Load Specifications
Load data in caliber 7 x 57 with .284 | 155gr | Geco EXPRESS bullet and 87 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, ReloadSwiss RS 60 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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 86% | 50,357 psi | 89% | 2569 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 49,414 psi | 87% | 2556 fps | 96% |
| Accurate 3100ᴾ | <<locked>> | 100% | 40,625 psi | 72% | 2510 fps | 95.9% |
| Accurate 4064 | <<locked>> | 88% | 50,270 psi | 89% | 2612 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 49,516 psi | 88% | 2680 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 84% | 50,778 psi | 90% | 2635 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 88% | 48,718 psi | 86% | 2589 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 82% | 49,792 psi | 88% | 2589 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 50,415 psi | 89% | 2569 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 49,806 psi | 88% | 2736 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 48,675 psi | 86% | 2612 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 86% | 49,081 psi | 87% | 2628 fps | 99.5% |
| Alliant Reloder-16 | <<locked>> | 98% | 51,053 psi | 90% | 2736 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 92% | 48,501 psi | 86% | 2717 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,914 psi | 69% | 2536 fps | 98.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,236 psi | 76% | 2687 fps | 98% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 50,125 psi | 89% | 2644 fps | 99.3% |
| Bofors RP3 | <<locked>> | 88% | 48,602 psi | 86% | 2621 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 49,255 psi | 87% | 2592 fps | 96.3% |
| Hodgdon BL-C2 | <<locked>> | 82% | 48,733 psi | 86% | 2612 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 49,647 psi | 88% | 2631 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 94% | 49,008 psi | 87% | 2674 fps | 97% |
| Hodgdon H4895 | <<locked>> | 82% | 48,095 psi | 85% | 2595 fps | 99.8% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 50,792 psi | 90% | 2671 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 50,488 psi | 89% | 2677 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 49,226 psi | 87% | 2700 fps | 96.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,447 psi | 63% | 1627 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 49,313 psi | 87% | 2598 fps | 99.9% |
| IMR 3031 | <<locked>> | 84% | 51,126 psi | 90% | 2631 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 48,095 psi | 85% | 2569 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 84% | 48,109 psi | 85% | 2546 fps | 96.6% |
| IMR 4350 | <<locked>> | 96% | 49,211 psi | 87% | 2615 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 92% | 51,053 psi | 90% | 2625 fps | 97.2% |
| IMR 4831 | <<locked>> | 98% | 50,386 psi | 89% | 2677 fps | 99.4% |
| IMR 4895 | <<locked>> | 86% | 50,270 psi | 89% | 2657 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 82% | 49,792 psi | 88% | 2589 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 50,386 psi | 89% | 2615 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 50,618 psi | 89% | 2569 fps | 99.8% |
| Lovex S062 | <<locked>> | 88% | 51,155 psi | 90% | 2618 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 50,357 psi | 89% | 2618 fps | 98.3% |
| Lovex S070 | <<locked>> | 96% | 51,126 psi | 90% | 2651 fps | 97.5% |
| Norma 201 | <<locked>> | 84% | 49,690 psi | 88% | 2585 fps | 100% |
| Norma 202 | <<locked>> | 84% | 50,024 psi | 88% | 2589 fps | 100% |
| Norma 203B | <<locked>> | 86% | 48,327 psi | 85% | 2615 fps | 99.7% |
| Norma URP | <<locked>> | 96% | 49,008 psi | 87% | 2671 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 86% | 48,225 psi | 85% | 2635 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 98% | 50,879 psi | 90% | 2713 fps | 98.2% |
| Ramshot TAC | <<locked>> | 82% | 49,966 psi | 88% | 2605 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 82% | 49,516 psi | 88% | 2621 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,868 psi | 63% | 1663 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 50,038 psi | 88% | 2615 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 49,153 psi | 87% | 2684 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 48,443 psi | 86% | 2720 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 48,979 psi | 87% | 2700 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 49,052 psi | 87% | 2723 fps | 98.7% |
