Load Specifications
Load data in caliber 7 x 50 R with .284 | 158gr | Sellier & Bellot XRG bullet and 37 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are SNPE Vectan SP 10, ADI AR 2219 and Norma 200.
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>> | 88% | 46,456 psi | 88% | 2028 fps | 99.8% |
| Accurate 2015ᴾ | <<locked>> | 100% | 40,843 psi | 77% | 2034 fps | 98.9% |
| Accurate 2460ᴾ | <<locked>> | 100% | 45,150 psi | 85% | 2110 fps | 97.1% |
| Accurate 2495ᴾ | <<locked>> | 100% | 29,211 psi | 55% | 1926 fps | 96.8% |
| Accurate LT-30 | <<locked>> | 94% | 47,065 psi | 89% | 2028 fps | 98.6% |
| Accurate LT-32 | <<locked>> | 94% | 47,630 psi | 90% | 2031 fps | 96.9% |
| ADI AR 2207 | <<locked>> | 92% | 45,469 psi | 86% | 2070 fps | 100% |
| ADI AR 2219 | <<locked>> | 96% | 46,383 psi | 88% | 2133 fps | 98.4% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 38,276 psi | 72% | 2060 fps | 99.9% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 47,442 psi | 90% | 2133 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 92% | 47,166 psi | 89% | 2070 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 96% | 47,195 psi | 89% | 2057 fps | 98.8% |
| Hodgdon H322ᴾ | <<locked>> | 100% | 47,645 psi | 90% | 2149 fps | 98.6% |
| Hodgdon H335 | <<locked>> | 98% | 45,629 psi | 86% | 2129 fps | 97.3% |
| Hodgdon H4198 | <<locked>> | 90% | 46,035 psi | 87% | 2024 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 30,647 psi | 58% | 1224 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 36,027 psi | 68% | 2028 fps | 97% |
| IMR 4198 | <<locked>> | 98% | 47,761 psi | 90% | 2083 fps | 100% |
| IMR 4227 | <<locked>> | 86% | 46,325 psi | 88% | 2005 fps | 100% |
| Lovex D073.4 | <<locked>> | 94% | 47,137 psi | 89% | 2133 fps | 96.8% |
| Lovex S053 | <<locked>> | 86% | 45,339 psi | 86% | 1975 fps | 100% |
| Norma 200 | <<locked>> | 96% | 47,747 psi | 90% | 2119 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 30,647 psi | 58% | 1260 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 86% | 45,382 psi | 86% | 2031 fps | 100% |
| ReloadSwiss RS 40ᴾ | <<locked>> | 100% | 46,789 psi | 88% | 2119 fps | 96.5% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 40,770 psi | 77% | 2034 fps | 96.2% |
| Shooters World AR Plus | <<locked>> | 94% | 47,137 psi | 89% | 2133 fps | 96.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 90% | 46,282 psi | 87% | 1867 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 96% | 46,485 psi | 88% | 2136 fps | 97.5% |
| SNPE Vectan SP 3 | <<locked>> | 98% | 46,528 psi | 88% | 2103 fps | 99.1% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 40,959 psi | 77% | 1982 fps | 96.1% |
| Somchem S335ᴾ | <<locked>> | 100% | 38,827 psi | 73% | 1978 fps | 96.8% |
| Vihtavuori N110 | <<locked>> | 82% | 47,253 psi | 89% | 1926 fps | 100% |
| Vihtavuori N120 | <<locked>> | 92% | 45,687 psi | 86% | 2034 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 46,195 psi | 87% | 2064 fps | 99.8% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 40,045 psi | 76% | 1988 fps | 98.5% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 32,605 psi | 62% | 1942 fps | 97.2% |
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>> | 80% | 35,737 psi | 68% | 1880 fps | 98.6% |
| Accurate 2015 | <<locked>> | 88% | 28,572 psi | 54% | 1827 fps | 95.8% |
| Accurate 2460 | <<locked>> | 94% | 36,898 psi | 70% | 1991 fps | 95% |
| Accurate 2495 | <<locked>> | 96% | 25,454 psi | 48% | 1847 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 82% | 32,880 psi | 62% | 1814 fps | 95.3% |
