Load Specifications
Load data in caliber 7 x 72 R with .284 | 165gr | Remington SP Core-Lokt bullet and 21 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, Vihtavuori N555 and Alliant Reloder-23.
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>> | 90% | 36,608 psi | 90% | 2359 fps | 96.8% |
| Alliant Reloder-16 | <<locked>> | 88% | 34,882 psi | 86% | 2320 fps | 96.2% |
| Alliant Reloder-17 | <<locked>> | 86% | 36,521 psi | 90% | 2388 fps | 98.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,534 psi | 88% | 2369 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 36,013 psi | 89% | 2316 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,041 psi | 86% | 1526 fps | 100% |
| IMR 4831 | <<locked>> | 94% | 36,172 psi | 89% | 2333 fps | 96.7% |
| Norma URP | <<locked>> | 88% | 34,751 psi | 86% | 2310 fps | 96% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,534 psi | 88% | 1565 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 36,448 psi | 90% | 2395 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 36,274 psi | 89% | 2372 fps | 96.3% |
| Rottweil R 903 | <<locked>> | 82% | 34,490 psi | 85% | 2264 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 35,694 psi | 88% | 2313 fps | 97.6% |
| Somchem S355 | <<locked>> | 82% | 35,462 psi | 87% | 2270 fps | 98.1% |
| Somchem S365 | <<locked>> | 92% | 35,157 psi | 87% | 2362 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 88% | 36,347 psi | 90% | 2267 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 86% | 35,563 psi | 88% | 2290 fps | 96.1% |
| Vihtavuori N550 | <<locked>> | 86% | 35,752 psi | 88% | 2329 fps | 96.2% |
| Vihtavuori N555 | <<locked>> | 98% | 35,897 psi | 88% | 2392 fps | 97.3% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 36,564 psi | 90% | 2293 fps | 98.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 31,792 psi | 78% | 2356 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 4350 | <<locked>> | 86% | 31,749 psi | 78% | 2254 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 86% | 32,924 psi | 81% | 2270 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 30,037 psi | 74% | 2228 fps | 96% |
| Alliant Reloder-23 | 39.7 gr | 94% | 29,762 psi | 73% | 2228 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 28,210 psi | 69% | 2133 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,092 psi | 64% | 1362 fps | 100% |
| IMR 4831 | <<locked>> | 90% | 31,792 psi | 78% | 2238 fps | 95.1% |
| Norma URP | <<locked>> | 86% | 32,503 psi | 80% | 2257 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,600 psi | 66% | 1401 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 31,995 psi | 79% | 2290 fps | 99.1% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 33,968 psi | 84% | 2320 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 80% | 32,460 psi | 80% | 2218 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,417 psi | 82% | 2264 fps | 96.9% |
| Somchem S355 | <<locked>> | 80% | 33,388 psi | 82% | 2224 fps | 97.5% |
| Somchem S365 | 35.2 gr | 82% | 25,672 psi | 63% | 2116 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 80% | 28,514 psi | 70% | 2096 fps | 97.3% |
| Vihtavuori N160 | <<locked>> | 84% | 33,286 psi | 82% | 2241 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 84% | 33,678 psi | 83% | 2283 fps | 95.4% |
| Vihtavuori N555 | 39.8 gr | 94% | 31,633 psi | 78% | 2293 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 28,282 psi | 70% | 2100 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 98% | 29,834 psi | 73% | 2297 fps | 96.2% |
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 21 powders for 7 x 72 R loaded with the .284 | 165gr | Remington SP Core-Lokt. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,395 fps; across all powders the maximum-charge window runs from 1,526 fps to 2,395 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 21 of the 21 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 78–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.284" calls for a 1:12.5 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, Vihtavuori N555, Alliant Reloder-23 rank at the top here: for 7 x 72 R with the .284 | 165gr | Remington SP Core-Lokt 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.