Load Specifications
Load data in caliber 7 x 57 R with .284 | 140gr | NorthFork Bonded Core bullet and 55 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Reloder-17 and Alliant Reloder-16.
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>> | 84% | 42,757 psi | 87% | 2582 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 43,105 psi | 87% | 2625 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 44,599 psi | 90% | 2720 fps | 97.5% |
| ADI AR 2206H | <<locked>> | 82% | 44,237 psi | 90% | 2641 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 86% | 42,511 psi | 86% | 2592 fps | 97.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 42,830 psi | 87% | 2720 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 41,814 psi | 85% | 2612 fps | 98.7% |
| Alliant Reloder-15 | <<locked>> | 84% | 42,250 psi | 86% | 2625 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 96% | 44,295 psi | 90% | 2726 fps | 97.6% |
| Alliant Reloder-17 | <<locked>> | 92% | 44,295 psi | 90% | 2756 fps | 99% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,476 psi | 72% | 2559 fps | 96.4% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 43,250 psi | 88% | 2641 fps | 97.3% |
| Bofors RP3 | <<locked>> | 88% | 44,280 psi | 90% | 2671 fps | 99.2% |
| Hodgdon H380 | <<locked>> | 86% | 42,627 psi | 86% | 2621 fps | 96.4% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 43,236 psi | 88% | 2664 fps | 98.7% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 43,163 psi | 88% | 2677 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,027 psi | 71% | 1699 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 42,714 psi | 87% | 2602 fps | 98.5% |
| IMR 3031 | <<locked>> | 82% | 43,830 psi | 89% | 2651 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 41,843 psi | 85% | 2572 fps | 97.6% |
| IMR 4831 | <<locked>> | 96% | 42,714 psi | 87% | 2664 fps | 97.1% |
| IMR 4895 | <<locked>> | 84% | 43,294 psi | 88% | 2654 fps | 98.4% |
| Lovex D073.6 | <<locked>> | 82% | 43,047 psi | 87% | 2621 fps | 99.9% |
| Lovex S060 | <<locked>> | 82% | 44,512 psi | 90% | 2582 fps | 98.5% |
| Lovex S062 | <<locked>> | 86% | 44,440 psi | 90% | 2631 fps | 99.4% |
| Norma 201 | <<locked>> | 82% | 43,294 psi | 88% | 2595 fps | 99.2% |
| Norma 202 | <<locked>> | 82% | 43,424 psi | 88% | 2605 fps | 100% |
| Norma 203B | <<locked>> | 86% | 44,396 psi | 90% | 2667 fps | 98.5% |
| Norma URP | <<locked>> | 96% | 44,570 psi | 90% | 2713 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 86% | 43,976 psi | 89% | 2680 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,375 psi | 72% | 1739 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 44,512 psi | 90% | 2730 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 44,266 psi | 90% | 2769 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 44,135 psi | 90% | 2733 fps | 97.1% |
| Rottweil R 902 | <<locked>> | 84% | 43,816 psi | 89% | 2598 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 90% | 44,469 psi | 90% | 2667 fps | 99% |
| Shooters World Match Rifle | <<locked>> | 82% | 43,047 psi | 87% | 2621 fps | 99.9% |
| Shooters World Precision | <<locked>> | 86% | 44,440 psi | 90% | 2631 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 42,989 psi | 87% | 2667 fps | 98.2% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 44,498 psi | 90% | 2628 fps | 96.7% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 42,699 psi | 87% | 2612 fps | 98.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 44,541 psi | 90% | 2556 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 44,338 psi | 90% | 2559 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 44,092 psi | 89% | 2625 fps | 98.3% |
| Somchem S355 | <<locked>> | 88% | 42,366 psi | 86% | 2615 fps | 98.5% |
| Somchem S365 | <<locked>> | 98% | 42,351 psi | 86% | 2717 fps | 99.5% |
| Vihtavuori N135 | <<locked>> | 84% | 42,946 psi | 87% | 2582 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 43,845 psi | 89% | 2592 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 43,381 psi | 88% | 2605 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 94% | 43,758 psi | 89% | 2661 fps | 97.1% |
| Vihtavuori N540 | <<locked>> | 84% | 42,148 psi | 85% | 2579 fps | 99.9% |
| Vihtavuori N550 | <<locked>> | 94% | 42,975 psi | 87% | 2664 fps | 96.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,043 psi | 77% | 2638 fps | 96.5% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 44,309 psi | 90% | 2644 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 82% | 41,858 psi | 85% | 2612 fps | 98.5% |
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% | 37,550 psi | 76% | 2487 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 35,505 psi | 72% | 2474 fps | 99.6% |
