Load Specifications
Load data in caliber 7 x 72 R with .284 | 127gr | Hasler Hunting bullet and 21 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Accurate 4064 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>> | 82% | 34,954 psi | 86% | 2572 fps | 99.8% |
| Accurate 2520 | <<locked>> | 82% | 34,330 psi | 85% | 2562 fps | 97.3% |
| Accurate 4064 | <<locked>> | 88% | 35,636 psi | 88% | 2592 fps | 98.7% |
| Alliant AR-Comp | <<locked>> | 82% | 36,042 psi | 89% | 2595 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 36,637 psi | 90% | 2618 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,765 psi | 83% | 1722 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 35,650 psi | 88% | 2612 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 84% | 35,940 psi | 89% | 2589 fps | 97.7% |
| Lovex S062 | <<locked>> | 86% | 35,491 psi | 87% | 2543 fps | 95.8% |
| Norma 202 | <<locked>> | 82% | 34,998 psi | 86% | 2539 fps | 98.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,997 psi | 84% | 1762 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 35,215 psi | 87% | 2638 fps | 96.6% |
| Shooters World Match Rifle | <<locked>> | 84% | 35,940 psi | 89% | 2589 fps | 97.7% |
| Shooters World Precision | <<locked>> | 86% | 35,491 psi | 87% | 2543 fps | 95.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 36,419 psi | 90% | 2503 fps | 99.1% |
| Somchem S335 | <<locked>> | 82% | 36,405 psi | 90% | 2503 fps | 99% |
| Vihtavuori N133 | <<locked>> | 84% | 36,535 psi | 90% | 2503 fps | 99.8% |
| Vihtavuori N135 | <<locked>> | 86% | 34,751 psi | 86% | 2549 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 84% | 34,693 psi | 85% | 2513 fps | 98.3% |
| Vihtavuori N150 | <<locked>> | 96% | 36,492 psi | 90% | 2569 fps | 96.7% |
| Vihtavuori N540 | <<locked>> | 84% | 34,389 psi | 85% | 2530 fps | 97.8% |
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% | 32,489 psi | 80% | 2516 fps | 99.4% |
| Accurate 2520 | <<locked>> | 80% | 31,952 psi | 79% | 2507 fps | 96.5% |
| Accurate 4064 | 33.5 gr | 80% | 27,441 psi | 68% | 2385 fps | 96% |
| Alliant AR-Comp | <<locked>> | 80% | 33,852 psi | 83% | 2549 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 31,850 psi | 78% | 2507 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,237 psi | 62% | 1542 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 29,501 psi | 73% | 2457 fps | 98.2% |
| Lovex D073.6 | <<locked>> | 80% | 31,285 psi | 77% | 2477 fps | 96.2% |
| Lovex S062 | <<locked>> | 84% | 33,402 psi | 82% | 2493 fps | 95% |
| Norma 202 | <<locked>> | 80% | 32,706 psi | 81% | 2484 fps | 97.4% |
| ReloadSwiss RS 14 | 11.8 gr | 80% | 25,266 psi | 62% | 1578 fps | 100% |
| ReloadSwiss RS 60 | 39.6 gr | 88% | 33,257 psi | 82% | 2585 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 31,285 psi | 77% | 2477 fps | 96.2% |
| Shooters World Precision | <<locked>> | 84% | 33,402 psi | 82% | 2493 fps | 95% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 28,181 psi | 69% | 2310 fps | 96.9% |
| Somchem S335 | <<locked>> | 80% | 34,084 psi | 84% | 2451 fps | 98.5% |
| Vihtavuori N133 | <<locked>> | 80% | 32,561 psi | 80% | 2415 fps | 99.3% |
| Vihtavuori N135 | <<locked>> | 80% | 28,471 psi | 70% | 2398 fps | 98.7% |
| Vihtavuori N140 | <<locked>> | 80% | 30,516 psi | 75% | 2411 fps | 97.1% |
| Vihtavuori N150 | <<locked>> | 92% | 32,300 psi | 80% | 2474 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 30,313 psi | 75% | 2428 fps | 96.5% |
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 21 powders for 7 x 72 R loaded with the .284 | 127gr | Hasler Hunting. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,638 fps; across all powders the maximum-charge window runs from 1,722 fps to 2,638 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 21 of the 21 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 127.0 gr projectile in 0.284" calls for a 1:10.5 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, Accurate 4064, ReloadSwiss RS 14 rank at the top here: for 7 x 72 R with the .284 | 127gr | Hasler Hunting 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.