Load Specifications
Load data in caliber .280 Ackley Improved with .284 | 120gr | Nosler Ballistic Tip Hunting bullet and 95 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, Alliant Reloder-17 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.
A valid access license is required to use the Personalized Load Calculator.
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>> | 84% | 57,406 psi | 88% | 3068 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 56,681 psi | 87% | 3094 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 58,276 psi | 90% | 3163 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 55,506 psi | 85% | 3084 fps | 96.5% |
| Accurate 4064 | <<locked>> | 90% | 56,695 psi | 87% | 3143 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 56,898 psi | 88% | 3228 fps | 99.5% |
| ADI AR 2206H | <<locked>> | 86% | 56,579 psi | 87% | 3173 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 92% | 57,754 psi | 89% | 3173 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 55,579 psi | 86% | 3120 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 56,724 psi | 87% | 3100 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 56,768 psi | 87% | 3304 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 58,146 psi | 89% | 3199 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 58,494 psi | 90% | 3219 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 57,928 psi | 89% | 3294 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 94% | 55,579 psi | 86% | 3271 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 41,582 psi | 64% | 2989 fps | 98.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,065 psi | 72% | 3173 fps | 98.1% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 56,637 psi | 87% | 3186 fps | 99.5% |
| Bofors RP3 | <<locked>> | 90% | 55,376 psi | 85% | 3163 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 58,784 psi | 90% | 3182 fps | 97.4% |
| Hodgdon Benchmark | <<locked>> | 84% | 57,116 psi | 88% | 3104 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 55,143 psi | 85% | 3150 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 57,392 psi | 88% | 3261 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 90% | 56,202 psi | 86% | 3173 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 96% | 56,086 psi | 86% | 3225 fps | 97.6% |
| Hodgdon H4350 | <<locked>> | 94% | 56,420 psi | 87% | 3182 fps | 96.3% |
| Hodgdon H4895 | <<locked>> | 86% | 57,159 psi | 88% | 3182 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 54,331 psi | 84% | 3153 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 56,971 psi | 88% | 3219 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 56,753 psi | 87% | 3261 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,621 psi | 55% | 1969 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 58,494 psi | 90% | 3189 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 57,377 psi | 88% | 3169 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 57,261 psi | 88% | 3156 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 56,985 psi | 88% | 3133 fps | 97.6% |
| IMR 4350 | <<locked>> | 98% | 55,593 psi | 86% | 3146 fps | 96.9% |
| IMR 4451 Enduron | <<locked>> | 94% | 56,884 psi | 88% | 3156 fps | 97.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 57,450 psi | 88% | 3219 fps | 99.6% |
| IMR 4895 | <<locked>> | 88% | 56,420 psi | 87% | 3199 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 84% | 55,579 psi | 86% | 3120 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 56,840 psi | 87% | 3150 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 56,014 psi | 86% | 3097 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 57,116 psi | 88% | 3150 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 56,536 psi | 87% | 3150 fps | 98.6% |
| Lovex S070 | <<locked>> | 98% | 57,740 psi | 89% | 3189 fps | 98% |
| Norma 201 | <<locked>> | 86% | 55,477 psi | 85% | 3117 fps | 100% |
| Norma 202 | <<locked>> | 86% | 56,072 psi | 86% | 3120 fps | 100% |
| Norma 203B | <<locked>> | 90% | 57,653 psi | 89% | 3205 fps | 99.9% |
| Norma URP | <<locked>> | 98% | 55,869 psi | 86% | 3215 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 90% | 58,726 psi | 90% | 3235 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 58,363 psi | 90% | 3264 fps | 98.7% |
| Ramshot TAC | <<locked>> | 84% | 55,883 psi | 86% | 3136 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 84% | 55,666 psi | 86% | 3159 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 82% | 56,391 psi | 87% | 3120 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,114 psi | 56% | 2014 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 58,349 psi | 90% | 3153 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 56,304 psi | 87% | 3146 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 55,564 psi | 85% | 3238 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 55,245 psi | 85% | 3271 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 56,927 psi | 88% | 3251 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 56,304 psi | 87% | 3284 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 84% | 56,333 psi | 87% | 3104 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 55,883 psi | 86% | 3114 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 55,245 psi | 85% | 3150 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 