Load Specifications
Load data in caliber 6 mm Creedmoor with .243 | 80gr | Sierra VarmintKing bullet and 94 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.
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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% | 55,709 psi | 90% | 3166 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,288 psi | 88% | 3189 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 54,476 psi | 88% | 3189 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 52,736 psi | 85% | 3199 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 54,172 psi | 87% | 3232 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 54,027 psi | 87% | 3297 fps | 98.6% |
| ADI AR 2206H | <<locked>> | 88% | 54,824 psi | 88% | 3261 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 92% | 52,678 psi | 85% | 3202 fps | 98.7% |
| ADI Benchmark 8208 | <<locked>> | 86% | 54,186 psi | 87% | 3215 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 86% | 54,331 psi | 88% | 3199 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,608 psi | 90% | 3333 fps | 99.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,752 psi | 88% | 3383 fps | 99.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,927 psi | 90% | 3284 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,405 psi | 89% | 3179 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 52,997 psi | 85% | 3245 fps | 98.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,808 psi | 84% | 3297 fps | 98.5% |
| Alliant Reloder-17 | <<locked>> | 96% | 53,171 psi | 86% | 3346 fps | 99.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,970 psi | 60% | 2976 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 55,085 psi | 89% | 3274 fps | 98.8% |
| Bofors RP3 | <<locked>> | 92% | 52,794 psi | 85% | 3238 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,912 psi | 90% | 3202 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 53,301 psi | 86% | 3241 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,187 psi | 89% | 3346 fps | 99.2% |
| Hodgdon H322 | <<locked>> | 82% | 54,650 psi | 88% | 3219 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,898 psi | 90% | 3241 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 54,288 psi | 88% | 3251 fps | 98.2% |
| Hodgdon H414 | <<locked>> | 98% | 53,330 psi | 86% | 3284 fps | 95.9% |
| Hodgdon H4895 | <<locked>> | 88% | 55,405 psi | 89% | 3274 fps | 99.7% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 48,254 psi | 78% | 3166 fps | 99% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,984 psi | 89% | 3307 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,230 psi | 57% | 2034 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 53,359 psi | 86% | 3222 fps | 99.5% |
| IMR 3031 | <<locked>> | 88% | 55,042 psi | 89% | 3268 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,506 psi | 90% | 3241 fps | 99.2% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,782 psi | 90% | 3215 fps | 96.3% |
| IMR 4198 | <<locked>> | 82% | 55,245 psi | 89% | 3136 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,230 psi | 89% | 3232 fps | 96.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,995 psi | 82% | 3225 fps | 98.2% |
| IMR 4895 | <<locked>> | 90% | 54,346 psi | 88% | 3284 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 86% | 54,186 psi | 87% | 3215 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 82% | 54,143 psi | 87% | 3196 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,578 psi | 88% | 3238 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,766 psi | 88% | 3189 fps | 99.4% |
| Lovex S062 | <<locked>> | 92% | 55,259 psi | 89% | 3241 fps | 99.9% |
| Lovex S065 | <<locked>> | 98% | 54,563 psi | 88% | 3225 fps | 97.5% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,332 psi | 89% | 3258 fps | 96.5% |
| Norma 201 | <<locked>> | 88% | 53,766 psi | 87% | 3209 fps | 99.8% |
| Norma 202 | <<locked>> | 88% | 54,186 psi | 87% | 3212 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,738 psi | 90% | 3294 fps | 99.5% |
| Norma URPᴾ | <<locked>> | 100% | 53,026 psi | 86% | 3284 fps | 98.4% |
| Ramshot Big Game | <<locked>> | 90% | 52,779 psi | 85% | 3255 fps | 99.1% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 52,054 psi | 84% | 3268 fps | 96.6% |
| Ramshot TAC | <<locked>> | 86% | 54,549 psi | 88% | 3219 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 86% | 53,838 psi | 87% | 3241 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 84% | 55,259 psi | 89% | 3215 fps | 99.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,360 psi | 57% | 2077 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 53,417 psi | 86% | 3196 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,534 psi | 88% | 3225 fps | 96.7% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 53,200 psi | 86% | 3314 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 53,011 psi | 86% | 3356 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 53,809 psi | 87% | 3317 fps | 98.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,722 psi | 87% | 3340 fps | 97.9% |
| Rottweil R 901 | <<locked>> | 86% | 54,737 psi | 88% | 3199 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,215 psi | 87% | 3205 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 94% | 52,663 psi | 85% | 3228 fps | 99.6% |
