Load Specifications
Load data in caliber 7 x 72 R with .284 | 142gr | Lehigh Defense Controlled Chaos bullet and 25 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, 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 2495 | <<locked>> | 84% | 34,983 psi | 86% | 2402 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 35,128 psi | 87% | 2428 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 34,650 psi | 85% | 2411 fps | 96.2% |
| Bofors RP3 | <<locked>> | 88% | 36,347 psi | 90% | 2464 fps | 96.9% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 35,810 psi | 88% | 2467 fps | 96.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,055 psi | 84% | 1608 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 36,216 psi | 89% | 2408 fps | 96.1% |
| IMR 3031 | <<locked>> | 82% | 36,100 psi | 89% | 2461 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 82% | 35,143 psi | 87% | 2418 fps | 98.3% |
| Lovex S062 | <<locked>> | 84% | 34,911 psi | 86% | 2385 fps | 96.7% |
| Norma 201 | <<locked>> | 82% | 36,579 psi | 90% | 2402 fps | 97.1% |
| Norma 202 | <<locked>> | 82% | 36,550 psi | 90% | 2421 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,403 psi | 85% | 1650 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 34,476 psi | 85% | 2480 fps | 97.6% |
| Rottweil R 902 | <<locked>> | 82% | 34,722 psi | 86% | 2356 fps | 96.5% |
| Rottweil R 903 | <<locked>> | 90% | 36,289 psi | 89% | 2454 fps | 96.5% |
| Shooters World Match Rifle | <<locked>> | 82% | 35,143 psi | 87% | 2418 fps | 98.3% |
| Shooters World Precision | <<locked>> | 84% | 34,911 psi | 86% | 2385 fps | 96.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 35,694 psi | 88% | 2339 fps | 99.5% |
| Somchem S355 | <<locked>> | 88% | 35,259 psi | 87% | 2415 fps | 95.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 36,608 psi | 90% | 2530 fps | 97.5% |
| Vihtavuori N135 | <<locked>> | 84% | 35,607 psi | 88% | 2402 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 34,563 psi | 85% | 2359 fps | 99% |
| Vihtavuori N150 | <<locked>> | 90% | 35,839 psi | 88% | 2405 fps | 97.5% |
| Vihtavuori N540 | <<locked>> | 84% | 35,360 psi | 87% | 2395 fps | 98.7% |
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% | 30,603 psi | 75% | 2306 fps | 99.7% |
| Accurate 4064 | <<locked>> | 80% | 28,993 psi | 71% | 2283 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 32,518 psi | 80% | 2362 fps | 95.4% |
| Bofors RP3 | <<locked>> | 84% | 31,662 psi | 78% | 2359 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 33,431 psi | 82% | 2408 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,382 psi | 63% | 1440 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,026 psi | 84% | 2359 fps | 95.3% |
| IMR 3031 | <<locked>> | 80% | 33,750 psi | 83% | 2411 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 32,938 psi | 81% | 2372 fps | 97.8% |
| Lovex S062 | <<locked>> | 80% | 30,792 psi | 76% | 2287 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 34,345 psi | 85% | 2356 fps | 96.5% |
| Norma 202 | <<locked>> | 80% | 34,287 psi | 84% | 2372 fps | 98.7% |
| ReloadSwiss RS 14 | 11.2 gr | 80% | 25,498 psi | 63% | 1473 fps | 100% |
| ReloadSwiss RS 60 | 35.9 gr | 84% | 30,327 psi | 75% | 2369 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 32,619 psi | 80% | 2306 fps | 95.8% |
| Rottweil R 903 | <<locked>> | 88% | 33,982 psi | 84% | 2405 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,938 psi | 81% | 2372 fps | 97.8% |
| Shooters World Precision | <<locked>> | 80% | 30,792 psi | 76% | 2287 fps | 95.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,356 psi | 72% | 2201 fps | 98.2% |
| Somchem S355 | <<locked>> | 86% | 33,112 psi | 82% | 2365 fps | 95% |
| Somchem S365 | <<locked>> | 94% | 30,472 psi | 75% | 2375 fps | 95% |
| Vihtavuori N135 | <<locked>> | 80% | 31,169 psi | 77% | 2306 fps | 99.7% |
| Vihtavuori N140 | <<locked>> | 80% | 32,430 psi | 80% | 2313 fps | 98.5% |
| Vihtavuori N150 | 33.9 gr | 84% | 29,588 psi | 73% | 2264 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 30,995 psi | 76% | 2297 fps | 97.6% |
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 | 142gr | Lehigh Defense Controlled Chaos. Somchem S365 delivers the highest muzzle velocity at 2,530 fps; across all powders the maximum-charge window runs from 1,608 fps to 2,530 fps. Hodgdon TrailBoss 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 75–90 %, leaving at least 10 % headroom. The 142.0 gr projectile in 0.284" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, Somchem S365 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. ReloadSwiss RS 60, Vihtavuori N150, ReloadSwiss RS 14 rank at the top here: for 7 x 72 R with the .284 | 142gr | Lehigh Defense Controlled Chaos they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 4350, ADI AR 2208, Alliant Power Pro 2000-MR 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.