Load Specifications
Load data in caliber 6 mm XC with .243 | 76gr | Norma Tipstrike 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, 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.
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% | 57,145 psi | 90% | 3301 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 55,767 psi | 87% | 3323 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 55,361 psi | 87% | 3314 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 54,012 psi | 85% | 3330 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 55,274 psi | 87% | 3360 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 51,053 psi | 80% | 3353 fps | 97.4% |
| Accurate LT-30 | <<locked>> | 82% | 56,028 psi | 88% | 3238 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 56,449 psi | 88% | 3268 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 56,376 psi | 88% | 3396 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 96% | 57,334 psi | 90% | 3386 fps | 98.9% |
| ADI AR 2219 | <<locked>> | 82% | 57,334 psi | 90% | 3373 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 88% | 55,434 psi | 87% | 3346 fps | 99.7% |
| Alliant AR-Comp | <<locked>> | 88% | 55,506 psi | 87% | 3333 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 56,913 psi | 89% | 3468 fps | 99.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,912 psi | 88% | 3514 fps | 98.7% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 57,058 psi | 89% | 3412 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 56,782 psi | 89% | 3412 fps | 99.7% |
| Alliant Reloder-10x | <<locked>> | 84% | 56,579 psi | 89% | 3310 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 54,302 psi | 85% | 3376 fps | 98.6% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 49,893 psi | 78% | 3360 fps | 97.4% |
| Alliant Reloder-17 | <<locked>> | 98% | 54,099 psi | 85% | 3474 fps | 99.4% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,506 psi | 87% | 3225 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 56,275 psi | 88% | 3406 fps | 98.5% |
| Bofors RP3 | <<locked>> | 96% | 57,740 psi | 90% | 3432 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 88% | 57,319 psi | 90% | 3330 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 88% | 54,505 psi | 85% | 3369 fps | 99.8% |
| Hodgdon CFE223 | <<locked>> | 86% | 56,362 psi | 88% | 3481 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 84% | 56,086 psi | 88% | 3353 fps | 100% |
| Hodgdon H335 | <<locked>> | 84% | 57,464 psi | 90% | 3383 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 55,477 psi | 87% | 3379 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 90% | 56,884 psi | 89% | 3409 fps | 99.5% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 45,992 psi | 72% | 3222 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 56,057 psi | 88% | 3442 fps | 99.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,896 psi | 55% | 2093 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 54,897 psi | 86% | 3353 fps | 99.3% |
| IMR 3031 | <<locked>> | 90% | 56,144 psi | 88% | 3399 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 56,637 psi | 89% | 3366 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 92% | 57,435 psi | 90% | 3346 fps | 95.8% |
| IMR 4198 | <<locked>> | 84% | 56,724 psi | 89% | 3268 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,399 psi | 76% | 3281 fps | 97% |
| IMR 4895 | <<locked>> | 92% | 55,666 psi | 87% | 3415 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 88% | 55,434 psi | 87% | 3346 fps | 99.7% |
| Lovex D073.5 | <<locked>> | 84% | 55,579 psi | 87% | 3330 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 90% | 55,883 psi | 88% | 3373 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 56,115 psi | 88% | 3314 fps | 99.2% |
| Lovex S062 | <<locked>> | 94% | 56,275 psi | 88% | 3366 fps | 99.8% |
| Lovex S065ᴾ | <<locked>> | 100% | 55,376 psi | 87% | 3343 fps | 96.9% |
| Norma 201 | <<locked>> | 90% | 54,897 psi | 86% | 3333 fps | 99.7% |
| Norma 202 | <<locked>> | 90% | 55,288 psi | 87% | 3343 fps | 100% |
| Norma 203B | <<locked>> | 94% | 57,043 psi | 89% | 3425 fps | 99.3% |
| Norma URPᴾ | <<locked>> | 100% | 50,343 psi | 79% | 3340 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 92% | 53,795 psi | 84% | 3383 fps | 98.8% |
| Ramshot TAC | <<locked>> | 88% | 55,883 psi | 88% | 3346 fps | 97.2% |
| Ramshot Wild Boar | <<locked>> | 88% | 55,506 psi | 87% | 3379 fps | 99.1% |
| Ramshot X-Terminator | <<locked>> | 86% | 56,797 psi | 89% | 3346 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,288 psi | 55% | 2142 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 55,100 psi | 86% | 3333 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 55,738 psi | 87% | 3350 fps | 96.2% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 54,360 psi | 85% | 3448 fps | 98.6% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 57,740 psi | 90% | 3553 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 50,676 psi | 79% | 3369 fps | 97.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 51,416 psi | 81% | 3396 fps | 96.5% |
