Load Specifications
Load data in caliber 7 x 72 R with .284 | 160gr | NorthFork Bonded Core bullet and 24 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 2495 | <<locked>> | 82% | 36,521 psi | 90% | 2277 fps | 100% |
| Accurate 4064 | <<locked>> | 82% | 34,490 psi | 85% | 2267 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 36,027 psi | 89% | 2300 fps | 97.9% |
| Alliant Reloder-15 | <<locked>> | 82% | 36,390 psi | 90% | 2306 fps | 96.5% |
| Alliant Reloder-17 | <<locked>> | 88% | 35,505 psi | 87% | 2365 fps | 97.2% |
| Bofors RP3 | <<locked>> | 84% | 35,317 psi | 87% | 2300 fps | 97.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 34,650 psi | 85% | 2290 fps | 96.9% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 34,809 psi | 86% | 2306 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,679 psi | 85% | 1519 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 36,274 psi | 89% | 2260 fps | 96.5% |
| IMR 4831 | <<locked>> | 98% | 36,492 psi | 90% | 2349 fps | 95.9% |
| Lovex S062 | <<locked>> | 82% | 36,013 psi | 89% | 2267 fps | 98.2% |
| Norma 203B | <<locked>> | 82% | 35,781 psi | 88% | 2297 fps | 97% |
| Ramshot Big Game | <<locked>> | 82% | 35,302 psi | 87% | 2306 fps | 96.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,128 psi | 87% | 1558 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 35,389 psi | 87% | 2375 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 86% | 35,520 psi | 87% | 2297 fps | 97.6% |
| Shooters World Precision | <<locked>> | 82% | 36,013 psi | 89% | 2267 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 34,360 psi | 85% | 2290 fps | 96.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 36,521 psi | 90% | 2215 fps | 100% |
| Somchem S355 | <<locked>> | 86% | 36,579 psi | 90% | 2303 fps | 97.6% |
| Somchem S365 | <<locked>> | 96% | 35,969 psi | 89% | 2385 fps | 98.7% |
| Vihtavuori N150 | <<locked>> | 90% | 35,114 psi | 86% | 2254 fps | 98.5% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 35,520 psi | 87% | 2274 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 2495 | <<locked>> | 80% | 34,171 psi | 84% | 2234 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 32,314 psi | 80% | 2221 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 31,662 psi | 78% | 2205 fps | 96.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 34,171 psi | 84% | 2257 fps | 95.8% |
| Alliant Reloder-17 | 35.6 gr | 84% | 31,227 psi | 77% | 2260 fps | 95.4% |
| Bofors RP3 | <<locked>> | 80% | 31,024 psi | 76% | 2205 fps | 96.5% |
| Hodgdon Hybrid 100V | 35.2 gr | 90% | 30,821 psi | 76% | 2201 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 32,489 psi | 80% | 2254 fps | 96.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,831 psi | 64% | 1355 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 34,026 psi | 84% | 2211 fps | 95.8% |
| IMR 4831 | <<locked>> | 96% | 34,258 psi | 84% | 2300 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 33,823 psi | 83% | 2221 fps | 97.7% |
| Norma 203B | <<locked>> | 80% | 33,562 psi | 83% | 2247 fps | 96.2% |
| Ramshot Big Game | <<locked>> | 80% | 32,982 psi | 81% | 2254 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,034 psi | 64% | 1388 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 29,225 psi | 72% | 2218 fps | 97.2% |
| Rottweil R 903 | <<locked>> | 80% | 29,182 psi | 72% | 2156 fps | 95.4% |
| Shooters World Precision | <<locked>> | 80% | 33,823 psi | 83% | 2221 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 32,329 psi | 80% | 2244 fps | 95.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,343 psi | 80% | 2136 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 30,240 psi | 74% | 2162 fps | 95.5% |
| Somchem S365 | 35.4 gr | 88% | 28,079 psi | 69% | 2192 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 25,802 psi | 64% | 2037 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 31,343 psi | 77% | 2178 fps | 95.6% |
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 24 powders for 7 x 72 R loaded with the .284 | 160gr | NorthFork Bonded Core. Somchem S365 delivers the highest muzzle velocity at 2,385 fps; across all powders the maximum-charge window runs from 1,519 fps to 2,385 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 24 of the 24 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 160.0 gr projectile in 0.284" calls for a 1:10.0 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 | 160gr | NorthFork Bonded Core 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.