Load Specifications
Load data in caliber 7 x 72 R with .284 | 155gr | Frontier PH HPFB bullet and 27 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, Vihtavuori N150 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>> | 84% | 34,940 psi | 86% | 2310 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 36,709 psi | 90% | 2346 fps | 97.7% |
| Alliant Reloder-17 | <<locked>> | 90% | 36,303 psi | 89% | 2411 fps | 96.8% |
| Bofors RP3 | <<locked>> | 86% | 35,911 psi | 88% | 2343 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 35,418 psi | 87% | 2333 fps | 96.5% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 35,215 psi | 87% | 2346 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,418 psi | 85% | 1532 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 35,288 psi | 87% | 2280 fps | 96.7% |
| IMR 3031 | <<locked>> | 82% | 34,940 psi | 86% | 2323 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 35,853 psi | 88% | 2336 fps | 96.5% |
| Lovex S062 | <<locked>> | 84% | 36,695 psi | 90% | 2313 fps | 98% |
| Norma 203B | <<locked>> | 84% | 36,695 psi | 90% | 2346 fps | 96.7% |
| Ramshot Big Game | <<locked>> | 84% | 36,013 psi | 89% | 2349 fps | 96.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,853 psi | 86% | 1572 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 36,390 psi | 90% | 2425 fps | 99.1% |
| Rottweil R 902 | <<locked>> | 82% | 36,608 psi | 90% | 2287 fps | 97.9% |
| Rottweil R 903 | <<locked>> | 88% | 36,100 psi | 89% | 2339 fps | 97.3% |
| Shooters World Precision | <<locked>> | 84% | 36,695 psi | 90% | 2313 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 35,346 psi | 87% | 2339 fps | 96% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 34,983 psi | 86% | 2218 fps | 99.8% |
| Somchem S355 | <<locked>> | 86% | 34,954 psi | 86% | 2300 fps | 96.7% |
| Somchem S365 | <<locked>> | 98% | 36,405 psi | 90% | 2421 fps | 98.4% |
| Vihtavuori N135 | <<locked>> | 82% | 35,375 psi | 87% | 2280 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 35,810 psi | 88% | 2277 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 92% | 35,795 psi | 88% | 2300 fps | 98.2% |
| Vihtavuori N540 | <<locked>> | 82% | 35,433 psi | 87% | 2293 fps | 99.3% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 36,405 psi | 90% | 2313 fps | 96.9% |
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% | 30,922 psi | 76% | 2221 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 30,124 psi | 74% | 2201 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 88% | 34,156 psi | 84% | 2359 fps | 96% |
| Bofors RP3 | <<locked>> | 80% | 29,472 psi | 73% | 2198 fps | 95.3% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 33,228 psi | 82% | 2283 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,069 psi | 81% | 2297 fps | 96.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,498 psi | 63% | 1368 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 33,098 psi | 82% | 2234 fps | 96% |
| IMR 3031 | <<locked>> | 80% | 32,866 psi | 81% | 2280 fps | 99.9% |
| IMR 4895 | <<locked>> | 80% | 33,605 psi | 83% | 2287 fps | 95.8% |
| Lovex S062 | <<locked>> | 80% | 32,547 psi | 80% | 2224 fps | 96.8% |
| Norma 203B | <<locked>> | 80% | 32,271 psi | 79% | 2247 fps | 95.2% |
| Ramshot Big Game | <<locked>> | 82% | 33,852 psi | 83% | 2300 fps | 95.4% |
| ReloadSwiss RS 14 | 10.9 gr | 80% | 25,672 psi | 63% | 1401 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 28,050 psi | 69% | 2208 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 34,316 psi | 85% | 2238 fps | 97.3% |
| Rottweil R 903 | <<locked>> | 82% | 29,631 psi | 73% | 2195 fps | 95% |
| Shooters World Precision | <<locked>> | 80% | 32,547 psi | 80% | 2224 fps | 96.8% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 32,967 psi | 81% | 2287 fps | 95.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,893 psi | 76% | 2133 fps | 99.2% |
| Somchem S355 | <<locked>> | 82% | 30,734 psi | 76% | 2205 fps | 95.2% |
| Somchem S365 | 35.7 gr | 90% | 28,601 psi | 70% | 2228 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 33,040 psi | 81% | 2234 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 33,518 psi | 83% | 2231 fps | 99.3% |
| Vihtavuori N150 | 31.6 gr | 84% | 28,007 psi | 69% | 2123 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 33,228 psi | 82% | 2247 fps | 98.9% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 32,082 psi | 79% | 2218 fps | 95.2% |
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 51 powders for 7 x 72 R loaded with the .284 | 155gr | Frontier PH HPFB. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,425 fps; across all powders the maximum-charge window runs from 1,532 fps to 2,425 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 51 of the 51 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 76–90 %, leaving at least 10 % headroom. The 155.0 gr projectile in 0.284" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-26, Hodgdon TrailBoss 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 N150, ReloadSwiss RS 14 rank at the top here: for 7 x 72 R with the .284 | 155gr | Frontier PH HPFB they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 4350, Alliant Power Pro 2000-MR, Alliant Reloder-16 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.