Load Specifications
Load data in caliber 7 x 72 R with .284 | 168gr | TWENTY-NINE ERTP bullet and 31 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, Alliant Reloder-17 and Hodgdon Hybrid 100V.
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 2495 | <<locked>> | 82% | 35,099 psi | 86% | 2172 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 35,244 psi | 87% | 2201 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 84% | 35,853 psi | 88% | 2172 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 34,693 psi | 85% | 2188 fps | 97.6% |
| Alliant Reloder-15 | <<locked>> | 82% | 35,041 psi | 86% | 2195 fps | 96.1% |
| Alliant Reloder-17 | <<locked>> | 90% | 36,550 psi | 90% | 2303 fps | 97.5% |
| Bofors RP3 | <<locked>> | 86% | 36,245 psi | 89% | 2234 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 35,549 psi | 88% | 2224 fps | 97.2% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 35,447 psi | 87% | 2238 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,621 psi | 85% | 1447 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 35,099 psi | 86% | 2152 fps | 96.1% |
| IMR 4831 | <<locked>> | 96% | 36,608 psi | 90% | 2264 fps | 95.9% |
| IMR 4895 | <<locked>> | 82% | 35,839 psi | 88% | 2221 fps | 97.1% |
| Lovex S062 | <<locked>> | 82% | 34,809 psi | 86% | 2162 fps | 98% |
| Norma 203B | <<locked>> | 82% | 34,432 psi | 85% | 2185 fps | 96.6% |
| Ramshot Big Game | <<locked>> | 84% | 36,216 psi | 89% | 2241 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,751 psi | 86% | 1480 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 36,085 psi | 89% | 2274 fps | 96.5% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 36,521 psi | 90% | 2313 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 82% | 36,651 psi | 90% | 2175 fps | 98.3% |
| Rottweil R 903 | <<locked>> | 88% | 36,201 psi | 89% | 2228 fps | 97.8% |
| Shooters World Precision | <<locked>> | 82% | 34,809 psi | 86% | 2162 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 35,491 psi | 87% | 2231 fps | 96.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 35,375 psi | 87% | 2113 fps | 99.9% |
| Somchem S355 | <<locked>> | 86% | 35,099 psi | 86% | 2188 fps | 97.3% |
| Somchem S365 | <<locked>> | 98% | 36,593 psi | 90% | 2310 fps | 98.9% |
| Vihtavuori N135 | <<locked>> | 82% | 35,679 psi | 88% | 2169 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 36,521 psi | 90% | 2175 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 88% | 35,592 psi | 88% | 2182 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 82% | 35,056 psi | 86% | 2165 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 36,651 psi | 90% | 2208 fps | 97.5% |
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 2495 | <<locked>> | 80% | 32,677 psi | 80% | 2126 fps | 100% |
| Accurate 4064 | <<locked>> | 80% | 30,951 psi | 76% | 2113 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 82% | 33,518 psi | 83% | 2126 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 30,429 psi | 75% | 2100 fps | 96.2% |
| Alliant Reloder-15 | <<locked>> | 80% | 33,011 psi | 81% | 2149 fps | 95.4% |
| Alliant Reloder-17 | 33.7 gr | 86% | 32,097 psi | 79% | 2198 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 29,646 psi | 73% | 2096 fps | 96.1% |
| Hodgdon Hybrid 100V | 33.2 gr | 92% | 31,372 psi | 77% | 2133 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 33,170 psi | 82% | 2188 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,759 psi | 63% | 1293 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 33,069 psi | 81% | 2110 fps | 95.4% |
| IMR 4831 | <<locked>> | 94% | 34,519 psi | 85% | 2224 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 33,750 psi | 83% | 2178 fps | 96.4% |
| Lovex S062 | <<locked>> | 80% | 32,793 psi | 81% | 2119 fps | 97.4% |
| Norma 203B | <<locked>> | 80% | 32,416 psi | 80% | 2142 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 80% | 31,763 psi | 78% | 2142 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,991 psi | 64% | 1325 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 33,953 psi | 84% | 2228 fps | 95.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 28,108 psi | 69% | 2106 fps | 96.6% |
| Rottweil R 902 | <<locked>> | 80% | 34,534 psi | 85% | 2133 fps | 97.8% |
| Rottweil R 903 | <<locked>> | 80% | 28,036 psi | 69% | 2051 fps | 95% |
| Shooters World Precision | <<locked>> | 80% | 32,793 psi | 81% | 2119 fps | 97.4% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 31,111 psi | 77% | 2133 fps | 95% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,241 psi | 77% | 2034 fps | 99.5% |
| Somchem S355 | <<locked>> | 80% | 29,051 psi | 72% | 2057 fps | 95.1% |
| Somchem S365 | 32.7 gr | 88% | 26,948 psi | 66% | 2080 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 80% | 33,460 psi | 82% | 2129 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 34,389 psi | 85% | 2136 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 80% | 27,659 psi | 68% | 2011 fps | 96.1% |
| Vihtavuori N540 | <<locked>> | 80% | 32,764 psi | 81% | 2119 fps | 99.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 30,298 psi | 75% | 2073 fps | 95% |
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 31 powders for 7 x 72 R loaded with the .284 | 168gr | TWENTY-NINE ERTP. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,313 fps; across all powders the maximum-charge window runs from 1,447 fps to 2,313 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 31 of the 31 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 168.0 gr projectile in 0.284" calls for a 1:8.0 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, Alliant Reloder-17, Hodgdon Hybrid 100V rank at the top here: for 7 x 72 R with the .284 | 168gr | TWENTY-NINE ERTP 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.