Load Specifications
Load data in caliber .280 Rem. with .284 | 168gr | TWENTY-NINE ERTP bullet and 96 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance and Alliant Reloder-17.
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% | 51,924 psi | 88% | 2500 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 50,227 psi | 86% | 2500 fps | 97.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,585 psi | 78% | 2523 fps | 98.3% |
| Accurate 4064 | <<locked>> | 86% | 51,866 psi | 88% | 2543 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 51,619 psi | 88% | 2631 fps | 99.9% |
| Accurate High Countryᴾ | <<locked>> | 100% | 49,661 psi | 85% | 2700 fps | 95.9% |
| ADI AR 2206H | <<locked>> | 82% | 51,851 psi | 88% | 2569 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 52,837 psi | 90% | 2572 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,011 psi | 90% | 2661 fps | 97.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 51,097 psi | 87% | 2677 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 52,823 psi | 90% | 2661 fps | 97.4% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 52,823 psi | 90% | 2661 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 49,937 psi | 85% | 2549 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 50,299 psi | 86% | 2566 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 52,968 psi | 90% | 2687 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 50,241 psi | 86% | 2661 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,040 psi | 89% | 2651 fps | 97.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 45,890 psi | 78% | 2595 fps | 96% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,076 psi | 73% | 2549 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 37,855 psi | 64% | 2461 fps | 97% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,660 psi | 83% | 2717 fps | 99.8% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 51,285 psi | 87% | 2582 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 50,386 psi | 86% | 2562 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 45,890 psi | 78% | 2595 fps | 96% |
| Bofors RP7 | <<locked>> | 90% | 50,415 psi | 86% | 2539 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 86% | 50,850 psi | 87% | 2572 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 92% | 50,792 psi | 86% | 2628 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 90% | 51,358 psi | 87% | 2592 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 82% | 52,373 psi | 89% | 2579 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 52,663 psi | 90% | 2612 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 51,953 psi | 88% | 2612 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 50,604 psi | 86% | 2657 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,897 psi | 61% | 1585 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 49,951 psi | 85% | 2530 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 52,620 psi | 90% | 2556 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 52,272 psi | 89% | 2556 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 51,938 psi | 88% | 2539 fps | 98.5% |
| IMR 4350 | <<locked>> | 94% | 50,517 psi | 86% | 2566 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 90% | 52,170 psi | 89% | 2569 fps | 98.5% |
| IMR 4831 | <<locked>> | 96% | 52,272 psi | 89% | 2625 fps | 99.9% |
| IMR 4895 | <<locked>> | 84% | 51,576 psi | 88% | 2592 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 51,488 psi | 88% | 2543 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 51,329 psi | 87% | 2503 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 52,301 psi | 89% | 2552 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 51,692 psi | 88% | 2566 fps | 99.3% |
| Lovex S070 | <<locked>> | 94% | 52,591 psi | 90% | 2598 fps | 98.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 37,971 psi | 65% | 2388 fps | 96.6% |
| Norma 201 | <<locked>> | 82% | 50,763 psi | 86% | 2520 fps | 100% |
| Norma 202 | <<locked>> | 82% | 51,140 psi | 87% | 2516 fps | 100% |
| Norma 203B | <<locked>> | 86% | 52,765 psi | 90% | 2602 fps | 100% |
| Norma 204 | <<locked>> | 94% | 50,749 psi | 86% | 2608 fps | 96.8% |
| Norma MRPᴾ | <<locked>> | 100% | 48,240 psi | 82% | 2671 fps | 98% |
| Norma URP | <<locked>> | 94% | 50,792 psi | 86% | 2618 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 86% | 53,142 psi | 90% | 2625 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 52,924 psi | 90% | 2667 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,390 psi | 62% | 1621 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 50,995 psi | 87% | 2556 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 50,459 psi | 86% | 2621 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 50,096 psi | 85% | 2657 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 51,387 psi | 87% | 2654 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 50,473 psi | 86% | 2677 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 84% | 51,343 psi | 87% | 2520 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 50,227 psi | 86% | 2556 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 51,547 psi | 88% | 2585 fps | 95.8% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 50,937 psi | 87% | 2638 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 90% | 50,415 psi | 86% | 2539 fps | 97.8% |
