Load Specifications
Load data in caliber 7 x 72 R with .284 | 150gr | Barnes X BT 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.
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 |
|---|---|---|---|---|---|---|
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 36,013 psi | 89% | 2356 fps | 97.3% |
| Alliant Reloder-17 | <<locked>> | 86% | 35,215 psi | 87% | 2415 fps | 96.2% |
| Bofors RP3 | <<locked>> | 82% | 35,665 psi | 88% | 2362 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 34,679 psi | 85% | 2346 fps | 96.1% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 36,738 psi | 90% | 2408 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,418 psi | 87% | 1585 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 36,114 psi | 89% | 2313 fps | 95.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,636 psi | 88% | 1617 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 35,331 psi | 87% | 2431 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 84% | 35,810 psi | 88% | 2356 fps | 97% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 36,506 psi | 90% | 2395 fps | 96.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 36,260 psi | 89% | 2270 fps | 99.8% |
| Somchem S355 | <<locked>> | 84% | 36,709 psi | 90% | 2362 fps | 97% |
| Somchem S365 | <<locked>> | 94% | 35,926 psi | 88% | 2441 fps | 98.1% |
| Vihtavuori N150 | <<locked>> | 88% | 35,331 psi | 87% | 2316 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 35,302 psi | 87% | 2323 fps | 96.3% |
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 |
|---|---|---|---|---|---|---|
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,968 psi | 84% | 2313 fps | 96.7% |
| Alliant Reloder-17 | <<locked>> | 84% | 33,359 psi | 82% | 2365 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 33,707 psi | 83% | 2316 fps | 96.7% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 32,779 psi | 81% | 2300 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,461 psi | 85% | 2356 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,498 psi | 65% | 1414 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 34,040 psi | 84% | 2267 fps | 95% |
| ReloadSwiss RS 14 | 11.4 gr | 80% | 26,789 psi | 66% | 1447 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 31,241 psi | 77% | 2323 fps | 97.2% |
| Rottweil R 903 | <<locked>> | 80% | 31,908 psi | 79% | 2267 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 34,548 psi | 85% | 2349 fps | 95.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,171 psi | 84% | 2228 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 32,764 psi | 81% | 2270 fps | 95.7% |
| Somchem S365 | 35.4 gr | 86% | 28,660 psi | 71% | 2251 fps | 95.1% |
| Vihtavuori N150 | 31.3 gr | 80% | 28,239 psi | 70% | 2149 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 33,301 psi | 82% | 2274 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 16 powders for 7 x 72 R loaded with the .284 | 150gr | Barnes X BT. Somchem S365 delivers the highest muzzle velocity at 2,441 fps; across all powders the maximum-charge window runs from 1,585 fps to 2,441 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 150.0 gr projectile in 0.284" calls for a 1:10.5 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 | 150gr | Barnes X BT 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.