Load Specifications
Load data in caliber 7 x 72 R with .284 | 160gr | Speer TBBC 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, Hodgdon Hybrid 100V and Winchester 6.5 StaBALL.
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% | 35,070 psi | 86% | 2283 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 82% | 35,360 psi | 87% | 2254 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 36,579 psi | 90% | 2316 fps | 98.1% |
| Alliant Reloder-17 | <<locked>> | 88% | 36,158 psi | 89% | 2388 fps | 97.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 32,677 psi | 80% | 2306 fps | 96% |
| Bofors RP3 | <<locked>> | 84% | 35,868 psi | 88% | 2316 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 35,288 psi | 87% | 2310 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,722 psi | 86% | 1526 fps | 100% |
| IMR 4831 | <<locked>> | 94% | 36,608 psi | 90% | 2356 fps | 96% |
| Lovex S062 | <<locked>> | 82% | 36,564 psi | 90% | 2283 fps | 98.4% |
| Norma 203B | <<locked>> | 82% | 36,579 psi | 90% | 2320 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 82% | 35,752 psi | 88% | 2323 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,172 psi | 87% | 1565 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 36,027 psi | 89% | 2398 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 86% | 36,056 psi | 89% | 2313 fps | 97.9% |
| Shooters World Precision | <<locked>> | 82% | 36,564 psi | 90% | 2283 fps | 98.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 35,056 psi | 86% | 2313 fps | 96.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 34,737 psi | 86% | 2188 fps | 99.9% |
| Somchem S355 | <<locked>> | 84% | 34,867 psi | 86% | 2274 fps | 97.3% |
| Somchem S365 | <<locked>> | 96% | 36,593 psi | 90% | 2405 fps | 99% |
| Vihtavuori N150 | <<locked>> | 86% | 35,346 psi | 87% | 2264 fps | 98.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 34,490 psi | 85% | 2375 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 36,071 psi | 89% | 2290 fps | 97.5% |
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 4064 | <<locked>> | 80% | 32,938 psi | 81% | 2238 fps | 99.6% |
| ADI AR 2208 | <<locked>> | 80% | 33,243 psi | 82% | 2208 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,227 psi | 79% | 2224 fps | 96.9% |
| Alliant Reloder-17 | <<locked>> | 84% | 31,807 psi | 78% | 2283 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 98% | 30,806 psi | 76% | 2260 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 31,517 psi | 78% | 2221 fps | 96.8% |
| Hodgdon Hybrid 100V | 35.7 gr | 90% | 31,227 psi | 77% | 2218 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,976 psi | 64% | 1365 fps | 100% |
| IMR 4831 | <<locked>> | 92% | 34,389 psi | 85% | 2310 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 34,374 psi | 85% | 2241 fps | 97.9% |
| Norma 203B | <<locked>> | 80% | 34,113 psi | 84% | 2267 fps | 96.5% |
| Ramshot Big Game | <<locked>> | 80% | 33,620 psi | 83% | 2274 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,179 psi | 64% | 1398 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 29,631 psi | 73% | 2238 fps | 97.5% |
| Rottweil R 903 | <<locked>> | 80% | 29,704 psi | 73% | 2172 fps | 95.7% |
| Shooters World Precision | <<locked>> | 80% | 34,374 psi | 85% | 2241 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 30,850 psi | 76% | 2215 fps | 95% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,576 psi | 80% | 2146 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 30,763 psi | 76% | 2182 fps | 95.9% |
| Somchem S365 | 35.1 gr | 86% | 26,774 psi | 66% | 2159 fps | 95.2% |
| Vihtavuori N150 | <<locked>> | 80% | 29,225 psi | 72% | 2129 fps | 96.8% |
| Vihtavuori N555 | <<locked>> | 98% | 32,430 psi | 80% | 2329 fps | 95.2% |
| Winchester 6.5 StaBALL | 37.1 gr | 84% | 29,834 psi | 73% | 2149 fps | 95% |
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 45 powders for 7 x 72 R loaded with the .284 | 160gr | Speer TBBC. Alliant Reloder-26 delivers the highest muzzle velocity at 2,425 fps; across all powders the maximum-charge window runs from 1,526 fps to 2,425 fps. Accurate 3100 gives the best case fill at 100 %, and 45 of the 45 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 72–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-23, Alliant Reloder-26 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, Hodgdon Hybrid 100V, Winchester 6.5 StaBALL rank at the top here: for 7 x 72 R with the .284 | 160gr | Speer TBBC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, Alliant Reloder-26, Hodgdon H380 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.