Load Specifications
Load data in caliber 7 x 72 R with .284 | 177gr | Brenneke TIG bullet and 46 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N555, Somchem S365 and Winchester StaBALL HD.
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 4350 | <<locked>> | 88% | 36,230 psi | 89% | 2267 fps | 97.5% |
| Accurate 4350 | <<locked>> | 88% | 34,867 psi | 86% | 2231 fps | 96.9% |
| Alliant Reloder-16 | <<locked>> | 88% | 36,521 psi | 90% | 2277 fps | 97.6% |
| Alliant Reloder-16 | <<locked>> | 88% | 35,650 psi | 88% | 2247 fps | 97.1% |
| Alliant Reloder-17 | <<locked>> | 84% | 35,940 psi | 89% | 2293 fps | 98.9% |
| Alliant Reloder-17 | <<locked>> | 84% | 35,070 psi | 86% | 2264 fps | 98.6% |
| Alliant Reloder-23 | <<locked>> | 98% | 35,186 psi | 87% | 2287 fps | 98.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,332 psi | 89% | 2297 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 35,998 psi | 89% | 2356 fps | 96.8% |
| Alliant Reloder-26 | <<locked>> | 96% | 34,925 psi | 86% | 2320 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 35,679 psi | 88% | 2231 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 36,738 psi | 90% | 2238 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,288 psi | 87% | 1473 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,375 psi | 87% | 1463 fps | 100% |
| IMR 4831 | <<locked>> | 92% | 35,737 psi | 88% | 2241 fps | 97.4% |
| IMR 4831 | <<locked>> | 90% | 36,143 psi | 89% | 2241 fps | 97.3% |
| Lovex S065 | <<locked>> | 84% | 36,114 psi | 89% | 2182 fps | 95.8% |
| Norma URP | <<locked>> | 88% | 36,318 psi | 89% | 2264 fps | 97.3% |
| Norma URP | <<locked>> | 88% | 35,389 psi | 87% | 2234 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,839 psi | 88% | 1509 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,897 psi | 88% | 1499 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 35,810 psi | 88% | 2300 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 34,911 psi | 86% | 2267 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 35,723 psi | 88% | 2280 fps | 97% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 34,853 psi | 86% | 2251 fps | 96.5% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 36,172 psi | 89% | 2290 fps | 96.2% |
| Rottweil R 903 | <<locked>> | 82% | 36,289 psi | 89% | 2218 fps | 99% |
| Rottweil R 903 | <<locked>> | 82% | 35,447 psi | 87% | 2192 fps | 98.7% |
| Shooters World Long Rifle | <<locked>> | 84% | 36,114 psi | 89% | 2182 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 36,492 psi | 90% | 2238 fps | 98.3% |
| Somchem S355 | <<locked>> | 82% | 36,289 psi | 89% | 2195 fps | 98.7% |
| Somchem S365 | <<locked>> | 90% | 34,751 psi | 86% | 2274 fps | 99.6% |
| Somchem S365 | <<locked>> | 92% | 35,998 psi | 89% | 2287 fps | 99.6% |
| Unknown powder | <<locked>> | 84% | 35,099 psi | 86% | 2224 fps | 96.2% |
| Vihtavuori N150 | <<locked>> | 86% | 35,853 psi | 88% | 2178 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 82% | 34,563 psi | 85% | 2142 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 84% | 34,983 psi | 86% | 2198 fps | 96.8% |
| Vihtavuori N160 | <<locked>> | 86% | 34,853 psi | 86% | 2188 fps | 96.6% |
| Vihtavuori N550 | <<locked>> | 84% | 35,273 psi | 87% | 2238 fps | 96.8% |
| Vihtavuori N550 | <<locked>> | 88% | 36,390 psi | 90% | 2238 fps | 96.9% |
| Vihtavuori N555 | <<locked>> | 96% | 35,752 psi | 88% | 2306 fps | 98% |
| Vihtavuori N555 | <<locked>> | 96% | 34,577 psi | 85% | 2274 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 35,766 psi | 88% | 2201 fps | 98.8% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 34,867 psi | 86% | 2172 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 33,475 psi | 82% | 2339 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,532 psi | 80% | 2297 fps | 98.5% |
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 4350 | <<locked>> | 82% | 29,399 psi | 72% | 2119 fps | 95% |
| Accurate 4350 | <<locked>> | 84% | 30,589 psi | 75% | 2139 fps | 95.4% |
| Alliant Reloder-16 | <<locked>> | 82% | 30,400 psi | 75% | 2136 fps | 95.2% |
