Load Specifications
Load data in caliber .280 Ackley Improved with .284 | 100gr | Barnes Solid bullet and 93 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, ReloadSwiss RS 52 and Alliant Power Pro 2000-MR.
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>> | 88% | 58,204 psi | 90% | 3346 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 56,768 psi | 87% | 3366 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 56,710 psi | 87% | 3360 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,158 psi | 85% | 3373 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 56,405 psi | 87% | 3402 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,663 psi | 81% | 3396 fps | 97.6% |
| Accurate LT-30 | <<locked>> | 82% | 56,840 psi | 87% | 3284 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 57,232 psi | 88% | 3310 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 57,508 psi | 88% | 3442 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 96% | 58,494 psi | 90% | 3432 fps | 99% |
| ADI AR 2219 | <<locked>> | 82% | 58,508 psi | 90% | 3422 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 56,420 psi | 87% | 3389 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 88% | 56,840 psi | 87% | 3379 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 58,204 psi | 90% | 3520 fps | 99.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 57,319 psi | 88% | 3560 fps | 98.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 58,305 psi | 90% | 3458 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 84% | 57,682 psi | 89% | 3356 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 55,245 psi | 85% | 3415 fps | 98.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,039 psi | 79% | 3402 fps | 97.6% |
| Alliant Reloder-17 | <<locked>> | 98% | 55,840 psi | 86% | 3520 fps | 99.6% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 56,608 psi | 87% | 3268 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 57,595 psi | 89% | 3445 fps | 98.6% |
| Bofors RP3 | <<locked>> | 94% | 55,492 psi | 85% | 3412 fps | 99.6% |
| Hodgdon Benchmark | <<locked>> | 88% | 58,436 psi | 90% | 3379 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 55,825 psi | 86% | 3415 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 86% | 58,059 psi | 89% | 3530 fps | 99% |
| Hodgdon H322 | <<locked>> | 84% | 56,971 psi | 88% | 3396 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 58,465 psi | 90% | 3422 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 56,652 psi | 87% | 3422 fps | 97.9% |
| Hodgdon H4895 | <<locked>> | 90% | 58,044 psi | 89% | 3455 fps | 99.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,949 psi | 72% | 3261 fps | 98.1% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 57,319 psi | 88% | 3481 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,824 psi | 54% | 2139 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 55,825 psi | 86% | 3396 fps | 99.4% |
| IMR 3031 | <<locked>> | 90% | 57,667 psi | 89% | 3448 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 58,015 psi | 89% | 3415 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 92% | 58,305 psi | 90% | 3383 fps | 95.9% |
| IMR 4198 | <<locked>> | 84% | 57,508 psi | 88% | 3317 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 98% | 57,812 psi | 89% | 3402 fps | 95.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,850 psi | 77% | 3327 fps | 97.2% |
| IMR 4895 | <<locked>> | 92% | 56,652 psi | 87% | 3455 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 88% | 56,420 psi | 87% | 3389 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 84% | 57,029 psi | 88% | 3376 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 57,130 psi | 88% | 3415 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 56,985 psi | 88% | 3356 fps | 99.2% |
| Lovex S062 | <<locked>> | 94% | 57,580 psi | 89% | 3412 fps | 99.8% |
| Lovex S065ᴾ | <<locked>> | 100% | 56,811 psi | 87% | 3389 fps | 97.1% |
| Norma 201 | <<locked>> | 90% | 55,970 psi | 86% | 3376 fps | 99.7% |
| Norma 202 | <<locked>> | 90% | 56,724 psi | 87% | 3392 fps | 100% |
| Norma 203B | <<locked>> | 94% | 58,146 psi | 89% | 3468 fps | 99.4% |
| Norma URPᴾ | <<locked>> | 100% | 51,822 psi | 80% | 3386 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 92% | 55,172 psi | 85% | 3425 fps | 98.9% |
| Ramshot TAC | <<locked>> | 88% | 57,290 psi | 88% | 3396 fps | 97.4% |
| Ramshot Wild Boar | <<locked>> | 88% | 56,536 psi | 87% | 3419 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 86% | 57,754 psi | 89% | 3386 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,172 psi | 54% | 2188 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 55,883 psi | 86% | 3373 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 57,159 psi | 88% | 3396 fps | 96.4% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 55,550 psi | 85% | 3491 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 55,637 psi | 86% | 3533 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 52,301 psi | 80% | 3415 fps | 97.4% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,779 psi | 81% | 3438 fps | 96.8% |
