Load Specifications
Load data in caliber 7 x 50 R with .284 | 158gr | Prvi Partizan Grom bullet and 41 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 Shooters World AR Plus.
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% | 47,543 psi | 90% | 2060 fps | 100% |
| Accurate 2015ᴾ | <<locked>> | 100% | 42,627 psi | 81% | 2077 fps | 99.3% |
| Accurate 2460ᴾ | <<locked>> | 100% | 47,369 psi | 89% | 2156 fps | 97.8% |
| Accurate 2495ᴾ | <<locked>> | 100% | 30,792 psi | 58% | 1969 fps | 97.5% |
| Accurate 2520ᴾ | <<locked>> | 100% | 40,640 psi | 77% | 2103 fps | 96% |
| Accurate LT-30 | <<locked>> | 92% | 45,701 psi | 86% | 2031 fps | 98.6% |
| Accurate LT-32 | <<locked>> | 92% | 46,253 psi | 87% | 2034 fps | 97% |
| ADI AR 2207 | <<locked>> | 92% | 47,137 psi | 89% | 2103 fps | 100% |
| ADI AR 2219 | <<locked>> | 94% | 44,831 psi | 85% | 2133 fps | 98.4% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 39,769 psi | 75% | 2100 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 98% | 46,818 psi | 88% | 2139 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 90% | 46,079 psi | 87% | 2073 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 94% | 46,093 psi | 87% | 2060 fps | 98.9% |
| Hodgdon Benchmarkᴾ | <<locked>> | 100% | 46,557 psi | 88% | 2090 fps | 95.8% |
| Hodgdon H322 | <<locked>> | 98% | 46,006 psi | 87% | 2149 fps | 98.6% |
| Hodgdon H335 | <<locked>> | 98% | 46,949 psi | 89% | 2165 fps | 97.9% |
| Hodgdon H4198 | <<locked>> | 90% | 47,311 psi | 89% | 2060 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,053 psi | 59% | 1243 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 37,449 psi | 71% | 2073 fps | 97.8% |
| IMR 4198 | <<locked>> | 96% | 46,543 psi | 88% | 2087 fps | 100% |
| IMR 4227 | <<locked>> | 84% | 45,484 psi | 86% | 2011 fps | 100% |
| Lovex D073.4 | <<locked>> | 92% | 45,542 psi | 86% | 2129 fps | 96.8% |
| Lovex D073.5ᴾ | <<locked>> | 100% | 47,326 psi | 89% | 2152 fps | 96.5% |
| Lovex S053 | <<locked>> | 86% | 46,499 psi | 88% | 2005 fps | 100% |
| Norma 200 | <<locked>> | 94% | 47,181 psi | 89% | 2129 fps | 100% |
| Norma 202ᴾ | <<locked>> | 100% | 37,898 psi | 72% | 2041 fps | 96% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,038 psi | 59% | 1276 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 86% | 46,978 psi | 89% | 2067 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 98% | 45,847 psi | 87% | 2129 fps | 96.7% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 42,453 psi | 80% | 2077 fps | 96.9% |
| Shooters World AR Plus | <<locked>> | 92% | 45,542 psi | 86% | 2129 fps | 96.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 88% | 45,614 psi | 86% | 1873 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 94% | 45,005 psi | 85% | 2136 fps | 97.5% |
| SNPE Vectan SP 3 | <<locked>> | 98% | 47,805 psi | 90% | 2139 fps | 99.4% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 42,612 psi | 80% | 2021 fps | 96.9% |
| Somchem S335ᴾ | <<locked>> | 100% | 40,379 psi | 76% | 2018 fps | 97.4% |
| Vihtavuori N120 | <<locked>> | 92% | 47,340 psi | 89% | 2067 fps | 100% |
| Vihtavuori N130 | <<locked>> | 98% | 44,889 psi | 85% | 2064 fps | 99.8% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 41,669 psi | 79% | 2031 fps | 99% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 34,026 psi | 64% | 1988 fps | 97.9% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 36,709 psi | 69% | 1995 fps | 95.8% |
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% | 36,941 psi | 70% | 1916 fps | 99.1% |
| Accurate 2015 | <<locked>> | 84% | 26,281 psi | 50% | 1791 fps | 95.1% |
| Accurate 2460 | <<locked>> | 92% | 35,897 psi | 68% | 1991 fps | 95.1% |
