Load Specifications
Load data in caliber 7 x 72 R with .284 | 175gr | A-Square MONO RN bullet and 21 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Winchester StaBALL HD and Alliant Reloder-23.
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>> | 86% | 36,738 psi | 90% | 2313 fps | 97.9% |
| Alliant Reloder-16 | <<locked>> | 86% | 36,463 psi | 90% | 2320 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 82% | 36,085 psi | 89% | 2339 fps | 99.2% |
| Alliant Reloder-23 | <<locked>> | 96% | 35,665 psi | 88% | 2336 fps | 99.1% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 35,737 psi | 88% | 2343 fps | 96.1% |
| Alliant Reloder-26 | <<locked>> | 94% | 36,579 psi | 90% | 2415 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 35,940 psi | 89% | 2274 fps | 99.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,824 psi | 88% | 1519 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 35,375 psi | 87% | 2270 fps | 97.6% |
| Lovex S065 | <<locked>> | 82% | 36,071 psi | 89% | 2221 fps | 96.2% |
| Norma URP | <<locked>> | 86% | 36,695 psi | 90% | 2306 fps | 97.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,361 psi | 90% | 1555 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 36,390 psi | 90% | 2329 fps | 97.5% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 36,143 psi | 89% | 2333 fps | 96.8% |
| Shooters World Long Rifle | <<locked>> | 82% | 36,071 psi | 89% | 2221 fps | 96.2% |
| Somchem S365 | <<locked>> | 88% | 35,230 psi | 87% | 2320 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 84% | 36,114 psi | 89% | 2264 fps | 97.5% |
| Vihtavuori N550 | <<locked>> | 84% | 35,433 psi | 87% | 2264 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 94% | 36,477 psi | 90% | 2356 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 35,723 psi | 88% | 2241 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 36,056 psi | 89% | 2448 fps | 99.9% |
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>> | 80% | 29,791 psi | 73% | 2162 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 30,501 psi | 75% | 2175 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,707 psi | 83% | 2283 fps | 98.7% |
| Alliant Reloder-23 | 38.6 gr | 86% | 26,339 psi | 65% | 2100 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 98% | 33,446 psi | 82% | 2287 fps | 95% |
| Alliant Reloder-26 | 44.4 gr | 90% | 31,865 psi | 78% | 2300 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,862 psi | 69% | 2087 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,716 psi | 66% | 1355 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 29,153 psi | 72% | 2129 fps | 95.3% |
| Lovex S065 | <<locked>> | 80% | 33,924 psi | 84% | 2172 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 30,284 psi | 75% | 2165 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,992 psi | 66% | 1385 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 29,689 psi | 73% | 2178 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 33,968 psi | 84% | 2283 fps | 95.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 33,924 psi | 84% | 2172 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 27,137 psi | 67% | 2123 fps | 97.8% |
| Vihtavuori N160 | <<locked>> | 80% | 31,575 psi | 78% | 2165 fps | 96% |
| Vihtavuori N550 | <<locked>> | 80% | 31,053 psi | 76% | 2165 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 86% | 28,224 psi | 70% | 2165 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,299 psi | 77% | 2146 fps | 98% |
| Winchester StaBALL HD | 42.7 gr | 90% | 26,397 psi | 65% | 2169 fps | 96% |
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 45 powders for 7 x 72 R loaded with the .284 | 175gr | A-Square MONO RN. Winchester StaBALL HD delivers the highest muzzle velocity at 2,448 fps; across all powders the maximum-charge window runs from 1,519 fps to 2,448 fps. Alliant Reloder-25 gives the best case fill at 100 %, and 45 of the 45 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 84–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.284" calls for a 1:16.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-25, Hodgdon TrailBoss, Lovex S071 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. Alliant Reloder-26, Winchester StaBALL HD, Alliant Reloder-23 rank at the top here: for 7 x 72 R with the .284 | 175gr | A-Square MONO RN they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2209, Alliant Reloder-19, Alliant Reloder-22 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.