Load Specifications
Load data in caliber .280 Rem. with .284 | 152gr | Hasler ARIETE bullet and 95 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 ReloadSwiss RS 60.
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 2015 | <<locked>> | 82% | 52,518 psi | 89% | 2618 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 50,952 psi | 87% | 2638 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 52,765 psi | 90% | 2703 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 50,386 psi | 86% | 2641 fps | 96.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 41,742 psi | 71% | 2592 fps | 96.6% |
| Accurate 4064 | <<locked>> | 88% | 51,097 psi | 87% | 2687 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 51,024 psi | 87% | 2769 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 84% | 51,764 psi | 88% | 2717 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 90% | 53,055 psi | 90% | 2720 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 82% | 50,981 psi | 87% | 2671 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 51,721 psi | 88% | 2648 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 51,372 psi | 87% | 2831 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 52,431 psi | 89% | 2726 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 52,953 psi | 90% | 2743 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 50,183 psi | 85% | 2713 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 98% | 52,634 psi | 90% | 2828 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 92% | 50,270 psi | 86% | 2808 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,784 psi | 68% | 2621 fps | 99.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,802 psi | 76% | 2785 fps | 98.8% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 51,663 psi | 88% | 2733 fps | 99.6% |
| Bofors RP3 | <<locked>> | 88% | 49,806 psi | 85% | 2703 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 50,183 psi | 85% | 2674 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 82% | 52,460 psi | 89% | 2654 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 50,096 psi | 85% | 2697 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 50,763 psi | 86% | 2717 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 94% | 50,502 psi | 86% | 2766 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 92% | 51,285 psi | 87% | 2730 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 84% | 52,272 psi | 89% | 2726 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 52,373 psi | 89% | 2756 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 51,895 psi | 88% | 2762 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 50,894 psi | 87% | 2799 fps | 97.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,549 psi | 61% | 1680 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 50,372 psi | 86% | 2680 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 52,605 psi | 90% | 2713 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 52,533 psi | 89% | 2707 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 86% | 52,243 psi | 89% | 2684 fps | 97.8% |
| IMR 4350 | <<locked>> | 96% | 50,575 psi | 86% | 2703 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 92% | 52,098 psi | 89% | 2710 fps | 97.7% |
| IMR 4831 | <<locked>> | 98% | 51,764 psi | 88% | 2762 fps | 99.7% |
| IMR 4895 | <<locked>> | 86% | 51,488 psi | 88% | 2740 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 50,981 psi | 87% | 2671 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 51,474 psi | 88% | 2694 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 51,401 psi | 88% | 2648 fps | 99.9% |
| Lovex S062 | <<locked>> | 88% | 52,286 psi | 89% | 2700 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 51,547 psi | 88% | 2703 fps | 98.8% |
| Lovex S070 | <<locked>> | 96% | 52,489 psi | 89% | 2740 fps | 98.1% |
| Norma 201 | <<locked>> | 84% | 50,589 psi | 86% | 2664 fps | 100% |
| Norma 202 | <<locked>> | 84% | 51,126 psi | 87% | 2667 fps | 100% |
| Norma 203B | <<locked>> | 88% | 52,591 psi | 90% | 2749 fps | 100% |
| Norma 204 | <<locked>> | 96% | 50,821 psi | 87% | 2746 fps | 95.8% |
| Norma MRPᴾ | <<locked>> | 100% | 44,860 psi | 76% | 2746 fps | 96.2% |
| Norma URP | <<locked>> | 96% | 50,604 psi | 86% | 2762 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 86% | 49,676 psi | 85% | 2720 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 98% | 52,678 psi | 90% | 2808 fps | 98.8% |
| Ramshot TAC | <<locked>> | 82% | 50,850 psi | 87% | 2684 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 82% | 50,546 psi | 86% | 2703 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,897 psi | 61% | 1716 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 51,285 psi | 87% | 2703 fps | 98.2% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 50,444 psi | 86% | 2772 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 50,009 psi | 85% | 2808 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 50,879 psi | 87% | 2792 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 50,575 psi | 86% | 2818 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 82% | 51,576 psi | 88% | 2648 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 51,184 psi | 87% | 2664 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 49,995 psi | 85% | 2700 fps | 100% |
