Load Specifications
Load data in caliber 7 mm B.R. Rem. with .284 | 105gr | IBEX Viper bullet and 31 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2207, Norma 200 and Alliant Reloder-7.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 90% | 50,792 psi | 86% | 2723 fps | 99.4% |
| Accurate 2015ᴾ | <<locked>> | 100% | 42,960 psi | 73% | 2680 fps | 97.5% |
| Accurate LT-30 | <<locked>> | 96% | 50,662 psi | 86% | 2707 fps | 97.4% |
| ADI AR 2205 | <<locked>> | 82% | 50,183 psi | 85% | 2605 fps | 100% |
| ADI AR 2207 | <<locked>> | 96% | 52,272 psi | 89% | 2822 fps | 100% |
| ADI AR 2219 | <<locked>> | 98% | 50,850 psi | 87% | 2844 fps | 97.3% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 39,711 psi | 68% | 2697 fps | 98.9% |
| Alliant Reloder-10xᴾ | <<locked>> | 100% | 49,298 psi | 84% | 2812 fps | 99.4% |
| Alliant Reloder-7 | <<locked>> | 94% | 52,069 psi | 89% | 2785 fps | 99.8% |
| Baschieri & Pellagri 106 | <<locked>> | 98% | 51,866 psi | 88% | 2749 fps | 97.9% |
| Hodgdon H322ᴾ | <<locked>> | 100% | 48,907 psi | 83% | 2812 fps | 96.9% |
| Hodgdon H335ᴾ | <<locked>> | 100% | 49,980 psi | 85% | 2831 fps | 96% |
| Hodgdon H4198 | <<locked>> | 94% | 52,562 psi | 89% | 2753 fps | 97.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,473 psi | 54% | 1670 fps | 100% |
| IMR 4198ᴾ | <<locked>> | 100% | 51,285 psi | 87% | 2792 fps | 99.9% |
| IMR 4227 | <<locked>> | 88% | 50,111 psi | 85% | 2703 fps | 100% |
| Lovex D060 | <<locked>> | 82% | 50,198 psi | 85% | 2736 fps | 99.7% |
| Lovex D063 | <<locked>> | 82% | 50,836 psi | 87% | 2710 fps | 99.9% |
| Lovex S053 | <<locked>> | 90% | 51,808 psi | 88% | 2707 fps | 100% |
| Norma 200 | <<locked>> | 96% | 50,430 psi | 86% | 2808 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,299 psi | 53% | 1709 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 90% | 52,373 psi | 89% | 2779 fps | 100% |
| Shooters World Buffalo Rifle | <<locked>> | 82% | 50,198 psi | 85% | 2736 fps | 99.7% |
| Shooters World SOCOM | <<locked>> | 82% | 50,836 psi | 87% | 2710 fps | 99.9% |
| SNPE Vectan BA6 1/2 | <<locked>> | 94% | 52,562 psi | 89% | 2566 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 98% | 50,720 psi | 86% | 2841 fps | 96.2% |
| SNPE Vectan SP 3ᴾ | <<locked>> | 100% | 50,328 psi | 86% | 2808 fps | 98.1% |
| Vihtavuori N110 | <<locked>> | 84% | 51,372 psi | 87% | 2618 fps | 100% |
| Vihtavuori N120 | <<locked>> | 96% | 52,272 psi | 89% | 2772 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 47,761 psi | 81% | 2717 fps | 99% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 41,539 psi | 71% | 2612 fps | 96.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 37,202 psi | 63% | 2477 fps | 97.1% |
| Accurate 2015 | <<locked>> | 92% | 34,171 psi | 58% | 2500 fps | 95% |
| Accurate LT-30 | <<locked>> | 88% | 40,538 psi | 69% | 2530 fps | 95.1% |
| ADI AR 2205 | <<locked>> | 80% | 47,747 psi | 81% | 2569 fps | 100% |
| ADI AR 2207 | 22.7 gr | 80% | 33,112 psi | 56% | 2474 fps | 99.3% |
| ADI AR 2219 | <<locked>> | 92% | 42,192 psi | 72% | 2687 fps | 95.2% |
| Alliant AR-Comp | <<locked>> | 88% | 28,413 psi | 48% | 2405 fps | 95% |
| Alliant Reloder-10x | <<locked>> | 84% | 31,140 psi | 53% | 2444 fps | 95.4% |
| Alliant Reloder-7 | 23.5 gr | 80% | 34,954 psi | 60% | 2464 fps | 97.1% |
| Baschieri & Pellagri 106 | <<locked>> | 90% | 40,379 psi | 69% | 2552 fps | 95.5% |
| Hodgdon H322 | <<locked>> | 96% | 43,381 psi | 74% | 2713 fps | 95.6% |
| Hodgdon H335 | <<locked>> | 98% | 46,717 psi | 80% | 2776 fps | 95.2% |
| Hodgdon H4198 | <<locked>> | 88% | 44,483 psi | 76% | 2618 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,540 psi | 40% | 1496 fps | 100% |
| IMR 4198 | <<locked>> | 80% | 29,950 psi | 51% | 2349 fps | 95.7% |
| IMR 4227 | <<locked>> | 80% | 39,987 psi | 68% | 2530 fps | 99.5% |
| Lovex D060 | <<locked>> | 80% | 47,703 psi | 81% | 2697 fps | 99.5% |
| Lovex D063 | <<locked>> | 80% | 47,921 psi | 82% | 2664 fps | 99.8% |
| Lovex S053 | <<locked>> | 80% | 39,262 psi | 67% | 2500 fps | 100% |
| Norma 200 | 23.7 gr | 80% | 31,720 psi | 54% | 2438 fps | 96.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 23,192 psi | 39% | 1529 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 39,334 psi | 67% | 2556 fps | 99.3% |
| Shooters World Buffalo Rifle | <<locked>> | 80% | 47,703 psi | 81% | 2697 fps | 99.5% |
| Shooters World SOCOM | <<locked>> | 80% | 47,921 psi | 82% | 2664 fps | 99.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 36,985 psi | 63% | 2329 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 96% | 47,819 psi | 81% | 2792 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 37,753 psi | 64% | 2572 fps | 95.1% |
| Vihtavuori N110 | <<locked>> | 80% | 46,267 psi | 79% | 2546 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 33,214 psi | 57% | 2441 fps | 99.8% |
| Vihtavuori N130 | <<locked>> | 86% | 31,966 psi | 54% | 2402 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 96% | 37,043 psi | 63% | 2520 fps | 95.6% |
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 52 powders for 7 mm B.R. Rem. loaded with the .284 | 105gr | IBEX Viper. ADI AR 2219 delivers the highest muzzle velocity at 2,844 fps; across all powders the maximum-charge window runs from 1,670 fps to 2,844 fps. Accurate 2015 gives the best case fill at 100 %, and 52 of the 52 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (405 MPa), the top charges use 53–89 %, leaving at least 11 % headroom. The 105.0 gr projectile in 0.284" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 2015, Accurate 2460, Accurate 2495 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. ADI AR 2207, Norma 200, Alliant Reloder-7 rank at the top here: for 7 mm B.R. Rem. with the .284 | 105gr | IBEX Viper they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2495, Accurate 2520, Alliant Power Pro 1200-R 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.