Load Specifications
Load data in caliber 7 x 72 R with .284 | 128gr | IBEX TRD bullet and 15 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, ReloadSwiss RS 14 and Hodgdon TrailBoss.
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% | 36,564 psi | 90% | 2552 fps | 99.9% |
| Accurate 4064 | <<locked>> | 86% | 36,709 psi | 90% | 2582 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,418 psi | 85% | 1719 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 36,230 psi | 89% | 2566 fps | 97.8% |
| Lovex S062 | <<locked>> | 84% | 36,100 psi | 89% | 2530 fps | 96% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,766 psi | 86% | 1762 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 35,375 psi | 87% | 2618 fps | 96.8% |
| Rottweil R 902 | <<locked>> | 82% | 35,882 psi | 88% | 2497 fps | 95.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 36,230 psi | 89% | 2566 fps | 97.8% |
| Shooters World Precision | <<locked>> | 84% | 36,100 psi | 89% | 2530 fps | 96% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 36,274 psi | 89% | 2474 fps | 99.1% |
| Vihtavuori N135 | <<locked>> | 84% | 36,477 psi | 90% | 2546 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 82% | 35,302 psi | 87% | 2497 fps | 98.5% |
| Vihtavuori N150 | <<locked>> | 90% | 36,709 psi | 90% | 2543 fps | 96.8% |
| Vihtavuori N540 | <<locked>> | 84% | 36,129 psi | 89% | 2533 fps | 98.2% |
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% | 32,474 psi | 80% | 2461 fps | 99.6% |
| Accurate 4064 | <<locked>> | 80% | 30,676 psi | 76% | 2438 fps | 97.3% |
| Hodgdon TrailBoss | 11.5 gr | 80% | 25,599 psi | 63% | 1532 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 34,156 psi | 84% | 2516 fps | 97.2% |
| Lovex S062 | <<locked>> | 82% | 33,881 psi | 83% | 2477 fps | 95.3% |
| ReloadSwiss RS 14 | 11.8 gr | 80% | 26,020 psi | 64% | 1575 fps | 100% |
| ReloadSwiss RS 60 | 38.6 gr | 86% | 33,272 psi | 82% | 2559 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 33,939 psi | 84% | 2451 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 34,156 psi | 84% | 2516 fps | 97.2% |
| Shooters World Precision | <<locked>> | 82% | 33,881 psi | 83% | 2477 fps | 95.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,400 psi | 75% | 2339 fps | 97.7% |
| Vihtavuori N135 | <<locked>> | 80% | 32,329 psi | 80% | 2454 fps | 99.5% |
| Vihtavuori N140 | <<locked>> | 80% | 33,098 psi | 82% | 2448 fps | 97.9% |
| Vihtavuori N150 | <<locked>> | 86% | 32,430 psi | 80% | 2444 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 32,053 psi | 79% | 2434 fps | 97.1% |
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 43 powders for 7 x 72 R loaded with the .284 | 128gr | IBEX TRD. ReloadSwiss RS 62 delivers the highest muzzle velocity at 2,628 fps; across all powders the maximum-charge window runs from 1,719 fps to 2,628 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 43 of the 43 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 128.0 gr projectile in 0.284" calls for a 1:11.0 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. ReloadSwiss RS 60, ReloadSwiss RS 14, Hodgdon TrailBoss rank at the top here: for 7 x 72 R with the .284 | 128gr | IBEX TRD 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.