Load Specifications
Load data in caliber 7 x 72 R with .284 | 125gr | Lehigh Defense Controlled Chaos bullet and 20 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate 4064, SNPE Vectan Tubal 5000 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>> | 86% | 34,476 psi | 85% | 2562 fps | 99.7% |
| Accurate 2520 | <<locked>> | 82% | 34,664 psi | 85% | 2575 fps | 97.1% |
| Accurate 4064 | <<locked>> | 90% | 36,738 psi | 90% | 2631 fps | 98.7% |
| Alliant AR-Comp | <<locked>> | 82% | 35,012 psi | 86% | 2592 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,808 psi | 83% | 1732 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 34,925 psi | 86% | 2608 fps | 99.3% |
| Lovex D073.6 | <<locked>> | 84% | 34,954 psi | 86% | 2582 fps | 97.2% |
| Norma 201 | <<locked>> | 84% | 36,390 psi | 90% | 2562 fps | 95.8% |
| Norma 202 | <<locked>> | 84% | 36,245 psi | 89% | 2582 fps | 98.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,026 psi | 84% | 1775 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 36,695 psi | 90% | 2562 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 84% | 34,954 psi | 86% | 2582 fps | 97.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 36,289 psi | 89% | 2497 fps | 98% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 35,505 psi | 87% | 2500 fps | 98.8% |
| Somchem S335 | <<locked>> | 82% | 35,534 psi | 88% | 2500 fps | 98.6% |
| Vihtavuori N133 | <<locked>> | 84% | 35,882 psi | 88% | 2503 fps | 99.6% |
| Vihtavuori N135 | <<locked>> | 86% | 35,230 psi | 87% | 2566 fps | 99.7% |
| Vihtavuori N140 | <<locked>> | 86% | 35,911 psi | 88% | 2556 fps | 98.4% |
| Vihtavuori N150 | <<locked>> | 96% | 35,578 psi | 88% | 2566 fps | 96.1% |
| Vihtavuori N540 | <<locked>> | 86% | 35,592 psi | 88% | 2572 fps | 97.9% |
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 2495 | <<locked>> | 80% | 28,239 psi | 70% | 2408 fps | 98.5% |
| Accurate 2520 | <<locked>> | 80% | 32,300 psi | 80% | 2520 fps | 96.3% |
| Accurate 4064 | 33.2 gr | 80% | 26,760 psi | 66% | 2379 fps | 95.4% |
| Alliant AR-Comp | <<locked>> | 80% | 32,837 psi | 81% | 2543 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,918 psi | 61% | 1545 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 28,819 psi | 71% | 2451 fps | 97.7% |
| Lovex D073.6 | <<locked>> | 80% | 30,342 psi | 75% | 2467 fps | 95.5% |
| Norma 201 | <<locked>> | 82% | 34,258 psi | 84% | 2513 fps | 95% |
| Norma 202 | <<locked>> | 80% | 31,821 psi | 78% | 2477 fps | 96.9% |
| ReloadSwiss RS 14 | 11.6 gr | 80% | 24,918 psi | 61% | 1581 fps | 100% |
| Rottweil R 902 | <<locked>> | 84% | 34,519 psi | 85% | 2510 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 30,342 psi | 75% | 2467 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 34,113 psi | 84% | 2448 fps | 97.5% |
| SNPE Vectan Tubal 5000 | 32.1 gr | 80% | 27,630 psi | 68% | 2306 fps | 96.4% |
| Somchem S335 | <<locked>> | 80% | 33,489 psi | 82% | 2451 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 80% | 31,662 psi | 78% | 2408 fps | 99% |
| Vihtavuori N135 | <<locked>> | 80% | 29,022 psi | 71% | 2418 fps | 98.6% |
| Vihtavuori N140 | <<locked>> | 80% | 29,660 psi | 73% | 2405 fps | 96.5% |
| Vihtavuori N150 | <<locked>> | 94% | 33,417 psi | 82% | 2513 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 29,501 psi | 73% | 2421 fps | 95.8% |
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 20 powders for 7 x 72 R loaded with the .284 | 125gr | Lehigh Defense Controlled Chaos. Accurate 4064 delivers the highest muzzle velocity at 2,631 fps; across all powders the maximum-charge window runs from 1,732 fps to 2,631 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 20 of the 20 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 83–90 %, leaving at least 10 % headroom. The 125.0 gr projectile in 0.284" calls for a 1:10.0 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. Accurate 4064, SNPE Vectan Tubal 5000, ReloadSwiss RS 14 rank at the top here: for 7 x 72 R with the .284 | 125gr | Lehigh Defense Controlled Chaos 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.