| Rottweil R 901 | <<locked>> | 82% | 50,821 psi | 90% | 2569 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 50,357 psi | 89% | 2585 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 48,805 psi | 86% | 2618 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 92% | 49,255 psi | 87% | 2592 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 94% | 50,357 psi | 89% | 2618 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 84% | 50,386 psi | 89% | 2615 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 51,155 psi | 90% | 2618 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 51,126 psi | 90% | 2651 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 50,241 psi | 89% | 2671 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 48,399 psi | 86% | 2582 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 49,342 psi | 87% | 2608 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 48,008 psi | 85% | 2487 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 48,196 psi | 85% | 2490 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 50,386 psi | 89% | 2572 fps | 97.1% |
| Somchem S335 | <<locked>> | 84% | 50,575 psi | 89% | 2530 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 51,111 psi | 90% | 2625 fps | 99.8% |
| Somchem S355 | <<locked>> | 90% | 49,284 psi | 87% | 2615 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,082 psi | 89% | 2723 fps | 100% |
| Vihtavuori N133 | <<locked>> | 82% | 48,341 psi | 85% | 2477 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 49,893 psi | 88% | 2556 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 50,473 psi | 89% | 2569 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 50,241 psi | 89% | 2595 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 48,051 psi | 85% | 2618 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 82% | 50,285 psi | 89% | 2589 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 48,834 psi | 86% | 2566 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 50,314 psi | 89% | 2671 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,525 psi | 75% | 2608 fps | 98.7% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 48,095 psi | 85% | 2598 fps | 99.9% |
| Winchester 748 | <<locked>> | 82% | 49,908 psi | 88% | 2631 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 49,342 psi | 87% | 2680 fps | 97.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,896 psi | 62% | 2539 fps | 98.6% |
| Winchester StaBALL Match | <<locked>> | 84% | 48,718 psi | 86% | 2612 fps | 99.9% |
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% | 41,379 psi | 73% | 2431 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 46,354 psi | 82% | 2503 fps | 95.3% |
| Accurate 3100 | <<locked>> | 98% | 37,855 psi | 67% | 2457 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 39,117 psi | 69% | 2428 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 32,779 psi | 58% | 2359 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 44,686 psi | 79% | 2533 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 80% | 38,159 psi | 67% | 2395 fps | 97.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,717 psi | 83% | 2539 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 47,369 psi | 84% | 2526 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,683 psi | 72% | 2566 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,739 psi | 67% | 2415 fps | 98.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,422 psi | 71% | 2474 fps | 98.2% |
| Alliant Reloder-16 | <<locked>> | 84% | 33,170 psi | 59% | 2369 fps | 95.3% |
| Alliant Reloder-17 | 41.2 gr | 80% | 32,648 psi | 58% | 2388 fps | 97% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,385 psi | 54% | 2329 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 94% | 35,230 psi | 62% | 2507 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,874 psi | 78% | 2539 fps | 98.4% |
| Bofors RP3 | <<locked>> | 80% | 37,478 psi | 66% | 2421 fps | 98.8% |
| Bofors RP7 | <<locked>> | 90% | 46,151 psi | 82% | 2539 fps | 95.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,672 psi | 81% | 2566 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 38,189 psi | 68% | 2421 fps | 96.4% |
| Hodgdon H414 | <<locked>> | 90% | 43,018 psi | 76% | 2569 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 45,107 psi | 80% | 2543 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 28,601 psi | 51% | 2228 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,205 psi | 73% | 2520 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 92% | 45,803 psi | 81% | 2641 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,397 psi | 47% | 1450 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,337 psi | 77% | 2500 fps | 99.4% |
| IMR 3031 | <<locked>> | 80% | 44,846 psi | 79% | 2536 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,030 psi | 71% | 2425 fps | 98.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,395 psi | 75% | 2444 fps | 95.1% |
| IMR 4350 | <<locked>> | 94% | 46,470 psi | 82% | 2569 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 42,554 psi | 75% | 2474 fps | 95.1% |
