Load Specifications
Load data in caliber 6 mm Creedmoor with .243 | 80gr | Osprey Virtus bullet and 94 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 Reloder-17 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.
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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% | 54,491 psi | 88% | 3156 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 52,924 psi | 85% | 3173 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 52,243 psi | 84% | 3163 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,071 psi | 89% | 3241 fps | 100% |
| Accurate 4064 | <<locked>> | 94% | 55,782 psi | 90% | 3261 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,170 psi | 84% | 3271 fps | 98.3% |
| ADI AR 2206H | <<locked>> | 88% | 53,809 psi | 87% | 3248 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 94% | 54,897 psi | 89% | 3241 fps | 99% |
| ADI Benchmark 8208 | <<locked>> | 86% | 52,852 psi | 85% | 3199 fps | 99.8% |
| Alliant AR-Comp | <<locked>> | 86% | 53,156 psi | 86% | 3186 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 54,491 psi | 88% | 3320 fps | 99.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 53,374 psi | 86% | 3363 fps | 98.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 54,360 psi | 88% | 3264 fps | 99.8% |
| Alliant Reloder-10x | <<locked>> | 82% | 53,867 psi | 87% | 3163 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 55,085 psi | 89% | 3287 fps | 99.2% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,836 psi | 82% | 3281 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 98% | 55,883 psi | 90% | 3399 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 53,693 psi | 87% | 3255 fps | 98.6% |
| Bofors RP3 | <<locked>> | 94% | 55,230 psi | 89% | 3284 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 86% | 54,621 psi | 88% | 3186 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 55,796 psi | 90% | 3284 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,128 psi | 87% | 3333 fps | 99.1% |
| Hodgdon H322 | <<locked>> | 82% | 53,287 psi | 86% | 3202 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,491 psi | 88% | 3225 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 52,707 psi | 85% | 3228 fps | 97.9% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 55,985 psi | 90% | 3337 fps | 96.5% |
| Hodgdon H4895 | <<locked>> | 88% | 54,302 psi | 88% | 3261 fps | 99.6% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,833 psi | 76% | 3143 fps | 98.8% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 53,534 psi | 86% | 3291 fps | 99.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,708 psi | 56% | 2028 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 55,622 psi | 90% | 3264 fps | 99.7% |
| IMR 3031 | <<locked>> | 88% | 53,867 psi | 87% | 3251 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,505 psi | 88% | 3228 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,534 psi | 88% | 3196 fps | 96% |
| IMR 4198 | <<locked>> | 82% | 54,433 psi | 88% | 3127 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,302 psi | 88% | 3219 fps | 95.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,414 psi | 80% | 3202 fps | 97.9% |
| IMR 4895 | <<locked>> | 90% | 53,258 psi | 86% | 3268 fps | 99.3% |
| IMR 8208 XBR | <<locked>> | 86% | 52,852 psi | 85% | 3199 fps | 99.8% |
| Lovex D073.5 | <<locked>> | 82% | 52,823 psi | 85% | 3179 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 53,301 psi | 86% | 3222 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 53,476 psi | 86% | 3169 fps | 99.3% |
| Lovex S062 | <<locked>> | 92% | 53,650 psi | 87% | 3219 fps | 99.8% |
| Lovex S065 | <<locked>> | 98% | 53,084 psi | 86% | 3202 fps | 97.2% |
| Lovex S070ᴾ | <<locked>> | 100% | 54,172 psi | 87% | 3241 fps | 96.3% |
| Norma 201 | <<locked>> | 90% | 55,724 psi | 90% | 3245 fps | 99.9% |
| Norma 202 | <<locked>> | 88% | 53,055 psi | 86% | 3202 fps | 100% |
| Norma 203B | <<locked>> | 92% | 54,259 psi | 88% | 3271 fps | 99.4% |
| Norma URPᴾ | <<locked>> | 100% | 51,895 psi | 84% | 3264 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 92% | 55,361 psi | 89% | 3304 fps | 99.4% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,024 psi | 82% | 3255 fps | 96.4% |
| Ramshot TAC | <<locked>> | 86% | 53,577 psi | 86% | 3209 fps | 97.5% |
| Ramshot Wild Boar | <<locked>> | 86% | 52,808 psi | 85% | 3228 fps | 99.2% |
| Ramshot X-Terminator | <<locked>> | 84% | 53,925 psi | 87% | 3196 fps | 99.2% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,085 psi | 57% | 2077 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 56,057 psi | 90% | 3245 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 53,476 psi | 86% | 3212 fps | 96.5% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 55,434 psi | 89% | 3360 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 55,274 psi | 89% | 3399 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 52,141 psi | 84% | 3294 fps | 98.1% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,692 psi | 85% | 3327 fps | 97.7% |
| Rottweil R 901 | <<locked>> | 86% | 52,924 psi | 85% | 3176 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 52,562 psi | 85% | 3179 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 96% | 54,665 psi | 88% | 3264 fps | 99.7% |
| Shooters World Long Rifle | <<locked>> | 98% | 53,084 psi | 86% | 3202 fps | 97.2% |
