Load Specifications
Load data in caliber 7 x 50 R with .285 | 173gr | Prvi Partizan SP bullet and 57 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S321, Hodgdon H322 and SNPE Vectan SP 10.
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>> | 84% | 46,528 psi | 88% | 1972 fps | 100% |
| Accurate 2015 | <<locked>> | 98% | 46,079 psi | 87% | 2041 fps | 100% |
| Accurate 2460 | <<locked>> | 96% | 47,558 psi | 90% | 2083 fps | 99% |
| Accurate 2495ᴾ | <<locked>> | 100% | 36,985 psi | 70% | 1991 fps | 99.7% |
| Accurate 2520ᴾ | <<locked>> | 100% | 47,137 psi | 89% | 2113 fps | 98.7% |
| Accurate 4064ᴾ | <<locked>> | 100% | 34,519 psi | 65% | 1965 fps | 97.5% |
| Accurate LT-30 | <<locked>> | 90% | 47,645 psi | 90% | 1985 fps | 99.7% |
| Accurate LT-32 | <<locked>> | 88% | 45,223 psi | 85% | 1952 fps | 98.2% |
| ADI AR 2207 | <<locked>> | 88% | 46,891 psi | 89% | 2011 fps | 100% |
| ADI AR 2219 | <<locked>> | 92% | 47,761 psi | 90% | 2096 fps | 99.7% |
| ADI Benchmark 8208 | <<locked>> | 98% | 45,353 psi | 86% | 2051 fps | 96.6% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 45,078 psi | 85% | 2093 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 94% | 45,629 psi | 86% | 2123 fps | 96.3% |
| Alliant Reloder-10x | <<locked>> | 94% | 47,224 psi | 89% | 2060 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 86% | 45,585 psi | 86% | 1985 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 90% | 45,745 psi | 86% | 1988 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 96% | 46,238 psi | 87% | 2021 fps | 97.4% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 45,165 psi | 85% | 2106 fps | 97.4% |
| Hodgdon H322 | <<locked>> | 94% | 45,890 psi | 87% | 2073 fps | 99.5% |
| Hodgdon H335 | <<locked>> | 94% | 46,746 psi | 88% | 2093 fps | 99.1% |
| Hodgdon H4198 | <<locked>> | 86% | 46,949 psi | 89% | 1985 fps | 99.4% |
| Hodgdon H4895ᴾ | <<locked>> | 100% | 45,281 psi | 86% | 2080 fps | 96% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,314 psi | 61% | 1214 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 42,960 psi | 81% | 2087 fps | 99.7% |
| IMR 4198 | <<locked>> | 92% | 46,485 psi | 88% | 2008 fps | 100% |
| IMR 4227 | <<locked>> | 82% | 47,210 psi | 89% | 1952 fps | 100% |
| IMR 8208 XBR | <<locked>> | 98% | 45,353 psi | 86% | 2051 fps | 96.6% |
| Lovex D073.4 | <<locked>> | 88% | 45,281 psi | 86% | 2054 fps | 98.2% |
| Lovex D073.5 | <<locked>> | 96% | 47,471 psi | 90% | 2083 fps | 98% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 41,930 psi | 79% | 2057 fps | 97.9% |
| Lovex S053 | <<locked>> | 82% | 45,919 psi | 87% | 1913 fps | 100% |
| Norma 200 | <<locked>> | 90% | 47,152 psi | 89% | 2044 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 44,106 psi | 83% | 2037 fps | 96.5% |
| Norma 202ᴾ | <<locked>> | 100% | 43,569 psi | 82% | 2054 fps | 98.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,865 psi | 60% | 1240 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 82% | 46,398 psi | 88% | 1978 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 94% | 45,788 psi | 86% | 2057 fps | 98.1% |
| Rottweil R 901 | <<locked>> | 98% | 45,150 psi | 85% | 2041 fps | 98.7% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 41,292 psi | 78% | 1991 fps | 95.8% |
| Shooters World AR Plus | <<locked>> | 88% | 45,281 psi | 86% | 2054 fps | 98.2% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 41,930 psi | 79% | 2057 fps | 97.9% |
