Load Specifications
Load data in caliber 7 x 72 R with .284 | 175gr | Hornady SP bullet and 21 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, Vihtavuori N555 and Alliant Reloder-16.
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: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 4350 | <<locked>> | 88% | 34,650 psi | 85% | 2241 fps | 96.7% |
| Alliant Reloder-16 | <<locked>> | 88% | 35,476 psi | 87% | 2257 fps | 97% |
| Alliant Reloder-17 | <<locked>> | 84% | 34,925 psi | 86% | 2277 fps | 98.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,376 psi | 90% | 2313 fps | 98.7% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 34,606 psi | 85% | 2211 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,404 psi | 87% | 1473 fps | 100% |
| IMR 4831 | <<locked>> | 90% | 35,940 psi | 89% | 2251 fps | 97.1% |
| Norma URP | <<locked>> | 88% | 35,172 psi | 87% | 2244 fps | 96.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,592 psi | 88% | 1506 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 34,780 psi | 86% | 2280 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 34,635 psi | 85% | 2260 fps | 96.3% |
| Rottweil R 903 | <<locked>> | 82% | 35,302 psi | 87% | 2201 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 36,318 psi | 89% | 2247 fps | 98.2% |
| Somchem S355 | <<locked>> | 82% | 36,158 psi | 89% | 2205 fps | 98.6% |
| Somchem S365 | <<locked>> | 92% | 35,781 psi | 88% | 2297 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 84% | 36,680 psi | 90% | 2195 fps | 99.5% |
| Vihtavuori N160 | <<locked>> | 86% | 34,664 psi | 85% | 2198 fps | 96.4% |
| Vihtavuori N550 | <<locked>> | 88% | 36,172 psi | 89% | 2247 fps | 96.7% |
| Vihtavuori N555 | <<locked>> | 98% | 36,550 psi | 90% | 2326 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 34,664 psi | 85% | 2182 fps | 98.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,256 psi | 79% | 2303 fps | 98.3% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 4350 | <<locked>> | 84% | 30,414 psi | 75% | 2149 fps | 95.2% |
| Alliant Reloder-16 | 34.2 gr | 84% | 31,502 psi | 78% | 2162 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 30,545 psi | 75% | 2172 fps | 96.9% |
| Alliant Reloder-23 | <<locked>> | 92% | 28,572 psi | 70% | 2126 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 26,905 psi | 66% | 2028 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,411 psi | 65% | 1316 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 31,734 psi | 78% | 2162 fps | 95.7% |
| Norma URP | <<locked>> | 84% | 31,154 psi | 77% | 2152 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,672 psi | 66% | 1348 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 32,503 psi | 80% | 2228 fps | 99.5% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 32,343 psi | 80% | 2208 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 32,866 psi | 81% | 2152 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,939 psi | 84% | 2198 fps | 97.5% |
| Somchem S355 | <<locked>> | 80% | 34,011 psi | 84% | 2162 fps | 98.1% |
| Somchem S365 | 33.2 gr | 80% | 24,540 psi | 60% | 2014 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 32,126 psi | 79% | 2106 fps | 98.7% |
| Vihtavuori N160 | <<locked>> | 84% | 32,619 psi | 80% | 2156 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 84% | 31,763 psi | 78% | 2156 fps | 95.1% |
| Vihtavuori N555 | 37.7 gr | 92% | 30,356 psi | 75% | 2192 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,558 psi | 70% | 2041 fps | 96.1% |
| Winchester StaBALL HD | <<locked>> | 96% | 28,529 psi | 70% | 2192 fps | 96.2% |
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 21 powders for 7 x 72 R loaded with the .284 | 175gr | Hornady SP. Vihtavuori N555 delivers the highest muzzle velocity at 2,326 fps; across all powders the maximum-charge window runs from 1,473 fps to 2,326 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 21 of the 21 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 79–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Hodgdon TrailBoss, ReloadSwiss RS 14 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 S365, Vihtavuori N555, Alliant Reloder-16 rank at the top here: for 7 x 72 R with the .284 | 175gr | Hornady SP 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.