Load Specifications
Load data in caliber 7 x 72 R with .284 | 140gr | Sierra GameKing bullet and 24 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>> | 84% | 35,563 psi | 88% | 2438 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 35,679 psi | 88% | 2464 fps | 99.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 35,157 psi | 87% | 2451 fps | 96.4% |
| Bofors RP3 | <<locked>> | 86% | 34,519 psi | 85% | 2451 fps | 96.3% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 36,274 psi | 89% | 2480 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 36,172 psi | 89% | 2503 fps | 96.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,229 psi | 84% | 1634 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 36,709 psi | 90% | 2448 fps | 96.3% |
| Lovex D073.6 | <<locked>> | 82% | 35,926 psi | 88% | 2464 fps | 98.5% |
| Lovex S062 | <<locked>> | 84% | 35,491 psi | 87% | 2425 fps | 96.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,548 psi | 85% | 1677 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 35,186 psi | 87% | 2530 fps | 97.9% |
| Rottweil R 902 | <<locked>> | 82% | 35,288 psi | 87% | 2395 fps | 96.7% |
| Rottweil R 903 | <<locked>> | 88% | 34,708 psi | 85% | 2448 fps | 96% |
| Shooters World Match Rifle | <<locked>> | 82% | 35,926 psi | 88% | 2464 fps | 98.5% |
| Shooters World Precision | <<locked>> | 84% | 35,491 psi | 87% | 2425 fps | 96.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 36,201 psi | 89% | 2379 fps | 99.6% |
| Somchem S355 | <<locked>> | 88% | 35,969 psi | 89% | 2457 fps | 96.1% |
| Somchem S365 | <<locked>> | 98% | 35,070 psi | 86% | 2523 fps | 97.1% |
| Vihtavuori N135 | <<locked>> | 84% | 36,289 psi | 89% | 2441 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 35,099 psi | 86% | 2398 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 90% | 36,448 psi | 90% | 2444 fps | 97.7% |
| Vihtavuori N540 | <<locked>> | 84% | 35,781 psi | 88% | 2431 fps | 98.9% |
| Winchester StaBALL Match | <<locked>> | 82% | 35,418 psi | 87% | 2448 fps | 96% |
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% | 31,256 psi | 77% | 2346 fps | 99.8% |
| Accurate 4064 | <<locked>> | 80% | 29,588 psi | 73% | 2323 fps | 97.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 33,054 psi | 81% | 2402 fps | 95.6% |
| Bofors RP3 | <<locked>> | 84% | 32,430 psi | 80% | 2402 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 34,156 psi | 84% | 2434 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 31,879 psi | 79% | 2398 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,440 psi | 63% | 1460 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 34,534 psi | 85% | 2398 fps | 95.5% |
| Lovex D073.6 | <<locked>> | 80% | 33,489 psi | 82% | 2408 fps | 97.9% |
| Lovex S062 | <<locked>> | 80% | 31,357 psi | 77% | 2326 fps | 95.4% |
| ReloadSwiss RS 14 | 11.5 gr | 80% | 25,541 psi | 63% | 1496 fps | 100% |
| ReloadSwiss RS 60 | 36.9 gr | 84% | 30,864 psi | 76% | 2411 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 33,185 psi | 82% | 2346 fps | 96% |
| Rottweil R 903 | <<locked>> | 86% | 32,343 psi | 80% | 2392 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 33,489 psi | 82% | 2408 fps | 97.9% |
| Shooters World Precision | <<locked>> | 80% | 31,357 psi | 77% | 2326 fps | 95.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 29,950 psi | 74% | 2241 fps | 98.4% |
| Somchem S355 | <<locked>> | 86% | 33,605 psi | 83% | 2405 fps | 95.3% |
| Somchem S365 | <<locked>> | 94% | 31,154 psi | 77% | 2421 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 31,879 psi | 79% | 2349 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 80% | 32,750 psi | 81% | 2346 fps | 98.6% |
| Vihtavuori N150 | 34.8 gr | 84% | 30,037 psi | 74% | 2300 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 31,459 psi | 77% | 2333 fps | 97.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 33,083 psi | 81% | 2395 fps | 95.1% |
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 | Sierra GameKing. ReloadSwiss RS 62 delivers the highest muzzle velocity at 2,536 fps; across all powders the maximum-charge window runs from 1,634 fps to 2,536 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 1:10.0 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. ReloadSwiss RS 60, Vihtavuori N150, ReloadSwiss RS 14 rank at the top here: for 7 x 72 R with the .284 | 140gr | Sierra GameKing 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.