| Shooters World Tactical Rifle | <<locked>> | 92% | 46,499 psi | 88% | 2028 fps | 96.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 86% | 47,326 psi | 89% | 1808 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 90% | 45,136 psi | 85% | 2064 fps | 98.8% |
| SNPE Vectan SP 3 | <<locked>> | 92% | 45,527 psi | 86% | 2034 fps | 99.8% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 47,834 psi | 90% | 2021 fps | 99% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 38,247 psi | 72% | 1909 fps | 98.4% |
| Somchem S321 | <<locked>> | 96% | 45,832 psi | 87% | 2083 fps | 97.1% |
| Somchem S335ᴾ | <<locked>> | 100% | 45,963 psi | 87% | 2021 fps | 99.4% |
| Vihtavuori N120 | <<locked>> | 88% | 47,036 psi | 89% | 1975 fps | 100% |
| Vihtavuori N130 | <<locked>> | 94% | 45,005 psi | 85% | 1988 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 46,804 psi | 88% | 2021 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 38,841 psi | 73% | 1995 fps | 99.7% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 41,814 psi | 79% | 2008 fps | 98.6% |
| Vihtavuori N530 | <<locked>> | 98% | 45,905 psi | 87% | 2051 fps | 96.8% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 39,697 psi | 75% | 1995 fps | 97.7% |
| Winchester 748ᴾ | <<locked>> | 100% | 46,456 psi | 88% | 2116 fps | 97.8% |
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% | 40,930 psi | 77% | 1903 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 26,411 psi | 50% | 1726 fps | 96.8% |
| Accurate 2460 | <<locked>> | 84% | 32,140 psi | 61% | 1854 fps | 95.7% |
| Accurate 2495 | <<locked>> | 84% | 21,901 psi | 41% | 1699 fps | 95.4% |
| Accurate 2520 | <<locked>> | 88% | 31,531 psi | 60% | 1883 fps | 95% |
| Accurate 4064 | <<locked>> | 94% | 28,616 psi | 54% | 1857 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 35,520 psi | 67% | 1814 fps | 98% |
| Accurate LT-32 | <<locked>> | 80% | 35,926 psi | 68% | 1814 fps | 96.1% |
| ADI AR 2207 | <<locked>> | 80% | 36,825 psi | 70% | 1883 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 32,314 psi | 61% | 1860 fps | 97% |
| ADI Benchmark 8208 | <<locked>> | 94% | 40,495 psi | 76% | 1982 fps | 95.5% |
| Alliant AR-Comp | <<locked>> | 80% | 24,395 psi | 46% | 1732 fps | 98.3% |
| Alliant Power Pro 1200-R | <<locked>> | 92% | 42,699 psi | 81% | 2083 fps | 95.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 30,879 psi | 58% | 1818 fps | 99.1% |
| Alliant Reloder-7 | <<locked>> | 80% | 38,029 psi | 72% | 1883 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 33,025 psi | 62% | 1801 fps | 97.6% |
| Hodgdon Benchmark | <<locked>> | 90% | 38,899 psi | 73% | 1916 fps | 95.7% |
| Hodgdon BL-C2 | <<locked>> | 94% | 36,811 psi | 70% | 1982 fps | 95.2% |
| Hodgdon H322 | 19.4 gr | 80% | 29,921 psi | 57% | 1814 fps | 96.1% |
| Hodgdon H335 | <<locked>> | 82% | 31,633 psi | 60% | 1857 fps | 95.6% |
| Hodgdon H4198 | <<locked>> | 80% | 39,204 psi | 74% | 1877 fps | 98.3% |
| Hodgdon H4895 | <<locked>> | 98% | 42,525 psi | 80% | 2044 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,511 psi | 44% | 1076 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 26,629 psi | 50% | 1791 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 33,054 psi | 62% | 1811 fps | 99.8% |
