Load Specifications
Load data in caliber 7 x 57 R with .284 | 175gr | Alaska Bullet Works Kodiak PP SPBC bullet and 47 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP 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 3100 | <<locked>> | 98% | 42,293 psi | 86% | 2392 fps | 97.7% |
| Accurate 4350 | <<locked>> | 90% | 44,599 psi | 90% | 2441 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 82% | 43,671 psi | 89% | 2349 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 43,642 psi | 89% | 2369 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 43,526 psi | 88% | 2451 fps | 99.5% |
| Alliant Reloder-17 | <<locked>> | 86% | 43,468 psi | 88% | 2470 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,830 psi | 87% | 2464 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,710 psi | 76% | 2379 fps | 97% |
| Alliant Reloder-26 | <<locked>> | 96% | 41,843 psi | 85% | 2513 fps | 98.9% |
| Bofors RP3 | <<locked>> | 82% | 43,743 psi | 89% | 2382 fps | 100% |
| Bofors RP7 | <<locked>> | 86% | 44,077 psi | 89% | 2356 fps | 96.5% |
| Hodgdon H380 | <<locked>> | 82% | 44,295 psi | 90% | 2385 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 88% | 44,295 psi | 90% | 2441 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 42,946 psi | 87% | 2388 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 43,758 psi | 89% | 2457 fps | 96.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,998 psi | 73% | 1529 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 44,498 psi | 90% | 2388 fps | 96.7% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,207 psi | 88% | 2343 fps | 96.8% |
| IMR 4831 | <<locked>> | 90% | 42,612 psi | 86% | 2395 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 42,801 psi | 87% | 2343 fps | 98% |
| Lovex S070 | <<locked>> | 88% | 43,381 psi | 88% | 2369 fps | 97.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,550 psi | 76% | 2306 fps | 96.5% |
| Norma MRP | <<locked>> | 96% | 41,771 psi | 85% | 2470 fps | 96.5% |
| Norma URP | <<locked>> | 90% | 44,469 psi | 90% | 2438 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 90% | 43,033 psi | 87% | 2428 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,535 psi | 74% | 1565 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 43,250 psi | 88% | 2467 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 44,382 psi | 90% | 2464 fps | 99.2% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 43,540 psi | 88% | 2477 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 84% | 43,903 psi | 89% | 2379 fps | 100% |
| Rottweil R 907 | <<locked>> | 86% | 44,077 psi | 89% | 2356 fps | 96.5% |
| Shooters World Long Rifle | <<locked>> | 86% | 42,801 psi | 87% | 2343 fps | 98% |
| Shooters World SW4350 | <<locked>> | 88% | 43,381 psi | 88% | 2369 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 42,293 psi | 86% | 2382 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 43,149 psi | 88% | 2257 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,264 psi | 86% | 2293 fps | 96.7% |
| Somchem S355 | <<locked>> | 84% | 44,556 psi | 90% | 2379 fps | 99.9% |
| Somchem S365 | <<locked>> | 92% | 42,482 psi | 86% | 2441 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 42,134 psi | 85% | 2382 fps | 96% |
| Vihtavuori N150 | <<locked>> | 84% | 42,453 psi | 86% | 2316 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 43,468 psi | 88% | 2388 fps | 99.1% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 44,150 psi | 90% | 2405 fps | 96% |
| Vihtavuori N550 | <<locked>> | 88% | 42,699 psi | 87% | 2392 fps | 98.8% |
| Vihtavuori N555 | <<locked>> | 98% | 44,382 psi | 90% | 2480 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 42,902 psi | 87% | 2365 fps | 99.9% |
| Winchester 760 | <<locked>> | 88% | 44,295 psi | 90% | 2441 fps | 97.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,334 psi | 78% | 2493 fps | 100% |
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 3100 | <<locked>> | 92% | 34,519 psi | 70% | 2247 fps | 95.5% |
| Accurate 4350 | <<locked>> | 80% | 31,720 psi | 64% | 2192 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 80% | 41,176 psi | 84% | 2306 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,104 psi | 83% | 2326 fps | 99.8% |
