Load Specifications
Load data in caliber 7 x 72 R with .284 | 145gr | Prvi Partizan SP bullet and 20 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, Winchester 6.5 StaBALL and Vihtavuori N150.
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% | 34,766 psi | 86% | 2415 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 36,114 psi | 89% | 2448 fps | 97.4% |
| Alliant Reloder-17 | <<locked>> | 88% | 35,766 psi | 88% | 2516 fps | 96.6% |
| Bofors RP3 | <<locked>> | 84% | 35,462 psi | 87% | 2448 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 34,998 psi | 86% | 2441 fps | 96.4% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 35,041 psi | 86% | 2457 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,838 psi | 86% | 1637 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 36,347 psi | 90% | 2405 fps | 95.9% |
| Lovex S062 | <<locked>> | 82% | 36,318 psi | 89% | 2418 fps | 97.8% |
| Norma 203B | <<locked>> | 82% | 36,129 psi | 89% | 2451 fps | 96.5% |
| Ramshot Big Game | <<locked>> | 82% | 35,476 psi | 87% | 2454 fps | 95.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,882 psi | 86% | 1673 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 35,752 psi | 88% | 2530 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 86% | 35,607 psi | 88% | 2441 fps | 97.1% |
| Shooters World Precision | <<locked>> | 82% | 36,318 psi | 89% | 2418 fps | 97.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 36,579 psi | 90% | 2362 fps | 99.9% |
| Somchem S355 | <<locked>> | 84% | 34,418 psi | 85% | 2398 fps | 96.4% |
| Somchem S365 | <<locked>> | 96% | 36,158 psi | 89% | 2533 fps | 98.3% |
| Vihtavuori N150 | <<locked>> | 90% | 35,244 psi | 87% | 2402 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 35,839 psi | 88% | 2418 fps | 96.7% |
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% | 32,518 psi | 80% | 2365 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,836 psi | 78% | 2349 fps | 96% |
| Alliant Reloder-17 | <<locked>> | 86% | 33,533 psi | 83% | 2461 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 31,169 psi | 77% | 2346 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 33,054 psi | 81% | 2392 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 32,590 psi | 80% | 2398 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,817 psi | 64% | 1460 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 34,229 psi | 84% | 2359 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 34,026 psi | 84% | 2369 fps | 97.2% |
| Norma 203B | <<locked>> | 80% | 33,823 psi | 83% | 2395 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 33,286 psi | 82% | 2402 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,947 psi | 64% | 1496 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 29,370 psi | 72% | 2356 fps | 96.5% |
| Rottweil R 903 | <<locked>> | 82% | 31,343 psi | 77% | 2343 fps | 95.6% |
| Shooters World Precision | <<locked>> | 80% | 34,026 psi | 84% | 2369 fps | 97.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,460 psi | 80% | 2277 fps | 99.4% |
| Somchem S355 | <<locked>> | 82% | 32,460 psi | 80% | 2352 fps | 95.7% |
| Somchem S365 | 38.6 gr | 88% | 28,181 psi | 69% | 2326 fps | 95% |
| Vihtavuori N150 | 34.1 gr | 82% | 27,528 psi | 68% | 2215 fps | 95.3% |
| Winchester 6.5 StaBALL | 41.8 gr | 88% | 33,721 psi | 83% | 2369 fps | 95.9% |
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 20 powders for 7 x 72 R loaded with the .284 | 145gr | Prvi Partizan SP. Somchem S365 delivers the highest muzzle velocity at 2,533 fps; across all powders the maximum-charge window runs from 1,637 fps to 2,533 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 20 of the 20 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 85–90 %, leaving at least 10 % headroom. The 145.0 gr projectile in 0.284" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. 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, Winchester 6.5 StaBALL, Vihtavuori N150 rank at the top here: for 7 x 72 R with the .284 | 145gr | Prvi Partizan 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.