Load Specifications
Load data in caliber .280 Rem. with .284 | 145gr | Speer Grand Slam bullet and 86 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Hodgdon H414.
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>> | 84% | 52,533 psi | 89% | 2736 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 50,850 psi | 87% | 2736 fps | 96.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,456 psi | 79% | 2753 fps | 97.8% |
| Accurate 4064 | <<locked>> | 86% | 52,692 psi | 90% | 2789 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 52,446 psi | 89% | 2874 fps | 99.7% |
| ADI AR 2206H | <<locked>> | 82% | 52,359 psi | 89% | 2812 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 50,198 psi | 85% | 2762 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 98% | 50,604 psi | 86% | 2848 fps | 95.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 51,793 psi | 88% | 2927 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 53,098 psi | 90% | 2825 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 50,314 psi | 86% | 2785 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 50,749 psi | 86% | 2805 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 94% | 50,256 psi | 86% | 2877 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 90% | 50,952 psi | 87% | 2904 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,881 psi | 90% | 2890 fps | 96.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,932 psi | 75% | 2779 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,566 psi | 66% | 2677 fps | 96.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,676 psi | 85% | 2956 fps | 99.5% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 51,851 psi | 88% | 2822 fps | 99.7% |
| Bofors RP3 | <<locked>> | 86% | 50,937 psi | 87% | 2802 fps | 100% |
| Bofors RP7 | <<locked>> | 90% | 50,923 psi | 87% | 2776 fps | 97.2% |
| Hodgdon H380 | <<locked>> | 86% | 51,488 psi | 88% | 2812 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 92% | 51,445 psi | 88% | 2864 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 90% | 51,996 psi | 89% | 2828 fps | 96.7% |
| Hodgdon H4895 | <<locked>> | 82% | 52,953 psi | 90% | 2822 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 50,299 psi | 86% | 2808 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 52,388 psi | 89% | 2854 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 51,605 psi | 88% | 2897 fps | 97.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,042 psi | 61% | 1762 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 50,575 psi | 86% | 2772 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 52,837 psi | 90% | 2799 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 52,489 psi | 89% | 2776 fps | 98% |
| IMR 4350 | <<locked>> | 94% | 51,329 psi | 87% | 2802 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 90% | 52,547 psi | 89% | 2805 fps | 97.9% |
| IMR 4831 | <<locked>> | 96% | 53,084 psi | 90% | 2864 fps | 99.8% |
| IMR 4895 | <<locked>> | 84% | 52,069 psi | 89% | 2835 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 52,214 psi | 89% | 2789 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 51,677 psi | 88% | 2740 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 52,866 psi | 90% | 2792 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 52,214 psi | 89% | 2799 fps | 98.9% |
| Lovex S070 | <<locked>> | 92% | 50,082 psi | 85% | 2785 fps | 97.8% |
| Norma 201 | <<locked>> | 82% | 51,053 psi | 87% | 2756 fps | 100% |
| Norma 202 | <<locked>> | 82% | 51,692 psi | 88% | 2759 fps | 100% |
| Norma 203B | <<locked>> | 84% | 50,053 psi | 85% | 2792 fps | 99.9% |
| Norma 204 | <<locked>> | 94% | 51,808 psi | 88% | 2848 fps | 96.1% |
| Norma MRPᴾ | <<locked>> | 100% | 49,197 psi | 84% | 2907 fps | 97.4% |
| Norma URP | <<locked>> | 94% | 51,488 psi | 88% | 2861 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 84% | 50,285 psi | 86% | 2812 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 94% | 50,430 psi | 86% | 2854 fps | 98.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,434 psi | 62% | 1801 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 51,634 psi | 88% | 2792 fps | 98.4% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 51,140 psi | 87% | 2867 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 50,604 psi | 86% | 2900 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 52,301 psi | 89% | 2897 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 51,271 psi | 87% | 2917 fps | 99.4% |
| Rottweil R 902 | <<locked>> | 84% | 51,808 psi | 88% | 2759 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 50,807 psi | 86% | 2792 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,924 psi | 88% | 2877 fps | 96.6% |
| Rottweil R 907 | <<locked>> | 90% | 50,923 psi | 87% | 2776 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 92% | 52,214 psi | 89% | 2799 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 52,214 psi | 89% | 2789 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 52,866 psi | 90% | 2792 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 50,082 psi | 85% | 2785 fps | 97.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 52,359 psi | 89% | 2854 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 50,749 psi | 86% | 2782 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 52,199 psi | 89% | 2697 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 52,939 psi | 90% | 2700 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 52,228 psi | 89% | 2753 fps | 97.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,445 psi | 88% | 2871 fps | 96.5% |
| Somchem S335 | <<locked>> | 82% | 51,779 psi | 88% | 2694 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 52,779 psi | 90% | 2799 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 51,227 psi | 87% | 2792 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 50,125 psi | 85% | 2867 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,852 psi | 90% | 2858 fps | 97.6% |
| Vihtavuori N133 | <<locked>> | 82% | 52,634 psi | 90% | 2680 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 51,750 psi | 88% | 2726 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 52,243 psi | 89% | 2740 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 52,475 psi | 89% | 2772 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 50,531 psi | 86% | 2805 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 84% | 50,314 psi | 86% | 2730 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 52,982 psi | 90% | 2861 fps | 99.6% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,878 psi | 83% | 2858 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 50,212 psi | 85% | 2779 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 51,735 psi | 88% | 2867 fps | 98% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,436 psi | 67% | 2805 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 82% | 50,531 psi | 86% | 2789 fps | 100% |
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% | 45,963 psi | 78% | 2641 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,541 psi | 76% | 2621 fps | 95.4% |