| Rottweil R 901 | <<locked>> | 88% | 56,072 psi | 88% | 3330 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 55,390 psi | 87% | 3330 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 98% | 57,566 psi | 90% | 3422 fps | 99.6% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 55,376 psi | 87% | 3343 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 90% | 55,883 psi | 88% | 3373 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 56,275 psi | 88% | 3366 fps | 99.8% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 54,650 psi | 86% | 3291 fps | 99.5% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 57,682 psi | 90% | 3383 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 55,622 psi | 87% | 3422 fps | 99.1% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 57,624 psi | 90% | 3337 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 54,099 psi | 85% | 3320 fps | 97.3% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 54,853 psi | 86% | 3356 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 56,753 psi | 89% | 3281 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 56,710 psi | 89% | 3271 fps | 100% |
| Somchem S321 | <<locked>> | 86% | 56,855 psi | 89% | 3383 fps | 99.9% |
| Somchem S335 | <<locked>> | 90% | 55,956 psi | 88% | 3274 fps | 100% |
| Somchem S341 | <<locked>> | 90% | 57,450 psi | 90% | 3383 fps | 99.2% |
| Somchem S355 | <<locked>> | 96% | 54,172 psi | 85% | 3353 fps | 99.2% |
| Somchem S365ᴾ | <<locked>> | 100% | 45,165 psi | 71% | 3281 fps | 99.1% |
| Vihtavuori N130 | <<locked>> | 86% | 56,739 psi | 89% | 3251 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 56,768 psi | 89% | 3268 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 54,868 psi | 86% | 3307 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,883 psi | 88% | 3317 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 56,086 psi | 88% | 3340 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 53,113 psi | 83% | 3346 fps | 97.6% |
| Vihtavuori N530 | <<locked>> | 88% | 55,956 psi | 88% | 3343 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 92% | 54,447 psi | 85% | 3314 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 52,344 psi | 82% | 3350 fps | 97.3% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 54,360 psi | 85% | 3333 fps | 99.4% |
| Winchester 748 | <<locked>> | 88% | 55,550 psi | 87% | 3399 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 90% | 54,404 psi | 85% | 3363 fps | 99.3% |
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% | 44,396 psi | 70% | 3081 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 48,559 psi | 76% | 3196 fps | 99.9% |
| Accurate 2495 | <<locked>> | 80% | 37,130 psi | 58% | 2969 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 43,845 psi | 69% | 3136 fps | 99.4% |
| Accurate 4064 | <<locked>> | 80% | 35,099 psi | 55% | 2940 fps | 98.5% |
| Accurate 4350 | <<locked>> | 96% | 44,135 psi | 69% | 3212 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 52,866 psi | 83% | 3186 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 53,258 psi | 83% | 3212 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 41,046 psi | 64% | 3077 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 86% | 42,061 psi | 66% | 3081 fps | 95.8% |
| ADI AR 2219 | <<locked>> | 80% | 53,592 psi | 84% | 3314 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,076 psi | 68% | 3100 fps | 98% |
| Alliant AR-Comp | <<locked>> | 80% | 42,453 psi | 67% | 3110 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 50,111 psi | 79% | 3340 fps | 98.8% |
| Alliant Power Pro 2000-MR | 39.6 gr | 84% | 42,641 psi | 67% | 3222 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,539 psi | 65% | 3094 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 36,550 psi | 57% | 2982 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,256 psi | 79% | 3205 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 39,146 psi | 61% | 3048 fps | 95% |
| Alliant Reloder-16 | <<locked>> | 96% | 43,801 psi | 69% | 3222 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 88% | 38,624 psi | 61% | 3117 fps | 95.8% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 52,243 psi | 82% | 3173 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 42,873 psi | 67% | 3133 fps | 95.5% |
| Bofors RP3 | <<locked>> | 82% | 35,810 psi | 56% | 2972 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,831 psi | 70% | 3097 fps | 98.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 41,611 psi | 65% | 3110 fps | 98.2% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,745 psi | 72% | 3271 fps | 96.9% |
| Hodgdon H322 | <<locked>> | 80% | 49,008 psi | 77% | 3232 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 50,111 psi | 79% | 3255 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 45,136 psi | 71% | 3176 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 41,408 psi | 65% | 3094 fps | 96.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 37,797 psi | 59% | 3031 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,072 psi | 58% | 3035 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,860 psi | 41% | 1870 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,523 psi | 62% | 3028 fps | 96.3% |
