Load Specifications
Load data in caliber 7 x 57 R with .284 | 140gr | Alaska Bullet Works Kodiak SP SPBC bullet and 50 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 ReloadSwiss RS 62.
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% | 44,222 psi | 90% | 2615 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 44,454 psi | 90% | 2654 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 42,946 psi | 87% | 2697 fps | 97.3% |
| ADI AR 2208 | <<locked>> | 86% | 43,642 psi | 89% | 2625 fps | 97.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 44,106 psi | 89% | 2759 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 42,975 psi | 87% | 2641 fps | 99% |
| Alliant Reloder-15 | <<locked>> | 84% | 43,439 psi | 88% | 2657 fps | 98% |
| Alliant Reloder-16 | <<locked>> | 94% | 42,670 psi | 87% | 2703 fps | 97.4% |
| Alliant Reloder-17 | <<locked>> | 90% | 42,670 psi | 87% | 2736 fps | 98.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,448 psi | 74% | 2595 fps | 97.1% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 44,338 psi | 90% | 2671 fps | 97.7% |
| Bofors RP3 | <<locked>> | 86% | 42,859 psi | 87% | 2651 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 86% | 44,005 psi | 89% | 2657 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 44,469 psi | 90% | 2697 fps | 99% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 44,309 psi | 90% | 2707 fps | 99.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,346 psi | 72% | 1716 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 43,859 psi | 89% | 2635 fps | 98.9% |
| IMR 4064 | <<locked>> | 84% | 43,018 psi | 87% | 2605 fps | 98% |
| IMR 4831 | <<locked>> | 96% | 44,034 psi | 89% | 2697 fps | 97.6% |
| IMR 4895 | <<locked>> | 84% | 44,469 psi | 90% | 2687 fps | 98.7% |
| Lovex D073.6 | <<locked>> | 82% | 44,295 psi | 90% | 2654 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 42,873 psi | 87% | 2612 fps | 99.3% |
| Norma 201 | <<locked>> | 82% | 44,222 psi | 90% | 2625 fps | 99.4% |
| Norma 202 | <<locked>> | 82% | 44,440 psi | 90% | 2631 fps | 100% |
| Norma 203B | <<locked>> | 84% | 42,757 psi | 87% | 2644 fps | 98.3% |
| Norma URP | <<locked>> | 94% | 42,960 psi | 87% | 2694 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 84% | 42,554 psi | 86% | 2661 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,679 psi | 72% | 1755 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 42,815 psi | 87% | 2707 fps | 97.9% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 42,699 psi | 87% | 2746 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 42,743 psi | 87% | 2717 fps | 96.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 43,163 psi | 88% | 2726 fps | 96.2% |
| Rottweil R 902 | <<locked>> | 82% | 42,018 psi | 85% | 2572 fps | 99.1% |
| Rottweil R 903 | <<locked>> | 88% | 42,757 psi | 87% | 2644 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 44,295 psi | 90% | 2654 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 42,873 psi | 87% | 2612 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 44,353 psi | 90% | 2703 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 43,816 psi | 89% | 2641 fps | 98.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 43,105 psi | 87% | 2539 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 43,801 psi | 89% | 2651 fps | 98.9% |
| Somchem S365 | <<locked>> | 98% | 43,845 psi | 89% | 2753 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 84% | 44,048 psi | 89% | 2605 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 42,235 psi | 86% | 2569 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 44,469 psi | 90% | 2635 fps | 99.7% |
| Vihtavuori N160 | <<locked>> | 92% | 42,206 psi | 86% | 2641 fps | 96.9% |
| Vihtavuori N540 | <<locked>> | 84% | 43,279 psi | 88% | 2608 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 44,222 psi | 90% | 2694 fps | 97.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,233 psi | 80% | 2671 fps | 97% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 42,496 psi | 86% | 2625 fps | 98.8% |
| Winchester StaBALL Match | <<locked>> | 82% | 43,004 psi | 87% | 2641 fps | 98.8% |
