Load Specifications
Load data in caliber 7 x 50 R with .284 | 170gr | Sierra RN Prohunter bullet and 55 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2219, Hodgdon H335 and Accurate 2460.
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% | 46,021 psi | 87% | 1982 fps | 100% |
| Accurate 2015ᴾ | <<locked>> | 100% | 47,863 psi | 90% | 2077 fps | 100% |
| Accurate 2460 | <<locked>> | 96% | 46,253 psi | 87% | 2083 fps | 98.6% |
| Accurate 2495ᴾ | <<locked>> | 100% | 35,694 psi | 67% | 1988 fps | 99.4% |
| Accurate 2520ᴾ | <<locked>> | 100% | 45,832 psi | 87% | 2113 fps | 98.3% |
| Accurate 4064ᴾ | <<locked>> | 100% | 33,330 psi | 63% | 1959 fps | 96.9% |
| Accurate LT-30 | <<locked>> | 90% | 46,557 psi | 88% | 1985 fps | 99.5% |
| Accurate LT-32 | <<locked>> | 90% | 47,094 psi | 89% | 1991 fps | 98.3% |
| ADI AR 2207 | <<locked>> | 88% | 46,180 psi | 87% | 2021 fps | 100% |
| ADI AR 2219 | <<locked>> | 92% | 46,514 psi | 88% | 2096 fps | 99.5% |
| ADI Benchmark 8208ᴾ | <<locked>> | 100% | 47,108 psi | 89% | 2087 fps | 96.7% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 43,874 psi | 83% | 2096 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 96% | 47,427 psi | 90% | 2162 fps | 96.4% |
| Alliant Reloder-10x | <<locked>> | 94% | 45,890 psi | 87% | 2060 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 88% | 47,384 psi | 90% | 2024 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 92% | 47,543 psi | 90% | 2021 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 96% | 45,121 psi | 85% | 2018 fps | 96.9% |
| Hodgdon BL-C2ᴾ | <<locked>> | 100% | 43,961 psi | 83% | 2103 fps | 96.8% |
| Hodgdon H322 | <<locked>> | 96% | 47,718 psi | 90% | 2110 fps | 99.6% |
| Hodgdon H335 | <<locked>> | 94% | 45,585 psi | 86% | 2093 fps | 98.7% |
| Hodgdon H4198 | <<locked>> | 86% | 45,818 psi | 87% | 1985 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,966 psi | 60% | 1217 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 41,785 psi | 79% | 2087 fps | 99.5% |
| IMR 4198 | <<locked>> | 94% | 47,703 psi | 90% | 2037 fps | 100% |
| IMR 4227 | <<locked>> | 82% | 45,977 psi | 87% | 1952 fps | 100% |
| IMR 8208 XBRᴾ | <<locked>> | 100% | 47,108 psi | 89% | 2087 fps | 96.7% |
| Lovex D073.4 | <<locked>> | 90% | 47,688 psi | 90% | 2100 fps | 98.3% |
| Lovex D073.5 | <<locked>> | 96% | 46,209 psi | 87% | 2080 fps | 97.5% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 40,698 psi | 77% | 2057 fps | 97.3% |
| Lovex S053 | <<locked>> | 84% | 47,761 psi | 90% | 1949 fps | 100% |
| Norma 200 | <<locked>> | 90% | 45,876 psi | 87% | 2044 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 42,975 psi | 81% | 2034 fps | 95.9% |
| Norma 202ᴾ | <<locked>> | 100% | 42,366 psi | 80% | 2051 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,039 psi | 61% | 1250 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 82% | 45,788 psi | 86% | 1985 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 96% | 47,601 psi | 90% | 2093 fps | 98.2% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 46,847 psi | 88% | 2077 fps | 98.7% |
| Shooters World AR Plus | <<locked>> | 90% | 47,688 psi | 90% | 2100 fps | 98.3% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 40,698 psi | 77% | 2057 fps | 97.3% |
| Shooters World Tactical Rifle | <<locked>> | 92% | 45,339 psi | 86% | 2024 fps | 95.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 86% | 46,760 psi | 88% | 1818 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 92% | 46,847 psi | 88% | 2100 fps | 98.8% |
| SNPE Vectan SP 3 | <<locked>> | 94% | 47,282 psi | 89% | 2070 fps | 99.8% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 46,673 psi | 88% | 2021 fps | 98.7% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 37,347 psi | 71% | 1909 fps | 97.9% |
| Somchem S321 | <<locked>> | 98% | 47,718 psi | 90% | 2119 fps | 97.2% |
| Somchem S335ᴾ | <<locked>> | 100% | 44,846 psi | 85% | 2024 fps | 99.1% |
| Vihtavuori N120 | <<locked>> | 88% | 46,340 psi | 88% | 1985 fps | 100% |
| Vihtavuori N130 | <<locked>> | 96% | 46,804 psi | 88% | 2024 fps | 100% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 45,658 psi | 86% | 2021 fps | 99.9% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 37,724 psi | 71% | 1991 fps | 99.5% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 40,741 psi | 77% | 2005 fps | 98.2% |
| Vihtavuori N530ᴾ | <<locked>> | 100% | 47,877 psi | 90% | 2090 fps | 96.9% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 38,725 psi | 73% | 1991 fps | 97.2% |
| Winchester 748ᴾ | <<locked>> | 100% | 45,324 psi | 86% | 2113 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% | 40,480 psi | 76% | 1909 fps | 99.9% |
| Accurate 2015 | <<locked>> | 80% | 25,904 psi | 49% | 1729 fps | 96.3% |
| Accurate 2460 | 21.2 gr | 84% | 31,169 psi | 59% | 1850 fps | 95% |
| Accurate 2495 | <<locked>> | 86% | 22,539 psi | 43% | 1729 fps | 95.5% |