| IMR 4227 | <<locked>> | 80% | 44,077 psi | 83% | 1913 fps | 100% |
| IMR 8208 XBR | <<locked>> | 94% | 40,495 psi | 76% | 1982 fps | 95.5% |
| Lovex D073.4 | <<locked>> | 80% | 34,664 psi | 65% | 1896 fps | 95.7% |
| Lovex D073.5 | <<locked>> | 88% | 36,535 psi | 69% | 1929 fps | 95.6% |
| Lovex D073.6 | <<locked>> | 92% | 32,140 psi | 61% | 1903 fps | 95.2% |
| Lovex S053 | <<locked>> | 80% | 43,584 psi | 82% | 1883 fps | 100% |
| Norma 200 | <<locked>> | 80% | 34,983 psi | 66% | 1877 fps | 99.9% |
| Norma 201 | <<locked>> | 96% | 38,798 psi | 73% | 1959 fps | 95.1% |
| Norma 202 | <<locked>> | 88% | 30,385 psi | 57% | 1837 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,757 psi | 45% | 1109 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 43,526 psi | 82% | 1942 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 35,404 psi | 67% | 1903 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 86% | 32,155 psi | 61% | 1834 fps | 95.6% |
| Rottweil R 902 | <<locked>> | 98% | 39,204 psi | 74% | 1959 fps | 95.2% |
| Shooters World AR Plus | <<locked>> | 80% | 34,664 psi | 65% | 1896 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 92% | 32,140 psi | 61% | 1903 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 90% | 43,511 psi | 82% | 1988 fps | 95.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 40,422 psi | 76% | 1732 fps | 100% |
| SNPE Vectan SP 10 | 20.7 gr | 80% | 32,503 psi | 61% | 1867 fps | 95.9% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 31,343 psi | 59% | 1814 fps | 97.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 31,343 psi | 59% | 1778 fps | 95.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 28,485 psi | 54% | 1739 fps | 95.4% |
| Somchem S321 | 23.5 gr | 90% | 37,884 psi | 72% | 1969 fps | 95.2% |
| Somchem S335 | <<locked>> | 84% | 28,514 psi | 54% | 1745 fps | 95.5% |
| Vihtavuori N120 | <<locked>> | 80% | 37,028 psi | 70% | 1850 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 29,675 psi | 56% | 1752 fps | 98.6% |
| Vihtavuori N133 | <<locked>> | 80% | 25,860 psi | 49% | 1683 fps | 96.2% |
| Vihtavuori N135 | <<locked>> | 82% | 22,785 psi | 43% | 1680 fps | 95.1% |
| Vihtavuori N140 | <<locked>> | 90% | 30,835 psi | 58% | 1827 fps | 95.7% |
| Vihtavuori N530 | <<locked>> | 94% | 40,219 psi | 76% | 1975 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 92% | 31,386 psi | 59% | 1854 fps | 95.3% |
| Winchester 748 | <<locked>> | 92% | 36,100 psi | 68% | 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 57 powders for 7 x 50 R loaded with the .285 | 173gr | Prvi Partizan SP. Alliant Power Pro 1200-R delivers the highest muzzle velocity at 2,123 fps; across all powders the maximum-charge window runs from 1,214 fps to 2,123 fps. Accurate 2495 gives the best case fill at 100 %, and 57 of the 57 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (365 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 173.0 gr projectile in 0.285" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 2520, Accurate 4064 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. Somchem S321, Hodgdon H322, SNPE Vectan SP 10 rank at the top here: for 7 x 50 R with the .285 | 173gr | Prvi Partizan SP they combine a high case fill with complete burn and sit in the upper velocity band. Hodgdon TrailBoss, ReloadSwiss RS 14 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.