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% | 38,624 psi | 78% | 2516 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 36,550 psi | 74% | 2503 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 37,376 psi | 76% | 2582 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 36,013 psi | 73% | 2464 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 38,363 psi | 78% | 2631 fps | 96.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,650 psi | 72% | 2490 fps | 97.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,203 psi | 77% | 2549 fps | 96.7% |
| Alliant Reloder-16 | <<locked>> | 90% | 37,666 psi | 76% | 2592 fps | 95.8% |
| Alliant Reloder-17 | 43 gr | 82% | 32,706 psi | 66% | 2497 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 96% | 32,358 psi | 66% | 2487 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,611 psi | 84% | 2618 fps | 97% |
| Bofors RP3 | <<locked>> | 80% | 35,157 psi | 71% | 2490 fps | 97.4% |
| Hodgdon H380 | <<locked>> | 82% | 38,464 psi | 78% | 2546 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 32,532 psi | 66% | 2438 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,667 psi | 78% | 2595 fps | 98.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,237 psi | 53% | 1532 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,162 psi | 83% | 2582 fps | 98.4% |
| IMR 4064 | <<locked>> | 80% | 37,797 psi | 77% | 2500 fps | 96.7% |
| IMR 4831 | <<locked>> | 90% | 36,114 psi | 73% | 2536 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 39,131 psi | 79% | 2579 fps | 97.6% |
| Lovex D073.6 | <<locked>> | 80% | 41,220 psi | 84% | 2598 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 37,695 psi | 76% | 2507 fps | 98.3% |
| Norma 201 | <<locked>> | 80% | 41,495 psi | 84% | 2569 fps | 99% |
| Norma 202 | <<locked>> | 80% | 41,901 psi | 85% | 2585 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,594 psi | 76% | 2536 fps | 97.1% |
| Norma URP | <<locked>> | 90% | 37,710 psi | 76% | 2582 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 36,956 psi | 75% | 2546 fps | 96.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,382 psi | 54% | 1565 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,755 psi | 81% | 2644 fps | 97.1% |
| ReloadSwiss RS 60 | 42 gr | 80% | 32,706 psi | 66% | 2510 fps | 98.2% |
| ReloadSwiss RS 62 | 47.2 gr | 90% | 37,318 psi | 76% | 2602 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 40,277 psi | 82% | 2664 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 39,639 psi | 80% | 2526 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 80% | 33,025 psi | 67% | 2434 fps | 96.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,220 psi | 84% | 2598 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 37,695 psi | 76% | 2507 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,939 psi | 69% | 2480 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,901 psi | 83% | 2585 fps | 97.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,578 psi | 72% | 2398 fps | 99.9% |
| Somchem S355 | <<locked>> | 80% | 33,823 psi | 69% | 2438 fps | 96.4% |
| Somchem S365 | <<locked>> | 84% | 27,891 psi | 57% | 2369 fps | 95.1% |
| Vihtavuori N135 | <<locked>> | 80% | 38,769 psi | 79% | 2513 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,610 psi | 80% | 2520 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 32,271 psi | 65% | 2382 fps | 97.3% |
| Vihtavuori N160 | <<locked>> | 88% | 37,072 psi | 75% | 2533 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 38,101 psi | 77% | 2507 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 90% | 38,899 psi | 79% | 2589 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 96% | 34,592 psi | 70% | 2566 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 32,706 psi | 66% | 2405 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,321 psi | 82% | 2589 fps | 98.3% |
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 76 powders for 7 x 57 R loaded with the .284 | 140gr | Alaska Bullet Works Kodiak SP SPBC. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,759 fps; across all powders the maximum-charge window runs from 1,716 fps to 2,759 fps. Accurate 3100 gives the best case fill at 100 %, and 76 of the 76 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 66–90 %, leaving at least 10 % headroom. The 140.0 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-26 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, ReloadSwiss RS 62 rank at the top here: for 7 x 57 R with the .284 | 140gr | Alaska Bullet Works Kodiak SP SPBC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Accurate 3100, Alliant Reloder-19 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.