| Shooters World Long Rifle | <<locked>> | 92% | 51,692 psi | 88% | 2566 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 82% | 51,488 psi | 88% | 2543 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 52,301 psi | 89% | 2552 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 52,591 psi | 90% | 2598 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 51,619 psi | 88% | 2612 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 52,663 psi | 90% | 2572 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 50,111 psi | 85% | 2543 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 51,706 psi | 88% | 2457 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 52,286 psi | 89% | 2461 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 51,474 psi | 88% | 2520 fps | 98.4% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,444 psi | 86% | 2631 fps | 97.1% |
| Somchem S335 | <<locked>> | 82% | 51,503 psi | 88% | 2461 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 52,214 psi | 89% | 2559 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 50,531 psi | 86% | 2552 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 52,344 psi | 89% | 2667 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,895 psi | 88% | 2621 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 82% | 52,156 psi | 89% | 2441 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 51,271 psi | 87% | 2484 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 51,576 psi | 88% | 2500 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 51,721 psi | 88% | 2533 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 53,026 psi | 90% | 2615 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 44,556 psi | 76% | 2490 fps | 96.1% |
| Vihtavuori N540 | <<locked>> | 86% | 53,011 psi | 90% | 2539 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 51,996 psi | 89% | 2618 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,863 psi | 81% | 2618 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 52,779 psi | 90% | 2592 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 51,097 psi | 87% | 2631 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,827 psi | 66% | 2582 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 49,922 psi | 85% | 2549 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 48,646 psi | 83% | 2559 fps | 96.4% |
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% | 45,542 psi | 78% | 2411 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,092 psi | 75% | 2398 fps | 96.2% |
| Accurate 3100 | <<locked>> | 92% | 34,795 psi | 59% | 2323 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 43,105 psi | 73% | 2415 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,082 psi | 55% | 2274 fps | 96.4% |
| Accurate High Country | <<locked>> | 98% | 46,528 psi | 79% | 2644 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 48,733 psi | 83% | 2523 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 41,394 psi | 70% | 2385 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 94% | 43,729 psi | 74% | 2503 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,657 psi | 76% | 2569 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 43,729 psi | 74% | 2507 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 43,729 psi | 74% | 2507 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,292 psi | 70% | 2408 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,324 psi | 75% | 2470 fps | 99.6% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,039 psi | 55% | 2280 fps | 96.5% |
| Alliant Reloder-17 | 42.1 gr | 80% | 35,708 psi | 61% | 2395 fps | 99.1% |
| Alliant Reloder-19 | <<locked>> | 94% | 43,178 psi | 74% | 2500 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 98% | 42,786 psi | 73% | 2539 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 84% | 26,411 psi | 45% | 2159 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 96% | 33,504 psi | 57% | 2356 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 88% | 31,908 psi | 54% | 2365 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,921 psi | 82% | 2530 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 41,220 psi | 70% | 2415 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 42,786 psi | 73% | 2539 fps | 95.1% |
| Bofors RP7 | <<locked>> | 82% | 39,233 psi | 67% | 2343 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 41,698 psi | 71% | 2421 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 82% | 36,637 psi | 62% | 2369 fps | 95% |
| Hodgdon H4350 | <<locked>> | 84% | 42,322 psi | 72% | 2438 fps | 95.2% |
| Hodgdon H4895 | <<locked>> | 80% | 49,211 psi | 84% | 2530 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,660 psi | 50% | 2192 fps | 97.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,469 psi | 77% | 2513 fps | 100% |
| Hodgdon Superformance | 47.9 gr | 86% | 41,046 psi | 70% | 2487 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,731 psi | 46% | 1411 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,920 psi | 80% | 2484 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 49,226 psi | 84% | 2510 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,468 psi | 74% | 2415 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,905 psi | 78% | 2441 fps | 97.4% |
