Load Specifications
Load data in caliber 7 x 72 R with .284 | 158gr | Sellier & Bellot XRG bullet and 23 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, Alliant Reloder-17 and Hodgdon Hybrid 100V.
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% | 34,766 psi | 86% | 2290 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 35,998 psi | 89% | 2320 fps | 97.9% |
| Alliant Reloder-15 | <<locked>> | 82% | 36,622 psi | 90% | 2329 fps | 96.5% |
| Alliant Reloder-17 | <<locked>> | 88% | 35,621 psi | 88% | 2388 fps | 97.2% |
| Bofors RP3 | <<locked>> | 84% | 35,520 psi | 87% | 2323 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 34,737 psi | 86% | 2310 fps | 96.9% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 34,751 psi | 86% | 2326 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,737 psi | 86% | 1535 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 36,260 psi | 89% | 2280 fps | 96.4% |
| IMR 4831 | <<locked>> | 98% | 36,550 psi | 90% | 2369 fps | 95.8% |
| Lovex S062 | <<locked>> | 82% | 36,274 psi | 89% | 2293 fps | 98.3% |
| Norma 203B | <<locked>> | 82% | 35,998 psi | 89% | 2320 fps | 97% |
| Ramshot Big Game | <<locked>> | 82% | 35,462 psi | 87% | 2329 fps | 96.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,172 psi | 87% | 1575 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 35,752 psi | 88% | 2402 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 86% | 35,447 psi | 87% | 2316 fps | 97.5% |
| Shooters World Precision | <<locked>> | 82% | 36,274 psi | 89% | 2293 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 34,548 psi | 85% | 2313 fps | 96.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 36,506 psi | 90% | 2234 fps | 100% |
| Somchem S355 | <<locked>> | 84% | 34,577 psi | 85% | 2280 fps | 97% |
| Somchem S365 | <<locked>> | 96% | 35,969 psi | 89% | 2405 fps | 98.7% |
| Vihtavuori N150 | <<locked>> | 90% | 35,302 psi | 87% | 2277 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 35,795 psi | 88% | 2297 fps | 97.2% |
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% | 32,590 psi | 80% | 2244 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,676 psi | 78% | 2224 fps | 96.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 34,432 psi | 85% | 2283 fps | 95.8% |
| Alliant Reloder-17 | 36.1 gr | 84% | 31,357 psi | 77% | 2283 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 30,980 psi | 76% | 2224 fps | 96.4% |
| Hodgdon Hybrid 100V | 35.7 gr | 90% | 30,966 psi | 76% | 2224 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 32,692 psi | 81% | 2277 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,686 psi | 63% | 1368 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 32,213 psi | 79% | 2188 fps | 95% |
| IMR 4831 | <<locked>> | 96% | 34,621 psi | 85% | 2326 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 34,084 psi | 84% | 2247 fps | 97.7% |
| Norma 203B | <<locked>> | 80% | 33,823 psi | 83% | 2274 fps | 96.3% |
| Ramshot Big Game | <<locked>> | 80% | 33,127 psi | 82% | 2277 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,165 psi | 64% | 1407 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 29,399 psi | 72% | 2241 fps | 97.2% |
| Rottweil R 903 | <<locked>> | 80% | 29,211 psi | 72% | 2172 fps | 95.3% |
| Shooters World Precision | <<locked>> | 80% | 34,084 psi | 84% | 2247 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 32,489 psi | 80% | 2267 fps | 95.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,358 psi | 80% | 2152 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 30,487 psi | 75% | 2188 fps | 95.6% |
| Somchem S365 | 35.9 gr | 88% | 28,210 psi | 69% | 2211 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 25,817 psi | 64% | 2057 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 31,401 psi | 77% | 2198 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 23 powders for 7 x 72 R loaded with the .284 | 158gr | Sellier & Bellot XRG. Somchem S365 delivers the highest muzzle velocity at 2,405 fps; across all powders the maximum-charge window runs from 1,535 fps to 2,405 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 23 of the 23 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 158.0 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, Alliant Reloder-17, Hodgdon Hybrid 100V rank at the top here: for 7 x 72 R with the .284 | 158gr | Sellier & Bellot XRG 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.