Load Specifications
Load data in caliber 5.6 x 57 with .224 | 62gr | Barnes TAC-X bullet and 93 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, ReloadSwiss RS 60 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.
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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 86% | 55,259 psi | 87% | 3323 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 53,882 psi | 84% | 3343 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 57,450 psi | 90% | 3392 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,391 psi | 88% | 3415 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 57,334 psi | 90% | 3438 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 54,157 psi | 85% | 3448 fps | 98.2% |
| ADI AR 2206H | <<locked>> | 88% | 54,969 psi | 86% | 3422 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 94% | 56,086 psi | 88% | 3415 fps | 98.9% |
| ADI Benchmark 8208 | <<locked>> | 88% | 57,595 psi | 90% | 3435 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 86% | 54,244 psi | 85% | 3360 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,303 psi | 87% | 3494 fps | 99.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,882 psi | 86% | 3543 fps | 98.8% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 55,695 psi | 87% | 3438 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,840 psi | 88% | 3438 fps | 99.7% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,766 psi | 86% | 3337 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 56,449 psi | 88% | 3461 fps | 99% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 52,069 psi | 82% | 3451 fps | 98.2% |
| Alliant Reloder-17 | <<locked>> | 98% | 57,290 psi | 90% | 3570 fps | 99.8% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 57,624 psi | 90% | 3307 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,998 psi | 86% | 3425 fps | 98.5% |
| Bofors RP3 | <<locked>> | 94% | 56,333 psi | 88% | 3451 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,651 psi | 87% | 3360 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 88% | 57,058 psi | 89% | 3458 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,071 psi | 86% | 3501 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 82% | 54,447 psi | 85% | 3379 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,622 psi | 87% | 3396 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 53,911 psi | 84% | 3399 fps | 97.7% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 57,334 psi | 90% | 3507 fps | 96.3% |
| Hodgdon H4895 | <<locked>> | 88% | 55,521 psi | 87% | 3435 fps | 99.5% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,979 psi | 75% | 3304 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,824 psi | 86% | 3461 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,940 psi | 55% | 2165 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 57,072 psi | 89% | 3442 fps | 99.6% |
| IMR 3031 | <<locked>> | 88% | 55,216 psi | 87% | 3428 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,419 psi | 87% | 3399 fps | 99% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,970 psi | 88% | 3373 fps | 95.9% |
| IMR 4198 | <<locked>> | 82% | 55,201 psi | 87% | 3304 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 51,097 psi | 80% | 3373 fps | 97.8% |
| IMR 4895 | <<locked>> | 90% | 54,346 psi | 85% | 3438 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 88% | 57,595 psi | 90% | 3435 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 84% | 57,609 psi | 90% | 3412 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,563 psi | 86% | 3392 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,621 psi | 86% | 3346 fps | 99.2% |
| Lovex S062 | <<locked>> | 92% | 55,056 psi | 86% | 3396 fps | 99.8% |
| Lovex S065 | <<locked>> | 98% | 54,491 psi | 85% | 3373 fps | 97% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,274 psi | 87% | 3406 fps | 96% |
| Norma 201 | <<locked>> | 90% | 56,971 psi | 89% | 3419 fps | 99.9% |
| Norma 202 | <<locked>> | 90% | 57,682 psi | 90% | 3428 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,608 psi | 87% | 3448 fps | 99.3% |
| Norma URPᴾ | <<locked>> | 100% | 53,084 psi | 83% | 3432 fps | 98% |
| Ramshot Big Game | <<locked>> | 92% | 56,869 psi | 89% | 3478 fps | 99.3% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,373 psi | 82% | 3419 fps | 96.2% |
| Ramshot TAC | <<locked>> | 86% | 54,505 psi | 85% | 3373 fps | 97.2% |
| Ramshot Wild Boar | <<locked>> | 88% | 57,638 psi | 90% | 3461 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,245 psi | 87% | 3369 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,027 psi | 55% | 2211 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 56,898 psi | 89% | 3415 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,462 psi | 85% | 3376 fps | 96.3% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 57,130 psi | 90% | 3540 fps | 99.1% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 57,217 psi | 90% | 3583 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,896 psi | 84% | 3465 fps | 98% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 54,041 psi | 85% | 3494 fps | 97.6% |