| Accurate 4350 | <<locked>> | 90% | 36,260 psi | 74% | 2549 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 41,481 psi | 84% | 2589 fps | 97.9% |
| ADI AR 2208 | <<locked>> | 80% | 35,172 psi | 71% | 2434 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 37,347 psi | 76% | 2595 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,476 psi | 70% | 2457 fps | 96.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,260 psi | 76% | 2520 fps | 96.2% |
| Alliant Reloder-16 | 42.7 gr | 90% | 36,738 psi | 75% | 2559 fps | 95.1% |
| Alliant Reloder-17 | 41.9 gr | 82% | 31,850 psi | 65% | 2464 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 98% | 33,301 psi | 68% | 2503 fps | 95.5% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,277 psi | 82% | 2582 fps | 96.5% |
| Bofors RP3 | <<locked>> | 80% | 33,982 psi | 69% | 2457 fps | 96.9% |
| Hodgdon H380 | <<locked>> | 84% | 39,929 psi | 81% | 2566 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 31,647 psi | 64% | 2408 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,579 psi | 76% | 2562 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,005 psi | 53% | 1516 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,263 psi | 82% | 2556 fps | 98% |
| IMR 3031 | <<locked>> | 80% | 41,118 psi | 83% | 2602 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,883 psi | 75% | 2470 fps | 96.2% |
| IMR 4831 | <<locked>> | 92% | 37,304 psi | 76% | 2556 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 38,159 psi | 77% | 2549 fps | 97.1% |
| Lovex D073.6 | <<locked>> | 80% | 40,234 psi | 82% | 2569 fps | 99.6% |
| Lovex S060 | <<locked>> | 80% | 41,742 psi | 85% | 2530 fps | 98% |
| Lovex S062 | <<locked>> | 80% | 36,724 psi | 74% | 2477 fps | 98% |
| Norma 201 | <<locked>> | 80% | 40,509 psi | 82% | 2543 fps | 98.8% |
| Norma 202 | <<locked>> | 80% | 40,611 psi | 82% | 2552 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 36,651 psi | 74% | 2510 fps | 96.7% |
| Norma URP | <<locked>> | 90% | 36,709 psi | 74% | 2552 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 35,955 psi | 73% | 2513 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,397 psi | 54% | 1555 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,493 psi | 78% | 2612 fps | 96.6% |
| ReloadSwiss RS 60 | 40.9 gr | 80% | 31,792 psi | 64% | 2477 fps | 97.7% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 38,653 psi | 78% | 2621 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 38,667 psi | 78% | 2497 fps | 98.4% |
| Rottweil R 903 | <<locked>> | 80% | 32,097 psi | 65% | 2405 fps | 95.9% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,234 psi | 82% | 2569 fps | 99.6% |
| Shooters World Precision | <<locked>> | 80% | 36,724 psi | 74% | 2477 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,924 psi | 67% | 2444 fps | 95% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,379 psi | 84% | 2569 fps | 95.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,769 psi | 81% | 2552 fps | 97.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,925 psi | 71% | 2379 fps | 99.7% |
| Somchem S335 | <<locked>> | 80% | 41,568 psi | 84% | 2510 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,046 psi | 83% | 2566 fps | 97.7% |
| Somchem S355 | <<locked>> | 80% | 32,938 psi | 67% | 2408 fps | 95.9% |
| Somchem S365 | <<locked>> | 86% | 28,877 psi | 59% | 2392 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 37,913 psi | 77% | 2490 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,653 psi | 78% | 2493 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 31,386 psi | 64% | 2352 fps | 96.9% |
| Vihtavuori N160 | <<locked>> | 90% | 38,566 psi | 78% | 2556 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 37,028 psi | 75% | 2480 fps | 99.5% |
| Vihtavuori N550 | <<locked>> | 90% | 37,710 psi | 76% | 2556 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 98% | 35,520 psi | 72% | 2579 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 31,792 psi | 64% | 2372 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,204 psi | 80% | 2556 fps | 97.9% |
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 55 powders for 7 x 57 R loaded with the .284 | 140gr | NorthFork Bonded Core. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,769 fps; across all powders the maximum-charge window runs from 1,699 fps to 2,769 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 55 of the 55 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 71–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Hodgdon TrailBoss, ReloadSwiss RS 14 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. ReloadSwiss RS 60, Alliant Reloder-17, Alliant Reloder-16 rank at the top here: for 7 x 57 R with the .284 | 140gr | NorthFork Bonded Core 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.