Load Specifications
Load data in caliber 7 x 72 R with .284 | 127gr | Geco ZERO LG bullet and 22 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 3031, Accurate 4064 and Vihtavuori N135.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 25.6"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 82% | 35,070 psi | 86% | 2480 fps | 99.5% |
| Accurate 2495 | <<locked>> | 86% | 36,637 psi | 90% | 2589 fps | 99.8% |
| Accurate 2520 | <<locked>> | 84% | 34,127 psi | 84% | 2533 fps | 96.8% |
| Accurate 4064 | <<locked>> | 90% | 34,925 psi | 86% | 2556 fps | 98.2% |
| Alliant AR-Comp | <<locked>> | 84% | 35,868 psi | 88% | 2572 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 36,390 psi | 90% | 2589 fps | 96.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,344 psi | 82% | 1686 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 35,534 psi | 88% | 2582 fps | 99.3% |
| Lovex D073.6 | <<locked>> | 86% | 35,462 psi | 87% | 2556 fps | 97.2% |
| Norma 202 | <<locked>> | 84% | 34,693 psi | 85% | 2507 fps | 97.6% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,576 psi | 83% | 1729 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 36,303 psi | 89% | 2503 fps | 97.7% |
| Shooters World Match Rifle | <<locked>> | 86% | 35,462 psi | 87% | 2556 fps | 97.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 34,940 psi | 86% | 2425 fps | 97.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 36,071 psi | 89% | 2470 fps | 98.7% |
| Somchem S335 | <<locked>> | 84% | 36,216 psi | 89% | 2474 fps | 98.6% |
| Vihtavuori N133 | <<locked>> | 86% | 36,724 psi | 90% | 2480 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 90% | 36,724 psi | 90% | 2569 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 86% | 34,476 psi | 85% | 2484 fps | 97.9% |
| Vihtavuori N150 | <<locked>> | 98% | 36,114 psi | 89% | 2536 fps | 96.1% |
| Vihtavuori N540 | <<locked>> | 88% | 36,535 psi | 90% | 2552 fps | 98% |
| Winchester 748 | <<locked>> | 82% | 36,608 psi | 90% | 2585 fps | 96.5% |
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 2015 | <<locked>> | 80% | 33,040 psi | 81% | 2438 fps | 99.2% |
| Accurate 2495 | <<locked>> | 80% | 30,081 psi | 74% | 2438 fps | 98.7% |
| Accurate 2520 | <<locked>> | 80% | 29,515 psi | 73% | 2421 fps | 95% |
| Accurate 4064 | 32.3 gr | 82% | 27,137 psi | 67% | 2356 fps | 95.4% |
| Alliant AR-Comp | <<locked>> | 80% | 31,372 psi | 77% | 2470 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 34,084 psi | 84% | 2536 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,671 psi | 61% | 1506 fps | 100% |
| IMR 3031 | 30.1 gr | 80% | 27,688 psi | 68% | 2382 fps | 97% |
| Lovex D073.6 | <<locked>> | 82% | 31,096 psi | 77% | 2451 fps | 95.7% |
| Norma 202 | <<locked>> | 80% | 30,487 psi | 75% | 2405 fps | 96.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,700 psi | 61% | 1542 fps | 100% |
| Rottweil R 901 | <<locked>> | 80% | 34,403 psi | 85% | 2457 fps | 97.2% |
| Shooters World Match Rifle | <<locked>> | 82% | 31,096 psi | 77% | 2451 fps | 95.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 32,721 psi | 81% | 2375 fps | 96.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 26,498 psi | 65% | 2238 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 32,213 psi | 79% | 2382 fps | 97.6% |
| Vihtavuori N133 | <<locked>> | 80% | 30,429 psi | 75% | 2339 fps | 98.5% |
| Vihtavuori N135 | 30.4 gr | 80% | 26,411 psi | 65% | 2323 fps | 97.7% |
| Vihtavuori N140 | <<locked>> | 80% | 28,442 psi | 70% | 2336 fps | 95.7% |
| Vihtavuori N150 | <<locked>> | 96% | 33,881 psi | 83% | 2484 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 28,152 psi | 69% | 2349 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 34,113 psi | 84% | 2526 fps | 95.7% |
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 56 powders for 7 x 72 R loaded with the .284 | 127gr | Geco ZERO LG. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,605 fps; across all powders the maximum-charge window runs from 1,686 fps to 2,605 fps. Accurate 4350 gives the best case fill at 100 %, and 56 of the 56 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 81–90 %, leaving at least 10 % headroom. The 127.0 gr projectile in 0.284" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 4350, Hodgdon Hybrid 100V, Hodgdon TrailBoss 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. IMR 3031, Accurate 4064, Vihtavuori N135 rank at the top here: for 7 x 72 R with the .284 | 127gr | Geco ZERO LG they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 4350, ADI AR 2206H, ADI AR 2208 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.