| IMR 4350 | <<locked>> | 86% | 39,682 psi | 68% | 2375 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 38,348 psi | 65% | 2326 fps | 95.3% |
| IMR 4831 | <<locked>> | 80% | 31,067 psi | 53% | 2234 fps | 96.1% |
| IMR 4895 | <<locked>> | 80% | 45,455 psi | 77% | 2497 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 48,269 psi | 82% | 2500 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,269 psi | 82% | 2457 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 43,584 psi | 74% | 2418 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 35,853 psi | 61% | 2280 fps | 96.1% |
| Lovex S070 | <<locked>> | 82% | 36,172 psi | 62% | 2306 fps | 95% |
| Lovex S071 | <<locked>> | 98% | 35,491 psi | 60% | 2339 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 47,630 psi | 81% | 2470 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,008 psi | 82% | 2474 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,700 psi | 74% | 2457 fps | 99.8% |
| Norma 204 | <<locked>> | 90% | 44,643 psi | 76% | 2503 fps | 95.2% |
| Norma MRP | <<locked>> | 94% | 39,581 psi | 67% | 2507 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 32,198 psi | 55% | 2270 fps | 96.3% |
| Ramshot Big Game | <<locked>> | 80% | 43,410 psi | 74% | 2474 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 35,853 psi | 61% | 2362 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,253 psi | 46% | 1450 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,134 psi | 72% | 2408 fps | 97.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,224 psi | 80% | 2572 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,985 psi | 65% | 2451 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 31,691 psi | 54% | 2287 fps | 95.9% |
| ReloadSwiss RS 70 | 43.9 gr | 82% | 33,750 psi | 57% | 2343 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 45,310 psi | 77% | 2428 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 38,725 psi | 66% | 2365 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 96% | 48,341 psi | 82% | 2536 fps | 95% |
| Rottweil R 905 | <<locked>> | 96% | 44,599 psi | 76% | 2530 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 82% | 39,233 psi | 67% | 2343 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,853 psi | 61% | 2280 fps | 96.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,269 psi | 82% | 2500 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,584 psi | 74% | 2418 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 36,172 psi | 62% | 2306 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,798 psi | 68% | 2415 fps | 99.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,168 psi | 84% | 2520 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,108 psi | 80% | 2497 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,820 psi | 83% | 2415 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,901 psi | 70% | 2297 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 37,434 psi | 64% | 2277 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 44,208 psi | 75% | 2526 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 48,443 psi | 82% | 2418 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,747 psi | 83% | 2510 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 39,465 psi | 67% | 2369 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 29,037 psi | 49% | 2234 fps | 98.5% |
| Somchem S385 | <<locked>> | 92% | 39,885 psi | 68% | 2418 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 49,240 psi | 84% | 2405 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,252 psi | 77% | 2402 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,455 psi | 77% | 2411 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,478 psi | 64% | 2306 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 33,649 psi | 57% | 2274 fps | 96.7% |
| Vihtavuori N165 | <<locked>> | 98% | 41,800 psi | 71% | 2441 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 80% | 43,801 psi | 75% | 2405 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,011 psi | 56% | 2270 fps | 96.3% |
| Vihtavuori N555 | <<locked>> | 84% | 28,500 psi | 49% | 2228 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,069 psi | 56% | 2251 fps | 98.6% |
| Winchester 760 | <<locked>> | 82% | 36,637 psi | 62% | 2369 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 88% | 26,281 psi | 45% | 2228 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,905 psi | 80% | 2503 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 45,223 psi | 77% | 2503 fps | 95.5% |
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 96 powders for .280 Rem. loaded with the .284 | 168gr | TWENTY-NINE ERTP. Alliant Reloder-26 delivers the highest muzzle velocity at 2,717 fps; across all powders the maximum-charge window runs from 1,585 fps to 2,717 fps. Accurate 3100 gives the best case fill at 100 %, and 96 of the 96 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 168.0 gr projectile in 0.284" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, ADI AR 2209 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 70, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .280 Rem. with the .284 | 168gr | TWENTY-NINE ERTP they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.