Load Specifications
Load data in caliber 7 x 72 R with .284 | 140gr | Barnes XLC BT bullet and 12 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% | 36,143 psi | 89% | 2441 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 36,477 psi | 90% | 2454 fps | 96.7% |
| Bofors RP3 | <<locked>> | 84% | 36,361 psi | 90% | 2461 fps | 96.8% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 35,273 psi | 87% | 2457 fps | 96.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,867 psi | 86% | 1637 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,346 psi | 87% | 1680 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 36,042 psi | 89% | 2526 fps | 98.1% |
| Rottweil R 903 | <<locked>> | 86% | 36,260 psi | 89% | 2451 fps | 96.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 34,969 psi | 86% | 2329 fps | 99.4% |
| Somchem S355 | <<locked>> | 84% | 35,201 psi | 87% | 2411 fps | 95.8% |
| Somchem S365 | <<locked>> | 96% | 36,434 psi | 90% | 2533 fps | 97.5% |
| Vihtavuori N150 | <<locked>> | 90% | 35,839 psi | 88% | 2411 fps | 97.5% |
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% | 34,171 psi | 84% | 2395 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,300 psi | 80% | 2356 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 32,169 psi | 79% | 2362 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,127 psi | 82% | 2402 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,136 psi | 64% | 1463 fps | 100% |
| ReloadSwiss RS 14 | 11.5 gr | 80% | 26,382 psi | 65% | 1499 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 30,066 psi | 74% | 2359 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 82% | 32,314 psi | 80% | 2359 fps | 95% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,982 psi | 81% | 2283 fps | 99.1% |
| Somchem S355 | <<locked>> | 82% | 33,272 psi | 82% | 2365 fps | 95.1% |
| Somchem S365 | 37.6 gr | 90% | 30,719 psi | 76% | 2385 fps | 95.1% |
| Vihtavuori N150 | 33.3 gr | 84% | 30,168 psi | 74% | 2277 fps | 95.5% |
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 33 powders for 7 x 72 R loaded with the .284 | 140gr | Barnes XLC BT. 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. Alliant Reloder-23 gives the best case fill at 100 %, and 33 of the 33 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 81–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:10.5 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 | Barnes XLC 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 Reloder-16 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.