Load Specifications
Load data in caliber 7 x 57 R with .284 | 100gr | Sierra VarmintKing bullet and 41 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Accurate 4064 and Vihtavuori N135.
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 2015 | <<locked>> | 84% | 43,149 psi | 88% | 3012 fps | 99.9% |
| Accurate 2460 | <<locked>> | 82% | 44,237 psi | 90% | 3058 fps | 98.7% |
| Accurate 2495 | <<locked>> | 90% | 42,728 psi | 87% | 3054 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 42,090 psi | 85% | 3051 fps | 98% |
| Accurate 4064 | <<locked>> | 92% | 42,888 psi | 87% | 3084 fps | 99% |
| ADI Benchmark 8208 | <<locked>> | 86% | 44,614 psi | 90% | 3074 fps | 96.9% |
| Alliant AR-Comp | <<locked>> | 86% | 43,091 psi | 87% | 3097 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 42,090 psi | 85% | 3064 fps | 95.8% |
| Bofors RP3 | <<locked>> | 94% | 44,614 psi | 90% | 3130 fps | 96.7% |
| Hodgdon Benchmark | <<locked>> | 84% | 44,295 psi | 90% | 3025 fps | 97.4% |
| Hodgdon BL-C2 | <<locked>> | 86% | 42,801 psi | 87% | 3084 fps | 97.1% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 43,758 psi | 89% | 3140 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,069 psi | 69% | 2034 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 43,845 psi | 89% | 3074 fps | 95.8% |
| IMR 3031 | <<locked>> | 88% | 43,976 psi | 89% | 3143 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 44,614 psi | 90% | 3074 fps | 96.9% |
| Lovex D073.5 | <<locked>> | 82% | 44,092 psi | 89% | 3058 fps | 97.7% |
| Lovex D073.6 | <<locked>> | 88% | 43,410 psi | 88% | 3091 fps | 98.2% |
| Lovex S062 | <<locked>> | 90% | 42,308 psi | 86% | 3035 fps | 96.4% |
| Norma 201 | <<locked>> | 88% | 44,222 psi | 90% | 3064 fps | 96.9% |
| Norma 202 | <<locked>> | 88% | 44,164 psi | 90% | 3084 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,142 psi | 69% | 2080 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 44,150 psi | 90% | 3068 fps | 98.1% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 42,293 psi | 86% | 3156 fps | 97.6% |
| Rottweil R 901 | <<locked>> | 84% | 42,641 psi | 86% | 3018 fps | 98.4% |
| Rottweil R 902 | <<locked>> | 90% | 44,411 psi | 90% | 3061 fps | 96.9% |
| Rottweil R 903 | <<locked>> | 96% | 44,483 psi | 90% | 3117 fps | 96.3% |
| Shooters World Match Rifle | <<locked>> | 88% | 43,410 psi | 88% | 3091 fps | 98.2% |
| Shooters World Precision | <<locked>> | 90% | 42,308 psi | 86% | 3035 fps | 96.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 43,366 psi | 88% | 2982 fps | 98.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 42,989 psi | 87% | 2979 fps | 99.3% |
| Somchem S321 | <<locked>> | 82% | 42,221 psi | 86% | 3041 fps | 96.6% |
| Somchem S335 | <<locked>> | 86% | 42,685 psi | 87% | 2982 fps | 99.2% |
| Vihtavuori N130 | <<locked>> | 82% | 43,468 psi | 88% | 2982 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 43,279 psi | 88% | 2989 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 90% | 42,917 psi | 87% | 3058 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 44,541 psi | 90% | 3064 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 96% | 43,830 psi | 89% | 3058 fps | 97.3% |
| Vihtavuori N530 | <<locked>> | 84% | 41,829 psi | 85% | 3009 fps | 96.2% |
| Vihtavuori N540 | <<locked>> | 90% | 43,105 psi | 87% | 3045 fps | 98.6% |
| Winchester 748 | <<locked>> | 86% | 43,613 psi | 88% | 3114 fps | 97.6% |
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% | 38,058 psi | 77% | 2904 fps | 99.5% |
| Accurate 2460 | <<locked>> | 80% | 41,350 psi | 84% | 2995 fps | 98.1% |
| Accurate 2495 | <<locked>> | 80% | 30,487 psi | 62% | 2762 fps | 98.1% |
