Load Specifications
Load data in caliber 7 x 72 R with .284 | 130gr | Speer FN bullet and 19 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Somchem S365, Vihtavuori N150 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 4064 | <<locked>> | 84% | 36,521 psi | 90% | 2612 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 35,737 psi | 88% | 2592 fps | 96.5% |
| Bofors RP3 | <<locked>> | 84% | 35,157 psi | 87% | 2592 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 36,680 psi | 90% | 2628 fps | 96.1% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 36,506 psi | 90% | 2644 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,548 psi | 85% | 1759 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 36,332 psi | 89% | 2572 fps | 96.2% |
| IMR 3031 | <<locked>> | 82% | 36,187 psi | 89% | 2621 fps | 99.9% |
| Lovex S062 | <<locked>> | 82% | 35,737 psi | 88% | 2559 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,809 psi | 86% | 1801 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 35,346 psi | 87% | 2671 fps | 98.1% |
| Rottweil R 903 | <<locked>> | 86% | 35,056 psi | 86% | 2582 fps | 96.1% |
| Shooters World Precision | <<locked>> | 82% | 35,737 psi | 88% | 2559 fps | 97% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 36,056 psi | 89% | 2507 fps | 99.6% |
| Somchem S355 | <<locked>> | 86% | 36,303 psi | 89% | 2595 fps | 96.2% |
| Somchem S365 | <<locked>> | 96% | 35,781 psi | 88% | 2677 fps | 97.4% |
| Vihtavuori N135 | <<locked>> | 82% | 36,637 psi | 90% | 2579 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 34,969 psi | 86% | 2546 fps | 97.3% |
| Vihtavuori N540 | <<locked>> | 82% | 36,724 psi | 90% | 2589 fps | 99.1% |
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 4064 | <<locked>> | 80% | 31,995 psi | 79% | 2503 fps | 98.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 33,344 psi | 82% | 2536 fps | 95.7% |
| Bofors RP3 | <<locked>> | 82% | 32,750 psi | 81% | 2533 fps | 95.6% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 34,505 psi | 85% | 2575 fps | 95.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 34,156 psi | 84% | 2589 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,643 psi | 63% | 1572 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,185 psi | 84% | 2523 fps | 95.4% |
| IMR 3031 | <<locked>> | 80% | 33,823 psi | 83% | 2572 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 33,591 psi | 83% | 2510 fps | 96.3% |
| ReloadSwiss RS 14 | 13.1 gr | 80% | 25,976 psi | 64% | 1614 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 29,051 psi | 72% | 2487 fps | 95.1% |
| Rottweil R 903 | <<locked>> | 84% | 32,880 psi | 81% | 2530 fps | 95.3% |
| Shooters World Precision | <<locked>> | 80% | 33,591 psi | 83% | 2510 fps | 96.3% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,981 psi | 79% | 2415 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 34,113 psi | 84% | 2543 fps | 95.4% |
| Somchem S365 | 43.5 gr | 92% | 31,502 psi | 78% | 2562 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 34,345 psi | 85% | 2533 fps | 100% |
| Vihtavuori N150 | 37.7 gr | 84% | 28,964 psi | 71% | 2395 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 34,301 psi | 84% | 2536 fps | 98.6% |
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 41 powders for 7 x 72 R loaded with the .284 | 130gr | Speer FN. Somchem S365 delivers the highest muzzle velocity at 2,677 fps; across all powders the maximum-charge window runs from 1,759 fps to 2,677 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 41 of the 41 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 79–90 %, leaving at least 10 % headroom. The 130.0 gr projectile in 0.284" calls for a 1:17.0 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, 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. Somchem S365, Vihtavuori N150, ReloadSwiss RS 14 rank at the top here: for 7 x 72 R with the .284 | 130gr | Speer FN 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.