| Rottweil R 901 | <<locked>> | 88% | 56,826 psi | 87% | 3369 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 56,623 psi | 87% | 3376 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 96% | 55,042 psi | 85% | 3396 fps | 99.4% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 56,811 psi | 87% | 3389 fps | 97.1% |
| Shooters World Match Rifle | <<locked>> | 90% | 57,130 psi | 88% | 3415 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 57,580 psi | 89% | 3412 fps | 99.8% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,724 psi | 86% | 3337 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 57,261 psi | 88% | 3468 fps | 99.2% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 58,581 psi | 90% | 3386 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,550 psi | 85% | 3366 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 55,825 psi | 86% | 3399 fps | 99.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 57,885 psi | 89% | 3327 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 58,044 psi | 89% | 3314 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 58,044 psi | 89% | 3340 fps | 95.9% |
| Somchem S321 | <<locked>> | 86% | 58,175 psi | 89% | 3428 fps | 99.9% |
| Somchem S335 | <<locked>> | 90% | 56,942 psi | 88% | 3317 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 58,813 psi | 90% | 3425 fps | 99.3% |
| Somchem S355 | <<locked>> | 96% | 55,593 psi | 86% | 3399 fps | 99.4% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,441 psi | 71% | 3323 fps | 99.2% |
| Vihtavuori N130 | <<locked>> | 86% | 57,421 psi | 88% | 3294 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 57,885 psi | 89% | 3310 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 55,883 psi | 86% | 3346 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 57,174 psi | 88% | 3360 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 57,348 psi | 88% | 3383 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 54,563 psi | 84% | 3389 fps | 97.8% |
| Vihtavuori N530 | <<locked>> | 88% | 57,087 psi | 88% | 3389 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 92% | 55,477 psi | 85% | 3353 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 53,780 psi | 83% | 3392 fps | 97.6% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 55,695 psi | 86% | 3373 fps | 99.6% |
| Winchester 748 | <<locked>> | 88% | 56,855 psi | 87% | 3442 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 90% | 55,941 psi | 86% | 3409 fps | 99.4% |
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 2015 | <<locked>> | 80% | 45,092 psi | 69% | 3123 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,647 psi | 76% | 3245 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 37,782 psi | 58% | 3005 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,715 psi | 69% | 3179 fps | 99.4% |
| Accurate 4064 | <<locked>> | 80% | 35,708 psi | 55% | 2982 fps | 98.5% |
| Accurate 4350 | <<locked>> | 94% | 42,424 psi | 65% | 3189 fps | 95% |
| Accurate LT-30 | <<locked>> | 80% | 53,490 psi | 82% | 3228 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 53,882 psi | 83% | 3255 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 41,582 psi | 64% | 3114 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 84% | 40,161 psi | 62% | 3061 fps | 95% |
| ADI AR 2219 | <<locked>> | 80% | 54,650 psi | 84% | 3360 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,584 psi | 67% | 3136 fps | 98% |
| Alliant AR-Comp | <<locked>> | 80% | 43,294 psi | 67% | 3153 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 50,720 psi | 78% | 3383 fps | 98.8% |
| Alliant Power Pro 2000-MR | 56.7 gr | 84% | 43,511 psi | 67% | 3264 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 37,202 psi | 57% | 3022 fps | 95.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,937 psi | 78% | 3248 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 39,987 psi | 62% | 3094 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 94% | 42,264 psi | 65% | 3202 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 88% | 39,436 psi | 61% | 3159 fps | 96% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 52,924 psi | 81% | 3209 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 43,903 psi | 68% | 3176 fps | 95.7% |
| Bofors RP3 | <<locked>> | 82% | 36,796 psi | 57% | 3018 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,614 psi | 70% | 3140 fps | 98.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,511 psi | 65% | 3153 fps | 98.3% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,557 psi | 72% | 3307 fps | 97% |
| Hodgdon H322 | <<locked>> | 80% | 49,966 psi | 77% | 3278 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 50,981 psi | 78% | 3294 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 46,238 psi | 71% | 3219 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 41,901 psi | 64% | 3130 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 38,783 psi | 60% | 3074 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,927 psi | 58% | 3077 fps | 96.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,976 psi | 40% | 1919 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,393 psi | 62% | 3077 fps | 96.4% |
| IMR 3031 | <<locked>> | 80% | 41,133 psi | 63% | 3146 fps | 99.9% |
| IMR 4064 | <<locked>> | 82% | 39,595 psi | 61% | 3041 fps | 95.1% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,650 psi | 84% | 3320 fps | 95.1% |
