Load Specifications
Load data in caliber 7 x 50 R with .284 | 140gr | Frontier BTSP bullet and 27 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 ReloadSwiss RS 36.
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% | 46,949 psi | 89% | 2152 fps | 99.2% |
| Accurate 2015ᴾ | <<locked>> | 100% | 35,215 psi | 67% | 2064 fps | 96.2% |
| Accurate LT-30 | <<locked>> | 98% | 47,108 psi | 89% | 2139 fps | 97.1% |
| ADI AR 2205 | <<locked>> | 82% | 44,918 psi | 85% | 2028 fps | 100% |
| ADI AR 2207 | <<locked>> | 98% | 47,297 psi | 89% | 2228 fps | 100% |
| ADI AR 2219ᴾ | <<locked>> | 100% | 46,630 psi | 88% | 2247 fps | 96.8% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 33,663 psi | 64% | 2083 fps | 97.9% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 41,234 psi | 78% | 2175 fps | 98.7% |
| Alliant Reloder-7 | <<locked>> | 96% | 47,210 psi | 89% | 2195 fps | 99.6% |
| Baschieri & Pellagri 106ᴾ | <<locked>> | 100% | 47,340 psi | 89% | 2172 fps | 97.4% |
| Hodgdon H4198 | <<locked>> | 94% | 46,644 psi | 88% | 2142 fps | 96.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 29,863 psi | 56% | 1293 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 44,991 psi | 85% | 2172 fps | 99.6% |
| IMR 4227 | <<locked>> | 90% | 47,050 psi | 89% | 2139 fps | 100% |
| Lovex D060 | <<locked>> | 82% | 45,063 psi | 85% | 2129 fps | 99.5% |
| Lovex S053 | <<locked>> | 92% | 47,761 psi | 90% | 2136 fps | 100% |
| Norma 200ᴾ | <<locked>> | 100% | 47,079 psi | 89% | 2244 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 29,167 psi | 55% | 1319 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 90% | 45,600 psi | 86% | 2162 fps | 100% |
| Shooters World Buffalo Rifle | <<locked>> | 82% | 45,063 psi | 85% | 2129 fps | 99.5% |
| Shooters World SOCOM | <<locked>> | 82% | 45,179 psi | 85% | 2113 fps | 99.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 94% | 46,296 psi | 87% | 1995 fps | 100% |
| SNPE Vectan SP 3ᴾ | <<locked>> | 100% | 43,366 psi | 82% | 2178 fps | 97.2% |
| Vihtavuori N110 | <<locked>> | 84% | 45,150 psi | 85% | 2034 fps | 100% |
| Vihtavuori N120 | <<locked>> | 98% | 47,514 psi | 90% | 2192 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 40,582 psi | 77% | 2106 fps | 98.2% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 35,418 psi | 67% | 2021 fps | 95.6% |
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% | 31,662 psi | 60% | 1913 fps | 96% |
| Accurate 2015 | <<locked>> | 98% | 33,228 psi | 63% | 2028 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 92% | 39,813 psi | 75% | 2034 fps | 95.4% |
| ADI AR 2205 | <<locked>> | 80% | 42,395 psi | 80% | 1995 fps | 100% |
| ADI AR 2207 | 16.4 gr | 80% | 27,296 psi | 52% | 1900 fps | 98.5% |
| ADI AR 2219 | <<locked>> | 96% | 41,017 psi | 77% | 2162 fps | 95.4% |
| Alliant AR-Comp | <<locked>> | 94% | 28,123 psi | 53% | 1959 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 88% | 28,616 psi | 54% | 1946 fps | 95.3% |
| Alliant Reloder-7 | <<locked>> | 80% | 29,138 psi | 55% | 1896 fps | 95.9% |
| Baschieri & Pellagri 106 | <<locked>> | 92% | 37,362 psi | 71% | 2024 fps | 95% |
| Hodgdon H4198 | <<locked>> | 90% | 41,118 psi | 78% | 2064 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 21,770 psi | 41% | 1152 fps | 100% |
| IMR 4198 | <<locked>> | 82% | 27,543 psi | 52% | 1854 fps | 95.4% |
| IMR 4227 | <<locked>> | 80% | 35,012 psi | 66% | 1959 fps | 99.1% |
| Lovex D060 | <<locked>> | 80% | 42,598 psi | 80% | 2093 fps | 99.2% |
| Lovex S053 | <<locked>> | 80% | 34,258 psi | 65% | 1942 fps | 100% |
| Norma 200 | 17.6 gr | 82% | 26,890 psi | 51% | 1900 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 21,379 psi | 40% | 1175 fps | 100% |
| ReloadSwiss RS 36 | 17.1 gr | 80% | 33,736 psi | 64% | 1978 fps | 98.8% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 42,598 psi | 80% | 2093 fps | 99.2% |
| Shooters World SOCOM | <<locked>> | 80% | 42,018 psi | 79% | 2067 fps | 99.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 32,169 psi | 61% | 1804 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 94% | 36,100 psi | 68% | 2057 fps | 95.2% |
| Vihtavuori N110 | <<locked>> | 80% | 40,553 psi | 77% | 1978 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 27,659 psi | 52% | 1880 fps | 99.3% |
| Vihtavuori N130 | <<locked>> | 90% | 30,110 psi | 57% | 1923 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 98% | 33,533 psi | 63% | 1985 fps | 95% |
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 27 powders for 7 x 50 R loaded with the .284 | 140gr | Frontier BTSP. ADI AR 2219 delivers the highest muzzle velocity at 2,247 fps; across all powders the maximum-charge window runs from 1,293 fps to 2,247 fps. Accurate 2015 gives the best case fill at 100 %, and 27 of the 27 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (365 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 140.0 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, ReloadSwiss RS 36 rank at the top here: for 7 x 50 R with the .284 | 140gr | Frontier BTSP they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.