Load Specifications
Load data in caliber .280 Ackley Improved with .284 | 108gr | Reichenberg Spezial Jagd bullet and 99 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Power Pro 2000-MR and ReloadSwiss RS 52.
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>> | 86% | 58,740 psi | 90% | 3245 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 57,392 psi | 88% | 3271 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 57,682 psi | 89% | 3264 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,970 psi | 86% | 3284 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 56,942 psi | 88% | 3248 fps | 95.9% |
| Accurate 4064 | <<locked>> | 92% | 57,682 psi | 89% | 3314 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 58,276 psi | 90% | 3399 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 88% | 57,972 psi | 89% | 3350 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 92% | 55,448 psi | 85% | 3284 fps | 99.2% |
| ADI Benchmark 8208 | <<locked>> | 86% | 56,840 psi | 87% | 3297 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 57,769 psi | 89% | 3278 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 58,726 psi | 90% | 3422 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 58,160 psi | 89% | 3481 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,550 psi | 85% | 3310 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 82% | 57,885 psi | 89% | 3251 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 56,188 psi | 86% | 3333 fps | 99.3% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 55,361 psi | 85% | 3399 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 96% | 56,884 psi | 88% | 3445 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,711 psi | 61% | 3074 fps | 97.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 44,672 psi | 69% | 3251 fps | 96.4% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 58,088 psi | 89% | 3360 fps | 99.3% |
| Bofors RP3 | <<locked>> | 92% | 56,275 psi | 87% | 3327 fps | 99.9% |
| Bofors RP7 | <<locked>> | 96% | 56,376 psi | 87% | 3284 fps | 96% |
| Hodgdon Benchmark | <<locked>> | 86% | 58,624 psi | 90% | 3284 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 56,492 psi | 87% | 3323 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 58,668 psi | 90% | 3438 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 82% | 57,537 psi | 89% | 3297 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 57,493 psi | 88% | 3343 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 98% | 57,072 psi | 88% | 3386 fps | 96.9% |
| Hodgdon H4895 | <<locked>> | 88% | 58,581 psi | 90% | 3363 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,692 psi | 80% | 3258 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 58,407 psi | 90% | 3396 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 58,581 psi | 90% | 3428 fps | 96.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,360 psi | 54% | 2080 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 56,217 psi | 86% | 3304 fps | 99.8% |
| IMR 3031 | <<locked>> | 88% | 58,581 psi | 90% | 3350 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 58,378 psi | 90% | 3327 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 90% | 58,697 psi | 90% | 3304 fps | 97.1% |
| IMR 4198 | <<locked>> | 82% | 57,551 psi | 89% | 3209 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 56,811 psi | 87% | 3310 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 96% | 58,262 psi | 90% | 3320 fps | 96.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 54,621 psi | 84% | 3320 fps | 98.8% |
| IMR 4895 | <<locked>> | 90% | 57,638 psi | 89% | 3373 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 86% | 56,840 psi | 87% | 3297 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 57,334 psi | 88% | 3281 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 57,972 psi | 89% | 3323 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 57,450 psi | 88% | 3271 fps | 99.7% |
| Lovex S062 | <<locked>> | 92% | 58,421 psi | 90% | 3327 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 57,769 psi | 89% | 3317 fps | 98.1% |
| Lovex S070 | <<locked>> | 98% | 55,332 psi | 85% | 3291 fps | 96.7% |
| Norma 201 | <<locked>> | 88% | 56,724 psi | 87% | 3291 fps | 100% |
| Norma 202 | <<locked>> | 88% | 57,261 psi | 88% | 3297 fps | 100% |
| Norma 203B | <<locked>> | 90% | 55,361 psi | 85% | 3320 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 56,971 psi | 88% | 3383 fps | 99% |
| Ramshot Big Game | <<locked>> | 90% | 56,231 psi | 87% | 3346 fps | 99.6% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 55,854 psi | 86% | 3369 fps | 97.5% |
| Ramshot TAC | <<locked>> | 86% | 57,580 psi | 89% | 3310 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 86% | 57,058 psi | 88% | 3330 fps | 99.6% |
| Ramshot X-Terminator | <<locked>> | 84% | 58,030 psi | 89% | 3297 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,766 psi | 55% | 2129 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 56,333 psi | 87% | 3278 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 57,783 psi | 89% | 3317 fps | 97.5% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 56,884 psi | 88% | 3412 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 56,652 psi | 87% | 3448 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 58,088 psi | 89% | 3419 fps | 99% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 57,653 psi | 89% | 3448 fps | 98.8% |
