Load Specifications
Load data in caliber .280 Rem. with .284 | 158gr | Prvi Partizan Grom bullet and 83 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-16, ReloadSwiss RS 70 and Alliant Reloder-26.
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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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 50,198 psi | 85% | 2579 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 51,837 psi | 88% | 2631 fps | 97.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 48,051 psi | 82% | 2664 fps | 98.6% |
| Accurate 4064 | <<locked>> | 84% | 50,575 psi | 86% | 2631 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 50,430 psi | 86% | 2717 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 86% | 51,184 psi | 87% | 2654 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 98% | 51,866 psi | 88% | 2753 fps | 97% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 53,142 psi | 90% | 2818 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 51,488 psi | 88% | 2677 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 51,851 psi | 88% | 2697 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 51,372 psi | 87% | 2769 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 52,373 psi | 89% | 2799 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 51,010 psi | 87% | 2740 fps | 96.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 47,659 psi | 81% | 2730 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,208 psi | 77% | 2684 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,639 psi | 67% | 2595 fps | 97.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 51,329 psi | 87% | 2864 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 52,982 psi | 90% | 2717 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 52,069 psi | 89% | 2694 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 47,659 psi | 81% | 2730 fps | 96.4% |
| Bofors RP7 | <<locked>> | 90% | 52,011 psi | 89% | 2674 fps | 98% |
| Hodgdon H380 | <<locked>> | 86% | 52,663 psi | 90% | 2707 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 92% | 52,823 psi | 90% | 2766 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 90% | 53,069 psi | 90% | 2726 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 51,619 psi | 88% | 2703 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 50,241 psi | 86% | 2690 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 52,649 psi | 90% | 2795 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,027 psi | 61% | 1670 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 51,735 psi | 88% | 2664 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 50,865 psi | 87% | 2641 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 50,328 psi | 86% | 2618 fps | 98.2% |
| IMR 4350 | <<locked>> | 94% | 52,504 psi | 89% | 2703 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 50,415 psi | 86% | 2648 fps | 98.1% |
| IMR 4831 | <<locked>> | 94% | 50,908 psi | 87% | 2710 fps | 99.8% |
| IMR 4895 | <<locked>> | 82% | 49,893 psi | 85% | 2674 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 52,620 psi | 90% | 2628 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 50,923 psi | 87% | 2638 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 50,227 psi | 86% | 2648 fps | 99.1% |
| Lovex S070 | <<locked>> | 92% | 51,126 psi | 87% | 2680 fps | 98.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 39,842 psi | 68% | 2516 fps | 96.9% |
| Norma 201 | <<locked>> | 82% | 52,112 psi | 89% | 2644 fps | 100% |
| Norma 202 | <<locked>> | 82% | 52,823 psi | 90% | 2648 fps | 100% |
| Norma 203B | <<locked>> | 84% | 51,155 psi | 87% | 2684 fps | 100% |
| Norma 204 | <<locked>> | 94% | 52,765 psi | 90% | 2746 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 50,459 psi | 86% | 2812 fps | 98.3% |
| Norma URP | <<locked>> | 94% | 52,808 psi | 90% | 2753 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 51,532 psi | 88% | 2710 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 51,416 psi | 88% | 2749 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,753 psi | 63% | 1713 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 52,823 psi | 90% | 2690 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 52,460 psi | 89% | 2759 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 51,866 psi | 88% | 2792 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 50,111 psi | 85% | 2736 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 52,460 psi | 89% | 2815 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 52,939 psi | 90% | 2651 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 52,257 psi | 89% | 2690 fps | 100% |
| Rottweil R 905 | <<locked>> | 98% | 50,024 psi | 85% | 2726 fps | 96.9% |
| Rottweil R 907 | <<locked>> | 90% | 52,011 psi | 89% | 2674 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 90% | 50,227 psi | 86% | 2648 fps | 99.1% |
| Shooters World Precision | <<locked>> | 84% | 50,923 psi | 87% | 2638 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 51,126 psi | 87% | 2680 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 50,169 psi | 85% | 2694 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 51,880 psi | 88% | 2674 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 50,517 psi | 86% | 2543 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 49,980 psi | 85% | 2602 fps | 98.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 52,707 psi | 90% | 2769 fps | 97.4% |
| Somchem S335 | <<locked>> | 82% | 52,794 psi | 90% | 2582 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 52,228 psi | 89% | 2684 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 51,488 psi | 88% | 2759 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 50,488 psi | 86% | 2703 fps | 97.8% |
| Vihtavuori N135 | <<locked>> | 84% | 52,881 psi | 90% | 2612 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 49,966 psi | 85% | 2582 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 50,357 psi | 86% | 2618 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 51,735 psi | 88% | 2700 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 46,673 psi | 79% | 2625 fps | 96.5% |
| Vihtavuori N540 | <<locked>> | 84% | 51,474 psi | 88% | 2625 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 50,850 psi | 87% | 2707 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 50,357 psi | 86% | 2756 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 51,256 psi | 87% | 2674 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 52,823 psi | 90% | 2766 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,422 psi | 69% | 2717 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 51,851 psi | 88% | 2680 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 50,618 psi | 86% | 2694 fps | 96.7% |
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 2495 | <<locked>> | 80% | 47,239 psi | 80% | 2536 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,455 psi | 77% | 2526 fps | 96.4% |