| Shooters World Long Rifle | <<locked>> | 98% | 54,563 psi | 88% | 3225 fps | 97.5% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,578 psi | 88% | 3238 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,259 psi | 89% | 3241 fps | 99.9% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,332 psi | 89% | 3258 fps | 96.5% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 54,592 psi | 88% | 3294 fps | 99.4% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 52,765 psi | 85% | 3192 fps | 97.8% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 53,505 psi | 86% | 3228 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,230 psi | 89% | 3150 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,419 psi | 89% | 3143 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 55,085 psi | 89% | 3169 fps | 96.1% |
| Somchem S321 | <<locked>> | 84% | 55,477 psi | 89% | 3251 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 54,708 psi | 88% | 3146 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 52,272 psi | 84% | 3186 fps | 99.1% |
| Somchem S355 | <<locked>> | 94% | 53,345 psi | 86% | 3232 fps | 99.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,311 psi | 76% | 3222 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 84% | 55,143 psi | 89% | 3120 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,347 psi | 89% | 3133 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 53,780 psi | 87% | 3176 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,839 psi | 88% | 3189 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,839 psi | 88% | 3212 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,883 psi | 90% | 3287 fps | 98.7% |
| Vihtavuori N530 | <<locked>> | 86% | 54,694 psi | 88% | 3215 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 90% | 53,185 psi | 86% | 3182 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,752 psi | 88% | 3284 fps | 98.4% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,958 psi | 64% | 3064 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 53,098 psi | 86% | 3205 fps | 99.7% |
| Winchester 748 | <<locked>> | 86% | 54,244 psi | 87% | 3264 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 53,722 psi | 87% | 3294 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 88% | 53,185 psi | 86% | 3235 fps | 99.6% |
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% | 46,224 psi | 75% | 3012 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,792 psi | 82% | 3133 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,015 psi | 63% | 2913 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,687 psi | 74% | 3074 fps | 99.8% |
| Accurate 4064 | <<locked>> | 80% | 36,869 psi | 59% | 2894 fps | 99.3% |
| Accurate 4350 | <<locked>> | 92% | 40,683 psi | 66% | 3035 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 42,525 psi | 69% | 3015 fps | 97.4% |
| ADI AR 2208 | <<locked>> | 82% | 38,711 psi | 62% | 2907 fps | 95.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,541 psi | 72% | 3035 fps | 98.8% |
| Alliant AR-Comp | <<locked>> | 80% | 44,527 psi | 72% | 3041 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,953 psi | 84% | 3271 fps | 99.4% |
| Alliant Power Pro 2000-MR | 38.2 gr | 82% | 41,249 psi | 67% | 3091 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,752 psi | 58% | 2867 fps | 96.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,793 psi | 84% | 3120 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,276 psi | 62% | 2933 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 92% | 40,364 psi | 65% | 3041 fps | 95.5% |
| Alliant Reloder-17 | 38.6 gr | 84% | 35,331 psi | 57% | 2936 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 98% | 34,882 psi | 56% | 2917 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,800 psi | 67% | 3012 fps | 96% |
| Bofors RP3 | <<locked>> | 80% | 35,201 psi | 57% | 2864 fps | 96.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,470 psi | 75% | 3031 fps | 99.4% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,366 psi | 70% | 3051 fps | 99.1% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,776 psi | 77% | 3209 fps | 98.1% |
| Hodgdon H322 | <<locked>> | 80% | 51,053 psi | 82% | 3159 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,967 psi | 84% | 3179 fps | 100% |
| Hodgdon H380 | <<locked>> | 84% | 41,437 psi | 67% | 2995 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 96% | 49,806 psi | 80% | 3219 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 42,873 psi | 69% | 3031 fps | 98% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 34,780 psi | 56% | 2861 fps | 95.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,928 psi | 63% | 2989 fps | 97.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,063 psi | 42% | 1821 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,220 psi | 66% | 2979 fps | 97.5% |
| IMR 3031 | <<locked>> | 80% | 42,163 psi | 68% | 3038 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,000 psi | 61% | 2884 fps | 95.6% |
| IMR 4166 Enduron | <<locked>> | 88% | 52,344 psi | 84% | 3153 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 52,025 psi | 84% | 3087 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 52,127 psi | 84% | 3176 fps | 95.4% |