| Rottweil R 901 | <<locked>> | 86% | 57,334 psi | 88% | 3274 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 57,101 psi | 88% | 3287 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 56,115 psi | 86% | 3317 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 96% | 56,376 psi | 87% | 3284 fps | 96% |
| Shooters World Long Rifle | <<locked>> | 98% | 57,769 psi | 89% | 3317 fps | 98.1% |
| Shooters World Match Rifle | <<locked>> | 88% | 57,972 psi | 89% | 3323 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 58,421 psi | 90% | 3327 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 55,332 psi | 85% | 3291 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 58,291 psi | 90% | 3389 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 56,028 psi | 86% | 3284 fps | 98.4% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 56,594 psi | 87% | 3317 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 58,073 psi | 89% | 3228 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 58,595 psi | 90% | 3222 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 58,407 psi | 90% | 3264 fps | 97% |
| Somchem S321 | <<locked>> | 84% | 58,378 psi | 90% | 3330 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 57,595 psi | 89% | 3225 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,347 psi | 85% | 3271 fps | 99.5% |
| Somchem S355 | <<locked>> | 94% | 56,536 psi | 87% | 3317 fps | 99.8% |
| Somchem S365ᴾ | <<locked>> | 100% | 51,111 psi | 79% | 3317 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 57,754 psi | 89% | 3196 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 58,233 psi | 90% | 3212 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 56,724 psi | 87% | 3251 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 57,957 psi | 89% | 3271 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 58,102 psi | 89% | 3294 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 55,840 psi | 86% | 3320 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 86% | 57,493 psi | 88% | 3297 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 56,231 psi | 87% | 3261 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 58,769 psi | 90% | 3383 fps | 99% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,482 psi | 67% | 3163 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 56,434 psi | 87% | 3294 fps | 99.9% |
| Winchester 748 | <<locked>> | 86% | 57,595 psi | 89% | 3350 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 57,363 psi | 88% | 3389 fps | 97% |
| Winchester StaBALL Match | <<locked>> | 88% | 56,507 psi | 87% | 3323 fps | 99.8% |
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% | 48,704 psi | 75% | 3087 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 53,534 psi | 82% | 3209 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,437 psi | 64% | 2986 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,530 psi | 75% | 3156 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 53,388 psi | 82% | 3186 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 39,160 psi | 60% | 2969 fps | 99.6% |
| Accurate 4350 | <<locked>> | 90% | 40,828 psi | 63% | 3064 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 44,831 psi | 69% | 3100 fps | 98% |
| ADI AR 2208 | <<locked>> | 80% | 38,130 psi | 59% | 2920 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,891 psi | 72% | 3117 fps | 99.2% |
| Alliant AR-Comp | <<locked>> | 80% | 47,137 psi | 73% | 3114 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 54,955 psi | 85% | 3356 fps | 99.7% |
| Alliant Power Pro 2000-MR | 55.1 gr | 80% | 40,944 psi | 63% | 3117 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,840 psi | 58% | 2946 fps | 97.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 54,505 psi | 84% | 3199 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,567 psi | 62% | 3018 fps | 96.4% |
| Alliant Reloder-16 | <<locked>> | 90% | 40,364 psi | 62% | 3074 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 82% | 35,012 psi | 54% | 2956 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 96% | 34,882 psi | 54% | 2943 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 41,466 psi | 64% | 3169 fps | 95.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,353 psi | 68% | 3100 fps | 96.9% |
| Bofors RP3 | <<locked>> | 80% | 37,550 psi | 58% | 2949 fps | 97.1% |
| Bofors RP7 | <<locked>> | 94% | 53,098 psi | 82% | 3225 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,588 psi | 75% | 3110 fps | 99.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 46,021 psi | 71% | 3133 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,865 psi | 78% | 3301 fps | 98.7% |
| Hodgdon H322 | <<locked>> | 80% | 53,824 psi | 83% | 3241 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 41,118 psi | 63% | 3015 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 94% | 50,009 psi | 77% | 3255 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 45,281 psi | 70% | 3114 fps | 98.5% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 34,722 psi | 53% | 2884 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,336 psi | 64% | 3071 fps | 98.1% |
| Hodgdon Superformance | <<locked>> | 96% | 54,230 psi | 83% | 3353 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,208 psi | 40% | 1864 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,555 psi | 67% | 3061 fps | 98.2% |
| IMR 3031 | <<locked>> | 80% | 44,976 psi | 69% | 3123 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,030 psi | 62% | 2966 fps | 96.3% |
| IMR 4166 Enduron | <<locked>> | 86% | 51,735 psi | 80% | 3179 fps | 95.6% |
