2484 fps | 98.9% |
| Lovex S070 | <<locked>> | 92% | 49,255 psi | 87% | 2516 fps | 98.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,884 psi | 67% | 2359 fps | 96.4% |
| Norma 201 | <<locked>> | 82% | 50,749 psi | 90% | 2487 fps | 100% |
| Norma 202 | <<locked>> | 82% | 51,169 psi | 90% | 2487 fps | 100% |
| Norma 203B | <<locked>> | 84% | 49,342 psi | 87% | 2520 fps | 100% |
| Norma 204 | <<locked>> | 94% | 50,633 psi | 90% | 2575 fps | 96.6% |
| Norma MRPᴾ | <<locked>> | 100% | 47,979 psi | 85% | 2635 fps | 97.9% |
| Norma URP | <<locked>> | 94% | 50,705 psi | 90% | 2589 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 84% | 49,734 psi | 88% | 2546 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 49,298 psi | 87% | 2582 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,622 psi | 65% | 1604 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 51,155 psi | 90% | 2530 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 50,502 psi | 89% | 2592 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 49,995 psi | 88% | 2625 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 51,024 psi | 90% | 2615 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 50,459 psi | 89% | 2644 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 84% | 51,053 psi | 90% | 2487 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 50,343 psi | 89% | 2526 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 50,865 psi | 90% | 2602 fps | 97.1% |
| Rottweil R 907 | <<locked>> | 90% | 50,270 psi | 89% | 2510 fps | 97.7% |
| Shooters World Long Rifle | <<locked>> | 90% | 48,385 psi | 86% | 2484 fps | 98.9% |
| Shooters World Precision | <<locked>> | 84% | 49,153 psi | 87% | 2477 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 49,255 psi | 87% | 2516 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 48,283 psi | 85% | 2530 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 50,212 psi | 89% | 2513 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 49,081 psi | 87% | 2392 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 48,167 psi | 85% | 2438 fps | 97.8% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,372 psi | 89% | 2598 fps | 97% |
| Somchem S355 | <<locked>> | 88% | 50,604 psi | 89% | 2523 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 48,805 psi | 86% | 2589 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 48,341 psi | 85% | 2536 fps | 97.4% |
| Vihtavuori N135 | <<locked>> | 82% | 47,979 psi | 85% | 2411 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 48,457 psi | 86% | 2428 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 48,631 psi | 86% | 2461 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 49,588 psi | 88% | 2536 fps | 99.7% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 44,570 psi | 79% | 2461 fps | 96% |
| Vihtavuori N540 | <<locked>> | 84% | 49,632 psi | 88% | 2464 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 48,718 psi | 86% | 2539 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,747 psi | 84% | 2585 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 49,284 psi | 87% | 2513 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 50,995 psi | 90% | 2598 fps | 98.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,595 psi | 68% | 2546 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 50,009 psi | 88% | 2520 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 48,341 psi | 85% | 2523 fps | 96.2% |
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% | 45,498 psi | 80% | 2382 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,106 psi | 78% | 2369 fps | 96.1% |
| Accurate 3100 | <<locked>> | 92% | 34,650 psi | 61% | 2290 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 43,047 psi | 76% | 2385 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,068 psi | 57% | 2244 fps | 96.3% |
| ADI AR 2208 | <<locked>> | 80% | 41,321 psi | 73% | 2356 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 96% | 46,528 psi | 82% | 2523 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,411 psi | 79% | 2533 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,249 psi | 73% | 2379 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,324 psi | 78% | 2438 fps | 99.6% |
| Alliant Reloder-16 | 38.7 gr | 80% | 32,024 psi | 57% | 2251 fps | 96.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,781 psi | 63% | 2369 fps | 99.1% |
| Alliant Reloder-19 | <<locked>> | 96% | 45,861 psi | 81% | 2516 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 84% | 26,252 psi | 46% | 2126 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 98% | 35,563 psi | 63% | 2375 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 88% | 31,836 psi | 56% | 2333 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,008 psi | 85% | 2503 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 41,191 psi | 73% | 2385 fps | 99.8% |
| Bofors RP7 | <<locked>> | 84% | 41,814 psi | 74% | 2362 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 41,742 psi | 74% | 2388 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 84% | 38,870 psi | 69% | 2385 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 84% | 42,366 psi | 75% | 2408 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,602 psi | 52% | 2165 fps | 97.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,208 psi | 80% | 2480 fps | 100% |