| IMR 4831 | <<locked>> | 92% | 39,030 psi | 63% | 2976 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 39,204 psi | 63% | 2969 fps | 96.5% |
| IMR 8208 XBR | <<locked>> | 80% | 44,541 psi | 72% | 3035 fps | 98.8% |
| Lovex D073.5 | <<locked>> | 80% | 50,647 psi | 82% | 3136 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 41,524 psi | 67% | 2995 fps | 99.4% |
| Lovex S060 | <<locked>> | 80% | 42,902 psi | 69% | 2956 fps | 97.5% |
| Lovex S062 | <<locked>> | 80% | 37,927 psi | 61% | 2894 fps | 97.5% |
| Lovex S065 | <<locked>> | 92% | 45,237 psi | 73% | 3048 fps | 95.3% |
| Lovex S070 | <<locked>> | 96% | 48,863 psi | 79% | 3136 fps | 95% |
| Norma 201 | <<locked>> | 80% | 41,858 psi | 68% | 2972 fps | 98.4% |
| Norma 202 | <<locked>> | 80% | 42,090 psi | 68% | 2989 fps | 99.8% |
| Norma 203B | <<locked>> | 80% | 37,666 psi | 61% | 2920 fps | 96% |
| Norma URP | <<locked>> | 92% | 40,596 psi | 65% | 3028 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 37,231 psi | 60% | 2927 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 98% | 48,718 psi | 79% | 3202 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 44,773 psi | 72% | 3031 fps | 95.4% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,947 psi | 71% | 3051 fps | 97.7% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,385 psi | 78% | 3091 fps | 98.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,252 psi | 42% | 1860 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,053 psi | 81% | 3136 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 47,906 psi | 77% | 3100 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 40,089 psi | 65% | 3045 fps | 96.1% |
| ReloadSwiss RS 60 | 36.7 gr | 80% | 32,735 psi | 53% | 2877 fps | 97% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 40,451 psi | 65% | 3051 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 43,656 psi | 70% | 3127 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 45,672 psi | 74% | 3035 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 39,769 psi | 64% | 2917 fps | 97.9% |
| Rottweil R 903 | <<locked>> | 80% | 32,938 psi | 53% | 2795 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 92% | 45,237 psi | 73% | 3048 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,524 psi | 67% | 2995 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 37,927 psi | 61% | 2894 fps | 97.5% |
| Shooters World SW4350 | <<locked>> | 96% | 48,863 psi | 79% | 3136 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 36,564 psi | 59% | 2917 fps | 95.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,931 psi | 69% | 2995 fps | 95.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,249 psi | 67% | 2982 fps | 97.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,033 psi | 69% | 2933 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,665 psi | 58% | 2772 fps | 99.5% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 51,401 psi | 83% | 3107 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 48,356 psi | 78% | 3123 fps | 99.5% |
| Somchem S335 | <<locked>> | 80% | 42,844 psi | 69% | 2936 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,583 psi | 69% | 2995 fps | 97.3% |
| Somchem S355 | <<locked>> | 80% | 34,098 psi | 55% | 2812 fps | 95.3% |
| Somchem S365 | <<locked>> | 88% | 31,865 psi | 51% | 2841 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 48,631 psi | 78% | 3015 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,294 psi | 70% | 2933 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,856 psi | 63% | 2907 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,537 psi | 64% | 2910 fps | 99.7% |
| Vihtavuori N150 | <<locked>> | 80% | 32,227 psi | 52% | 2740 fps | 96.2% |
| Vihtavuori N160 | <<locked>> | 90% | 39,943 psi | 64% | 2976 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 44,672 psi | 72% | 3031 fps | 98.9% |
| Vihtavuori N540 | <<locked>> | 80% | 38,290 psi | 62% | 2894 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 92% | 42,206 psi | 68% | 3041 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 98% | 37,565 psi | 61% | 3005 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 35,273 psi | 57% | 2828 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 44,280 psi | 71% | 3077 fps | 99.4% |
| Winchester 760 | <<locked>> | 96% | 50,183 psi | 81% | 3228 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,437 psi | 65% | 2979 fps | 97.5% |
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 94 powders for 6 mm Creedmoor loaded with the .243 | 80gr | Sierra VarmintKing. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,383 fps; across all powders the maximum-charge window runs from 2,034 fps to 3,383 fps. Accurate 4350 gives the best case fill at 100 %, and 94 of the 94 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (427 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 80.0 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for 6 mm Creedmoor with the .243 | 80gr | Sierra VarmintKing they combine a high case fill with complete burn and sit in the upper velocity band. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.