| Accurate 3100 | <<locked>> | 92% | 36,535 psi | 62% | 2448 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 44,701 psi | 76% | 2539 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,344 psi | 57% | 2388 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 80% | 42,511 psi | 72% | 2507 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 94% | 45,527 psi | 78% | 2641 fps | 95.4% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,340 psi | 79% | 2703 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,743 psi | 73% | 2533 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,672 psi | 78% | 2595 fps | 99.6% |
| Alliant Reloder-16 | 42.6 gr | 80% | 33,243 psi | 57% | 2402 fps | 96.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,275 psi | 63% | 2526 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 94% | 44,904 psi | 76% | 2631 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 98% | 44,686 psi | 76% | 2674 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 84% | 27,325 psi | 47% | 2267 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 96% | 34,998 psi | 60% | 2484 fps | 95.6% |
| Alliant Reloder-26 | 51.7 gr | 88% | 33,373 psi | 57% | 2490 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,516 psi | 84% | 2661 fps | 99.8% |
| Bofors RP3 | <<locked>> | 80% | 42,743 psi | 73% | 2539 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 44,686 psi | 76% | 2674 fps | 95.5% |
| Bofors RP7 | <<locked>> | 82% | 40,582 psi | 69% | 2467 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 43,381 psi | 74% | 2549 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 82% | 37,985 psi | 65% | 2490 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 84% | 43,903 psi | 75% | 2566 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,661 psi | 52% | 2306 fps | 97.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,094 psi | 80% | 2644 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 39,726 psi | 68% | 2556 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,861 psi | 46% | 1490 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,544 psi | 83% | 2615 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,701 psi | 76% | 2539 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,268 psi | 80% | 2569 fps | 97.6% |
| IMR 4350 | <<locked>> | 86% | 40,814 psi | 69% | 2493 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,494 psi | 67% | 2444 fps | 95.5% |
| IMR 4831 | <<locked>> | 80% | 32,256 psi | 55% | 2349 fps | 96.3% |
| IMR 4895 | <<locked>> | 80% | 46,833 psi | 80% | 2621 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 49,385 psi | 84% | 2579 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 44,831 psi | 76% | 2539 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,086 psi | 63% | 2398 fps | 96.3% |
| Lovex S070 | <<locked>> | 82% | 37,434 psi | 64% | 2425 fps | 95.2% |
| Lovex S071 | <<locked>> | 96% | 34,969 psi | 60% | 2415 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 49,168 psi | 84% | 2602 fps | 100% |
| Norma 202 | <<locked>> | 80% | 49,559 psi | 84% | 2598 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,049 psi | 77% | 2582 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 46,253 psi | 79% | 2635 fps | 95.5% |
| Norma MRP | <<locked>> | 92% | 38,624 psi | 66% | 2579 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 33,431 psi | 57% | 2388 fps | 96.5% |
| Ramshot Big Game | <<locked>> | 80% | 45,092 psi | 77% | 2602 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 82% | 34,824 psi | 59% | 2428 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,325 psi | 47% | 1526 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,497 psi | 74% | 2533 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,805 psi | 83% | 2703 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,653 psi | 68% | 2582 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 32,982 psi | 56% | 2405 fps | 96.1% |
| ReloadSwiss RS 70 | 46.6 gr | 80% | 32,692 psi | 56% | 2408 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 46,905 psi | 80% | 2556 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,147 psi | 68% | 2487 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 94% | 43,743 psi | 74% | 2615 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 82% | 40,582 psi | 69% | 2467 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,086 psi | 63% | 2398 fps | 96.3% |
| Shooters World Precision | <<locked>> | 80% | 44,831 psi | 76% | 2539 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 37,434 psi | 64% | 2425 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,104 psi | 70% | 2536 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,443 psi | 82% | 2618 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,989 psi | 71% | 2415 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 38,566 psi | 66% | 2395 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 43,323 psi | 74% | 2608 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 49,879 psi | 85% | 2543 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 40,886 psi | 70% | 2493 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 30,153 psi | 51% | 2349 fps | 98.6% |
| Somchem S385 | <<locked>> | 92% | 41,553 psi | 71% | 2546 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 80% | 46,572 psi | 79% | 2523 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,891 psi | 80% | 2536 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,769 psi | 66% | 2425 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 34,824 psi | 59% | 2388 fps | 96.9% |
| Vihtavuori N165 | <<locked>> | 98% | 43,700 psi | 74% | 2572 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 45,397 psi | 77% | 2533 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 34,432 psi | 59% | 2395 fps | 96.5% |
| Vihtavuori N555 | <<locked>> | 84% | 29,704 psi | 51% | 2343 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,200 psi | 58% | 2365 fps | 98.7% |
| Winchester 760 | <<locked>> | 82% | 37,985 psi | 65% | 2490 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 86% | 25,672 psi | 44% | 2287 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 48,356 psi | 82% | 2628 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 44,208 psi | 75% | 2585 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 99 powders for .280 Rem. loaded with the .284 | 158gr | Prvi Partizan Grom. Alliant Reloder-26 delivers the highest muzzle velocity at 2,864 fps; across all powders the maximum-charge window runs from 1,670 fps to 2,864 fps. Accurate 3100 gives the best case fill at 100 %, and 99 of the 99 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (405 MPa), the top charges use 61–90 %, leaving at least 10 % headroom. The 158.0 gr projectile in 0.284" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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. Alliant Reloder-16, ReloadSwiss RS 70, Alliant Reloder-26 rank at the top here: for .280 Rem. with the .284 | 158gr | Prvi Partizan Grom they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Hodgdon H1000 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.