Load Specifications
Load data in caliber 7 x 72 R with .284 | 150gr | Osprey Virtus bullet and 32 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Somchem S365 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.
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Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 86% | 36,347 psi | 90% | 2362 fps | 100% |
| Accurate 4064 | <<locked>> | 88% | 36,651 psi | 90% | 2395 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 36,579 psi | 90% | 2388 fps | 97.3% |
| Alliant Reloder-17 | <<locked>> | 92% | 36,593 psi | 90% | 2457 fps | 96.4% |
| Bofors RP3 | <<locked>> | 88% | 35,897 psi | 88% | 2388 fps | 97.2% |
| Hodgdon BL-C2 | <<locked>> | 82% | 36,724 psi | 90% | 2395 fps | 98.2% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 35,389 psi | 87% | 2372 fps | 96% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 35,491 psi | 87% | 2395 fps | 97% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,069 psi | 84% | 1555 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 35,447 psi | 87% | 2329 fps | 96.4% |
| IMR 3031 | <<locked>> | 84% | 34,853 psi | 86% | 2369 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 35,766 psi | 88% | 2379 fps | 96.1% |
| Lovex D073.6 | <<locked>> | 82% | 34,824 psi | 86% | 2349 fps | 98.6% |
| Lovex S062 | <<locked>> | 86% | 36,622 psi | 90% | 2356 fps | 97.7% |
| Norma 201 | <<locked>> | 82% | 36,100 psi | 89% | 2329 fps | 97.5% |
| Norma 202 | <<locked>> | 82% | 36,216 psi | 89% | 2349 fps | 99.3% |
| Norma 203B | <<locked>> | 86% | 36,651 psi | 90% | 2388 fps | 96.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,374 psi | 85% | 1598 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 36,463 psi | 90% | 2467 fps | 98.8% |
| Rottweil R 902 | <<locked>> | 84% | 36,492 psi | 90% | 2329 fps | 97.5% |
| Rottweil R 903 | <<locked>> | 90% | 35,795 psi | 88% | 2379 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 34,824 psi | 86% | 2349 fps | 98.6% |
| Shooters World Precision | <<locked>> | 86% | 36,622 psi | 90% | 2356 fps | 97.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 35,157 psi | 87% | 2264 fps | 99.6% |
| Somchem S341 | <<locked>> | 82% | 36,550 psi | 90% | 2352 fps | 96% |
| Somchem S355 | <<locked>> | 88% | 34,751 psi | 86% | 2339 fps | 96.2% |
| Somchem S365ᴾ | <<locked>> | 100% | 36,289 psi | 89% | 2461 fps | 98% |
| Vihtavuori N133 | <<locked>> | 82% | 35,563 psi | 88% | 2264 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 35,273 psi | 87% | 2329 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 35,810 psi | 88% | 2323 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 94% | 35,447 psi | 87% | 2336 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 84% | 35,375 psi | 87% | 2339 fps | 99.1% |
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 2495 | <<locked>> | 80% | 29,704 psi | 73% | 2228 fps | 99.8% |
| Accurate 4064 | <<locked>> | 80% | 28,137 psi | 69% | 2205 fps | 97.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 30,153 psi | 74% | 2244 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 90% | 34,098 psi | 84% | 2398 fps | 95.4% |
| Bofors RP3 | <<locked>> | 84% | 31,038 psi | 76% | 2283 fps | 95.6% |
| Hodgdon BL-C2 | <<locked>> | 80% | 34,345 psi | 85% | 2346 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 33,199 psi | 82% | 2323 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 30,951 psi | 76% | 2287 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,121 psi | 62% | 1388 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 33,185 psi | 82% | 2280 fps | 95.6% |
| IMR 3031 | <<locked>> | 80% | 30,560 psi | 75% | 2274 fps | 99.4% |
| IMR 4895 | <<locked>> | 82% | 33,504 psi | 83% | 2329 fps | 95.3% |
| Lovex D073.6 | <<locked>> | 80% | 32,518 psi | 80% | 2300 fps | 98.1% |
| Lovex S062 | <<locked>> | 80% | 30,240 psi | 74% | 2215 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 33,765 psi | 83% | 2280 fps | 96.8% |
| Norma 202 | <<locked>> | 80% | 33,866 psi | 83% | 2300 fps | 98.9% |
| Norma 203B | <<locked>> | 84% | 34,301 psi | 84% | 2339 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,208 psi | 62% | 1421 fps | 100% |
| ReloadSwiss RS 60 | 34.2 gr | 82% | 28,094 psi | 69% | 2247 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 32,242 psi | 79% | 2238 fps | 96.2% |
| Rottweil R 903 | <<locked>> | 86% | 31,227 psi | 77% | 2280 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,518 psi | 80% | 2300 fps | 98.1% |
| Shooters World Precision | <<locked>> | 80% | 30,240 psi | 74% | 2215 fps | 95.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,138 psi | 72% | 2136 fps | 98.5% |
| Somchem S341 | <<locked>> | 80% | 33,982 psi | 84% | 2300 fps | 95.1% |
| Somchem S355 | <<locked>> | 86% | 32,532 psi | 80% | 2290 fps | 95.4% |
| Somchem S365 | 37.2 gr | 94% | 30,168 psi | 74% | 2313 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 33,504 psi | 83% | 2224 fps | 99.9% |
| Vihtavuori N135 | <<locked>> | 80% | 30,893 psi | 76% | 2241 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 80% | 31,589 psi | 78% | 2234 fps | 98.7% |
| Vihtavuori N150 | 32.2 gr | 86% | 27,514 psi | 68% | 2156 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 31,038 psi | 76% | 2244 fps | 98.1% |
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 32 powders for 7 x 72 R loaded with the .284 | 150gr | Osprey Virtus. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,467 fps; across all powders the maximum-charge window runs from 1,555 fps to 2,467 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 32 of the 32 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 84–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.284" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, Somchem S365 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. ReloadSwiss RS 60, Somchem S365, Vihtavuori N150 rank at the top here: for 7 x 72 R with the .284 | 150gr | Osprey Virtus 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.