| Accurate 2520 | <<locked>> | 90% | 32,663 psi | 62% | 1916 fps | 95% |
| Accurate 4064 | <<locked>> | 96% | 29,559 psi | 56% | 1890 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 80% | 34,621 psi | 65% | 1811 fps | 97.5% |
| Accurate LT-32 | <<locked>> | 80% | 35,027 psi | 66% | 1811 fps | 95.5% |
| ADI AR 2207 | <<locked>> | 80% | 36,172 psi | 68% | 1890 fps | 100% |
| ADI AR 2219 | 19.8 gr | 80% | 31,430 psi | 59% | 1857 fps | 96.4% |
| ADI Benchmark 8208 | <<locked>> | 96% | 42,003 psi | 79% | 2018 fps | 95.5% |
| Alliant AR-Comp | <<locked>> | 80% | 24,018 psi | 45% | 1736 fps | 97.9% |
| Alliant Power Pro 1200-R | <<locked>> | 94% | 44,324 psi | 84% | 2119 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 29,907 psi | 56% | 1814 fps | 98.7% |
| Alliant Reloder-7 | <<locked>> | 80% | 37,492 psi | 71% | 1890 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 32,590 psi | 62% | 1804 fps | 97.2% |
| Hodgdon Benchmark | <<locked>> | 90% | 37,913 psi | 72% | 1913 fps | 95% |
| Hodgdon BL-C2 | <<locked>> | 96% | 38,653 psi | 73% | 2024 fps | 95.4% |
| Hodgdon H322 | <<locked>> | 80% | 29,080 psi | 55% | 1808 fps | 95.4% |
| Hodgdon H335 | 21.6 gr | 84% | 33,199 psi | 63% | 1900 fps | 95.8% |
| Hodgdon H4198 | <<locked>> | 80% | 38,189 psi | 72% | 1873 fps | 97.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,641 psi | 45% | 1086 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 27,615 psi | 52% | 1824 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 32,111 psi | 61% | 1808 fps | 99.6% |
| IMR 4227 | <<locked>> | 80% | 43,526 psi | 82% | 1923 fps | 100% |
| IMR 8208 XBR | <<locked>> | 96% | 42,003 psi | 79% | 2018 fps | 95.5% |
| Lovex D073.4 | <<locked>> | 80% | 33,576 psi | 63% | 1890 fps | 95% |
| Lovex D073.5 | <<locked>> | 90% | 37,869 psi | 72% | 1965 fps | 95.6% |
| Lovex D073.6 | <<locked>> | 94% | 33,286 psi | 63% | 1936 fps | 95.2% |
| Lovex S053 | <<locked>> | 80% | 42,395 psi | 80% | 1886 fps | 100% |
| Norma 200 | <<locked>> | 80% | 33,953 psi | 64% | 1873 fps | 99.7% |
| Norma 201 | <<locked>> | 98% | 40,277 psi | 76% | 1995 fps | 95.2% |
| Norma 202 | <<locked>> | 90% | 31,444 psi | 59% | 1870 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,395 psi | 44% | 1112 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 42,902 psi | 81% | 1949 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 34,882 psi | 66% | 1906 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 86% | 31,256 psi | 59% | 1831 fps | 95% |
| Shooters World AR Plus | <<locked>> | 80% | 33,576 psi | 63% | 1890 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 94% | 33,286 psi | 63% | 1936 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 90% | 42,482 psi | 80% | 1985 fps | 95% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 39,871 psi | 75% | 1739 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 31,546 psi | 60% | 1860 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 30,864 psi | 58% | 1818 fps | 97.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 32,590 psi | 62% | 1811 fps | 95.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 29,573 psi | 56% | 1772 fps | 95.5% |
| Somchem S321 | <<locked>> | 92% | 39,291 psi | 74% | 2001 fps | 95.2% |
| Somchem S335 | <<locked>> | 86% | 29,559 psi | 56% | 1781 fps | 95.5% |
| Vihtavuori N120 | <<locked>> | 80% | 36,390 psi | 69% | 1860 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 29,167 psi | 55% | 1755 fps | 98.2% |
| Vihtavuori N133 | <<locked>> | 80% | 25,440 psi | 48% | 1686 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 84% | 23,569 psi | 45% | 1709 fps | 95.2% |
| Vihtavuori N140 | <<locked>> | 90% | 30,052 psi | 57% | 1821 fps | 95% |
| Vihtavuori N530 | <<locked>> | 96% | 41,843 psi | 79% | 2011 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 94% | 32,503 psi | 61% | 1886 fps | 95.3% |
| Winchester 748 | <<locked>> | 94% | 37,492 psi | 71% | 1991 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 86 powders for 7 x 50 R loaded with the .284 | 170gr | Sierra RN Prohunter. Alliant Power Pro 1200-R delivers the highest muzzle velocity at 2,162 fps; across all powders the maximum-charge window runs from 1,217 fps to 2,162 fps. Accurate 2015 gives the best case fill at 100 %, and 86 of the 86 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 170.0 gr projectile in 0.284" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 2015, Accurate 2495, Accurate 2520 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 2219, Hodgdon H335, Accurate 2460 rank at the top here: for 7 x 50 R with the .284 | 170gr | Sierra RN Prohunter they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2200, Accurate 2230, ADI AR 2206H burn incompletely and react more sensitively to barrel length and temperature. 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.