58,784 psi | 90% | 3182 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 96% | 56,536 psi | 87% | 3150 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 86% | 56,840 psi | 87% | 3150 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 57,116 psi | 88% | 3150 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 57,740 psi | 89% | 3189 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 57,014 psi | 88% | 3215 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 58,421 psi | 90% | 3176 fps | 99.3% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 55,143 psi | 85% | 3140 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 56,681 psi | 87% | 3054 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 57,290 psi | 88% | 3051 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 56,811 psi | 87% | 3097 fps | 97.6% |
| Somchem S321 | <<locked>> | 82% | 56,811 psi | 87% | 3153 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 56,246 psi | 87% | 3048 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 57,740 psi | 89% | 3163 fps | 99.9% |
| Somchem S355 | <<locked>> | 92% | 55,216 psi | 85% | 3143 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 54,143 psi | 83% | 3219 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 56,130 psi | 86% | 3012 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 56,956 psi | 88% | 3035 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 55,796 psi | 86% | 3081 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 56,594 psi | 87% | 3094 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 56,840 psi | 87% | 3127 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 58,262 psi | 90% | 3212 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 84% | 56,202 psi | 86% | 3123 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 58,523 psi | 90% | 3143 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 57,493 psi | 88% | 3215 fps | 99.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 46,122 psi | 71% | 3081 fps | 98.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 55,027 psi | 85% | 3130 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 56,130 psi | 86% | 3169 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 56,086 psi | 86% | 3225 fps | 97.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 37,333 psi | 57% | 2989 fps | 98.5% |
| Winchester StaBALL Match | <<locked>> | 86% | 55,259 psi | 85% | 3150 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% | 50,720 psi | 78% | 2966 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 43,598 psi | 67% | 2884 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 50,879 psi | 78% | 3048 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 51,982 psi | 80% | 3025 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 41,234 psi | 63% | 2871 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 37,420 psi | 58% | 2848 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 46,905 psi | 72% | 2999 fps | 99% |
| ADI AR 2208 | <<locked>> | 80% | 39,769 psi | 61% | 2828 fps | 97% |
| ADI Benchmark 8208 | <<locked>> | 80% | 48,936 psi | 75% | 3009 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 80% | 49,487 psi | 76% | 2992 fps | 100% |
| Alliant Power Pro 2000-MR | 53.3 gr | 80% | 42,772 psi | 66% | 3025 fps | 97.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 39,711 psi | 61% | 2858 fps | 98.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 42,554 psi | 65% | 2923 fps | 97.8% |
| Alliant Reloder-16 | <<locked>> | 86% | 37,086 psi | 57% | 2861 fps | 95.6% |
| Alliant Reloder-17 | 52.5 gr | 80% | 34,287 psi | 53% | 2808 fps | 96.4% |
| Alliant Reloder-23 | <<locked>> | 92% | 32,285 psi | 50% | 2743 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 94% | 37,985 psi | 58% | 2956 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 46,296 psi | 71% | 2999 fps | 98.2% |
| Bofors RP3 | <<locked>> | 80% | 39,407 psi | 61% | 2858 fps | 98.4% |
| Bofors RP7 | <<locked>> | 90% | 48,660 psi | 75% | 3002 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 50,444 psi | 78% | 2995 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,037 psi | 74% | 3025 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 53,330 psi | 82% | 3192 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 80% | 40,263 psi | 62% | 2861 fps | 95.9% |
| Hodgdon H414 | <<locked>> | 90% | 45,759 psi | 70% | 3031 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 92% | 52,808 psi | 81% | 3120 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 47,340 psi | 73% | 3012 fps | 99.4% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 32,155 psi | 49% | 2687 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 43,424 psi | 67% | 2976 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 92% | 49,240 psi | 76% | 3120 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,571 psi | 41% | 1765 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 45,310 psi | 70% | 2956 fps | 99.1% |
| IMR 3031 | <<locked>> | 80% | 47,181 psi | 73% | 3009 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 41,771 psi | 64% | 2867 fps | 97.7% |
| IMR 4166 Enduron | <<locked>> | 82% | 47,108 psi | 72% | 2949 fps | 95.5% |
| IMR 4350 | <<locked>> | 94% | 48,994 psi | 75% | 3031 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 88% | 47,282 psi | 73% | 2979 fps | 95.4% |