| Hodgdon Superformance | <<locked>> | 86% | 40,973 psi | 72% | 2454 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,832 psi | 47% | 1398 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,920 psi | 83% | 2451 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,439 psi | 77% | 2385 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,658 psi | 81% | 2405 fps | 97.3% |
| IMR 4350 | <<locked>> | 86% | 39,450 psi | 70% | 2343 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,305 psi | 68% | 2297 fps | 95.1% |
| IMR 4831 | <<locked>> | 80% | 31,038 psi | 55% | 2205 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 45,426 psi | 80% | 2464 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 48,254 psi | 85% | 2428 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 43,540 psi | 77% | 2388 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 35,795 psi | 63% | 2251 fps | 96% |
| Lovex S070 | <<locked>> | 84% | 38,566 psi | 68% | 2326 fps | 95.7% |
| Lovex S071 | <<locked>> | 98% | 35,375 psi | 63% | 2306 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 47,616 psi | 84% | 2441 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,008 psi | 85% | 2441 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,685 psi | 77% | 2428 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 44,512 psi | 79% | 2474 fps | 95.1% |
| Norma MRP | <<locked>> | 94% | 39,276 psi | 69% | 2467 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 32,155 psi | 57% | 2241 fps | 96.1% |
| Ramshot Big Game | <<locked>> | 80% | 43,207 psi | 76% | 2441 fps | 99.6% |
| Ramshot Hunter | 43.1 gr | 84% | 35,679 psi | 63% | 2329 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,369 psi | 48% | 1434 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,901 psi | 74% | 2372 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,934 psi | 83% | 2536 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,043 psi | 67% | 2421 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,705 psi | 56% | 2257 fps | 95.7% |
| ReloadSwiss RS 70 | 43.4 gr | 82% | 33,576 psi | 59% | 2310 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 80% | 45,223 psi | 80% | 2398 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 38,725 psi | 68% | 2336 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 96% | 44,512 psi | 79% | 2497 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 84% | 41,814 psi | 74% | 2362 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,795 psi | 63% | 2251 fps | 96% |
| Shooters World Precision | <<locked>> | 80% | 43,540 psi | 77% | 2388 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 38,566 psi | 68% | 2326 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,566 psi | 70% | 2382 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,847 psi | 83% | 2461 fps | 99.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,843 psi | 72% | 2270 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 37,202 psi | 66% | 2244 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 44,092 psi | 78% | 2493 fps | 95.4% |
| Somchem S355 | <<locked>> | 80% | 39,450 psi | 70% | 2339 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 28,834 psi | 51% | 2201 fps | 98.3% |
| Somchem S385 | <<locked>> | 92% | 39,813 psi | 70% | 2385 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 45,179 psi | 80% | 2372 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,469 psi | 80% | 2382 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,463 psi | 66% | 2277 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 33,634 psi | 59% | 2244 fps | 96.6% |
| Vihtavuori N165 | <<locked>> | 98% | 41,713 psi | 74% | 2408 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 43,787 psi | 77% | 2379 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,011 psi | 58% | 2244 fps | 96.1% |
| Vihtavuori N555 | <<locked>> | 84% | 28,297 psi | 50% | 2195 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,127 psi | 59% | 2221 fps | 98.5% |
| Winchester 760 | <<locked>> | 84% | 39,117 psi | 69% | 2392 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 88% | 26,339 psi | 47% | 2201 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,673 psi | 83% | 2467 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 45,179 psi | 80% | 2474 fps | 95.3% |
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 80 powders for 7 x 57 loaded with the .284 | 170gr | Sierra RN Prohunter. Alliant Reloder-26 delivers the highest muzzle velocity at 2,677 fps; across all powders the maximum-charge window runs from 1,562 fps to 2,677 fps. Accurate 3100 gives the best case fill at 100 %, and 80 of the 80 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (390 MPa), the top charges use 63–90 %, leaving at least 10 % headroom. The 170.0 gr projectile in 0.284" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-25 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-16, ReloadSwiss RS 70, Ramshot Hunter rank at the top here: for 7 x 57 with the .284 | 170gr | Sierra RN Prohunter 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.