Load Specifications
Load data in caliber 7 x 57 R with .284 | 150gr | Berger Classic Hybrid Hunter bullet and 47 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, ReloadSwiss RS 70 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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Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 42,989 psi | 87% | 2500 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 43,366 psi | 88% | 2543 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 41,930 psi | 85% | 2589 fps | 97.7% |
| ADI AR 2208 | <<locked>> | 84% | 42,337 psi | 86% | 2513 fps | 98.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 42,540 psi | 86% | 2638 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 41,858 psi | 85% | 2533 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 82% | 42,235 psi | 86% | 2543 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 94% | 44,208 psi | 90% | 2651 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 90% | 44,411 psi | 90% | 2680 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,043 psi | 77% | 2552 fps | 98.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,148 psi | 85% | 2697 fps | 97.3% |
| Bofors RP3 | <<locked>> | 86% | 44,454 psi | 90% | 2589 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 84% | 42,656 psi | 87% | 2546 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 43,352 psi | 88% | 2589 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 43,033 psi | 87% | 2592 fps | 99.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,331 psi | 72% | 1650 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 44,498 psi | 90% | 2546 fps | 98.8% |
| IMR 4831 | <<locked>> | 94% | 43,033 psi | 87% | 2592 fps | 98% |
| IMR 4895 | <<locked>> | 82% | 43,250 psi | 88% | 2575 fps | 99% |
| Lovex S062 | <<locked>> | 84% | 44,396 psi | 90% | 2549 fps | 99.7% |
| Lovex S065 | <<locked>> | 90% | 43,743 psi | 89% | 2539 fps | 96.7% |
| Norma 203B | <<locked>> | 84% | 44,382 psi | 90% | 2585 fps | 99.1% |
| Norma URP | <<locked>> | 92% | 41,872 psi | 85% | 2585 fps | 97.6% |
| Ramshot Big Game | <<locked>> | 84% | 44,164 psi | 90% | 2602 fps | 99% |
| Ramshot Hunter | <<locked>> | 94% | 43,758 psi | 89% | 2625 fps | 96.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,752 psi | 73% | 1690 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 44,512 psi | 90% | 2644 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 44,367 psi | 90% | 2687 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 44,599 psi | 90% | 2661 fps | 98% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 41,930 psi | 85% | 2621 fps | 96.7% |
| Rottweil R 902 | <<locked>> | 82% | 43,656 psi | 89% | 2516 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 86% | 41,756 psi | 85% | 2536 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 90% | 43,743 psi | 89% | 2539 fps | 96.7% |
| Shooters World Precision | <<locked>> | 84% | 44,396 psi | 90% | 2549 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 43,120 psi | 87% | 2589 fps | 98.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 44,541 psi | 90% | 2474 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 42,685 psi | 87% | 2543 fps | 99.1% |
| Somchem S365 | <<locked>> | 96% | 42,685 psi | 87% | 2641 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 82% | 42,975 psi | 87% | 2493 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 43,772 psi | 89% | 2507 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 43,381 psi | 88% | 2526 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 92% | 43,932 psi | 89% | 2585 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 82% | 42,119 psi | 85% | 2497 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 43,221 psi | 88% | 2589 fps | 97.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,321 psi | 84% | 2625 fps | 98.2% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 44,193 psi | 90% | 2569 fps | 99.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,852 psi | 69% | 2539 fps | 97.8% |
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% | 40,451 psi | 82% | 2454 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 38,247 psi | 78% | 2451 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 34,229 psi | 69% | 2428 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 37,405 psi | 76% | 2411 fps | 97% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 39,856 psi | 81% | 2582 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 36,927 psi | 75% | 2434 fps | 98.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,552 psi | 80% | 2490 fps | 97.7% |
| Alliant Reloder-16 | <<locked>> | 86% | 34,693 psi | 70% | 2441 fps | 95.5% |
| Alliant Reloder-17 | 41.2 gr | 80% | 31,937 psi | 65% | 2402 fps | 96.3% |
| Alliant Reloder-23 | <<locked>> | 94% | 31,618 psi | 64% | 2395 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 96% | 36,680 psi | 74% | 2572 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 36,579 psi | 74% | 2438 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 80% | 37,405 psi | 76% | 2438 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 29,892 psi | 61% | 2293 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,263 psi | 82% | 2539 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,310 psi | 53% | 1473 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,262 psi | 80% | 2444 fps | 97.7% |
| IMR 4831 | <<locked>> | 86% | 33,156 psi | 67% | 2385 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 40,524 psi | 82% | 2520 fps | 98.5% |
| Lovex S062 | <<locked>> | 80% | 39,218 psi | 80% | 2451 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 38,798 psi | 79% | 2444 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 38,943 psi | 79% | 2480 fps | 98.1% |
| Norma URP | <<locked>> | 86% | 34,548 psi | 70% | 2428 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 38,508 psi | 78% | 2493 fps | 97.8% |
| Ramshot Hunter | <<locked>> | 92% | 41,089 psi | 83% | 2572 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,774 psi | 54% | 1512 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,524 psi | 84% | 2589 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 33,968 psi | 69% | 2464 fps | 99.2% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 36,303 psi | 74% | 2497 fps | 95.7% |
| ReloadSwiss RS 70 | 47 gr | 90% | 39,102 psi | 79% | 2559 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 40,901 psi | 83% | 2464 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 34,330 psi | 70% | 2382 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 38,798 psi | 79% | 2444 fps | 95.3% |
| Shooters World Precision | <<locked>> | 80% | 39,218 psi | 80% | 2451 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,230 psi | 71% | 2428 fps | 96.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 36,898 psi | 75% | 2339 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 35,288 psi | 72% | 2388 fps | 97.6% |
| Somchem S365 | 40 gr | 82% | 27,253 psi | 55% | 2274 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 40,408 psi | 82% | 2451 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 40,959 psi | 83% | 2457 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,489 psi | 68% | 2329 fps | 98.3% |
| Vihtavuori N160 | <<locked>> | 86% | 36,230 psi | 73% | 2431 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 39,479 psi | 80% | 2448 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 35,592 psi | 72% | 2434 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 92% | 31,792 psi | 64% | 2415 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,718 psi | 60% | 2254 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 96% | 29,849 psi | 61% | 2411 fps | 95.4% |
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 47 powders for 7 x 57 R loaded with the .284 | 150gr | Berger Classic Hybrid Hunter. Alliant Reloder-26 delivers the highest muzzle velocity at 2,697 fps; across all powders the maximum-charge window runs from 1,650 fps to 2,697 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 47 of the 47 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 69–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.284" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-26, 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. Somchem S365, ReloadSwiss RS 70, Alliant Reloder-17 rank at the top here: for 7 x 57 R with the .284 | 150gr | Berger Classic Hybrid Hunter 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.