Load Specifications
Load data in caliber 7 x 72 R with .284 | 150gr | Sierra MatchKing bullet and 19 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 ReloadSwiss RS 14.
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% | 35,143 psi | 87% | 2379 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 36,506 psi | 90% | 2408 fps | 97.8% |
| Alliant Reloder-17 | <<locked>> | 88% | 36,071 psi | 89% | 2480 fps | 97.1% |
| Bofors RP3 | <<locked>> | 84% | 35,897 psi | 88% | 2411 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 35,288 psi | 87% | 2402 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,896 psi | 86% | 1601 fps | 100% |
| Lovex S062 | <<locked>> | 82% | 36,651 psi | 90% | 2382 fps | 98.2% |
| Norma 203B | <<locked>> | 82% | 36,274 psi | 89% | 2405 fps | 96.8% |
| Ramshot Big Game | <<locked>> | 82% | 35,665 psi | 88% | 2411 fps | 96.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,969 psi | 86% | 1637 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 36,042 psi | 89% | 2490 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 86% | 36,056 psi | 89% | 2408 fps | 97.5% |
| Shooters World Precision | <<locked>> | 82% | 36,651 psi | 90% | 2382 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 35,041 psi | 86% | 2405 fps | 96.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 34,708 psi | 85% | 2280 fps | 99.8% |
| Somchem S355 | <<locked>> | 84% | 34,809 psi | 86% | 2362 fps | 96.9% |
| Somchem S365 | <<locked>> | 96% | 36,579 psi | 90% | 2500 fps | 98.7% |
| Vihtavuori N150 | <<locked>> | 86% | 35,404 psi | 87% | 2356 fps | 98.3% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 36,013 psi | 89% | 2379 fps | 97.1% |
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% | 32,822 psi | 81% | 2326 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 32,126 psi | 79% | 2310 fps | 96.4% |
| Alliant Reloder-17 | <<locked>> | 84% | 31,705 psi | 78% | 2369 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 31,270 psi | 77% | 2306 fps | 96.3% |
| Hodgdon Hybrid 100V | 37.6 gr | 90% | 31,140 psi | 77% | 2303 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,686 psi | 63% | 1424 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 34,272 psi | 84% | 2329 fps | 97.5% |
| Norma 203B | <<locked>> | 80% | 34,171 psi | 84% | 2359 fps | 96.1% |
| Ramshot Big Game | <<locked>> | 80% | 33,417 psi | 82% | 2359 fps | 95.4% |
| ReloadSwiss RS 14 | 11.9 gr | 80% | 26,136 psi | 64% | 1463 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 29,704 psi | 73% | 2323 fps | 97% |
| Rottweil R 903 | <<locked>> | 80% | 29,559 psi | 73% | 2257 fps | 95.2% |
| Shooters World Precision | <<locked>> | 80% | 34,272 psi | 84% | 2329 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 32,808 psi | 81% | 2352 fps | 95.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 32,648 psi | 80% | 2238 fps | 99.6% |
| Somchem S355 | <<locked>> | 80% | 30,661 psi | 76% | 2267 fps | 95.3% |
| Somchem S365 | 37.8 gr | 88% | 28,384 psi | 70% | 2290 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 80% | 29,080 psi | 72% | 2211 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 31,778 psi | 78% | 2280 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 19 powders for 7 x 72 R loaded with the .284 | 150gr | Sierra MatchKing. Somchem S365 delivers the highest muzzle velocity at 2,500 fps; across all powders the maximum-charge window runs from 1,601 fps to 2,500 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 19 of the 19 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 85–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. 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, Hodgdon Hybrid 100V, ReloadSwiss RS 14 rank at the top here: for 7 x 72 R with the .284 | 150gr | Sierra MatchKing 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.