Load Specifications
Load data in caliber 7 x 72 R with .284 | 100gr | Barnes Solid bullet and 16 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 3031, Vihtavuori N135 and Accurate 2495.
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>> | 84% | 35,578 psi | 88% | 2822 fps | 98.4% |
| Accurate 2495 | <<locked>> | 92% | 35,723 psi | 88% | 2894 fps | 98.8% |
| Accurate 4064 | <<locked>> | 94% | 35,810 psi | 88% | 2910 fps | 96.6% |
| Alliant AR-Comp | <<locked>> | 86% | 34,867 psi | 86% | 2897 fps | 99.9% |
| Hodgdon H322 | <<locked>> | 84% | 36,419 psi | 90% | 2884 fps | 97.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,837 psi | 81% | 1949 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 36,492 psi | 90% | 2949 fps | 98% |
| Norma 202 | <<locked>> | 88% | 36,172 psi | 89% | 2874 fps | 96.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,851 psi | 81% | 1995 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 36,666 psi | 90% | 2792 fps | 96% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 35,418 psi | 87% | 2782 fps | 96.9% |
| Somchem S335 | <<locked>> | 86% | 35,592 psi | 88% | 2789 fps | 96.7% |
| Vihtavuori N130 | <<locked>> | 82% | 36,056 psi | 89% | 2792 fps | 99.1% |
| Vihtavuori N133 | <<locked>> | 88% | 35,795 psi | 88% | 2799 fps | 98.4% |
| Vihtavuori N135 | <<locked>> | 90% | 34,403 psi | 85% | 2851 fps | 98.4% |
| Vihtavuori N140 | <<locked>> | 90% | 36,042 psi | 89% | 2848 fps | 96.4% |
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% | 31,357 psi | 77% | 2710 fps | 97.2% |
| Accurate 2495 | 36 gr | 82% | 25,643 psi | 63% | 2612 fps | 95.3% |
| Accurate 4064 | <<locked>> | 90% | 31,531 psi | 78% | 2799 fps | 95% |
| Alliant AR-Comp | <<locked>> | 80% | 28,718 psi | 71% | 2726 fps | 98.7% |
| Hodgdon H322 | <<locked>> | 80% | 32,155 psi | 79% | 2769 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,265 psi | 60% | 1745 fps | 100% |
| IMR 3031 | 36 gr | 86% | 30,327 psi | 75% | 2776 fps | 95.8% |
| Norma 202 | <<locked>> | 86% | 33,866 psi | 83% | 2815 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,134 psi | 59% | 1781 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 34,316 psi | 85% | 2733 fps | 95.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 31,314 psi | 77% | 2674 fps | 95.4% |
| Somchem S335 | <<locked>> | 82% | 31,589 psi | 78% | 2684 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 33,750 psi | 83% | 2736 fps | 98.6% |
| Vihtavuori N133 | <<locked>> | 80% | 28,036 psi | 69% | 2589 fps | 95.8% |
| Vihtavuori N135 | 34.8 gr | 82% | 26,861 psi | 66% | 2635 fps | 95.6% |
| Vihtavuori N140 | <<locked>> | 88% | 33,750 psi | 83% | 2792 fps | 95.6% |
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 44 powders for 7 x 72 R loaded with the .284 | 100gr | Barnes Solid. IMR 3031 delivers the highest muzzle velocity at 2,949 fps; across all powders the maximum-charge window runs from 1,949 fps to 2,949 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 44 of the 44 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 100.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, Vihtavuori N150 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, Vihtavuori N135, Accurate 2495 rank at the top here: for 7 x 72 R with the .284 | 100gr | Barnes Solid they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2520, ADI Benchmark 8208, Alliant Reloder- TS 15.5 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.