Load Specifications
Load data in caliber 7 x 50 R with .284 | 100gr | Sierra VarmintKing bullet and 20 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2207, Alliant Reloder-7 and ReloadSwiss RS 36.
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 1680 | <<locked>> | 92% | 46,731 psi | 88% | 2694 fps | 98% |
| ADI AR 2205 | <<locked>> | 84% | 47,398 psi | 90% | 2608 fps | 100% |
| ADI AR 2207 | <<locked>> | 98% | 46,963 psi | 89% | 2795 fps | 100% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 40,973 psi | 77% | 2713 fps | 97.2% |
| Alliant Reloder-7 | <<locked>> | 96% | 47,036 psi | 89% | 2749 fps | 98.6% |
| Baschieri & Pellagri 106ᴾ | <<locked>> | 100% | 47,805 psi | 90% | 2713 fps | 95.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 29,660 psi | 56% | 1673 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 44,382 psi | 84% | 2713 fps | 98.5% |
| IMR 4227 | <<locked>> | 90% | 46,369 psi | 88% | 2687 fps | 99.6% |
| Lovex D060 | <<locked>> | 84% | 47,500 psi | 90% | 2730 fps | 98.8% |
| Lovex S053 | <<locked>> | 92% | 47,529 psi | 90% | 2700 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 46,673 psi | 88% | 2802 fps | 98.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 29,211 psi | 55% | 1713 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 90% | 45,165 psi | 85% | 2713 fps | 99.4% |
| Shooters World Buffalo Rifle | <<locked>> | 84% | 47,500 psi | 90% | 2730 fps | 98.8% |
| Shooters World SOCOM | <<locked>> | 82% | 44,947 psi | 85% | 2654 fps | 99% |
| SNPE Vectan BA6 1/2 | <<locked>> | 94% | 46,006 psi | 87% | 2533 fps | 100% |
| Vihtavuori N110 | <<locked>> | 86% | 47,181 psi | 89% | 2621 fps | 100% |
| Vihtavuori N120 | <<locked>> | 98% | 47,181 psi | 89% | 2753 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 40,292 psi | 76% | 2628 fps | 96.5% |
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 1680 | <<locked>> | 84% | 36,013 psi | 68% | 2493 fps | 95.4% |
| ADI AR 2205 | <<locked>> | 80% | 41,989 psi | 79% | 2520 fps | 100% |
| ADI AR 2207 | 21.7 gr | 80% | 26,905 psi | 51% | 2369 fps | 96.5% |
| Alliant Reloder-10x | <<locked>> | 94% | 34,258 psi | 65% | 2569 fps | 95.2% |
| Alliant Reloder-7 | 23.6 gr | 84% | 32,489 psi | 61% | 2457 fps | 95.1% |
| Baschieri & Pellagri 106 | <<locked>> | 98% | 44,454 psi | 84% | 2657 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 21,509 psi | 41% | 1490 fps | 100% |
| IMR 4198 | <<locked>> | 88% | 31,850 psi | 60% | 2441 fps | 95% |
| IMR 4227 | <<locked>> | 80% | 34,563 psi | 65% | 2461 fps | 97.7% |
| Lovex D060 | <<locked>> | 80% | 42,134 psi | 80% | 2628 fps | 97.9% |
| Lovex S053 | <<locked>> | 80% | 33,388 psi | 63% | 2438 fps | 99.6% |
| Norma 200 | <<locked>> | 88% | 32,039 psi | 61% | 2507 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 21,335 psi | 40% | 1529 fps | 100% |
| ReloadSwiss RS 36 | 22.6 gr | 80% | 33,272 psi | 63% | 2474 fps | 97.2% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 42,134 psi | 80% | 2628 fps | 97.9% |
| Shooters World SOCOM | <<locked>> | 80% | 41,640 psi | 79% | 2595 fps | 98.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 31,836 psi | 60% | 2293 fps | 100% |
| Vihtavuori N110 | <<locked>> | 80% | 39,537 psi | 75% | 2500 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 27,267 psi | 52% | 2349 fps | 97.9% |
| Vihtavuori N130 | <<locked>> | 96% | 35,723 psi | 67% | 2533 fps | 95.2% |
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 33 powders for 7 x 50 R loaded with the .284 | 100gr | Sierra VarmintKing. Norma 200 delivers the highest muzzle velocity at 2,802 fps; across all powders the maximum-charge window runs from 1,673 fps to 2,802 fps. Accurate 2015 gives the best case fill at 100 %, and 33 of the 33 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (365 MPa), the top charges use 55–90 %, 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 2015, ADI AR 2219, Alliant AR-Comp 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. ADI AR 2207, Alliant Reloder-7, ReloadSwiss RS 36 rank at the top here: for 7 x 50 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 2015, Accurate LT-32, ADI AR 2219 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.