| IMR 4198 | <<locked>> | 80% | 54,389 psi | 84% | 3159 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 53,258 psi | 82% | 3248 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 92% | 51,619 psi | 79% | 3202 fps | 95.5% |
| IMR 4831 | <<locked>> | 90% | 39,189 psi | 60% | 3005 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 41,568 psi | 64% | 3054 fps | 97.3% |
| IMR 8208 XBR | <<locked>> | 80% | 46,891 psi | 72% | 3117 fps | 99.2% |
| Lovex D073.5 | <<locked>> | 80% | 53,519 psi | 82% | 3219 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 44,193 psi | 68% | 3081 fps | 99.7% |
| Lovex S060 | <<locked>> | 80% | 44,788 psi | 69% | 3035 fps | 98.1% |
| Lovex S062 | <<locked>> | 80% | 39,943 psi | 61% | 2969 fps | 98.1% |
| Lovex S065 | <<locked>> | 90% | 44,933 psi | 69% | 3071 fps | 95.4% |
| Lovex S070 | <<locked>> | 94% | 48,631 psi | 75% | 3166 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 43,947 psi | 68% | 3051 fps | 98.9% |
| Norma 202 | <<locked>> | 80% | 44,309 psi | 68% | 3064 fps | 99.9% |
| Norma 203B | <<locked>> | 80% | 39,958 psi | 61% | 3005 fps | 96.8% |
| Norma URP | <<locked>> | 90% | 40,843 psi | 63% | 3061 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 39,639 psi | 61% | 3015 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 94% | 45,687 psi | 70% | 3169 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 47,094 psi | 72% | 3114 fps | 96.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,659 psi | 72% | 3140 fps | 98.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,763 psi | 78% | 3169 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,658 psi | 41% | 1909 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,562 psi | 81% | 3215 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 47,268 psi | 73% | 3120 fps | 95.2% |
| ReloadSwiss RS 52 | 53.4 gr | 80% | 42,757 psi | 66% | 3133 fps | 96.9% |
| ReloadSwiss RS 60 | 54.3 gr | 80% | 34,925 psi | 54% | 2969 fps | 98% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 40,625 psi | 63% | 3077 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 43,627 psi | 67% | 3159 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 47,761 psi | 73% | 3110 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,872 psi | 64% | 2995 fps | 98.5% |
| Rottweil R 903 | <<locked>> | 80% | 35,346 psi | 54% | 2884 fps | 96% |
| Rottweil R 907 | <<locked>> | 94% | 53,098 psi | 82% | 3225 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 44,933 psi | 69% | 3071 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,193 psi | 68% | 3081 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 39,943 psi | 61% | 2969 fps | 98.1% |
| Shooters World SW4350 | <<locked>> | 94% | 48,631 psi | 75% | 3166 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,216 psi | 56% | 2933 fps | 95.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,397 psi | 70% | 3084 fps | 96.3% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,439 psi | 67% | 3061 fps | 97.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,208 psi | 70% | 3009 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,637 psi | 58% | 2848 fps | 99.8% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 51,126 psi | 79% | 3136 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 51,140 psi | 79% | 3209 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 44,933 psi | 69% | 3009 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,194 psi | 70% | 3084 fps | 98% |
| Somchem S355 | <<locked>> | 80% | 36,071 psi | 55% | 2890 fps | 96.1% |
| Somchem S365 | <<locked>> | 86% | 31,937 psi | 49% | 2867 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 50,995 psi | 78% | 3091 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,527 psi | 70% | 3005 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,205 psi | 63% | 2986 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,018 psi | 65% | 2992 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 34,389 psi | 53% | 2822 fps | 97% |
| Vihtavuori N160 | <<locked>> | 88% | 39,900 psi | 61% | 2999 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 47,166 psi | 73% | 3117 fps | 99.3% |
| Vihtavuori N540 | <<locked>> | 80% | 40,611 psi | 62% | 2972 fps | 99.6% |
| Vihtavuori N550 | <<locked>> | 90% | 42,134 psi | 65% | 3064 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 96% | 38,014 psi | 58% | 3038 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 34,896 psi | 54% | 2844 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 46,760 psi | 72% | 3156 fps | 99.7% |
| Winchester 760 | <<locked>> | 94% | 50,009 psi | 77% | 3255 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,931 psi | 66% | 3064 fps | 98.1% |
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 111 powders for .280 Ackley Improved loaded with the .284 | 108gr | Reichenberg Spezial Jagd. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,481 fps; across all powders the maximum-charge window runs from 2,080 fps to 3,481 fps. Accurate 3100 gives the best case fill at 100 %, and 111 of the 111 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 108.0 gr projectile in 0.284" calls for a 1:16.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, 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 60, Alliant Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for .280 Ackley Improved with the .284 | 108gr | Reichenberg Spezial Jagd they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, ADI AR 2209, Alliant Reloder-19 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.