Load Specifications
Load data in caliber 7 x 57 with .284 | 140gr | Barnes MRX BT bullet and 84 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, 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 2015 | <<locked>> | 84% | 50,981 psi | 90% | 2687 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 48,617 psi | 86% | 2697 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 51,068 psi | 90% | 2766 fps | 100% |
| Accurate 4064 | <<locked>> | 90% | 48,762 psi | 86% | 2740 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 47,993 psi | 85% | 2802 fps | 98.4% |
| ADI AR 2206H | <<locked>> | 86% | 50,343 psi | 89% | 2776 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 90% | 48,109 psi | 85% | 2720 fps | 98.7% |
| ADI Benchmark 8208 | <<locked>> | 84% | 49,632 psi | 88% | 2730 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 84% | 49,676 psi | 88% | 2717 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 49,559 psi | 88% | 2877 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 50,705 psi | 90% | 2792 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 88% | 48,356 psi | 85% | 2759 fps | 98.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,343 psi | 89% | 2864 fps | 99% |
| Alliant Reloder-17 | <<locked>> | 94% | 47,790 psi | 84% | 2844 fps | 99.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,418 psi | 63% | 2585 fps | 96.7% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 49,951 psi | 88% | 2785 fps | 98.7% |
| Bofors RP3 | <<locked>> | 92% | 50,995 psi | 90% | 2805 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 82% | 48,312 psi | 85% | 2667 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 84% | 48,167 psi | 85% | 2749 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 82% | 49,951 psi | 88% | 2841 fps | 99.1% |
| Hodgdon H380 | <<locked>> | 90% | 49,008 psi | 87% | 2762 fps | 98% |
| Hodgdon H4895 | <<locked>> | 86% | 50,821 psi | 90% | 2785 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,470 psi | 82% | 2746 fps | 99.3% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 49,850 psi | 88% | 2815 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,998 psi | 62% | 1719 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 48,747 psi | 86% | 2736 fps | 99.5% |
| IMR 3031 | <<locked>> | 86% | 50,270 psi | 89% | 2772 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 50,604 psi | 89% | 2753 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 88% | 51,053 psi | 90% | 2730 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 94% | 50,531 psi | 89% | 2753 fps | 96% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,023 psi | 87% | 2799 fps | 98.6% |
| IMR 4895 | <<locked>> | 88% | 49,574 psi | 88% | 2792 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 84% | 49,632 psi | 88% | 2730 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 86% | 49,356 psi | 87% | 2749 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 50,386 psi | 89% | 2710 fps | 99.4% |
| Lovex S062 | <<locked>> | 90% | 50,154 psi | 89% | 2749 fps | 99.9% |
| Lovex S065 | <<locked>> | 96% | 49,705 psi | 88% | 2746 fps | 97.4% |
| Lovex S070 | <<locked>> | 98% | 50,183 psi | 89% | 2772 fps | 96.4% |
| Norma 201 | <<locked>> | 86% | 48,892 psi | 86% | 2720 fps | 99.8% |
| Norma 202 | <<locked>> | 86% | 49,617 psi | 88% | 2730 fps | 100% |
| Norma 203B | <<locked>> | 90% | 50,720 psi | 90% | 2799 fps | 99.5% |
| Norma URP | <<locked>> | 98% | 47,921 psi | 85% | 2799 fps | 98.3% |
| Ramshot Big Game | <<locked>> | 90% | 50,879 psi | 90% | 2822 fps | 99.4% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 50,299 psi | 89% | 2844 fps | 97.1% |
| Ramshot TAC | <<locked>> | 84% | 49,719 psi | 88% | 2740 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 49,153 psi | 87% | 2759 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 82% | 50,227 psi | 89% | 2726 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,273 psi | 62% | 1759 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 49,487 psi | 87% | 2743 fps | 96.6% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 48,109 psi | 85% | 2818 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 51,053 psi | 90% | 2910 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 47,921 psi | 85% | 2825 fps | 98.1% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 48,254 psi | 85% | 2841 fps | 97.6% |
| Rottweil R 901 | <<locked>> | 84% | 49,806 psi | 88% | 2707 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 49,501 psi | 88% | 2720 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 94% | 50,865 psi | 90% | 2795 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 96% | 49,705 psi | 88% | 2746 fps | 97.4% |