| Accurate 2520 | <<locked>> | 80% | 36,434 psi | 74% | 2917 fps | 96.4% |
| Accurate 4064 | 42.7 gr | 82% | 30,734 psi | 62% | 2782 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 39,334 psi | 80% | 2953 fps | 95.3% |
| Alliant AR-Comp | <<locked>> | 80% | 35,085 psi | 71% | 2920 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 39,537 psi | 80% | 3005 fps | 95% |
| Bofors RP3 | <<locked>> | 90% | 39,059 psi | 79% | 3002 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 39,131 psi | 79% | 2907 fps | 96% |
| Hodgdon BL-C2 | <<locked>> | 82% | 37,144 psi | 75% | 2949 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 40,944 psi | 83% | 3074 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,222 psi | 51% | 1821 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 41,292 psi | 84% | 3015 fps | 95% |
| IMR 3031 | <<locked>> | 80% | 33,605 psi | 68% | 2897 fps | 98% |
| IMR 8208 XBR | <<locked>> | 82% | 39,334 psi | 80% | 2953 fps | 95.3% |
| Lovex D073.5 | <<locked>> | 80% | 40,973 psi | 83% | 2989 fps | 96.9% |
| Lovex D073.6 | <<locked>> | 80% | 32,822 psi | 67% | 2831 fps | 95% |
| Lovex S062 | <<locked>> | 88% | 39,581 psi | 80% | 2972 fps | 95.6% |
| Norma 201 | <<locked>> | 84% | 38,943 psi | 79% | 2946 fps | 95.3% |
| Norma 202 | <<locked>> | 80% | 34,040 psi | 69% | 2844 fps | 96.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,135 psi | 51% | 1860 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 41,568 psi | 84% | 3009 fps | 97.5% |
| ReloadSwiss RS 60 | 50.3 gr | 90% | 37,086 psi | 75% | 3015 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 37,811 psi | 77% | 2907 fps | 97.2% |
| Rottweil R 902 | <<locked>> | 86% | 39,363 psi | 80% | 2946 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 94% | 41,495 psi | 84% | 3051 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,822 psi | 67% | 2831 fps | 95% |
| Shooters World Precision | <<locked>> | 88% | 39,581 psi | 80% | 2972 fps | 95.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 35,940 psi | 73% | 2812 fps | 96.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,298 psi | 59% | 2644 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 39,508 psi | 80% | 2976 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 35,476 psi | 72% | 2815 fps | 97.7% |
| Vihtavuori N130 | <<locked>> | 80% | 40,886 psi | 83% | 2927 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 35,882 psi | 73% | 2825 fps | 99.1% |
| Vihtavuori N135 | 40.3 gr | 80% | 31,009 psi | 63% | 2772 fps | 98.1% |
| Vihtavuori N140 | <<locked>> | 80% | 32,300 psi | 66% | 2776 fps | 96.1% |
| Vihtavuori N150 | <<locked>> | 92% | 38,435 psi | 78% | 2940 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 82% | 39,320 psi | 80% | 2949 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 82% | 33,069 psi | 67% | 2805 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 35,375 psi | 72% | 2917 fps | 95% |
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 77 powders for 7 x 57 R loaded with the .284 | 100gr | Sierra VarmintKing. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,176 fps; across all powders the maximum-charge window runs from 2,034 fps to 3,176 fps. Accurate 4350 gives the best case fill at 100 %, and 77 of the 77 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 100.0 gr projectile in 0.284" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, 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. ReloadSwiss RS 60, Accurate 4064, Vihtavuori N135 rank at the top here: for 7 x 57 R with the .284 | 100gr | Sierra VarmintKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 4350, ADI AR 2206H, ADI AR 2208 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.