| Alliant Reloder-16 | <<locked>> | 84% | 31,618 psi | 78% | 2152 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 31,502 psi | 78% | 2192 fps | 97.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 30,676 psi | 76% | 2162 fps | 97.1% |
| Alliant Reloder-23 | <<locked>> | 90% | 27,775 psi | 68% | 2103 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 90% | 27,137 psi | 67% | 2073 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 94% | 33,707 psi | 83% | 2303 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 94% | 32,634 psi | 80% | 2264 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 26,034 psi | 64% | 2001 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 26,992 psi | 66% | 2018 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,484 psi | 65% | 1316 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,324 psi | 65% | 1302 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 29,747 psi | 73% | 2110 fps | 95.2% |
| IMR 4831 | <<locked>> | 84% | 29,762 psi | 73% | 2103 fps | 95% |
| Lovex S065 | <<locked>> | 82% | 33,823 psi | 83% | 2136 fps | 95% |
| Norma URP | <<locked>> | 82% | 30,110 psi | 74% | 2126 fps | 95% |
| Norma URP | <<locked>> | 84% | 31,270 psi | 77% | 2142 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,745 psi | 66% | 1348 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,600 psi | 66% | 1335 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 33,533 psi | 83% | 2247 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 32,648 psi | 80% | 2218 fps | 99.6% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 31,459 psi | 77% | 2185 fps | 95.4% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 32,547 psi | 80% | 2201 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 86% | 33,881 psi | 83% | 2238 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 80% | 34,127 psi | 84% | 2175 fps | 98.6% |
| Rottweil R 903 | <<locked>> | 80% | 33,272 psi | 82% | 2149 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 82% | 33,823 psi | 83% | 2136 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,084 psi | 84% | 2188 fps | 97.7% |
| Somchem S355 | <<locked>> | 80% | 34,127 psi | 84% | 2152 fps | 98.2% |
| Somchem S365 | 33 gr | 80% | 25,396 psi | 63% | 2037 fps | 96.5% |
| Somchem S365 | 33 gr | 80% | 24,627 psi | 61% | 2005 fps | 95.8% |
| Unknown powder | <<locked>> | 82% | 32,808 psi | 81% | 2175 fps | 95.3% |
| Vihtavuori N150 | <<locked>> | 80% | 29,820 psi | 73% | 2051 fps | 98.4% |
| Vihtavuori N150 | <<locked>> | 80% | 32,474 psi | 80% | 2100 fps | 98.9% |
| Vihtavuori N160 | <<locked>> | 80% | 30,777 psi | 76% | 2106 fps | 95.2% |
| Vihtavuori N160 | <<locked>> | 84% | 32,779 psi | 81% | 2146 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 31,009 psi | 76% | 2146 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 84% | 31,952 psi | 79% | 2146 fps | 95.3% |
| Vihtavuori N555 | 37.4 gr | 90% | 29,573 psi | 73% | 2169 fps | 95.9% |
| Vihtavuori N555 | 36.6 gr | 90% | 28,529 psi | 70% | 2133 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,370 psi | 72% | 2060 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,689 psi | 71% | 2031 fps | 96.3% |
| Winchester StaBALL HD | 41.2 gr | 94% | 27,644 psi | 68% | 2169 fps | 96.2% |
| Winchester StaBALL HD | 40.3 gr | 94% | 26,948 psi | 66% | 2129 fps | 95.2% |
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 46 powders for 7 x 72 R loaded with the .284 | 177gr | Brenneke TIG. Alliant Reloder-26 delivers the highest muzzle velocity at 2,356 fps; across all powders the maximum-charge window runs from 1,463 fps to 2,356 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 46 of the 46 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 80–90 %, leaving at least 10 % headroom. The 177.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Hodgdon TrailBoss, Hodgdon TrailBoss 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. Vihtavuori N555, Somchem S365, Winchester StaBALL HD rank at the top here: for 7 x 72 R with the .284 | 177gr | Brenneke TIG 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.