Load Specifications
Load data in caliber 7 x 72 R with .284 | 140gr | Peregrine VRG-3 bullet and 21 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% | 35,375 psi | 87% | 2477 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 34,751 psi | 86% | 2461 fps | 96.6% |
| Bofors RP3 | <<locked>> | 86% | 36,434 psi | 90% | 2513 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 35,781 psi | 88% | 2497 fps | 96.2% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 34,940 psi | 86% | 2503 fps | 96.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,635 psi | 85% | 1663 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 34,882 psi | 86% | 2434 fps | 96.1% |
| IMR 3031 | <<locked>> | 82% | 35,447 psi | 87% | 2493 fps | 99.9% |
| IMR 4895 | <<locked>> | 82% | 36,027 psi | 89% | 2497 fps | 96.1% |
| Lovex S062 | <<locked>> | 82% | 35,027 psi | 86% | 2434 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,650 psi | 85% | 1699 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 34,548 psi | 85% | 2539 fps | 98.2% |
| Rottweil R 903 | <<locked>> | 88% | 36,579 psi | 90% | 2507 fps | 97% |
| Shooters World Precision | <<locked>> | 82% | 35,027 psi | 86% | 2434 fps | 97.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 35,404 psi | 87% | 2382 fps | 99.6% |
| Somchem S355 | <<locked>> | 86% | 35,447 psi | 87% | 2464 fps | 96.3% |
| Somchem S365 | <<locked>> | 96% | 34,824 psi | 86% | 2543 fps | 97.5% |
| Vihtavuori N135 | <<locked>> | 82% | 34,751 psi | 86% | 2434 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 36,143 psi | 89% | 2441 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 92% | 36,289 psi | 89% | 2464 fps | 98% |
| Vihtavuori N540 | <<locked>> | 82% | 35,795 psi | 88% | 2457 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% | 31,154 psi | 77% | 2379 fps | 98.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 30,589 psi | 75% | 2359 fps | 95% |
| Bofors RP3 | <<locked>> | 82% | 31,778 psi | 78% | 2405 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 33,750 psi | 83% | 2448 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 32,474 psi | 80% | 2444 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,643 psi | 63% | 1486 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 32,605 psi | 80% | 2382 fps | 95.2% |
| IMR 3031 | <<locked>> | 80% | 33,272 psi | 82% | 2444 fps | 99.8% |
| IMR 4895 | <<locked>> | 80% | 33,939 psi | 84% | 2451 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 32,793 psi | 81% | 2382 fps | 96.4% |
| ReloadSwiss RS 14 | 12.1 gr | 80% | 25,730 psi | 63% | 1519 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 28,384 psi | 70% | 2362 fps | 95.2% |
| Rottweil R 903 | <<locked>> | 84% | 31,937 psi | 79% | 2402 fps | 95.4% |
| Shooters World Precision | <<locked>> | 80% | 32,793 psi | 81% | 2382 fps | 96.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 31,125 psi | 77% | 2287 fps | 98.9% |
| Somchem S355 | <<locked>> | 84% | 33,170 psi | 82% | 2411 fps | 95.5% |
| Somchem S365 | 40.3 gr | 92% | 30,589 psi | 75% | 2431 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 32,358 psi | 80% | 2385 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 34,040 psi | 84% | 2395 fps | 99.1% |
| Vihtavuori N150 | 34.9 gr | 84% | 28,123 psi | 69% | 2270 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 33,518 psi | 83% | 2408 fps | 98.7% |
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 46 powders for 7 x 72 R loaded with the .284 | 140gr | Peregrine VRG-3. ReloadSwiss RS 52 delivers the highest muzzle velocity at 2,556 fps; across all powders the maximum-charge window runs from 1,663 fps to 2,556 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 46 of the 46 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 77–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:12.0 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 | 140gr | Peregrine VRG-3 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.