Load Specifications
Load data in caliber 7 x 72 R with .284 | 140gr | Barnes MRX BT bullet and 25 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Somchem S365 and Vihtavuori N150.
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 2495 | <<locked>> | 84% | 35,331 psi | 87% | 2454 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 35,505 psi | 87% | 2484 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 35,331 psi | 87% | 2474 fps | 96.7% |
| Bofors RP3 | <<locked>> | 86% | 34,737 psi | 86% | 2474 fps | 96.6% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 36,608 psi | 90% | 2513 fps | 96.3% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 36,506 psi | 90% | 2530 fps | 97.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,185 psi | 84% | 1654 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 35,998 psi | 89% | 2484 fps | 98.7% |
| Lovex S062 | <<locked>> | 84% | 35,549 psi | 88% | 2444 fps | 97.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,432 psi | 85% | 1693 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 35,288 psi | 87% | 2556 fps | 98.3% |
| Rottweil R 902 | <<locked>> | 82% | 35,070 psi | 86% | 2411 fps | 97% |
| Rottweil R 903 | <<locked>> | 88% | 34,621 psi | 85% | 2464 fps | 96.3% |
| Shooters World Match Rifle | <<locked>> | 82% | 35,998 psi | 89% | 2484 fps | 98.7% |
| Shooters World Precision | <<locked>> | 84% | 35,549 psi | 88% | 2444 fps | 97.2% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 36,666 psi | 90% | 2477 fps | 95.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 36,158 psi | 89% | 2395 fps | 99.7% |
| Somchem S355 | <<locked>> | 88% | 35,969 psi | 89% | 2477 fps | 96.4% |
| Somchem S365 | <<locked>> | 98% | 35,302 psi | 87% | 2552 fps | 97.5% |
| Vihtavuori N135 | <<locked>> | 84% | 36,318 psi | 89% | 2461 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 35,056 psi | 86% | 2418 fps | 99.2% |
| Vihtavuori N150 | <<locked>> | 88% | 34,287 psi | 84% | 2418 fps | 97.3% |
| Vihtavuori N540 | <<locked>> | 84% | 36,129 psi | 89% | 2454 fps | 99.1% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 35,592 psi | 88% | 2444 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 82% | 35,752 psi | 88% | 2477 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 2495 | <<locked>> | 80% | 30,792 psi | 76% | 2356 fps | 99.8% |
| Accurate 4064 | <<locked>> | 80% | 29,153 psi | 72% | 2333 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 30,937 psi | 76% | 2369 fps | 95.1% |
| Bofors RP3 | <<locked>> | 84% | 32,329 psi | 80% | 2421 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 34,214 psi | 84% | 2457 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 31,937 psi | 79% | 2421 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,324 psi | 62% | 1476 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 33,518 psi | 83% | 2431 fps | 98.2% |
| Lovex S062 | <<locked>> | 80% | 31,241 psi | 77% | 2343 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,367 psi | 62% | 1509 fps | 100% |
| ReloadSwiss RS 60 | 37.3 gr | 82% | 28,993 psi | 71% | 2379 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 80% | 33,025 psi | 81% | 2365 fps | 96.3% |
| Rottweil R 903 | <<locked>> | 86% | 32,532 psi | 80% | 2415 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,518 psi | 83% | 2431 fps | 98.2% |
| Shooters World Precision | <<locked>> | 80% | 31,241 psi | 77% | 2343 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 34,287 psi | 84% | 2425 fps | 95.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,965 psi | 74% | 2260 fps | 98.6% |
| Somchem S355 | <<locked>> | 86% | 33,591 psi | 83% | 2425 fps | 95.6% |
| Somchem S365 | 40.5 gr | 94% | 31,082 psi | 77% | 2444 fps | 95.8% |
| Vihtavuori N135 | <<locked>> | 80% | 31,908 psi | 79% | 2369 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 32,953 psi | 81% | 2372 fps | 98.8% |
| Vihtavuori N150 | 36 gr | 84% | 30,008 psi | 74% | 2320 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 31,546 psi | 78% | 2352 fps | 98% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 33,402 psi | 82% | 2395 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 33,156 psi | 82% | 2418 fps | 95.5% |
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 48 powders for 7 x 72 R loaded with the .284 | 140gr | Barnes MRX BT. ReloadSwiss RS 62 delivers the highest muzzle velocity at 2,569 fps; across all powders the maximum-charge window runs from 1,654 fps to 2,569 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 48 of the 48 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 74–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:11.5 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. ReloadSwiss RS 60, Somchem S365, Vihtavuori N150 rank at the top here: for 7 x 72 R with the .284 | 140gr | Barnes MRX BT 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.