Load Specifications
Load data in caliber 7 x 72 R with .284 | 160gr | Sierra GameKing 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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 4064 | <<locked>> | 82% | 35,998 psi | 89% | 2306 fps | 99.9% |
| Accurate 4350 | <<locked>> | 92% | 36,172 psi | 89% | 2375 fps | 96.1% |
| ADI AR 2208 | <<locked>> | 82% | 35,853 psi | 88% | 2274 fps | 96.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 35,157 psi | 87% | 2297 fps | 97.9% |
| Alliant Reloder-17 | <<locked>> | 86% | 34,577 psi | 85% | 2362 fps | 97.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 33,591 psi | 83% | 2343 fps | 96.6% |
| Bofors RP3 | <<locked>> | 82% | 34,418 psi | 85% | 2293 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 36,172 psi | 89% | 2339 fps | 97.7% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 36,042 psi | 89% | 2349 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,867 psi | 86% | 1535 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 35,085 psi | 86% | 2251 fps | 96.4% |
| IMR 4831 | <<locked>> | 96% | 35,853 psi | 88% | 2349 fps | 96% |
| Ramshot Big Game | <<locked>> | 82% | 36,680 psi | 90% | 2349 fps | 97.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,317 psi | 87% | 1575 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 34,505 psi | 85% | 2372 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 84% | 34,606 psi | 85% | 2290 fps | 97.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 35,737 psi | 88% | 2336 fps | 97% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 35,534 psi | 88% | 2211 fps | 100% |
| Somchem S355 | <<locked>> | 84% | 35,621 psi | 88% | 2297 fps | 97.6% |
| Somchem S365 | <<locked>> | 94% | 35,244 psi | 87% | 2385 fps | 98.8% |
| Vihtavuori N150 | <<locked>> | 90% | 36,637 psi | 90% | 2300 fps | 99% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 35,592 psi | 88% | 2408 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 34,679 psi | 85% | 2274 fps | 97.3% |
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% | 33,808 psi | 83% | 2264 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 33,895 psi | 83% | 2326 fps | 95.3% |
| ADI AR 2208 | <<locked>> | 80% | 33,736 psi | 83% | 2228 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,025 psi | 81% | 2247 fps | 97.3% |
| Alliant Reloder-17 | <<locked>> | 82% | 30,298 psi | 75% | 2254 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 98% | 31,676 psi | 78% | 2293 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 32,343 psi | 80% | 2247 fps | 97.2% |
| Hodgdon Hybrid 100V | 35.7 gr | 88% | 30,153 psi | 74% | 2201 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,678 psi | 83% | 2297 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,976 psi | 64% | 1371 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 32,967 psi | 81% | 2205 fps | 95.7% |
| IMR 4831 | <<locked>> | 94% | 33,707 psi | 83% | 2303 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 80% | 34,301 psi | 84% | 2300 fps | 96.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,179 psi | 64% | 1404 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 30,197 psi | 74% | 2260 fps | 97.9% |
| Rottweil R 903 | <<locked>> | 80% | 30,240 psi | 74% | 2192 fps | 96.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 31,488 psi | 78% | 2238 fps | 95.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,402 psi | 82% | 2169 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 31,517 psi | 78% | 2208 fps | 96.3% |
| Somchem S365 | 35.8 gr | 86% | 27,340 psi | 67% | 2185 fps | 95.8% |
| Vihtavuori N150 | <<locked>> | 80% | 26,760 psi | 66% | 2077 fps | 96% |
| Vihtavuori N555 | <<locked>> | 98% | 33,257 psi | 82% | 2356 fps | 95.7% |
| Winchester 6.5 StaBALL | 37.9 gr | 84% | 30,530 psi | 75% | 2175 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 49 powders for 7 x 72 R loaded with the .284 | 160gr | Sierra GameKing. Alliant Reloder-26 delivers the highest muzzle velocity at 2,457 fps; across all powders the maximum-charge window runs from 1,535 fps to 2,457 fps. Accurate 3100 gives the best case fill at 100 %, and 49 of the 49 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 73–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.284" calls for a 1:11.0 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 | Sierra GameKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Accurate 3100, Alliant Reloder-26 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.