| Rottweil R 907 | <<locked>> | 92% | 50,183 psi | 85% | 2674 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 94% | 51,547 psi | 88% | 2703 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 84% | 51,474 psi | 88% | 2694 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 52,286 psi | 89% | 2700 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 52,489 psi | 89% | 2740 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 51,648 psi | 88% | 2759 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 52,707 psi | 90% | 2717 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 50,430 psi | 86% | 2694 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 52,257 psi | 89% | 2612 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 52,388 psi | 89% | 2608 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 51,721 psi | 88% | 2657 fps | 97.7% |
| Somchem S335 | <<locked>> | 84% | 51,547 psi | 88% | 2608 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 52,634 psi | 90% | 2713 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 50,183 psi | 85% | 2694 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 51,866 psi | 88% | 2812 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 48,211 psi | 82% | 2700 fps | 96.5% |
| Vihtavuori N133 | <<locked>> | 84% | 52,663 psi | 90% | 2598 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 50,836 psi | 87% | 2631 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 51,750 psi | 88% | 2648 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 51,692 psi | 88% | 2680 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 52,881 psi | 90% | 2759 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 82% | 51,329 psi | 87% | 2671 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 50,038 psi | 85% | 2648 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 51,909 psi | 88% | 2762 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 44,034 psi | 75% | 2697 fps | 99.2% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 53,011 psi | 90% | 2736 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 51,198 psi | 87% | 2713 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 50,792 psi | 86% | 2769 fps | 97.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,665 psi | 61% | 2631 fps | 99.3% |
| Winchester StaBALL Match | <<locked>> | 84% | 49,995 psi | 85% | 2694 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 2015 | <<locked>> | 80% | 49,298 psi | 84% | 2572 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,597 psi | 71% | 2497 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 49,255 psi | 84% | 2651 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 44,338 psi | 75% | 2536 fps | 95.2% |
| Accurate 3100 | <<locked>> | 98% | 38,754 psi | 66% | 2536 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 39,363 psi | 67% | 2497 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 33,301 psi | 57% | 2431 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 45,513 psi | 77% | 2612 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 80% | 38,725 psi | 66% | 2467 fps | 98% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,630 psi | 81% | 2618 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 48,399 psi | 82% | 2602 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 41,698 psi | 71% | 2654 fps | 98.6% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 46,079 psi | 78% | 2625 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 38,493 psi | 66% | 2490 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 41,118 psi | 70% | 2549 fps | 98.6% |
| Alliant Reloder-16 | <<locked>> | 82% | 31,778 psi | 54% | 2395 fps | 95.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 33,127 psi | 56% | 2464 fps | 97.6% |
| Alliant Reloder-23 | <<locked>> | 90% | 29,008 psi | 49% | 2352 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 92% | 33,576 psi | 57% | 2530 fps | 95% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,933 psi | 76% | 2621 fps | 98.9% |
| Bofors RP3 | <<locked>> | 80% | 37,971 psi | 65% | 2493 fps | 99.1% |
| Bofors RP7 | <<locked>> | 88% | 44,367 psi | 76% | 2572 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 49,414 psi | 84% | 2605 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,789 psi | 80% | 2644 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 38,972 psi | 66% | 2500 fps | 97% |
| Hodgdon H414 | <<locked>> | 88% | 41,249 psi | 70% | 2598 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 90% | 48,225 psi | 82% | 2680 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 80% | 45,934 psi | 78% | 2621 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 27,195 psi | 46% | 2247 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 42,163 psi | 72% | 2598 fps | 99.7% |
| Hodgdon Superformance | 52.1 gr | 90% | 44,034 psi | 75% | 2674 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,469 psi | 45% | 1499 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 44,193 psi | 75% | 2579 fps | 99.6% |
| IMR 3031 | <<locked>> | 80% | 45,803 psi | 78% | 2612 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,683 psi | 69% | 2500 fps | 98.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 43,323 psi | 74% | 2526 fps | 95.9% |
