Load Specifications
Load data in caliber 7 x 72 R with .284 | 160gr | Prvi Partizan PSP BT bullet and 22 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, Hodgdon Hybrid 100V and Winchester 6.5 StaBALL.
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 4064 | <<locked>> | 82% | 36,318 psi | 89% | 2316 fps | 99.9% |
| Accurate 4350 | <<locked>> | 92% | 36,463 psi | 90% | 2382 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 82% | 36,114 psi | 89% | 2280 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 35,186 psi | 87% | 2297 fps | 97.9% |
| Alliant Reloder-17 | <<locked>> | 86% | 34,809 psi | 86% | 2369 fps | 97.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 33,736 psi | 83% | 2346 fps | 96.7% |
| Bofors RP3 | <<locked>> | 82% | 34,708 psi | 85% | 2300 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 36,376 psi | 90% | 2346 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 36,332 psi | 89% | 2356 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,998 psi | 86% | 1539 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 35,360 psi | 87% | 2257 fps | 96.5% |
| IMR 4831 | <<locked>> | 96% | 36,114 psi | 89% | 2356 fps | 96.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,447 psi | 87% | 1578 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 34,751 psi | 86% | 2379 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 84% | 34,882 psi | 86% | 2297 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 35,984 psi | 89% | 2343 fps | 97.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 35,578 psi | 88% | 2211 fps | 100% |
| Somchem S355 | <<locked>> | 84% | 35,911 psi | 88% | 2303 fps | 97.7% |
| Somchem S365 | <<locked>> | 94% | 35,186 psi | 87% | 2385 fps | 98.8% |
| Vihtavuori N150 | <<locked>> | 90% | 36,608 psi | 90% | 2300 fps | 99% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 35,824 psi | 88% | 2415 fps | 96.7% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 34,882 psi | 86% | 2277 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 4064 | <<locked>> | 80% | 33,866 psi | 83% | 2264 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 34,156 psi | 84% | 2333 fps | 95.4% |
| ADI AR 2208 | <<locked>> | 80% | 33,997 psi | 84% | 2234 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,069 psi | 81% | 2251 fps | 97.3% |
| Alliant Reloder-17 | <<locked>> | 82% | 30,516 psi | 75% | 2260 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 31,633 psi | 78% | 2293 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 32,329 psi | 80% | 2251 fps | 97.3% |
| Hodgdon Hybrid 100V | 35.8 gr | 88% | 30,168 psi | 74% | 2201 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,939 psi | 84% | 2303 fps | 97.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,846 psi | 64% | 1371 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 33,257 psi | 82% | 2211 fps | 95.8% |
| IMR 4831 | <<locked>> | 94% | 33,953 psi | 84% | 2310 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,339 psi | 65% | 1411 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 30,443 psi | 75% | 2270 fps | 98.1% |
| Rottweil R 903 | <<locked>> | 80% | 30,530 psi | 75% | 2201 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 31,705 psi | 78% | 2244 fps | 95.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,402 psi | 82% | 2172 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 31,531 psi | 78% | 2208 fps | 96.3% |
| Somchem S365 | 36 gr | 86% | 27,514 psi | 68% | 2192 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 80% | 27,006 psi | 67% | 2083 fps | 96.1% |
| Vihtavuori N555 | <<locked>> | 96% | 31,517 psi | 78% | 2316 fps | 95% |
| Winchester 6.5 StaBALL | 38 gr | 84% | 30,458 psi | 75% | 2175 fps | 95.6% |
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 22 powders for 7 x 72 R loaded with the .284 | 160gr | Prvi Partizan PSP BT. Vihtavuori N555 delivers the highest muzzle velocity at 2,415 fps; across all powders the maximum-charge window runs from 1,539 fps to 2,415 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 22 of the 22 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 83–90 %, leaving at least 10 % headroom. The 160.0 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, Hodgdon Hybrid 100V, Winchester 6.5 StaBALL rank at the top here: for 7 x 72 R with the .284 | 160gr | Prvi Partizan PSP BT 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.