Load Specifications
Load data in caliber 7 x 72 R with .284 | 175gr | Nosler Partition bullet and 25 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 IMR 4831.
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% | 35,824 psi | 88% | 2257 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 36,709 psi | 90% | 2215 fps | 98.9% |
| Alliant Reloder-16 | <<locked>> | 90% | 36,651 psi | 90% | 2270 fps | 97.1% |
| Alliant Reloder-17 | <<locked>> | 86% | 36,114 psi | 89% | 2290 fps | 98.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,070 psi | 86% | 2270 fps | 98.1% |
| Alliant Reloder-26 | <<locked>> | 98% | 36,143 psi | 89% | 2346 fps | 96.1% |
| Bofors RP3 | <<locked>> | 82% | 36,129 psi | 89% | 2218 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 35,534 psi | 88% | 2218 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,230 psi | 87% | 1460 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 36,593 psi | 90% | 2172 fps | 97.7% |
| IMR 4831 | <<locked>> | 94% | 35,404 psi | 87% | 2231 fps | 96.8% |
| Norma URP | <<locked>> | 90% | 36,390 psi | 90% | 2257 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,433 psi | 87% | 1493 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 36,187 psi | 89% | 2300 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 35,839 psi | 88% | 2274 fps | 96.4% |
| Rottweil R 903 | <<locked>> | 84% | 36,303 psi | 89% | 2215 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 35,244 psi | 87% | 2218 fps | 97.7% |
| Somchem S355 | <<locked>> | 82% | 35,244 psi | 87% | 2178 fps | 98.3% |
| Somchem S365 | <<locked>> | 92% | 34,563 psi | 85% | 2260 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 88% | 36,013 psi | 89% | 2175 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 86% | 35,027 psi | 86% | 2192 fps | 96.2% |
| Vihtavuori N550 | <<locked>> | 86% | 35,462 psi | 87% | 2234 fps | 96.4% |
| Vihtavuori N555 | <<locked>> | 98% | 35,244 psi | 87% | 2290 fps | 97.4% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 35,955 psi | 89% | 2195 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,256 psi | 77% | 2257 fps | 97.5% |
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% | 31,314 psi | 77% | 2162 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,461 psi | 85% | 2169 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 86% | 32,489 psi | 80% | 2175 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 29,849 psi | 74% | 2142 fps | 96.3% |
| Alliant Reloder-23 | <<locked>> | 94% | 29,341 psi | 72% | 2133 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 33,765 psi | 83% | 2290 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 33,866 psi | 83% | 2172 fps | 98.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 27,891 psi | 69% | 2044 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,034 psi | 64% | 1299 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 34,621 psi | 85% | 2133 fps | 97.2% |
| IMR 4831 | 35 gr | 90% | 31,444 psi | 77% | 2146 fps | 95.4% |
| Norma URP | <<locked>> | 86% | 32,111 psi | 79% | 2165 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,600 psi | 66% | 1335 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 31,763 psi | 78% | 2198 fps | 99.2% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 33,417 psi | 82% | 2224 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 31,908 psi | 79% | 2123 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 32,866 psi | 81% | 2165 fps | 97% |
| Somchem S355 | <<locked>> | 80% | 33,040 psi | 81% | 2133 fps | 97.7% |
| Somchem S365 | 33.1 gr | 82% | 25,367 psi | 62% | 2031 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 80% | 28,050 psi | 69% | 2008 fps | 97.4% |
| Vihtavuori N160 | <<locked>> | 84% | 32,880 psi | 81% | 2146 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 84% | 33,025 psi | 81% | 2185 fps | 95.5% |
| Vihtavuori N555 | 36.6 gr | 92% | 29,211 psi | 72% | 2152 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 27,818 psi | 69% | 2011 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 96% | 27,572 psi | 68% | 2146 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 25 powders for 7 x 72 R loaded with the .284 | 175gr | Nosler Partition. Alliant Reloder-26 delivers the highest muzzle velocity at 2,346 fps; across all powders the maximum-charge window runs from 1,460 fps to 2,346 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 25 of the 25 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 77–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.284" calls for a 1:10.5 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, IMR 4831 rank at the top here: for 7 x 72 R with the .284 | 175gr | Nosler Partition 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.