| Rottweil R 901 | <<locked>> | 88% | 57,566 psi | 90% | 3409 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 57,566 psi | 90% | 3419 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 96% | 56,159 psi | 88% | 3438 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,491 psi | 85% | 3373 fps | 97% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,563 psi | 86% | 3392 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,056 psi | 86% | 3396 fps | 99.8% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,274 psi | 87% | 3406 fps | 96% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 56,681 psi | 89% | 3376 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 54,882 psi | 86% | 3451 fps | 99.2% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,941 psi | 88% | 3366 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 56,594 psi | 89% | 3412 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 57,145 psi | 90% | 3445 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,085 psi | 86% | 3307 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,317 psi | 87% | 3297 fps | 100% |
| Somchem S321 | <<locked>> | 84% | 55,506 psi | 87% | 3406 fps | 99.9% |
| Somchem S335 | <<locked>> | 88% | 54,505 psi | 85% | 3301 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 56,130 psi | 88% | 3406 fps | 99.3% |
| Somchem S355 | <<locked>> | 96% | 56,637 psi | 89% | 3442 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,732 psi | 75% | 3373 fps | 99.6% |
| Vihtavuori N130 | <<locked>> | 84% | 54,882 psi | 86% | 3278 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,288 psi | 87% | 3294 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 57,130 psi | 90% | 3389 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,737 psi | 86% | 3343 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,665 psi | 86% | 3360 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 56,144 psi | 88% | 3442 fps | 98.4% |
| Vihtavuori N530 | <<locked>> | 86% | 54,259 psi | 85% | 3366 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 92% | 56,492 psi | 89% | 3389 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 55,245 psi | 87% | 3442 fps | 98.1% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 57,276 psi | 90% | 3422 fps | 99.8% |
| Winchester 748 | <<locked>> | 86% | 54,331 psi | 85% | 3419 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 90% | 57,174 psi | 90% | 3455 fps | 99.7% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 45,730 psi | 72% | 3159 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,053 psi | 78% | 3274 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 37,913 psi | 59% | 3035 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,411 psi | 71% | 3219 fps | 99.6% |
| Accurate 4064 | <<locked>> | 80% | 35,882 psi | 56% | 3009 fps | 98.8% |
| Accurate 4350 | <<locked>> | 94% | 43,250 psi | 68% | 3232 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 42,163 psi | 66% | 3156 fps | 96.7% |
| ADI AR 2208 | <<locked>> | 84% | 40,698 psi | 64% | 3097 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,295 psi | 69% | 3179 fps | 98.4% |
| Alliant AR-Comp | <<locked>> | 80% | 43,932 psi | 69% | 3186 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,750 psi | 81% | 3425 fps | 99.1% |
| Alliant Power Pro 2000-MR | 35.7 gr | 82% | 41,191 psi | 65% | 3232 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 42,670 psi | 67% | 3173 fps | 97.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,244 psi | 55% | 2989 fps | 95.5% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,721 psi | 81% | 3287 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 40,509 psi | 63% | 3130 fps | 95.6% |
| Alliant Reloder-16 | <<locked>> | 94% | 42,873 psi | 67% | 3245 fps | 95.8% |
| Alliant Reloder-17 | 36.9 gr | 86% | 37,565 psi | 59% | 3136 fps | 95.7% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 53,853 psi | 84% | 3248 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,582 psi | 65% | 3146 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 34,722 psi | 54% | 2986 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,122 psi | 72% | 3176 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,917 psi | 67% | 3186 fps | 98.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,805 psi | 75% | 3360 fps | 97.6% |
| Hodgdon H322 | <<locked>> | 80% | 50,937 psi | 80% | 3320 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,750 psi | 81% | 3333 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 43,874 psi | 69% | 3192 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 98% | 53,664 psi | 84% | 3438 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 42,540 psi | 67% | 3173 fps | 97.4% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 36,912 psi | 58% | 3048 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,696 psi | 61% | 3123 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,730 psi | 40% | 1939 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,944 psi | 64% | 3114 fps | 96.9% |
| IMR 3031 | <<locked>> | 80% | 41,887 psi | 66% | 3182 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 40,001 psi | 63% | 3074 fps | 95.6% |
| IMR 4166 Enduron | <<locked>> | 88% | 52,156 psi | 82% | 3301 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 51,692 psi | 81% | 3248 fps | 100% |