| Alliant Reloder-16 | 37.4 gr | 80% | 31,879 psi | 65% | 2205 fps | 96.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,578 psi | 72% | 2316 fps | 99.1% |
| Alliant Reloder-23 | <<locked>> | 84% | 26,237 psi | 53% | 2083 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 96% | 33,431 psi | 68% | 2280 fps | 95.2% |
| Alliant Reloder-26 | 45.4 gr | 88% | 31,604 psi | 64% | 2283 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 40,843 psi | 83% | 2333 fps | 99.9% |
| Bofors RP7 | <<locked>> | 82% | 39,160 psi | 79% | 2267 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 41,727 psi | 85% | 2343 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 84% | 38,783 psi | 79% | 2339 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,472 psi | 60% | 2116 fps | 97.3% |
| Hodgdon Superformance | <<locked>> | 86% | 40,712 psi | 83% | 2402 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,701 psi | 54% | 1358 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 39,349 psi | 80% | 2293 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,218 psi | 78% | 2247 fps | 95.3% |
| IMR 4831 | <<locked>> | 80% | 30,937 psi | 63% | 2159 fps | 96.1% |
| Lovex S065 | <<locked>> | 80% | 35,665 psi | 72% | 2201 fps | 96.1% |
| Lovex S070 | <<locked>> | 82% | 36,129 psi | 73% | 2231 fps | 95% |
| Lovex S071 | <<locked>> | 98% | 35,230 psi | 71% | 2260 fps | 95.7% |
| Norma MRP | 47.1 gr | 94% | 39,117 psi | 79% | 2418 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 32,039 psi | 65% | 2195 fps | 96.3% |
| Ramshot Hunter | <<locked>> | 84% | 35,607 psi | 72% | 2280 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,253 psi | 55% | 1394 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,826 psi | 77% | 2369 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,517 psi | 64% | 2211 fps | 95.9% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 33,533 psi | 68% | 2264 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 80% | 38,566 psi | 78% | 2287 fps | 99.6% |
| Rottweil R 907 | <<locked>> | 82% | 39,160 psi | 79% | 2267 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,665 psi | 72% | 2201 fps | 96.1% |
| Shooters World SW4350 | <<locked>> | 82% | 36,129 psi | 73% | 2231 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,566 psi | 80% | 2333 fps | 99.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,582 psi | 82% | 2218 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 37,217 psi | 75% | 2201 fps | 95.2% |
| Somchem S355 | <<locked>> | 80% | 39,291 psi | 80% | 2290 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 28,718 psi | 58% | 2156 fps | 98.4% |
| Somchem S385 | <<locked>> | 92% | 39,697 psi | 81% | 2336 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 37,362 psi | 76% | 2228 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 33,330 psi | 68% | 2195 fps | 96.7% |
| Vihtavuori N165 | <<locked>> | 98% | 41,568 psi | 84% | 2359 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 32,982 psi | 67% | 2198 fps | 96.3% |
| Vihtavuori N555 | <<locked>> | 84% | 28,297 psi | 57% | 2152 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,822 psi | 67% | 2172 fps | 98.5% |
| Winchester 760 | <<locked>> | 82% | 36,477 psi | 74% | 2290 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 88% | 26,078 psi | 53% | 2149 fps | 95.9% |
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 70 powders for 7 x 57 R loaded with the .284 | 175gr | Alaska Bullet Works Kodiak PP SPBC. Alliant Reloder-26 delivers the highest muzzle velocity at 2,513 fps; across all powders the maximum-charge window runs from 1,529 fps to 2,513 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 70 of the 70 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (340 MPa), the top charges use 73–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Bofors RP15 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. Alliant Reloder-26, Norma MRP, Alliant Reloder-16 rank at the top here: for 7 x 57 R with the .284 | 175gr | Alaska Bullet Works Kodiak PP SPBC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Bofors RP15 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.