| Shooters World Match Rifle | <<locked>> | 86% | 49,356 psi | 87% | 2749 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 50,154 psi | 89% | 2749 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 98% | 50,183 psi | 89% | 2772 fps | 96.4% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 49,385 psi | 87% | 2802 fps | 99.3% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 51,068 psi | 90% | 2766 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 48,762 psi | 86% | 2743 fps | 99.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 50,821 psi | 90% | 2674 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 50,952 psi | 90% | 2674 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 49,734 psi | 88% | 2697 fps | 95.9% |
| Somchem S321 | <<locked>> | 82% | 50,285 psi | 89% | 2759 fps | 99.9% |
| Somchem S335 | <<locked>> | 86% | 50,038 psi | 88% | 2671 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 50,952 psi | 90% | 2766 fps | 99.4% |
| Somchem S355 | <<locked>> | 92% | 48,356 psi | 85% | 2746 fps | 99.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 45,687 psi | 81% | 2799 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 82% | 50,720 psi | 90% | 2644 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 51,053 psi | 90% | 2664 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 49,052 psi | 87% | 2697 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 50,009 psi | 88% | 2710 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 49,647 psi | 88% | 2730 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 50,343 psi | 89% | 2795 fps | 98.5% |
| Vihtavuori N530 | <<locked>> | 84% | 49,690 psi | 88% | 2726 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 88% | 48,095 psi | 85% | 2700 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 49,443 psi | 87% | 2799 fps | 98.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,000 psi | 67% | 2657 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 51,169 psi | 90% | 2782 fps | 99.8% |
| Winchester 748 | <<locked>> | 84% | 49,153 psi | 87% | 2772 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 86% | 48,211 psi | 85% | 2746 fps | 99.5% |
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 2015 | <<locked>> | 80% | 44,991 psi | 80% | 2595 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,217 psi | 66% | 2507 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,164 psi | 78% | 2654 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 35,201 psi | 62% | 2490 fps | 99.6% |
| Accurate 4350 | <<locked>> | 90% | 36,187 psi | 64% | 2569 fps | 95.3% |
| ADI AR 2206H | <<locked>> | 80% | 41,292 psi | 73% | 2608 fps | 98% |
| ADI AR 2208 | <<locked>> | 80% | 35,346 psi | 62% | 2464 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,424 psi | 77% | 2625 fps | 99.3% |
| Alliant AR-Comp | <<locked>> | 80% | 43,192 psi | 76% | 2618 fps | 100% |
| Alliant Power Pro 2000-MR | 43 gr | 80% | 37,521 psi | 66% | 2625 fps | 95.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,534 psi | 61% | 2480 fps | 97.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,072 psi | 66% | 2536 fps | 96.4% |
| Alliant Reloder-16 | <<locked>> | 90% | 36,796 psi | 65% | 2585 fps | 95.5% |
| Alliant Reloder-17 | 43.4 gr | 82% | 31,836 psi | 56% | 2487 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 33,214 psi | 59% | 2526 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,509 psi | 72% | 2608 fps | 96.8% |
| Bofors RP3 | <<locked>> | 80% | 33,837 psi | 60% | 2474 fps | 97% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,353 psi | 80% | 2618 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,061 psi | 74% | 2641 fps | 99.4% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,441 psi | 82% | 2782 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 82% | 37,231 psi | 66% | 2533 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 41,669 psi | 74% | 2621 fps | 98.6% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 31,430 psi | 56% | 2425 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,594 psi | 66% | 2585 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,947 psi | 46% | 1535 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,176 psi | 71% | 2575 fps | 98.2% |
| IMR 3031 | <<locked>> | 80% | 41,176 psi | 73% | 2625 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,028 psi | 65% | 2497 fps | 96.5% |
| IMR 4166 Enduron | <<locked>> | 86% | 47,964 psi | 85% | 2677 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 92% | 47,456 psi | 84% | 2697 fps | 95.3% |
| IMR 4831 | <<locked>> | 92% | 37,550 psi | 66% | 2582 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 37,971 psi | 67% | 2569 fps | 97.3% |
| IMR 8208 XBR | <<locked>> | 80% | 43,424 psi | 77% | 2625 fps | 99.3% |
