Load Specifications
Load data in caliber 7 x 57 R with .284 | 160gr | Speer TBBC bullet and 49 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, 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>> | 82% | 43,903 psi | 89% | 2418 fps | 100% |
| Accurate 3100ᴾ | <<locked>> | 100% | 40,016 psi | 81% | 2448 fps | 95.9% |
| Accurate 4064 | <<locked>> | 84% | 44,077 psi | 89% | 2461 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 42,598 psi | 86% | 2510 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 84% | 42,888 psi | 87% | 2431 fps | 98.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 43,134 psi | 87% | 2559 fps | 98.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 42,525 psi | 86% | 2454 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 82% | 42,873 psi | 87% | 2464 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 92% | 42,163 psi | 86% | 2520 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 88% | 42,206 psi | 86% | 2546 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,566 psi | 78% | 2477 fps | 98.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,989 psi | 87% | 2625 fps | 98.1% |
| Bofors RP3 | <<locked>> | 84% | 42,380 psi | 86% | 2461 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 84% | 43,207 psi | 88% | 2464 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 44,324 psi | 90% | 2513 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 43,613 psi | 88% | 2510 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,476 psi | 72% | 1585 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 42,409 psi | 86% | 2415 fps | 98.8% |
| IMR 4831 | <<locked>> | 94% | 43,758 psi | 89% | 2516 fps | 98.5% |
| IMR 4895 | <<locked>> | 82% | 43,932 psi | 89% | 2493 fps | 99.3% |
| Lovex S062 | <<locked>> | 82% | 42,366 psi | 86% | 2421 fps | 99.7% |
| Lovex S065 | <<locked>> | 90% | 44,396 psi | 90% | 2464 fps | 97.3% |
| Norma 203B | <<locked>> | 82% | 42,206 psi | 86% | 2454 fps | 99.1% |
| Norma URP | <<locked>> | 92% | 42,743 psi | 87% | 2510 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 82% | 41,727 psi | 85% | 2467 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 94% | 44,338 psi | 90% | 2546 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,940 psi | 73% | 1621 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 43,816 psi | 89% | 2451 fps | 96.4% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 42,061 psi | 85% | 2552 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 42,322 psi | 86% | 2530 fps | 97.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 42,511 psi | 86% | 2546 fps | 97.4% |
| Rottweil R 902 | <<locked>> | 82% | 44,135 psi | 90% | 2431 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 86% | 42,583 psi | 86% | 2457 fps | 99.5% |
| Shooters World Long Rifle | <<locked>> | 90% | 44,396 psi | 90% | 2464 fps | 97.3% |
| Shooters World Precision | <<locked>> | 82% | 42,366 psi | 86% | 2421 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 43,598 psi | 88% | 2507 fps | 99.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 42,366 psi | 86% | 2346 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 44,019 psi | 89% | 2415 fps | 95.8% |
| Somchem S355 | <<locked>> | 86% | 43,105 psi | 87% | 2457 fps | 99.4% |
| Somchem S365 | <<locked>> | 96% | 43,497 psi | 88% | 2562 fps | 100% |
| Vihtavuori N135 | <<locked>> | 82% | 43,685 psi | 89% | 2411 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 44,324 psi | 90% | 2421 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 44,034 psi | 89% | 2444 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 44,556 psi | 90% | 2507 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 82% | 42,815 psi | 87% | 2415 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 43,961 psi | 89% | 2513 fps | 98.2% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 42,090 psi | 85% | 2549 fps | 98.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 44,512 psi | 90% | 2487 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,563 psi | 70% | 2480 fps | 98.7% |
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% | 41,205 psi | 84% | 2375 fps | 100% |
| Accurate 3100 | <<locked>> | 98% | 37,463 psi | 76% | 2398 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 38,943 psi | 79% | 2372 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 32,605 psi | 66% | 2306 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 38,000 psi | 77% | 2339 fps | 97.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,306 psi | 82% | 2503 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,637 psi | 76% | 2359 fps | 98.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,335 psi | 82% | 2418 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 84% | 32,967 psi | 67% | 2316 fps | 95.4% |
| Alliant Reloder-17 | 39.6 gr | 80% | 32,271 psi | 65% | 2326 fps | 97% |
| Alliant Reloder-23 | <<locked>> | 90% | 28,514 psi | 58% | 2231 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 94% | 34,809 psi | 71% | 2444 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 37,144 psi | 75% | 2362 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 80% | 37,942 psi | 77% | 2365 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 28,543 psi | 58% | 2178 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,031 psi | 83% | 2461 fps | 99.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,382 psi | 54% | 1411 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,885 psi | 81% | 2369 fps | 98.3% |
| IMR 4831 | <<locked>> | 84% | 31,604 psi | 64% | 2267 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 41,321 psi | 84% | 2444 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 39,610 psi | 80% | 2369 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 36,927 psi | 75% | 2320 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 39,711 psi | 81% | 2408 fps | 98.6% |
| Norma URP | <<locked>> | 84% | 32,895 psi | 67% | 2306 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 39,015 psi | 79% | 2415 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 39,146 psi | 79% | 2448 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,876 psi | 55% | 1450 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,002 psi | 83% | 2402 fps | 95.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,360 psi | 70% | 2388 fps | 99.6% |
| ReloadSwiss RS 62 | 42.6 gr | 86% | 34,693 psi | 70% | 2375 fps | 95.7% |
| ReloadSwiss RS 70 | 44.3 gr | 88% | 37,217 psi | 75% | 2434 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 41,510 psi | 84% | 2385 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 35,027 psi | 71% | 2313 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 84% | 36,927 psi | 75% | 2320 fps | 95.2% |
| Shooters World Precision | <<locked>> | 80% | 39,610 psi | 80% | 2369 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,810 psi | 73% | 2356 fps | 97.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,405 psi | 76% | 2260 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 41,060 psi | 83% | 2362 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 35,911 psi | 73% | 2320 fps | 98.2% |
| Somchem S365 | <<locked>> | 80% | 26,034 psi | 53% | 2162 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 41,017 psi | 83% | 2365 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,727 psi | 85% | 2379 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,113 psi | 69% | 2260 fps | 98.8% |
| Vihtavuori N160 | <<locked>> | 84% | 34,563 psi | 70% | 2313 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 40,074 psi | 81% | 2369 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 33,808 psi | 69% | 2310 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 90% | 30,501 psi | 62% | 2300 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,255 psi | 61% | 2192 fps | 96.4% |
| Winchester StaBALL HD | <<locked>> | 94% | 28,456 psi | 58% | 2293 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 49 powders for 7 x 57 R loaded with the .284 | 160gr | Speer TBBC. Alliant Reloder-26 delivers the highest muzzle velocity at 2,625 fps; across all powders the maximum-charge window runs from 1,585 fps to 2,625 fps. Accurate 3100 gives the best case fill at 100 %, and 49 of the 49 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 70–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.284" calls for a 1:10.5 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 70, Alliant Reloder-17, ReloadSwiss RS 62 rank at the top here: for 7 x 57 R with the .284 | 160gr | Speer TBBC 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.