Load Specifications
Load data in caliber 7 x 72 R with .284 | 140gr | NorthFork Bonded Core bullet and 22 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Somchem S365 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 2495 | <<locked>> | 84% | 36,419 psi | 90% | 2457 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 36,506 psi | 90% | 2487 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 35,897 psi | 88% | 2470 fps | 96.7% |
| Bofors RP3 | <<locked>> | 86% | 35,244 psi | 87% | 2470 fps | 96.6% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 34,737 psi | 86% | 2474 fps | 96.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,243 psi | 84% | 1640 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 36,463 psi | 90% | 2500 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 82% | 36,463 psi | 90% | 2477 fps | 98.7% |
| Lovex S062 | <<locked>> | 84% | 36,201 psi | 89% | 2444 fps | 97.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,563 psi | 85% | 1683 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 35,766 psi | 88% | 2549 fps | 98.2% |
| Rottweil R 902 | <<locked>> | 82% | 35,781 psi | 88% | 2411 fps | 97% |
| Rottweil R 903 | <<locked>> | 88% | 35,157 psi | 87% | 2461 fps | 96.3% |
| Shooters World Match Rifle | <<locked>> | 82% | 36,463 psi | 90% | 2477 fps | 98.7% |
| Shooters World Precision | <<locked>> | 84% | 36,201 psi | 89% | 2444 fps | 97.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 36,637 psi | 90% | 2392 fps | 99.7% |
| Somchem S355 | <<locked>> | 88% | 36,434 psi | 90% | 2470 fps | 96.4% |
| Somchem S365 | <<locked>> | 98% | 35,868 psi | 88% | 2549 fps | 97.5% |
| Vihtavuori N135 | <<locked>> | 82% | 34,577 psi | 85% | 2411 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 35,143 psi | 87% | 2405 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 92% | 34,911 psi | 86% | 2421 fps | 97.4% |
| Vihtavuori N540 | <<locked>> | 82% | 34,867 psi | 86% | 2425 fps | 98.8% |
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% | 31,821 psi | 78% | 2362 fps | 99.9% |
| Accurate 4064 | <<locked>> | 80% | 30,110 psi | 74% | 2339 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 31,517 psi | 78% | 2369 fps | 95.1% |
| Bofors RP3 | <<locked>> | 82% | 30,864 psi | 76% | 2369 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 32,503 psi | 80% | 2418 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,570 psi | 63% | 1470 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 32,053 psi | 79% | 2405 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 80% | 34,258 psi | 84% | 2431 fps | 98.2% |
| Lovex S062 | <<locked>> | 80% | 31,865 psi | 78% | 2343 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,686 psi | 63% | 1503 fps | 100% |
| ReloadSwiss RS 60 | 36.6 gr | 82% | 29,414 psi | 72% | 2375 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 33,692 psi | 83% | 2362 fps | 96.3% |
| Rottweil R 903 | <<locked>> | 86% | 33,040 psi | 81% | 2411 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 34,258 psi | 84% | 2431 fps | 98.2% |
| Shooters World Precision | <<locked>> | 80% | 31,865 psi | 78% | 2343 fps | 95.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,414 psi | 75% | 2257 fps | 98.6% |
| Somchem S355 | <<locked>> | 86% | 34,301 psi | 84% | 2425 fps | 95.6% |
| Somchem S365 | 39.8 gr | 94% | 31,633 psi | 78% | 2441 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 32,445 psi | 80% | 2365 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 33,054 psi | 81% | 2359 fps | 98.7% |
| Vihtavuori N150 | 34.5 gr | 86% | 29,037 psi | 72% | 2280 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 32,605 psi | 80% | 2372 fps | 98.2% |
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 48 powders for 7 x 72 R loaded with the .284 | 140gr | NorthFork Bonded Core. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,549 fps; across all powders the maximum-charge window runs from 1,640 fps to 2,549 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 48 of the 48 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 75–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Hodgdon TrailBoss, IMR 4831 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, Somchem S365, Vihtavuori N150 rank at the top here: for 7 x 72 R with the .284 | 140gr | NorthFork Bonded Core 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.