| Lovex D073.6 | <<locked>> | 80% | 40,161 psi | 71% | 2592 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 41,727 psi | 74% | 2552 fps | 98.2% |
| Lovex S062 | <<locked>> | 80% | 36,521 psi | 65% | 2493 fps | 98.1% |
| Lovex S065 | <<locked>> | 90% | 41,075 psi | 73% | 2589 fps | 95.2% |
| Lovex S070 | <<locked>> | 96% | 47,094 psi | 83% | 2720 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 40,538 psi | 72% | 2569 fps | 98.9% |
| Norma 202 | <<locked>> | 80% | 40,799 psi | 72% | 2579 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 36,463 psi | 64% | 2526 fps | 96.8% |
| Norma URP | <<locked>> | 90% | 36,753 psi | 65% | 2575 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 36,114 psi | 64% | 2539 fps | 96.4% |
| Ramshot Hunter | <<locked>> | 96% | 43,990 psi | 78% | 2730 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 43,439 psi | 77% | 2625 fps | 96.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,743 psi | 76% | 2644 fps | 98.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,195 psi | 83% | 2674 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,295 psi | 46% | 1575 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 43,337 psi | 77% | 2631 fps | 95% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,870 psi | 69% | 2638 fps | 96.9% |
| ReloadSwiss RS 60 | 42.3 gr | 80% | 31,662 psi | 56% | 2497 fps | 97.9% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 38,711 psi | 68% | 2644 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 42,148 psi | 75% | 2720 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 44,077 psi | 78% | 2612 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 38,435 psi | 68% | 2516 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 80% | 31,734 psi | 56% | 2418 fps | 95.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 41,075 psi | 73% | 2589 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,161 psi | 71% | 2592 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 36,521 psi | 65% | 2493 fps | 98.1% |
| Shooters World SW4350 | <<locked>> | 96% | 47,094 psi | 83% | 2720 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,083 psi | 58% | 2470 fps | 95.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,524 psi | 73% | 2595 fps | 96.2% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,089 psi | 71% | 2582 fps | 97.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,945 psi | 74% | 2526 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,650 psi | 61% | 2392 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 46,514 psi | 82% | 2641 fps | 95.2% |
| Somchem S321 | <<locked>> | 80% | 46,876 psi | 83% | 2703 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 41,669 psi | 74% | 2533 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,249 psi | 73% | 2595 fps | 97.9% |
| Somchem S355 | <<locked>> | 80% | 32,880 psi | 58% | 2431 fps | 96.1% |
| Somchem S365 | <<locked>> | 86% | 28,601 psi | 51% | 2405 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 47,543 psi | 84% | 2595 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,250 psi | 75% | 2526 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,623 psi | 67% | 2507 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,551 psi | 68% | 2516 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 31,154 psi | 55% | 2369 fps | 97% |
| Vihtavuori N160 | <<locked>> | 88% | 36,143 psi | 64% | 2526 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 43,584 psi | 77% | 2621 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 80% | 37,014 psi | 65% | 2500 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 37,884 psi | 67% | 2579 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 96% | 33,446 psi | 59% | 2552 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 31,865 psi | 56% | 2398 fps | 95.6% |
| Winchester 748 | <<locked>> | 80% | 42,844 psi | 76% | 2661 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,189 psi | 69% | 2579 fps | 98.1% |
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 84 powders for 7 x 57 loaded with the .284 | 140gr | Barnes MRX BT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,910 fps; across all powders the maximum-charge window runs from 1,719 fps to 2,910 fps. Alliant Reloder-16 gives the best case fill at 100 %, and 84 of the 84 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 140.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-16, Alliant Reloder-23, Hodgdon Hybrid 100V 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 Power Pro 2000-MR, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for 7 x 57 with the .284 | 140gr | Barnes MRX BT 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.