Load Specifications
Load data in caliber 7 x 72 R with .283 | 140gr | Frontier PH HPBT bullet and 24 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, 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>> | 84% | 35,447 psi | 87% | 2434 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 35,592 psi | 88% | 2461 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 35,085 psi | 86% | 2448 fps | 96.3% |
| Bofors RP3 | <<locked>> | 88% | 36,709 psi | 90% | 2497 fps | 97% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 36,361 psi | 90% | 2507 fps | 96.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,345 psi | 85% | 1637 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 36,056 psi | 89% | 2431 fps | 96% |
| IMR 3031 | <<locked>> | 84% | 35,766 psi | 88% | 2480 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 82% | 35,839 psi | 88% | 2461 fps | 98.5% |
| Lovex S062 | <<locked>> | 84% | 35,346 psi | 87% | 2418 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,345 psi | 85% | 1670 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 34,882 psi | 86% | 2520 fps | 97.8% |
| Rottweil R 902 | <<locked>> | 82% | 35,186 psi | 87% | 2392 fps | 96.7% |
| Rottweil R 903 | <<locked>> | 88% | 34,345 psi | 85% | 2438 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 82% | 35,839 psi | 88% | 2461 fps | 98.5% |
| Shooters World Precision | <<locked>> | 84% | 35,346 psi | 87% | 2418 fps | 96.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 36,114 psi | 89% | 2375 fps | 99.6% |
| Somchem S355 | <<locked>> | 88% | 35,621 psi | 88% | 2448 fps | 96% |
| Somchem S365 | <<locked>> | 98% | 35,027 psi | 86% | 2520 fps | 97% |
| Vihtavuori N133 | <<locked>> | 82% | 36,274 psi | 89% | 2369 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 36,172 psi | 89% | 2438 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 34,534 psi | 85% | 2388 fps | 99% |
| Vihtavuori N150 | <<locked>> | 94% | 36,347 psi | 90% | 2444 fps | 97.6% |
| Vihtavuori N540 | <<locked>> | 84% | 36,506 psi | 90% | 2454 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% | 31,140 psi | 77% | 2343 fps | 99.8% |
| Accurate 4064 | <<locked>> | 80% | 29,486 psi | 73% | 2320 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 32,967 psi | 81% | 2398 fps | 95.6% |
| Bofors RP3 | <<locked>> | 84% | 32,300 psi | 80% | 2398 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 32,053 psi | 79% | 2402 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,527 psi | 63% | 1463 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 33,924 psi | 84% | 2382 fps | 95.3% |
| IMR 3031 | <<locked>> | 80% | 31,372 psi | 77% | 2382 fps | 99.3% |
| Lovex D073.6 | <<locked>> | 80% | 33,359 psi | 82% | 2405 fps | 97.9% |
| Lovex S062 | <<locked>> | 80% | 31,256 psi | 77% | 2323 fps | 95.4% |
| ReloadSwiss RS 14 | 11.5 gr | 80% | 25,628 psi | 63% | 1496 fps | 100% |
| ReloadSwiss RS 60 | 36.8 gr | 84% | 30,792 psi | 76% | 2408 fps | 96% |
| Rottweil R 902 | <<locked>> | 80% | 33,083 psi | 81% | 2343 fps | 96% |
| Rottweil R 903 | <<locked>> | 86% | 32,227 psi | 79% | 2388 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,359 psi | 82% | 2405 fps | 97.9% |
| Shooters World Precision | <<locked>> | 80% | 31,256 psi | 77% | 2323 fps | 95.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,849 psi | 74% | 2238 fps | 98.3% |
| Somchem S355 | <<locked>> | 86% | 33,518 psi | 83% | 2398 fps | 95.2% |
| Somchem S365 | <<locked>> | 94% | 30,879 psi | 76% | 2415 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 34,345 psi | 85% | 2329 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 80% | 31,749 psi | 78% | 2346 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 80% | 32,184 psi | 79% | 2336 fps | 98.4% |
| Vihtavuori N150 | 34.7 gr | 88% | 30,356 psi | 75% | 2310 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 32,053 psi | 79% | 2352 fps | 98% |
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 24 powders for 7 x 72 R loaded with the .283 | 140gr | Frontier PH HPBT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,520 fps; across all powders the maximum-charge window runs from 1,637 fps to 2,520 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 24 of the 24 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 0.283" calls for a 1:10.0 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. ReloadSwiss RS 60, Vihtavuori N150, ReloadSwiss RS 14 rank at the top here: for 7 x 72 R with the .283 | 140gr | Frontier PH HPBT 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.