| IMR 3031 | <<locked>> | 80% | 40,553 psi | 64% | 3107 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 38,957 psi | 61% | 2999 fps | 95% |
| IMR 4166 Enduron | <<locked>> | 90% | 53,896 psi | 84% | 3281 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 50,357 psi | 79% | 3166 fps | 100% |
| IMR 4831 | <<locked>> | 96% | 42,554 psi | 67% | 3156 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 37,739 psi | 59% | 3025 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 80% | 43,076 psi | 68% | 3100 fps | 98% |
| Lovex D073.5 | <<locked>> | 80% | 48,356 psi | 76% | 3199 fps | 99.5% |
| Lovex D073.6 | <<locked>> | 80% | 39,523 psi | 62% | 3051 fps | 98.6% |
| Lovex S060 | <<locked>> | 80% | 41,350 psi | 65% | 3015 fps | 96.4% |
| Lovex S062 | <<locked>> | 80% | 36,318 psi | 57% | 2943 fps | 96.3% |
| Lovex S065 | <<locked>> | 96% | 49,052 psi | 77% | 3222 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 40,132 psi | 63% | 3028 fps | 97.4% |
| Norma 202 | <<locked>> | 80% | 40,292 psi | 63% | 3048 fps | 99.2% |
| Norma 203B | <<locked>> | 82% | 38,479 psi | 60% | 3035 fps | 95.4% |
| Norma URP | <<locked>> | 96% | 44,309 psi | 69% | 3212 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 82% | 38,130 psi | 60% | 3045 fps | 95% |
| Ramshot TAC | <<locked>> | 84% | 48,994 psi | 77% | 3215 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,279 psi | 66% | 3110 fps | 96.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 46,441 psi | 73% | 3150 fps | 97.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,020 psi | 41% | 1913 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 48,414 psi | 76% | 3209 fps | 99.7% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 52,301 psi | 82% | 3287 fps | 95.4% |
| ReloadSwiss RS 52 | 37.4 gr | 82% | 40,814 psi | 64% | 3163 fps | 95.4% |
| ReloadSwiss RS 60 | 37.1 gr | 80% | 31,473 psi | 49% | 2917 fps | 95.2% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 44,208 psi | 69% | 3235 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 47,819 psi | 75% | 3317 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 43,961 psi | 69% | 3097 fps | 99.5% |
| Rottweil R 902 | <<locked>> | 80% | 38,174 psi | 60% | 2969 fps | 96.8% |
| Rottweil R 903 | <<locked>> | 84% | 35,969 psi | 56% | 2969 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 96% | 49,052 psi | 77% | 3222 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 39,523 psi | 62% | 3051 fps | 98.6% |
| Shooters World Precision | <<locked>> | 80% | 36,318 psi | 57% | 2943 fps | 96.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 51,155 psi | 80% | 3228 fps | 99.1% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 54,128 psi | 85% | 3323 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 40,016 psi | 63% | 3097 fps | 95.8% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 50,662 psi | 79% | 3222 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 47,079 psi | 74% | 3182 fps | 95.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,450 psi | 62% | 3035 fps | 95.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,495 psi | 65% | 2995 fps | 99.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,243 psi | 54% | 2828 fps | 98.8% |
| Somchem S321 | <<locked>> | 80% | 46,572 psi | 73% | 3192 fps | 98.9% |
| Somchem S335 | <<locked>> | 80% | 41,234 psi | 65% | 2999 fps | 99.7% |
| Somchem S341 | <<locked>> | 80% | 40,915 psi | 64% | 3054 fps | 96.1% |
| Somchem S355 | <<locked>> | 84% | 36,999 psi | 58% | 2982 fps | 95.5% |
| Somchem S365 | <<locked>> | 90% | 32,503 psi | 51% | 2946 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 46,934 psi | 74% | 3091 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,669 psi | 65% | 2999 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,130 psi | 58% | 2966 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 80% | 38,145 psi | 60% | 2972 fps | 99.1% |
| Vihtavuori N150 | <<locked>> | 82% | 33,156 psi | 52% | 2851 fps | 95.7% |
| Vihtavuori N160 | <<locked>> | 94% | 43,671 psi | 68% | 3156 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 42,844 psi | 67% | 3087 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 80% | 36,622 psi | 57% | 2943 fps | 98.4% |
| Vihtavuori N550 | <<locked>> | 96% | 45,861 psi | 72% | 3219 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 36,274 psi | 57% | 2940 fps | 95.2% |
| Winchester 748 | <<locked>> | 80% | 42,206 psi | 66% | 3136 fps | 98.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,856 psi | 61% | 3035 fps | 96.2% |
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 110 powders for 6 mm XC loaded with the .243 | 76gr | Norma Tipstrike. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,553 fps; across all powders the maximum-charge window runs from 2,093 fps to 3,553 fps. Accurate 4350 gives the best case fill at 100 %, and 110 of the 110 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 76.0 gr projectile in 0.243" calls for a 1:10.0 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, Alliant Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for 6 mm XC with the .243 | 76gr | Norma Tipstrike 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.