Load Specifications
Load data in caliber 7 x 72 R with .284 | 140gr | Frontier BTSP 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, 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 2495 | <<locked>> | 86% | 36,535 psi | 90% | 2448 fps | 100% |
| Accurate 4064 | <<locked>> | 88% | 36,695 psi | 90% | 2477 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 36,274 psi | 89% | 2461 fps | 96.5% |
| Bofors RP3 | <<locked>> | 88% | 35,360 psi | 87% | 2457 fps | 96.3% |
| Hodgdon BL-C2 | <<locked>> | 82% | 36,419 psi | 90% | 2470 fps | 97.5% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 35,215 psi | 87% | 2467 fps | 96.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,243 psi | 84% | 1621 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 35,360 psi | 87% | 2464 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 82% | 34,447 psi | 85% | 2421 fps | 98% |
| Lovex S062 | <<locked>> | 86% | 36,521 psi | 90% | 2431 fps | 97% |
| Norma 201 | <<locked>> | 82% | 35,926 psi | 88% | 2405 fps | 96.7% |
| Norma 202 | <<locked>> | 82% | 35,868 psi | 88% | 2421 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,214 psi | 84% | 1657 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 36,332 psi | 89% | 2539 fps | 98% |
| Rottweil R 902 | <<locked>> | 84% | 36,260 psi | 89% | 2405 fps | 96.8% |
| Rottweil R 903 | <<locked>> | 90% | 35,549 psi | 88% | 2454 fps | 96% |
| Shooters World Match Rifle | <<locked>> | 82% | 34,447 psi | 85% | 2421 fps | 98% |
| Shooters World Precision | <<locked>> | 86% | 36,521 psi | 90% | 2431 fps | 97% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 35,070 psi | 86% | 2343 fps | 99.3% |
| Somchem S365ᴾ | <<locked>> | 100% | 35,984 psi | 89% | 2530 fps | 97.1% |
| Vihtavuori N135 | <<locked>> | 84% | 34,911 psi | 86% | 2405 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 36,158 psi | 89% | 2408 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 90% | 35,157 psi | 87% | 2405 fps | 97.1% |
| Vihtavuori N540 | <<locked>> | 84% | 34,751 psi | 86% | 2395 fps | 98.5% |
| Winchester StaBALL Match | <<locked>> | 84% | 36,593 psi | 90% | 2461 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 2495 | <<locked>> | 80% | 29,950 psi | 74% | 2306 fps | 99.5% |
| Accurate 4064 | <<locked>> | 80% | 28,340 psi | 70% | 2283 fps | 97.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 33,997 psi | 84% | 2411 fps | 95.7% |
| Bofors RP3 | <<locked>> | 86% | 33,098 psi | 82% | 2405 fps | 95.5% |
| Hodgdon BL-C2 | <<locked>> | 80% | 33,910 psi | 84% | 2415 fps | 96.7% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 32,866 psi | 81% | 2408 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,193 psi | 62% | 1444 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 33,083 psi | 81% | 2415 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 80% | 32,271 psi | 79% | 2369 fps | 97.4% |
| Lovex S062 | <<locked>> | 82% | 32,184 psi | 79% | 2336 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 33,765 psi | 83% | 2356 fps | 96% |
| Norma 202 | <<locked>> | 80% | 33,634 psi | 83% | 2372 fps | 98.4% |
| ReloadSwiss RS 14 | 11.1 gr | 80% | 25,295 psi | 62% | 1480 fps | 100% |
| ReloadSwiss RS 60 | 35.7 gr | 84% | 29,849 psi | 74% | 2365 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 32,256 psi | 79% | 2313 fps | 95.4% |
| Rottweil R 903 | <<locked>> | 88% | 33,330 psi | 82% | 2405 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,271 psi | 79% | 2369 fps | 97.4% |
| Shooters World Precision | <<locked>> | 82% | 32,184 psi | 79% | 2336 fps | 95.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,037 psi | 72% | 2208 fps | 97.9% |
| Somchem S365 | <<locked>> | 96% | 31,836 psi | 78% | 2425 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 30,748 psi | 76% | 2316 fps | 99.6% |
| Vihtavuori N140 | <<locked>> | 80% | 31,792 psi | 78% | 2313 fps | 98.2% |
| Vihtavuori N150 | 34.5 gr | 86% | 30,951 psi | 76% | 2310 fps | 95.6% |
| Vihtavuori N540 | <<locked>> | 80% | 30,414 psi | 75% | 2297 fps | 97.2% |
| Winchester StaBALL Match | <<locked>> | 82% | 34,142 psi | 84% | 2408 fps | 95.3% |
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 54 powders for 7 x 72 R loaded with the .284 | 140gr | Frontier BTSP. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,539 fps; across all powders the maximum-charge window runs from 1,621 fps to 2,539 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 54 of the 54 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 84–90 %, leaving at least 10 % headroom. The 140.0 gr projectile in 0.284" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14, Somchem S365 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, Vihtavuori N150, ReloadSwiss RS 14 rank at the top here: for 7 x 72 R with the .284 | 140gr | Frontier BTSP 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.