| IMR 4831 | <<locked>> | 86% | 36,216 psi | 56% | 2802 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 43,598 psi | 67% | 2959 fps | 98.5% |
| IMR 8208 XBR | <<locked>> | 80% | 48,936 psi | 75% | 3009 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 46,340 psi | 71% | 2976 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 46,514 psi | 72% | 2927 fps | 99% |
| Lovex S062 | <<locked>> | 80% | 41,756 psi | 64% | 2871 fps | 99.1% |
| Lovex S065 | <<locked>> | 86% | 41,582 psi | 64% | 2864 fps | 95.4% |
| Lovex S070 | <<locked>> | 90% | 44,744 psi | 69% | 2949 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 45,876 psi | 71% | 2949 fps | 99.6% |
| Norma 202 | <<locked>> | 80% | 46,340 psi | 71% | 2956 fps | 100% |
| Norma 203B | <<locked>> | 80% | 41,930 psi | 65% | 2913 fps | 98.2% |
| Norma URP | <<locked>> | 86% | 37,666 psi | 58% | 2851 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 41,553 psi | 64% | 2923 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 90% | 41,930 psi | 65% | 2956 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 48,965 psi | 75% | 3012 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 48,631 psi | 75% | 3035 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 52,924 psi | 81% | 3061 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,890 psi | 41% | 1804 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 54,897 psi | 84% | 3100 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 43,308 psi | 67% | 2904 fps | 95.1% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,049 psi | 69% | 3038 fps | 98.3% |
| ReloadSwiss RS 60 | 52.5 gr | 80% | 36,492 psi | 56% | 2887 fps | 99.3% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 37,231 psi | 57% | 2864 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 39,769 psi | 61% | 2936 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 49,893 psi | 77% | 2995 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 43,700 psi | 67% | 2894 fps | 99.3% |
| Rottweil R 903 | <<locked>> | 80% | 37,028 psi | 57% | 2792 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 90% | 48,660 psi | 75% | 3002 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 86% | 41,582 psi | 64% | 2864 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 46,340 psi | 71% | 2976 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 41,756 psi | 64% | 2871 fps | 99.1% |
| Shooters World SW4350 | <<locked>> | 90% | 44,744 psi | 69% | 2949 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,043 psi | 59% | 2848 fps | 97.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 47,355 psi | 73% | 2982 fps | 97.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 45,339 psi | 70% | 2963 fps | 98.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,137 psi | 73% | 2900 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,392 psi | 61% | 2749 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 46,833 psi | 72% | 2923 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 53,229 psi | 82% | 3097 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 46,775 psi | 72% | 2897 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,123 psi | 72% | 2979 fps | 99% |
| Somchem S355 | <<locked>> | 80% | 37,840 psi | 58% | 2802 fps | 97.6% |
| Somchem S365 | <<locked>> | 82% | 29,544 psi | 45% | 2671 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 53,055 psi | 82% | 2966 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 47,514 psi | 73% | 2890 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 43,352 psi | 67% | 2877 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 43,743 psi | 67% | 2881 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 35,955 psi | 55% | 2730 fps | 98.3% |
| Vihtavuori N160 | <<locked>> | 84% | 36,724 psi | 56% | 2792 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 49,066 psi | 75% | 3002 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 42,366 psi | 65% | 2871 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 38,667 psi | 59% | 2851 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 92% | 35,259 psi | 54% | 2838 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 31,952 psi | 49% | 2644 fps | 95.7% |
| Winchester 748 | <<locked>> | 80% | 49,052 psi | 75% | 3054 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 46,021 psi | 71% | 3035 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 96% | 32,851 psi | 51% | 2844 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 44,991 psi | 69% | 2966 fps | 99.1% |
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 113 powders for .280 Ackley Improved loaded with the .284 | 120gr | Nosler Ballistic Tip Hunting. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,304 fps; across all powders the maximum-charge window runs from 1,969 fps to 3,304 fps. Accurate 3100 gives the best case fill at 100 %, and 113 of the 113 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 120.0 gr projectile in 0.284" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-16 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 Power Pro 2000-MR, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .280 Ackley Improved with the .284 | 120gr | Nosler Ballistic Tip Hunting they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2209, Alliant Reloder-19, 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.