| IMR 4350 | <<locked>> | 92% | 44,483 psi | 76% | 2598 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 84% | 40,712 psi | 69% | 2503 fps | 95% |
| IMR 4831 | <<locked>> | 84% | 32,343 psi | 55% | 2392 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 42,163 psi | 72% | 2579 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 80% | 47,630 psi | 81% | 2618 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 44,759 psi | 76% | 2592 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,527 psi | 78% | 2552 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 40,538 psi | 69% | 2503 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 37,724 psi | 64% | 2451 fps | 95.7% |
| Lovex S070 | <<locked>> | 88% | 40,538 psi | 69% | 2526 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 44,411 psi | 76% | 2562 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 45,078 psi | 77% | 2575 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,509 psi | 69% | 2539 fps | 98.9% |
| Norma 204 | <<locked>> | 94% | 47,732 psi | 81% | 2694 fps | 95% |
| Norma MRP | <<locked>> | 98% | 41,858 psi | 71% | 2684 fps | 95.2% |
| Norma URP | <<locked>> | 84% | 33,939 psi | 58% | 2441 fps | 95.9% |
| Ramshot Big Game | <<locked>> | 80% | 40,408 psi | 69% | 2559 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 37,710 psi | 64% | 2533 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 47,630 psi | 81% | 2631 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 47,253 psi | 80% | 2651 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,629 psi | 45% | 1532 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 39,218 psi | 67% | 2480 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 43,714 psi | 74% | 2654 fps | 99% |
| ReloadSwiss RS 60 | 43.8 gr | 80% | 35,346 psi | 60% | 2526 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 33,185 psi | 56% | 2448 fps | 95.3% |
| ReloadSwiss RS 70 | 47.8 gr | 86% | 35,723 psi | 61% | 2516 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 48,530 psi | 83% | 2602 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 42,206 psi | 72% | 2516 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 80% | 35,708 psi | 61% | 2438 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 44,367 psi | 76% | 2572 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 84% | 37,724 psi | 64% | 2451 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,759 psi | 76% | 2592 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,538 psi | 69% | 2503 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 40,538 psi | 69% | 2526 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,811 psi | 63% | 2490 fps | 98.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,977 psi | 78% | 2608 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 44,106 psi | 75% | 2585 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 46,035 psi | 78% | 2520 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 38,319 psi | 65% | 2388 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 42,221 psi | 72% | 2500 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 45,382 psi | 77% | 2516 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,716 psi | 78% | 2602 fps | 99.5% |
| Somchem S355 | <<locked>> | 80% | 36,463 psi | 62% | 2441 fps | 98.4% |
| Somchem S365 | <<locked>> | 80% | 26,382 psi | 45% | 2277 fps | 96.2% |
| Somchem S385 | <<locked>> | 98% | 44,947 psi | 77% | 2644 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 46,470 psi | 79% | 2510 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 42,105 psi | 72% | 2500 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,670 psi | 73% | 2510 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,809 psi | 59% | 2382 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 82% | 33,098 psi | 56% | 2388 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 47,906 psi | 82% | 2618 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 41,133 psi | 70% | 2503 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 34,824 psi | 59% | 2441 fps | 95.9% |
| Vihtavuori N555 | <<locked>> | 90% | 31,241 psi | 53% | 2425 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,705 psi | 52% | 2313 fps | 96.8% |
| Winchester 748 | <<locked>> | 80% | 47,790 psi | 81% | 2664 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 41,510 psi | 71% | 2602 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 94% | 29,254 psi | 50% | 2438 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,642 psi | 74% | 2589 fps | 99.6% |
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 115 powders for .280 Rem. loaded with the .284 | 152gr | Hasler ARIETE. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,831 fps; across all powders the maximum-charge window runs from 1,680 fps to 2,831 fps. Accurate 3100 gives the best case fill at 100 %, and 115 of the 115 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (405 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 152.0 gr projectile in 0.284" calls for a 1:9.0 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, ReloadSwiss RS 60 rank at the top here: for .280 Rem. with the .284 | 152gr | Hasler ARIETE they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate High Country, ADI AR 2213, Alliant Reloder-22 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.