| IMR 4198 | <<locked>> | 80% | 50,981 psi | 78% | 3212 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,476 psi | 84% | 3343 fps | 95% |
| IMR 4831 | <<locked>> | 96% | 43,671 psi | 67% | 3196 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 38,247 psi | 59% | 3061 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 80% | 43,584 psi | 67% | 3136 fps | 98% |
| Lovex D073.5 | <<locked>> | 80% | 49,400 psi | 76% | 3245 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 80% | 40,509 psi | 62% | 3094 fps | 98.7% |
| Lovex S060 | <<locked>> | 80% | 42,047 psi | 65% | 3061 fps | 96.5% |
| Lovex S062 | <<locked>> | 80% | 37,014 psi | 57% | 2989 fps | 96.3% |
| Lovex S065 | <<locked>> | 96% | 50,343 psi | 77% | 3271 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 40,712 psi | 63% | 3068 fps | 97.4% |
| Norma 202 | <<locked>> | 80% | 40,930 psi | 63% | 3087 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 39,349 psi | 61% | 3081 fps | 95.6% |
| Norma URP | <<locked>> | 94% | 42,554 psi | 65% | 3189 fps | 95% |
| Ramshot Big Game | <<locked>> | 82% | 39,030 psi | 60% | 3087 fps | 95.2% |
| Ramshot TAC | <<locked>> | 82% | 46,876 psi | 72% | 3192 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,062 psi | 66% | 3150 fps | 96.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,500 psi | 73% | 3196 fps | 97.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,150 psi | 40% | 1962 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,965 psi | 75% | 3248 fps | 99.7% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 53,519 psi | 82% | 3330 fps | 95.6% |
| ReloadSwiss RS 52 | 53.6 gr | 82% | 41,800 psi | 64% | 3209 fps | 95.6% |
| ReloadSwiss RS 60 | 53.1 gr | 80% | 32,053 psi | 49% | 2956 fps | 95.3% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 45,484 psi | 70% | 3278 fps | 95.7% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 49,313 psi | 76% | 3366 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 44,585 psi | 69% | 3140 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 80% | 38,725 psi | 60% | 3012 fps | 96.8% |
| Rottweil R 903 | <<locked>> | 84% | 36,869 psi | 57% | 3012 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 96% | 50,343 psi | 77% | 3271 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,509 psi | 62% | 3094 fps | 98.7% |
| Shooters World Precision | <<locked>> | 80% | 37,014 psi | 57% | 2989 fps | 96.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,098 psi | 80% | 3271 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 40,756 psi | 63% | 3136 fps | 95.9% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,634 psi | 79% | 3271 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 44,962 psi | 69% | 3159 fps | 95% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,277 psi | 62% | 3074 fps | 95.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,250 psi | 65% | 3041 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,925 psi | 54% | 2874 fps | 98.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,157 psi | 83% | 3274 fps | 95% |
| Somchem S321 | <<locked>> | 80% | 47,311 psi | 73% | 3232 fps | 98.9% |
| Somchem S335 | <<locked>> | 80% | 41,756 psi | 64% | 3038 fps | 99.7% |
| Somchem S341 | <<locked>> | 80% | 41,626 psi | 64% | 3094 fps | 96.2% |
| Somchem S355 | <<locked>> | 84% | 37,753 psi | 58% | 3022 fps | 95.6% |
| Somchem S365 | <<locked>> | 90% | 33,301 psi | 51% | 2989 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 47,747 psi | 73% | 3133 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,438 psi | 65% | 3045 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,913 psi | 58% | 3012 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,783 psi | 60% | 3012 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 82% | 33,794 psi | 52% | 2890 fps | 95.8% |
| Vihtavuori N160 | <<locked>> | 94% | 44,599 psi | 69% | 3196 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 43,758 psi | 67% | 3136 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 80% | 37,521 psi | 58% | 2992 fps | 98.5% |
| Vihtavuori N550 | <<locked>> | 94% | 43,918 psi | 68% | 3192 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 37,086 psi | 57% | 2979 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 43,105 psi | 66% | 3179 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,595 psi | 61% | 3074 fps | 96.3% |
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 108 powders for .280 Ackley Improved loaded with the .284 | 100gr | Barnes Solid. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,560 fps; across all powders the maximum-charge window runs from 2,139 fps to 3,560 fps. Accurate 4350 gives the best case fill at 100 %, and 108 of the 108 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 100.0 gr projectile in 0.284" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 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, ReloadSwiss RS 52, Alliant Power Pro 2000-MR rank at the top here: for .280 Ackley Improved with the .284 | 100gr | Barnes Solid they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 2700, Alliant Reloder-23, Alliant Reloder-26 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.