| Accurate 3100 | <<locked>> | 94% | 37,884 psi | 64% | 2585 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 43,482 psi | 74% | 2641 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,387 psi | 55% | 2474 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 49,023 psi | 83% | 2756 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 41,756 psi | 71% | 2608 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 96% | 47,572 psi | 81% | 2792 fps | 95.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,165 psi | 77% | 2805 fps | 99.3% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 49,661 psi | 85% | 2769 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,800 psi | 71% | 2631 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,657 psi | 76% | 2697 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,343 psi | 55% | 2484 fps | 95.4% |
| Alliant Reloder-17 | 48 gr | 80% | 36,347 psi | 62% | 2615 fps | 98.6% |
| Alliant Reloder-19 | <<locked>> | 96% | 46,775 psi | 80% | 2782 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 86% | 28,413 psi | 48% | 2398 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 98% | 36,303 psi | 62% | 2618 fps | 95.2% |
| Alliant Reloder-26 | <<locked>> | 90% | 34,882 psi | 59% | 2635 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,559 psi | 83% | 2766 fps | 99.4% |
| Bofors RP3 | <<locked>> | 80% | 41,669 psi | 71% | 2638 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 42,177 psi | 72% | 2612 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 42,279 psi | 72% | 2644 fps | 97.9% |
| Hodgdon H414 | 50.4 gr | 86% | 42,221 psi | 72% | 2694 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 86% | 45,803 psi | 78% | 2720 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 49,516 psi | 84% | 2766 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,805 psi | 51% | 2385 fps | 96.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,006 psi | 78% | 2746 fps | 99.9% |
| Hodgdon Superformance | <<locked>> | 88% | 44,817 psi | 76% | 2772 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,803 psi | 46% | 1572 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,543 psi | 81% | 2720 fps | 99.9% |
| IMR 4064 | <<locked>> | 80% | 43,903 psi | 75% | 2644 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,282 psi | 79% | 2667 fps | 96.7% |
| IMR 4350 | <<locked>> | 88% | 42,554 psi | 72% | 2641 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 82% | 41,118 psi | 70% | 2592 fps | 95.2% |
| IMR 4831 | <<locked>> | 80% | 31,415 psi | 53% | 2431 fps | 95% |
| IMR 4895 | <<locked>> | 80% | 45,745 psi | 78% | 2726 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 80% | 48,805 psi | 83% | 2736 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,660 psi | 83% | 2690 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 43,990 psi | 75% | 2644 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 36,114 psi | 61% | 2487 fps | 95.2% |
| Lovex S070 | <<locked>> | 86% | 41,510 psi | 71% | 2625 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 47,993 psi | 82% | 2707 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,588 psi | 83% | 2710 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,034 psi | 75% | 2684 fps | 99.4% |
| Norma 204 | <<locked>> | 92% | 48,312 psi | 82% | 2789 fps | 95.3% |
| Norma MRP | <<locked>> | 96% | 42,888 psi | 73% | 2782 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 32,576 psi | 55% | 2474 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 43,918 psi | 75% | 2703 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 38,537 psi | 66% | 2621 fps | 95.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,224 psi | 46% | 1611 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,641 psi | 73% | 2628 fps | 96.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,659 psi | 81% | 2808 fps | 99.5% |
| ReloadSwiss RS 60 | 48 gr | 80% | 38,638 psi | 66% | 2677 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 34,403 psi | 59% | 2546 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 36,419 psi | 62% | 2605 fps | 95.7% |
| Rottweil R 902 | <<locked>> | 80% | 45,803 psi | 78% | 2661 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 39,218 psi | 67% | 2585 fps | 99.1% |
| Rottweil R 905 | <<locked>> | 98% | 48,646 psi | 83% | 2822 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 84% | 42,177 psi | 72% | 2612 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 36,114 psi | 61% | 2487 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,805 psi | 83% | 2736 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,990 psi | 75% | 2644 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 41,510 psi | 71% | 2625 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,190 psi | 68% | 2631 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,543 psi | 81% | 2726 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,037 psi | 83% | 2648 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,133 psi | 70% | 2516 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 40,292 psi | 69% | 2536 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 48,240 psi | 82% | 2815 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 48,747 psi | 83% | 2648 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,429 psi | 84% | 2746 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 39,813 psi | 68% | 2585 fps | 99.1% |
| Somchem S365 | <<locked>> | 80% | 29,327 psi | 50% | 2428 fps | 97.6% |
| Somchem S385 | <<locked>> | 94% | 43,337 psi | 74% | 2690 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 49,487 psi | 84% | 2638 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,542 psi | 78% | 2631 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,963 psi | 78% | 2641 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,913 psi | 65% | 2520 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 33,939 psi | 58% | 2477 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 44,338 psi | 75% | 2635 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,460 psi | 57% | 2477 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 86% | 30,806 psi | 52% | 2474 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,533 psi | 57% | 2451 fps | 97.9% |
| Winchester 760 | <<locked>> | 86% | 42,453 psi | 72% | 2697 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,471 psi | 48% | 2477 fps | 95.9% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,268 psi | 80% | 2733 fps | 99.9% |
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 105 powders for .280 Rem. loaded with the .284 | 145gr | Speer Grand Slam. Alliant Reloder-26 delivers the highest muzzle velocity at 2,956 fps; across all powders the maximum-charge window runs from 1,762 fps to 2,956 fps. Accurate 3100 gives the best case fill at 100 %, and 105 of the 105 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 145.0 gr projectile in 0.284" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, Accurate MAGPRO 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-17, ReloadSwiss RS 60, Hodgdon H414 rank at the top here: for .280 Rem. with the .284 | 145gr | Speer Grand Slam they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2213, Bofors RP15 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.