Load Specifications
Load data in caliber 7 x 72 R with .284 | 160gr | Alaska Bullet Works Kodiak SP SPBC 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% | 35,853 psi | 88% | 2303 fps | 99.9% |
| Accurate 4350 | <<locked>> | 92% | 36,042 psi | 89% | 2372 fps | 96% |
| ADI AR 2208 | <<locked>> | 82% | 35,708 psi | 88% | 2267 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 35,056 psi | 86% | 2290 fps | 97.9% |
| Alliant Reloder-17 | <<locked>> | 86% | 34,490 psi | 85% | 2359 fps | 97.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 33,475 psi | 82% | 2336 fps | 96.5% |
| Bofors RP3 | <<locked>> | 82% | 34,301 psi | 84% | 2290 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 36,071 psi | 89% | 2336 fps | 97.6% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 35,911 psi | 88% | 2343 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,969 psi | 86% | 1535 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 35,215 psi | 87% | 2251 fps | 96.4% |
| IMR 4831 | <<locked>> | 96% | 35,752 psi | 88% | 2346 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 82% | 36,550 psi | 90% | 2346 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,099 psi | 86% | 1568 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 34,403 psi | 85% | 2369 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 86% | 36,695 psi | 90% | 2333 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 35,621 psi | 88% | 2333 fps | 97% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 35,433 psi | 87% | 2208 fps | 100% |
| Somchem S355 | <<locked>> | 84% | 35,505 psi | 87% | 2293 fps | 97.6% |
| Somchem S365 | <<locked>> | 94% | 35,143 psi | 87% | 2382 fps | 98.7% |
| Vihtavuori N150 | <<locked>> | 90% | 36,492 psi | 90% | 2293 fps | 98.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 35,505 psi | 87% | 2405 fps | 96.6% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 34,606 psi | 85% | 2270 fps | 97.2% |
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% | 33,663 psi | 83% | 2260 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 33,765 psi | 83% | 2323 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 33,591 psi | 83% | 2221 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,924 psi | 81% | 2244 fps | 97.2% |
| Alliant Reloder-17 | <<locked>> | 82% | 30,197 psi | 74% | 2247 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 98% | 31,372 psi | 77% | 2283 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 32,184 psi | 79% | 2244 fps | 97.2% |
| Hodgdon Hybrid 100V | 35.6 gr | 88% | 30,066 psi | 74% | 2195 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,562 psi | 83% | 2293 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,063 psi | 64% | 1371 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 33,112 psi | 82% | 2205 fps | 95.7% |
| IMR 4831 | <<locked>> | 94% | 33,591 psi | 83% | 2300 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 34,185 psi | 84% | 2297 fps | 96.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,266 psi | 65% | 1404 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 30,327 psi | 75% | 2264 fps | 98% |
| Rottweil R 903 | <<locked>> | 80% | 30,371 psi | 75% | 2195 fps | 96.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 31,372 psi | 77% | 2234 fps | 95.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,243 psi | 82% | 2165 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 31,401 psi | 77% | 2201 fps | 96.2% |
| Somchem S365 | 35.7 gr | 86% | 27,238 psi | 67% | 2182 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 80% | 26,672 psi | 66% | 2073 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 98% | 33,141 psi | 82% | 2352 fps | 95.7% |
| Winchester 6.5 StaBALL | 37.8 gr | 84% | 30,443 psi | 75% | 2172 fps | 95.5% |
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 48 powders for 7 x 72 R loaded with the .284 | 160gr | Alaska Bullet Works Kodiak SP SPBC. Alliant Reloder-26 delivers the highest muzzle velocity at 2,454 fps; across all powders the maximum-charge window runs from 1,535 fps to 2,454 fps. Accurate 3100 gives the best case fill at 100 %, and 48 of the 48 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 | Alaska Bullet Works Kodiak SP SPBC they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, Alliant Reloder-26, Bofors RP7 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.