| IMR 4831 | <<locked>> | 94% | 41,698 psi | 65% | 3176 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 38,812 psi | 61% | 3104 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 80% | 44,295 psi | 69% | 3179 fps | 98.4% |
| Lovex D073.5 | <<locked>> | 80% | 50,212 psi | 79% | 3284 fps | 99.7% |
| Lovex D073.6 | <<locked>> | 80% | 41,017 psi | 64% | 3130 fps | 99% |
| Lovex S060 | <<locked>> | 80% | 42,395 psi | 66% | 3094 fps | 96.9% |
| Lovex S062 | <<locked>> | 80% | 37,231 psi | 58% | 3015 fps | 96.7% |
| Lovex S065 | <<locked>> | 94% | 47,964 psi | 75% | 3245 fps | 95.5% |
| Lovex S070 | <<locked>> | 98% | 51,822 psi | 81% | 3340 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 41,147 psi | 64% | 3104 fps | 97.8% |
| Norma 202 | <<locked>> | 80% | 41,582 psi | 65% | 3123 fps | 99.5% |
| Norma 203B | <<locked>> | 80% | 37,260 psi | 58% | 3048 fps | 95.2% |
| Norma URP | <<locked>> | 94% | 43,366 psi | 68% | 3232 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 82% | 39,697 psi | 62% | 3127 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 98% | 49,023 psi | 77% | 3353 fps | 95.3% |
| Ramshot TAC | <<locked>> | 82% | 47,413 psi | 74% | 3232 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,642 psi | 68% | 3189 fps | 97.1% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,080 psi | 75% | 3232 fps | 98% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,918 psi | 41% | 1982 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,647 psi | 78% | 3284 fps | 99.8% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 51,155 psi | 80% | 3314 fps | 95.5% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,755 psi | 62% | 3179 fps | 95.2% |
| ReloadSwiss RS 60 | 34.3 gr | 80% | 32,416 psi | 51% | 2995 fps | 96% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 43,497 psi | 68% | 3255 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 47,007 psi | 74% | 3343 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 44,933 psi | 70% | 3176 fps | 99.7% |
| Rottweil R 902 | <<locked>> | 80% | 38,957 psi | 61% | 3041 fps | 97.2% |
| Rottweil R 903 | <<locked>> | 82% | 34,882 psi | 55% | 2982 fps | 95.1% |
| Shooters World Long Rifle | <<locked>> | 94% | 47,964 psi | 75% | 3245 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,017 psi | 64% | 3130 fps | 99% |
| Shooters World Precision | <<locked>> | 80% | 37,231 psi | 58% | 3015 fps | 96.7% |
| Shooters World SW4350 | <<locked>> | 98% | 51,822 psi | 81% | 3340 fps | 95.2% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,692 psi | 83% | 3307 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 38,885 psi | 61% | 3110 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,344 psi | 82% | 3310 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 45,774 psi | 72% | 3205 fps | 95.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,915 psi | 64% | 3117 fps | 96.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,583 psi | 67% | 3071 fps | 99.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,201 psi | 55% | 2900 fps | 99.1% |
| Somchem S321 | <<locked>> | 80% | 48,109 psi | 75% | 3268 fps | 99.2% |
| Somchem S335 | <<locked>> | 80% | 42,293 psi | 66% | 3074 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 42,337 psi | 66% | 3133 fps | 96.7% |
| Somchem S355 | <<locked>> | 82% | 35,766 psi | 56% | 2995 fps | 95.2% |
| Somchem S365 | <<locked>> | 90% | 33,707 psi | 53% | 3025 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 48,225 psi | 76% | 3166 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,888 psi | 67% | 3077 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,261 psi | 60% | 3041 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,117 psi | 61% | 3041 fps | 99.4% |
| Vihtavuori N150 | <<locked>> | 80% | 31,662 psi | 50% | 2854 fps | 95.2% |
| Vihtavuori N160 | <<locked>> | 92% | 42,554 psi | 67% | 3173 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 44,512 psi | 70% | 3176 fps | 98.5% |
| Vihtavuori N540 | <<locked>> | 80% | 37,826 psi | 59% | 3022 fps | 98.8% |
| Vihtavuori N550 | <<locked>> | 94% | 45,034 psi | 71% | 3238 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 34,969 psi | 55% | 2946 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 43,787 psi | 69% | 3219 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,306 psi | 63% | 3117 fps | 96.9% |
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 109 powders for 5.6 x 57 loaded with the .224 | 62gr | Barnes TAC-X. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,583 fps; across all powders the maximum-charge window runs from 2,165 fps to 3,583 fps. Accurate 3100 gives the best case fill at 100 %, and 109 of the 109 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 62.0 gr projectile in 0.224" calls for a 1:9.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, 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, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for 5.6 x 57 with the .224 | 62gr | Barnes TAC-X they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, Alliant Reloder-26, Hodgdon H4350 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.