Load Specifications
Load data in caliber 7 x 72 R with .284 | 175gr | Barnes Solid RN bullet and 29 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-16 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% | 36,448 psi | 90% | 2201 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 34,519 psi | 85% | 2231 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 82% | 36,419 psi | 90% | 2175 fps | 97.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 35,795 psi | 88% | 2195 fps | 98.7% |
| Alliant Reloder-16 | <<locked>> | 90% | 35,708 psi | 88% | 2247 fps | 96.7% |
| Alliant Reloder-17 | <<locked>> | 86% | 35,128 psi | 87% | 2267 fps | 98.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 33,881 psi | 83% | 2244 fps | 97.7% |
| Bofors RP3 | <<locked>> | 82% | 34,809 psi | 86% | 2192 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 82% | 36,085 psi | 89% | 2198 fps | 96.1% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 34,505 psi | 85% | 2198 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,896 psi | 86% | 1450 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 35,795 psi | 88% | 2156 fps | 97.4% |
| IMR 4831 | <<locked>> | 96% | 36,622 psi | 90% | 2254 fps | 97.1% |
| Norma URP | <<locked>> | 90% | 35,302 psi | 87% | 2234 fps | 96.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,404 psi | 87% | 1490 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 34,911 psi | 86% | 2270 fps | 99.7% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 34,490 psi | 85% | 2247 fps | 95.9% |
| Rottweil R 903 | <<locked>> | 84% | 35,027 psi | 86% | 2188 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 36,405 psi | 90% | 2241 fps | 98% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 35,998 psi | 89% | 2110 fps | 100% |
| Somchem S355 | <<locked>> | 84% | 36,289 psi | 89% | 2201 fps | 98.5% |
| Somchem S365 | <<locked>> | 94% | 35,694 psi | 88% | 2283 fps | 99.4% |
| Unknown powder | <<locked>> | 88% | 36,303 psi | 89% | 2241 fps | 95.9% |
| Vihtavuori N150 | <<locked>> | 88% | 34,867 psi | 86% | 2156 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 88% | 36,201 psi | 89% | 2215 fps | 96.5% |
| Vihtavuori N550 | <<locked>> | 88% | 36,622 psi | 90% | 2260 fps | 96.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 36,114 psi | 89% | 2310 fps | 97.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 35,099 psi | 86% | 2178 fps | 98.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 30,139 psi | 74% | 2224 fps | 96.7% |
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% | 34,142 psi | 84% | 2159 fps | 99.9% |
| Accurate 4350 | <<locked>> | 88% | 32,198 psi | 79% | 2182 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 34,142 psi | 84% | 2129 fps | 96.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,547 psi | 83% | 2152 fps | 98.1% |
| Alliant Reloder-16 | 34.4 gr | 88% | 33,547 psi | 83% | 2198 fps | 95.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 28,877 psi | 71% | 2116 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 94% | 28,413 psi | 70% | 2110 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 32,605 psi | 80% | 2146 fps | 98% |
| Hodgdon H380 | <<locked>> | 80% | 33,808 psi | 83% | 2152 fps | 95.4% |
| Hodgdon Hybrid 100V | 33.4 gr | 86% | 28,674 psi | 71% | 2064 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,933 psi | 64% | 1296 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 33,533 psi | 83% | 2110 fps | 96.8% |
| IMR 4831 | <<locked>> | 92% | 32,140 psi | 79% | 2162 fps | 95.6% |
| Norma URP | <<locked>> | 88% | 33,112 psi | 82% | 2188 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,150 psi | 64% | 1325 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 30,792 psi | 76% | 2175 fps | 98.9% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 32,358 psi | 80% | 2198 fps | 95% |
| Rottweil R 903 | <<locked>> | 80% | 30,647 psi | 75% | 2096 fps | 97.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 31,865 psi | 78% | 2142 fps | 96.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,678 psi | 83% | 2067 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 31,908 psi | 79% | 2110 fps | 97.3% |
| Somchem S365 | 32.7 gr | 82% | 24,410 psi | 60% | 2001 fps | 95.1% |
| Unknown powder | <<locked>> | 86% | 34,055 psi | 84% | 2192 fps | 95.1% |
| Vihtavuori N150 | <<locked>> | 80% | 27,180 psi | 67% | 1988 fps | 97% |
| Vihtavuori N160 | <<locked>> | 86% | 33,968 psi | 84% | 2169 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 84% | 31,937 psi | 79% | 2162 fps | 95% |
| Vihtavuori N555 | <<locked>> | 94% | 29,965 psi | 74% | 2172 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 28,848 psi | 71% | 2034 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 98% | 28,369 psi | 70% | 2169 fps | 95.4% |
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 29 powders for 7 x 72 R loaded with the .284 | 175gr | Barnes Solid RN. Vihtavuori N555 delivers the highest muzzle velocity at 2,310 fps; across all powders the maximum-charge window runs from 1,450 fps to 2,310 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 29 of the 29 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 74–90 %, leaving at least 10 % headroom. The 175.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, 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-16, Hodgdon Hybrid 100V rank at the top here: for 7 x 72 R with the .284 | 175gr | Barnes Solid RN 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.