Load Specifications
Load data in caliber 7 x 72 R with .284 | 156gr | Lapua Naturalis bullet and 18 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, Hodgdon Hybrid 100V 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 4064 | <<locked>> | 82% | 36,318 psi | 89% | 2326 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 34,969 psi | 86% | 2303 fps | 97.3% |
| Alliant Reloder-17 | <<locked>> | 88% | 36,448 psi | 90% | 2411 fps | 97.1% |
| Bofors RP3 | <<locked>> | 84% | 36,695 psi | 90% | 2352 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 35,897 psi | 88% | 2343 fps | 96.9% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 35,592 psi | 88% | 2349 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,896 psi | 86% | 1545 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 35,128 psi | 87% | 2260 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 82% | 36,289 psi | 89% | 2352 fps | 96.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,418 psi | 87% | 1585 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 36,608 psi | 90% | 2428 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 84% | 34,621 psi | 85% | 2303 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 35,679 psi | 88% | 2346 fps | 96.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 35,317 psi | 87% | 2221 fps | 99.8% |
| Somchem S355 | <<locked>> | 84% | 35,592 psi | 88% | 2306 fps | 97% |
| Somchem S365 | <<locked>> | 94% | 34,838 psi | 86% | 2385 fps | 98.1% |
| Vihtavuori N150 | <<locked>> | 90% | 36,230 psi | 89% | 2303 fps | 98.4% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 36,651 psi | 90% | 2320 fps | 97.1% |
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% | 34,185 psi | 84% | 2280 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,880 psi | 81% | 2257 fps | 96.6% |
| Alliant Reloder-17 | <<locked>> | 84% | 32,242 psi | 79% | 2310 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 32,430 psi | 80% | 2260 fps | 96.6% |
| Hodgdon Hybrid 100V | 35.5 gr | 90% | 31,923 psi | 79% | 2251 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,562 psi | 83% | 2303 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,165 psi | 64% | 1381 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 33,054 psi | 81% | 2215 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 33,997 psi | 84% | 2300 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,411 psi | 65% | 1414 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 30,327 psi | 75% | 2267 fps | 97.2% |
| Rottweil R 903 | <<locked>> | 80% | 30,603 psi | 75% | 2208 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 33,373 psi | 82% | 2293 fps | 95.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,170 psi | 82% | 2175 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 31,575 psi | 78% | 2215 fps | 95.6% |
| Somchem S365 | 34.9 gr | 86% | 27,630 psi | 68% | 2195 fps | 95% |
| Vihtavuori N150 | 30.8 gr | 80% | 27,093 psi | 67% | 2093 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 32,300 psi | 80% | 2221 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 41 powders for 7 x 72 R loaded with the .284 | 156gr | Lapua Naturalis. Alliant Reloder-26 delivers the highest muzzle velocity at 2,451 fps; across all powders the maximum-charge window runs from 1,545 fps to 2,451 fps. Accurate 3100 gives the best case fill at 100 %, and 41 of the 41 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 74–90 %, leaving at least 10 % headroom. The 155.0 gr projectile in 0.284" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-26 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, Hodgdon Hybrid 100V, Vihtavuori N150 rank at the top here: for 7 x 72 R with the .284 | 156gr | Lapua Naturalis they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, Alliant Reloder-16, Alliant Reloder-26 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.