| Accurate 2495 | <<locked>> | 94% | 25,469 psi | 48% | 1860 fps | 95.6% |
| Accurate 2520 | <<locked>> | 98% | 37,913 psi | 72% | 2060 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 31,923 psi | 60% | 1811 fps | 95.3% |
| Accurate LT-32 | <<locked>> | 86% | 38,435 psi | 73% | 1919 fps | 95.1% |
| ADI AR 2207 | <<locked>> | 80% | 32,692 psi | 62% | 1900 fps | 100% |
| ADI AR 2219 | 20.1 gr | 84% | 32,474 psi | 61% | 1929 fps | 95.2% |
| Alliant AR-Comp | <<locked>> | 82% | 23,047 psi | 44% | 1752 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 26,905 psi | 51% | 1811 fps | 96.8% |
| Alliant Reloder-7 | <<locked>> | 80% | 34,258 psi | 65% | 1896 fps | 99.1% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 31,647 psi | 60% | 1841 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 98% | 43,671 psi | 82% | 2051 fps | 95.1% |
| Hodgdon H322 | <<locked>> | 86% | 32,068 psi | 61% | 1919 fps | 95.1% |
| Hodgdon H335 | <<locked>> | 90% | 36,143 psi | 68% | 2001 fps | 95.3% |
| Hodgdon H4198 | <<locked>> | 80% | 35,201 psi | 66% | 1877 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,134 psi | 44% | 1112 fps | 100% |
| IMR 3031 | <<locked>> | 94% | 31,517 psi | 60% | 1959 fps | 95.8% |
| IMR 4198 | <<locked>> | 80% | 29,820 psi | 56% | 1818 fps | 98.3% |
| IMR 4227 | <<locked>> | 80% | 40,089 psi | 76% | 1939 fps | 100% |
| Lovex D073.4 | <<locked>> | 88% | 39,581 psi | 75% | 2047 fps | 95.4% |
| Lovex D073.5 | <<locked>> | 96% | 41,176 psi | 78% | 2070 fps | 95% |
| Lovex S053 | <<locked>> | 80% | 39,450 psi | 75% | 1913 fps | 100% |
| Norma 200 | <<locked>> | 80% | 30,618 psi | 58% | 1877 fps | 98.6% |
| Norma 202 | <<locked>> | 98% | 35,955 psi | 68% | 2008 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,800 psi | 43% | 1138 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 39,407 psi | 74% | 1965 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 94% | 40,625 psi | 77% | 2054 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 94% | 35,331 psi | 67% | 1962 fps | 95% |
| Shooters World AR Plus | 21.9 gr | 88% | 39,581 psi | 75% | 2047 fps | 95.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 36,579 psi | 69% | 1762 fps | 100% |
| SNPE Vectan SP 10 | 21.8 gr | 88% | 36,912 psi | 70% | 2011 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 29,660 psi | 56% | 1844 fps | 95.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 37,637 psi | 71% | 1949 fps | 95.6% |
| Somchem S335 | <<locked>> | 92% | 31,836 psi | 60% | 1877 fps | 95% |
| Vihtavuori N120 | <<locked>> | 80% | 32,938 psi | 62% | 1873 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 26,469 psi | 50% | 1755 fps | 96.1% |
| Vihtavuori N133 | <<locked>> | 86% | 27,615 psi | 52% | 1785 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 92% | 26,731 psi | 50% | 1837 fps | 95.2% |
| Vihtavuori N140 | <<locked>> | 98% | 34,447 psi | 65% | 1955 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 41 powders for 7 x 50 R loaded with the .284 | 158gr | Prvi Partizan Grom. Hodgdon H335 delivers the highest muzzle velocity at 2,165 fps; across all powders the maximum-charge window runs from 1,243 fps to 2,165 fps. Accurate 2015 gives the best case fill at 100 %, and 41 of the 41 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (365 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 158.0 gr projectile in 0.284" calls for a 1:11.0 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, Shooters World AR Plus rank at the top here: for 7 x 50 R with the .284 | 158gr | Prvi Partizan Grom they combine a high case fill with complete burn and sit in the upper velocity band. 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.