Load Specifications
Load data in caliber 7 x 72 R with .284 | 173gr | RWS H-Mantel bullet and 23 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 Hodgdon Hybrid 100V.
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>> | 90% | 35,781 psi | 88% | 2270 fps | 96.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 36,724 psi | 90% | 2228 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 90% | 36,651 psi | 90% | 2283 fps | 97% |
| Alliant Reloder-17 | <<locked>> | 86% | 36,056 psi | 89% | 2303 fps | 98.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,998 psi | 86% | 2287 fps | 98% |
| Bofors RP3 | <<locked>> | 82% | 36,129 psi | 89% | 2231 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 35,491 psi | 87% | 2234 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,201 psi | 87% | 1470 fps | 100% |
| IMR 4831 | <<locked>> | 90% | 34,824 psi | 86% | 2234 fps | 96.5% |
| Norma URP | <<locked>> | 90% | 36,318 psi | 89% | 2270 fps | 96.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,708 psi | 88% | 1509 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 36,172 psi | 89% | 2313 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 35,737 psi | 88% | 2290 fps | 96.3% |
| Rottweil R 903 | <<locked>> | 84% | 36,347 psi | 90% | 2228 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 34,983 psi | 86% | 2228 fps | 97.6% |
| Somchem S355 | <<locked>> | 82% | 35,012 psi | 86% | 2188 fps | 98.1% |
| Somchem S365 | <<locked>> | 92% | 34,519 psi | 85% | 2277 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 84% | 35,520 psi | 87% | 2178 fps | 99.2% |
| Vihtavuori N160 | <<locked>> | 88% | 35,781 psi | 88% | 2228 fps | 96.4% |
| Vihtavuori N550 | <<locked>> | 88% | 35,085 psi | 86% | 2231 fps | 96% |
| Vihtavuori N555 | <<locked>> | 98% | 35,172 psi | 87% | 2306 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 35,911 psi | 88% | 2211 fps | 98.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,328 psi | 77% | 2274 fps | 97.4% |
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>> | 86% | 31,270 psi | 77% | 2175 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,461 psi | 85% | 2185 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 86% | 32,474 psi | 80% | 2188 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 29,646 psi | 73% | 2149 fps | 96.1% |
| Alliant Reloder-23 | <<locked>> | 94% | 29,283 psi | 72% | 2146 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 33,895 psi | 83% | 2188 fps | 98.4% |
| Hodgdon Hybrid 100V | 33.3 gr | 84% | 27,934 psi | 69% | 2057 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,063 psi | 64% | 1309 fps | 100% |
| IMR 4831 | <<locked>> | 88% | 32,677 psi | 80% | 2188 fps | 95.8% |
| Norma URP | <<locked>> | 86% | 32,082 psi | 79% | 2178 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,324 psi | 65% | 1342 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 31,546 psi | 78% | 2208 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 33,344 psi | 82% | 2238 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 31,966 psi | 79% | 2139 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,880 psi | 81% | 2182 fps | 96.9% |
| Somchem S355 | <<locked>> | 80% | 32,851 psi | 81% | 2146 fps | 97.6% |
| Somchem S365 | 33.4 gr | 82% | 25,396 psi | 63% | 2044 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 31,256 psi | 77% | 2093 fps | 98.3% |
| Vihtavuori N160 | <<locked>> | 86% | 33,620 psi | 83% | 2182 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 86% | 32,996 psi | 81% | 2185 fps | 95.3% |
| Vihtavuori N555 | 37.7 gr | 94% | 31,038 psi | 76% | 2211 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 27,818 psi | 69% | 2024 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 98% | 29,327 psi | 72% | 2215 fps | 96.1% |
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 46 powders for 7 x 72 R loaded with the .284 | 173gr | RWS H-Mantel. Alliant Reloder-26 delivers the highest muzzle velocity at 2,356 fps; across all powders the maximum-charge window runs from 1,470 fps to 2,356 fps. Accurate 3100 gives the best case fill at 100 %, and 46 of the 46 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 73–90 %, leaving at least 10 % headroom. The 173.0 gr projectile in 0.284" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-25 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, Hodgdon Hybrid 100V rank at the top here: for 7 x 72 R with the .284 | 173gr | RWS H-Mantel they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, Alliant Reloder-25, Bofors RP7 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.