| Accurate LT-32 | <<locked>> | 88% | 39,885 psi | 75% | 1923 fps | 95.1% |
| ADI AR 2207 | <<locked>> | 80% | 31,618 psi | 60% | 1867 fps | 100% |
| ADI AR 2219 | 19.9 gr | 86% | 33,692 psi | 64% | 1932 fps | 95.3% |
| Alliant AR-Comp | <<locked>> | 84% | 23,699 psi | 45% | 1755 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 25,976 psi | 49% | 1775 fps | 96.1% |
| Alliant Reloder-7 | <<locked>> | 80% | 32,837 psi | 62% | 1857 fps | 98.6% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 32,343 psi | 61% | 1837 fps | 95.5% |
| Hodgdon H322 | <<locked>> | 90% | 34,635 psi | 65% | 1949 fps | 95.6% |
| Hodgdon H335 | <<locked>> | 92% | 37,275 psi | 70% | 2001 fps | 95.2% |
| Hodgdon H4198 | <<locked>> | 80% | 34,374 psi | 65% | 1844 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 22,524 psi | 43% | 1093 fps | 100% |
| IMR 3031 | <<locked>> | 96% | 32,300 psi | 61% | 1955 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 28,892 psi | 55% | 1785 fps | 97.8% |
| IMR 4227 | <<locked>> | 80% | 38,957 psi | 74% | 1906 fps | 100% |
| Lovex D073.4 | <<locked>> | 90% | 40,654 psi | 77% | 2044 fps | 95.3% |
| Lovex S053 | <<locked>> | 80% | 38,290 psi | 72% | 1883 fps | 100% |
| Norma 200 | 17.5 gr | 80% | 29,196 psi | 55% | 1834 fps | 98% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,713 psi | 43% | 1125 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 37,826 psi | 71% | 1926 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 96% | 41,365 psi | 78% | 2044 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 98% | 38,609 psi | 73% | 2001 fps | 95.6% |
| Shooters World AR Plus | <<locked>> | 90% | 40,654 psi | 77% | 2044 fps | 95.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 35,781 psi | 68% | 1739 fps | 100% |
| SNPE Vectan SP 10 | 21.5 gr | 90% | 37,898 psi | 72% | 2011 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 30,545 psi | 58% | 1847 fps | 95.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 98% | 38,682 psi | 73% | 1946 fps | 95.5% |
| Somchem S335 | <<locked>> | 96% | 34,389 psi | 65% | 1906 fps | 95.5% |
| Vihtavuori N110 | <<locked>> | 80% | 44,483 psi | 84% | 1896 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 31,865 psi | 60% | 1841 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 25,295 psi | 48% | 1713 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 88% | 28,079 psi | 53% | 1778 fps | 95% |
| Vihtavuori N135 | <<locked>> | 94% | 27,253 psi | 51% | 1834 fps | 95.1% |
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 62 powders for 7 x 50 R loaded with the .284 | 158gr | Sellier & Bellot XRG. Alliant Power Pro 1200-R delivers the highest muzzle velocity at 2,182 fps; across all powders the maximum-charge window runs from 1,224 fps to 2,182 fps. Accurate 2015 gives the best case fill at 100 %, and 62 of the 62 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (365 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 158.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 2015, Accurate 2460, Accurate 2495 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. SNPE Vectan SP 10, ADI AR 2219, Norma 200 rank at the top here: for 7 x 50 R with the .284 | 158gr | Sellier & Bellot XRG they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2200, Accurate 2230, Accurate 4064 burn incompletely and react more sensitively to barrel length and temperature. Hodgdon TrailBoss stay subsonic at start load. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.