Load Specifications
Load data in caliber 7 x 50 R with .284 | 148gr | TWENTY-NINE ERTP bullet and 29 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2207, Norma 200 and Alliant Reloder-7.
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% | 47,834 psi | 90% | 2093 fps | 99.5% |
| Accurate 2015ᴾ | <<locked>> | 100% | 36,709 psi | 69% | 2021 fps | 97.1% |
| Accurate LT-30 | <<locked>> | 96% | 45,832 psi | 87% | 2054 fps | 97.4% |
| ADI AR 2205 | <<locked>> | 82% | 46,296 psi | 87% | 1975 fps | 100% |
| ADI AR 2207 | <<locked>> | 96% | 46,064 psi | 87% | 2136 fps | 100% |
| ADI AR 2219ᴾ | <<locked>> | 100% | 47,805 psi | 90% | 2192 fps | 97.5% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 34,403 psi | 65% | 2034 fps | 98.6% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 42,801 psi | 81% | 2126 fps | 99.2% |
| Alliant Reloder-7 | <<locked>> | 94% | 46,079 psi | 87% | 2106 fps | 99.7% |
| Baschieri & Pellagri 106 | <<locked>> | 98% | 46,064 psi | 87% | 2087 fps | 97.7% |
| Hodgdon H322ᴾ | <<locked>> | 100% | 43,149 psi | 82% | 2129 fps | 96.6% |
| Hodgdon H4198 | <<locked>> | 92% | 44,657 psi | 84% | 2047 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 29,878 psi | 56% | 1243 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 46,296 psi | 87% | 2116 fps | 99.8% |
| IMR 4227 | <<locked>> | 88% | 45,324 psi | 86% | 2044 fps | 100% |
| Lovex D060 | <<locked>> | 82% | 46,427 psi | 88% | 2077 fps | 99.8% |
| Lovex S053 | <<locked>> | 90% | 46,746 psi | 88% | 2047 fps | 100% |
| Norma 200 | <<locked>> | 98% | 45,614 psi | 86% | 2149 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 29,805 psi | 56% | 1280 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 90% | 46,833 psi | 88% | 2103 fps | 100% |
| Shooters World Buffalo Rifle | <<locked>> | 82% | 46,427 psi | 88% | 2077 fps | 99.8% |
| Shooters World SOCOM | <<locked>> | 82% | 46,296 psi | 87% | 2054 fps | 99.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 94% | 47,848 psi | 90% | 1939 fps | 100% |
| SNPE Vectan SP 10ᴾ | <<locked>> | 100% | 47,732 psi | 90% | 2198 fps | 96.5% |
| SNPE Vectan SP 3ᴾ | <<locked>> | 100% | 44,222 psi | 84% | 2119 fps | 97.8% |
| Vihtavuori N110 | <<locked>> | 84% | 46,572 psi | 88% | 1978 fps | 100% |
| Vihtavuori N120 | <<locked>> | 96% | 46,296 psi | 87% | 2100 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 41,510 psi | 78% | 2051 fps | 98.7% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 36,114 psi | 68% | 1969 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>> | 80% | 32,430 psi | 61% | 1864 fps | 96.8% |
| Accurate 2015 | <<locked>> | 94% | 30,168 psi | 57% | 1906 fps | 95% |
| Accurate LT-30 | <<locked>> | 90% | 38,058 psi | 72% | 1942 fps | 95.5% |
| ADI AR 2205 | <<locked>> | 80% | 43,642 psi | 82% | 1942 fps | 100% |
| ADI AR 2207 | 16.1 gr | 80% | 28,384 psi | 54% | 1857 fps | 99.1% |
| ADI AR 2219 | <<locked>> | 94% | 39,581 psi | 75% | 2073 fps | 95.6% |
| Alliant AR-Comp | <<locked>> | 90% | 25,585 psi | 48% | 1837 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 86% | 27,818 psi | 53% | 1864 fps | 95.6% |
| Alliant Reloder-7 | 16.6 gr | 80% | 29,791 psi | 56% | 1844 fps | 96.7% |
| Baschieri & Pellagri 106 | <<locked>> | 90% | 35,723 psi | 67% | 1932 fps | 95.2% |
| Hodgdon H322 | <<locked>> | 96% | 37,927 psi | 72% | 2047 fps | 95.1% |
| Hodgdon H4198 | <<locked>> | 88% | 39,827 psi | 75% | 1975 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 22,104 psi | 42% | 1112 fps | 100% |
| IMR 4198 | <<locked>> | 80% | 26,397 psi | 50% | 1765 fps | 95.5% |
| IMR 4227 | <<locked>> | 80% | 35,607 psi | 67% | 1903 fps | 99.5% |
| Lovex D060 | <<locked>> | 80% | 43,772 psi | 83% | 2041 fps | 99.6% |
| Lovex S053 | <<locked>> | 80% | 34,838 psi | 66% | 1883 fps | 100% |
| Norma 200 | 16.8 gr | 80% | 26,136 psi | 49% | 1818 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 21,741 psi | 41% | 1138 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 34,490 psi | 65% | 1926 fps | 99.3% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 43,772 psi | 83% | 2041 fps | 99.6% |
| Shooters World SOCOM | <<locked>> | 80% | 43,047 psi | 81% | 2011 fps | 99.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 32,996 psi | 62% | 1752 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 96% | 41,974 psi | 79% | 2116 fps | 95.1% |
| SNPE Vectan SP 3 | <<locked>> | 92% | 35,070 psi | 66% | 1975 fps | 95.5% |
| Vihtavuori N110 | <<locked>> | 80% | 41,031 psi | 78% | 1913 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 28,718 psi | 54% | 1837 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 88% | 29,225 psi | 55% | 1844 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 96% | 32,256 psi | 61% | 1900 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 29 powders for 7 x 50 R loaded with the .284 | 148gr | TWENTY-NINE ERTP. SNPE Vectan SP 10 delivers the highest muzzle velocity at 2,198 fps; across all powders the maximum-charge window runs from 1,243 fps to 2,198 fps. Accurate 2015 gives the best case fill at 100 %, and 29 of the 29 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (365 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 148.0 gr projectile in 0.284" calls for a 1:9.0 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, Norma 200, Alliant Reloder-7 rank at the top here: for 7 x 50 R with the .284 | 148gr | TWENTY-NINE ERTP 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.