| IMR 4831 | <<locked>> | 86% | 33,997 psi | 60% | 2372 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 41,394 psi | 73% | 2500 fps | 98.9% |
| IMR 8208 XBR | <<locked>> | 80% | 46,717 psi | 83% | 2539 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 43,845 psi | 78% | 2513 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,904 psi | 79% | 2477 fps | 99.3% |
| Lovex S062 | <<locked>> | 80% | 40,030 psi | 71% | 2431 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 37,130 psi | 66% | 2375 fps | 95.1% |
| Lovex S070 | <<locked>> | 90% | 42,496 psi | 75% | 2500 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 43,947 psi | 78% | 2490 fps | 99.8% |
| Norma 202 | <<locked>> | 80% | 44,208 psi | 78% | 2497 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,784 psi | 70% | 2461 fps | 98.5% |
| Norma URP | <<locked>> | 84% | 33,301 psi | 59% | 2365 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 39,392 psi | 70% | 2477 fps | 98.3% |
| Ramshot Hunter | <<locked>> | 90% | 39,421 psi | 70% | 2503 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 46,673 psi | 83% | 2549 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,166 psi | 82% | 2566 fps | 99.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,876 psi | 48% | 1490 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,118 psi | 73% | 2454 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,540 psi | 75% | 2572 fps | 98.6% |
| ReloadSwiss RS 60 | 41.2 gr | 80% | 34,751 psi | 61% | 2451 fps | 99.6% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 34,853 psi | 62% | 2428 fps | 95.5% |
| ReloadSwiss RS 70 | 46 gr | 88% | 37,463 psi | 66% | 2490 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 47,950 psi | 85% | 2526 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,742 psi | 74% | 2444 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 35,172 psi | 62% | 2365 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 90% | 46,151 psi | 82% | 2539 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 84% | 37,130 psi | 66% | 2375 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,845 psi | 78% | 2513 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,030 psi | 71% | 2431 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 90% | 42,496 psi | 75% | 2500 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,056 psi | 64% | 2411 fps | 97.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,049 psi | 80% | 2526 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,192 psi | 76% | 2503 fps | 99.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,237 psi | 80% | 2444 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,652 psi | 67% | 2320 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 41,597 psi | 74% | 2425 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 44,860 psi | 79% | 2444 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,657 psi | 79% | 2520 fps | 99.2% |
| Somchem S355 | <<locked>> | 80% | 36,071 psi | 64% | 2372 fps | 98.1% |
| Somchem S365 | <<locked>> | 80% | 26,121 psi | 46% | 2208 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 45,585 psi | 81% | 2438 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,263 psi | 73% | 2425 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,829 psi | 74% | 2434 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,214 psi | 60% | 2313 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 84% | 34,664 psi | 61% | 2365 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 47,065 psi | 83% | 2539 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 40,321 psi | 71% | 2425 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 34,142 psi | 60% | 2365 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 90% | 30,748 psi | 54% | 2352 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,298 psi | 54% | 2241 fps | 96.2% |
| Winchester 748 | <<locked>> | 80% | 46,731 psi | 83% | 2582 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 43,018 psi | 76% | 2569 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 94% | 28,703 psi | 51% | 2349 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,801 psi | 76% | 2510 fps | 99.4% |
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 87 powders for 7 x 57 loaded with the .284 | 155gr | Geco EXPRESS. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,736 fps; across all powders the maximum-charge window runs from 1,627 fps to 2,736 fps. Accurate 3100 gives the best case fill at 100 %, and 87 of the 87 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (390 MPa), the top charges use 62–90 %, leaving at least 10 % headroom. The 155.0 gr projectile in 0.284" calls for a 1:11.0 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 70, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for 7 x 57 with the .284 | 155gr | Geco EXPRESS 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.