Load Specifications
Load data in caliber 7 x 72 R with .284 | 140gr | Nosler CT FailSafe bullet and 16 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 4064 | <<locked>> | 82% | 36,593 psi | 90% | 2474 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 35,099 psi | 86% | 2448 fps | 96.6% |
| Alliant Reloder-17 | <<locked>> | 88% | 36,695 psi | 90% | 2559 fps | 96.3% |
| Bofors RP3 | <<locked>> | 82% | 34,708 psi | 85% | 2451 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 35,926 psi | 88% | 2480 fps | 96.1% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 35,911 psi | 88% | 2516 fps | 97% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,940 psi | 86% | 1660 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 35,766 psi | 88% | 2444 fps | 96.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,389 psi | 87% | 1703 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 36,724 psi | 90% | 2572 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 84% | 34,621 psi | 85% | 2441 fps | 96.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 35,389 psi | 87% | 2362 fps | 99.6% |
| Somchem S355 | <<locked>> | 84% | 35,650 psi | 88% | 2448 fps | 96.3% |
| Somchem S365 | <<locked>> | 94% | 34,983 psi | 86% | 2526 fps | 97.4% |
| Vihtavuori N135 | <<locked>> | 82% | 35,853 psi | 88% | 2448 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 36,274 psi | 89% | 2444 fps | 97.9% |
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% | 34,330 psi | 85% | 2425 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,880 psi | 81% | 2395 fps | 95.9% |
| Alliant Reloder-17 | <<locked>> | 86% | 34,577 psi | 85% | 2507 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 32,561 psi | 80% | 2398 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 33,823 psi | 83% | 2431 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,620 psi | 83% | 2461 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,266 psi | 65% | 1490 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 33,475 psi | 82% | 2392 fps | 95.5% |
| ReloadSwiss RS 14 | 12.1 gr | 80% | 26,469 psi | 65% | 1522 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 30,443 psi | 75% | 2405 fps | 96.3% |
| Rottweil R 903 | <<locked>> | 82% | 32,721 psi | 81% | 2395 fps | 95.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,431 psi | 82% | 2320 fps | 99.3% |
| Somchem S355 | <<locked>> | 82% | 33,721 psi | 83% | 2402 fps | 95.6% |
| Somchem S365 | 39.4 gr | 90% | 31,198 psi | 77% | 2428 fps | 95.9% |
| Vihtavuori N135 | <<locked>> | 80% | 33,663 psi | 83% | 2402 fps | 100% |
| Vihtavuori N150 | 34 gr | 82% | 28,732 psi | 71% | 2264 fps | 95.3% |
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 16 powders for 7 x 72 R loaded with the .284 | 140gr | Nosler CT FailSafe. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,572 fps; across all powders the maximum-charge window runs from 1,660 fps to 2,572 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 16 of the 16 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 140.0 gr projectile in 0.284" calls for a 1:12.5 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, Vihtavuori N150, ReloadSwiss RS 14 rank at the top here: for 7 x 72 R with the .284 | 140gr | Nosler CT FailSafe 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.