Load Specifications
Load data in caliber 7 x 72 R with .284 | 120gr | Barnes TTSX BT 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, Vihtavuori N135 and Vihtavuori N540.
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 2015 | <<locked>> | 82% | 36,013 psi | 89% | 2595 fps | 99.6% |
| Accurate 2495 | <<locked>> | 90% | 36,492 psi | 90% | 2674 fps | 99.8% |
| Accurate 2520 | <<locked>> | 84% | 36,622 psi | 90% | 2671 fps | 97.4% |
| Accurate 4064 | <<locked>> | 92% | 36,492 psi | 90% | 2694 fps | 98.4% |
| Alliant AR-Comp | <<locked>> | 84% | 35,491 psi | 87% | 2671 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,417 psi | 82% | 1772 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 36,201 psi | 89% | 2703 fps | 99.3% |
| Lovex D073.6 | <<locked>> | 86% | 35,012 psi | 86% | 2648 fps | 96.9% |
| Norma 202 | <<locked>> | 86% | 36,651 psi | 90% | 2654 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,185 psi | 82% | 1808 fps | 100% |
| Rottweil R 901 | <<locked>> | 82% | 35,505 psi | 87% | 2592 fps | 97.4% |
| Shooters World Match Rifle | <<locked>> | 86% | 35,012 psi | 86% | 2648 fps | 96.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 36,724 psi | 90% | 2569 fps | 97.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 35,795 psi | 88% | 2566 fps | 98.6% |
| Somchem S335 | <<locked>> | 84% | 35,926 psi | 88% | 2572 fps | 98.4% |
| Vihtavuori N133 | <<locked>> | 84% | 36,593 psi | 90% | 2579 fps | 99.6% |
| Vihtavuori N135 | <<locked>> | 88% | 35,288 psi | 87% | 2631 fps | 99.6% |
| Vihtavuori N140 | <<locked>> | 86% | 34,606 psi | 85% | 2589 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 88% | 35,592 psi | 88% | 2621 fps | 97.5% |
| Winchester 748 | <<locked>> | 84% | 35,781 psi | 88% | 2667 fps | 96.1% |
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% | 33,533 psi | 83% | 2539 fps | 99.2% |
| Accurate 2495 | <<locked>> | 80% | 25,773 psi | 63% | 2405 fps | 97.4% |
| Accurate 2520 | <<locked>> | 80% | 31,734 psi | 78% | 2556 fps | 95.7% |
| Accurate 4064 | 35.3 gr | 84% | 28,036 psi | 69% | 2480 fps | 95.6% |
| Alliant AR-Comp | <<locked>> | 80% | 30,937 psi | 76% | 2562 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,598 psi | 61% | 1581 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 29,617 psi | 73% | 2536 fps | 97.6% |
| Lovex D073.6 | <<locked>> | 82% | 30,589 psi | 75% | 2536 fps | 95.2% |
| Norma 202 | <<locked>> | 80% | 30,124 psi | 74% | 2493 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,526 psi | 60% | 1617 fps | 100% |
| Rottweil R 901 | <<locked>> | 80% | 33,402 psi | 82% | 2539 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 30,589 psi | 75% | 2536 fps | 95.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 32,358 psi | 80% | 2467 fps | 96.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 26,107 psi | 64% | 2320 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 31,589 psi | 78% | 2467 fps | 97.3% |
| Vihtavuori N133 | <<locked>> | 80% | 32,256 psi | 79% | 2480 fps | 98.8% |
| Vihtavuori N135 | 32.5 gr | 80% | 27,108 psi | 67% | 2428 fps | 97.7% |
| Vihtavuori N140 | <<locked>> | 80% | 28,514 psi | 70% | 2431 fps | 95.6% |
| Vihtavuori N540 | 35.9 gr | 82% | 28,993 psi | 71% | 2457 fps | 95.1% |
| Winchester 748 | <<locked>> | 82% | 33,417 psi | 82% | 2612 fps | 95.2% |
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 | 120gr | Barnes TTSX BT. ReloadSwiss RS 52 delivers the highest muzzle velocity at 2,733 fps; across all powders the maximum-charge window runs from 1,772 fps to 2,733 fps. Hodgdon Hybrid 100V 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 80–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.284" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Hodgdon Hybrid 100V, 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, Vihtavuori N135, Vihtavuori N540 rank at the top here: for 7 x 72 R with the .284 | 120gr | Barnes TTSX BT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2206H, ADI AR 2208, ADI Benchmark 8208 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.