Load Specifications
Load data in caliber 7 x 72 R with .284 | 150gr | Peregrine VLR-4 bullet and 33 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Bofors RP3 and Rottweil R 903.
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% | 36,085 psi | 89% | 2356 fps | 100% |
| Accurate 4064 | <<locked>> | 88% | 36,434 psi | 90% | 2388 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 36,376 psi | 90% | 2382 fps | 97.2% |
| Alliant Reloder-17 | <<locked>> | 92% | 36,187 psi | 89% | 2444 fps | 96.2% |
| Bofors RP3 | <<locked>> | 88% | 35,389 psi | 87% | 2379 fps | 97% |
| Hodgdon BL-C2 | <<locked>> | 82% | 36,535 psi | 90% | 2392 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 34,969 psi | 86% | 2362 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 35,041 psi | 86% | 2382 fps | 96.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,982 psi | 84% | 1552 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 35,824 psi | 88% | 2333 fps | 96.4% |
| IMR 3031 | <<locked>> | 82% | 35,563 psi | 88% | 2382 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 35,578 psi | 88% | 2372 fps | 96% |
| Lovex D073.6 | <<locked>> | 82% | 34,606 psi | 85% | 2343 fps | 98.6% |
| Lovex S062 | <<locked>> | 86% | 36,390 psi | 90% | 2349 fps | 97.6% |
| Norma 201 | <<locked>> | 82% | 35,853 psi | 88% | 2323 fps | 97.4% |
| Norma 202 | <<locked>> | 82% | 35,998 psi | 89% | 2343 fps | 99.3% |
| Norma 203B | <<locked>> | 86% | 36,434 psi | 90% | 2382 fps | 96.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,301 psi | 84% | 1591 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 36,332 psi | 89% | 2461 fps | 98.7% |
| Rottweil R 902 | <<locked>> | 84% | 36,230 psi | 89% | 2323 fps | 97.4% |
| Rottweil R 903 | <<locked>> | 90% | 35,592 psi | 88% | 2372 fps | 96.8% |
| Shooters World Match Rifle | <<locked>> | 82% | 34,606 psi | 85% | 2343 fps | 98.6% |
| Shooters World Precision | <<locked>> | 86% | 36,390 psi | 90% | 2349 fps | 97.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 34,925 psi | 86% | 2260 fps | 99.6% |
| Somchem S341 | <<locked>> | 82% | 36,042 psi | 89% | 2339 fps | 95.8% |
| Somchem S355 | <<locked>> | 88% | 34,563 psi | 85% | 2336 fps | 96.1% |
| Somchem S365ᴾ | <<locked>> | 100% | 36,187 psi | 89% | 2454 fps | 97.9% |
| Vihtavuori N135 | <<locked>> | 84% | 35,027 psi | 86% | 2323 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 36,158 psi | 89% | 2326 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 90% | 35,302 psi | 87% | 2329 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 84% | 34,722 psi | 86% | 2313 fps | 98.9% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 36,448 psi | 90% | 2349 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 82% | 34,142 psi | 84% | 2329 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% | 29,457 psi | 73% | 2221 fps | 99.7% |
| Accurate 4064 | <<locked>> | 80% | 27,905 psi | 69% | 2198 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 31,792 psi | 78% | 2283 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 90% | 33,953 psi | 84% | 2392 fps | 95.3% |
| Bofors RP3 | 33.5 gr | 84% | 30,821 psi | 76% | 2277 fps | 95.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 33,895 psi | 83% | 2333 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 33,054 psi | 81% | 2316 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 30,792 psi | 76% | 2280 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,990 psi | 62% | 1385 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 33,533 psi | 83% | 2283 fps | 95.7% |
| IMR 3031 | <<locked>> | 80% | 33,112 psi | 82% | 2333 fps | 99.8% |
| IMR 4895 | <<locked>> | 82% | 33,257 psi | 82% | 2323 fps | 95.1% |
| Lovex D073.6 | <<locked>> | 80% | 32,314 psi | 80% | 2293 fps | 98% |
| Lovex S062 | <<locked>> | 80% | 30,052 psi | 74% | 2208 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 33,547 psi | 83% | 2274 fps | 96.7% |
| Norma 202 | <<locked>> | 80% | 33,649 psi | 83% | 2293 fps | 98.8% |
| Norma 203B | <<locked>> | 84% | 34,127 psi | 84% | 2333 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,382 psi | 63% | 1424 fps | 100% |
| ReloadSwiss RS 60 | 34 gr | 82% | 27,963 psi | 69% | 2241 fps | 95% |
| Rottweil R 902 | <<locked>> | 80% | 32,010 psi | 79% | 2231 fps | 96.1% |
| Rottweil R 903 | 33.6 gr | 86% | 31,009 psi | 76% | 2274 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 32,314 psi | 80% | 2293 fps | 98% |
| Shooters World Precision | <<locked>> | 80% | 30,052 psi | 74% | 2208 fps | 95.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 28,950 psi | 71% | 2129 fps | 98.4% |
| Somchem S341 | <<locked>> | 80% | 33,808 psi | 83% | 2293 fps | 95% |
| Somchem S355 | <<locked>> | 86% | 32,314 psi | 80% | 2283 fps | 95.3% |
| Somchem S365 | <<locked>> | 94% | 29,776 psi | 73% | 2300 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 30,632 psi | 75% | 2231 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 80% | 31,604 psi | 78% | 2231 fps | 98.6% |
| Vihtavuori N150 | <<locked>> | 84% | 28,819 psi | 71% | 2182 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 30,458 psi | 75% | 2221 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 34,258 psi | 84% | 2303 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 32,010 psi | 79% | 2280 fps | 95.2% |
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 57 powders for 7 x 72 R loaded with the .284 | 150gr | Peregrine VLR-4. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,461 fps; across all powders the maximum-charge window runs from 1,552 fps to 2,461 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 57 of the 57 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (280 MPa), the top charges use 70–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.284" calls for a 1:9.0 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, Bofors RP3, Rottweil R 903 rank at the top here: for 7 x 72 R with the .284 | 150gr | Peregrine VLR-4 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.