Load Specifications
Load data in caliber 7 x 72 R with .284 | 140gr | Prvi Partizan PSP BT bullet and 24 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, Vihtavuori N150 and ReloadSwiss RS 14.
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 2495 | <<locked>> | 82% | 34,896 psi | 86% | 2434 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 35,273 psi | 87% | 2467 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 34,650 psi | 85% | 2451 fps | 96.5% |
| Alliant Reloder-17 | <<locked>> | 90% | 36,550 psi | 90% | 2566 fps | 96.2% |
| Bofors RP3 | <<locked>> | 86% | 36,100 psi | 89% | 2497 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 35,549 psi | 88% | 2484 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 35,476 psi | 87% | 2500 fps | 96.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,577 psi | 85% | 1657 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 35,288 psi | 87% | 2431 fps | 96.1% |
| IMR 3031 | <<locked>> | 82% | 35,215 psi | 87% | 2484 fps | 99.9% |
| IMR 4895 | <<locked>> | 82% | 35,911 psi | 88% | 2487 fps | 95.9% |
| Lovex S062 | <<locked>> | 82% | 34,679 psi | 85% | 2418 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,896 psi | 86% | 1699 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 36,579 psi | 90% | 2579 fps | 98.6% |
| Rottweil R 902 | <<locked>> | 82% | 36,637 psi | 90% | 2438 fps | 97.4% |
| Rottweil R 903 | <<locked>> | 88% | 36,245 psi | 89% | 2493 fps | 96.8% |
| Shooters World Precision | <<locked>> | 82% | 34,679 psi | 85% | 2418 fps | 96.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 35,273 psi | 87% | 2372 fps | 99.6% |
| Somchem S355 | <<locked>> | 86% | 35,070 psi | 86% | 2451 fps | 96.1% |
| Somchem S365 | <<locked>> | 98% | 36,651 psi | 90% | 2579 fps | 97.9% |
| Vihtavuori N135 | <<locked>> | 82% | 35,549 psi | 88% | 2438 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 35,984 psi | 89% | 2431 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 92% | 35,926 psi | 88% | 2451 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 82% | 35,650 psi | 88% | 2448 fps | 99% |
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 2495 | <<locked>> | 80% | 32,822 psi | 81% | 2388 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 31,053 psi | 76% | 2369 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 32,358 psi | 80% | 2398 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 88% | 34,301 psi | 84% | 2510 fps | 95.3% |
| Bofors RP3 | <<locked>> | 82% | 31,691 psi | 78% | 2395 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 33,533 psi | 83% | 2434 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,243 psi | 82% | 2448 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,483 psi | 63% | 1476 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 33,272 psi | 82% | 2382 fps | 95.4% |
| IMR 3031 | <<locked>> | 80% | 33,069 psi | 81% | 2434 fps | 99.7% |
| IMR 4895 | <<locked>> | 80% | 33,591 psi | 83% | 2434 fps | 95% |
| Lovex S062 | <<locked>> | 80% | 32,706 psi | 81% | 2372 fps | 96.2% |
| ReloadSwiss RS 14 | 12 gr | 80% | 25,889 psi | 64% | 1516 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 29,994 psi | 74% | 2402 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 34,548 psi | 85% | 2392 fps | 96.8% |
| Rottweil R 903 | <<locked>> | 84% | 31,850 psi | 78% | 2392 fps | 95.2% |
| Shooters World Precision | <<locked>> | 80% | 32,706 psi | 81% | 2372 fps | 96.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,995 psi | 76% | 2277 fps | 98.8% |
| Somchem S355 | <<locked>> | 84% | 33,069 psi | 81% | 2402 fps | 95.4% |
| Somchem S365 | 39.8 gr | 92% | 30,400 psi | 75% | 2418 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 33,156 psi | 82% | 2388 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 33,634 psi | 83% | 2382 fps | 99% |
| Vihtavuori N150 | 35.3 gr | 86% | 29,776 psi | 73% | 2306 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 33,402 psi | 82% | 2398 fps | 98.6% |
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 46 powders for 7 x 72 R loaded with the .284 | 140gr | Prvi Partizan PSP BT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,579 fps; across all powders the maximum-charge window runs from 1,657 fps to 2,579 fps. Alliant Reloder-23 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 77–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:12.0 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 N150, ReloadSwiss RS 14 rank at the top here: for 7 x 72 R with the .284 | 140gr | Prvi Partizan PSP BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 4350, ADI AR 2208, Alliant Power Pro 2000-MR 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.