| Shooters World Match Rifle | <<locked>> | 88% | 53,301 psi | 86% | 3222 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 53,650 psi | 87% | 3219 fps | 99.8% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 54,172 psi | 87% | 3241 fps | 96.3% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,608 psi | 90% | 3205 fps | 99.8% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 53,563 psi | 86% | 3281 fps | 99.3% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 54,984 psi | 89% | 3189 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,303 psi | 89% | 3241 fps | 98.2% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 55,666 psi | 90% | 3268 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,244 psi | 87% | 3140 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,447 psi | 88% | 3133 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,012 psi | 87% | 3156 fps | 95.9% |
| Somchem S321 | <<locked>> | 84% | 53,969 psi | 87% | 3232 fps | 99.9% |
| Somchem S335 | <<locked>> | 88% | 53,229 psi | 86% | 3130 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 54,795 psi | 88% | 3235 fps | 99.4% |
| Somchem S355 | <<locked>> | 96% | 55,390 psi | 89% | 3271 fps | 99.7% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,137 psi | 74% | 3202 fps | 99.6% |
| Vihtavuori N130 | <<locked>> | 84% | 53,722 psi | 87% | 3104 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,404 psi | 88% | 3127 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 55,521 psi | 90% | 3209 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 53,403 psi | 86% | 3173 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 53,316 psi | 86% | 3192 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 54,346 psi | 88% | 3264 fps | 98.5% |
| Vihtavuori N530 | <<locked>> | 86% | 53,287 psi | 86% | 3199 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 92% | 55,259 psi | 89% | 3219 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 53,592 psi | 86% | 3268 fps | 98.2% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 55,753 psi | 90% | 3255 fps | 99.9% |
| Winchester 748 | <<locked>> | 86% | 53,185 psi | 86% | 3248 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 55,985 psi | 90% | 3337 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 90% | 55,738 psi | 90% | 3281 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% | 44,991 psi | 73% | 2995 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,081 psi | 79% | 3107 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 36,970 psi | 60% | 2877 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,396 psi | 72% | 3054 fps | 99.7% |
| Accurate 4064 | <<locked>> | 80% | 34,998 psi | 56% | 2854 fps | 99% |
| Accurate 4350 | <<locked>> | 92% | 38,986 psi | 63% | 3002 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 41,466 psi | 67% | 2999 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 82% | 37,492 psi | 60% | 2884 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 43,555 psi | 70% | 3018 fps | 98.7% |
| Alliant AR-Comp | <<locked>> | 80% | 43,004 psi | 69% | 3018 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 50,807 psi | 82% | 3251 fps | 99.3% |
| Alliant Power Pro 2000-MR | 38.2 gr | 82% | 40,277 psi | 65% | 3074 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 34,403 psi | 55% | 2841 fps | 95.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 50,676 psi | 82% | 3110 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,188 psi | 60% | 2910 fps | 95.1% |
| Alliant Reloder-16 | <<locked>> | 92% | 39,392 psi | 64% | 3025 fps | 95.1% |
| Alliant Reloder-17 | 39.5 gr | 86% | 36,738 psi | 59% | 2986 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,524 psi | 65% | 2989 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 33,881 psi | 55% | 2835 fps | 95.8% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,556 psi | 73% | 3022 fps | 99.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,163 psi | 68% | 3031 fps | 98.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,369 psi | 75% | 3186 fps | 97.8% |
| Hodgdon H322 | <<locked>> | 80% | 49,690 psi | 80% | 3140 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 50,966 psi | 82% | 3166 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 42,844 psi | 69% | 3031 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 98% | 52,228 psi | 84% | 3271 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 41,800 psi | 67% | 3012 fps | 97.7% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 33,750 psi | 54% | 2838 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 37,579 psi | 61% | 2963 fps | 97.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,817 psi | 42% | 1818 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,277 psi | 65% | 2959 fps | 97.3% |
| IMR 3031 | <<locked>> | 80% | 41,017 psi | 66% | 3022 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 36,970 psi | 60% | 2864 fps | 95.2% |
| IMR 4166 Enduron | <<locked>> | 88% | 51,416 psi | 83% | 3140 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 51,198 psi | 83% | 3077 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 94% | 50,894 psi | 82% | 3156 fps | 95.1% |
| IMR 4831 | <<locked>> | 94% | 40,292 psi | 65% | 3012 fps | 95.6% |
| IMR 4895 | <<locked>> | 80% | 38,087 psi | 61% | 2949 fps | 96.2% |
| IMR 8208 XBR | <<locked>> | 80% | 43,555 psi | 70% | 3018 fps | 98.7% |
| Lovex D073.5 | <<locked>> | 80% | 48,965 psi | 79% | 3114 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 40,263 psi | 65% | 2976 fps | 99.2% |
| Lovex S060 | <<locked>> | 80% | 41,684 psi | 67% | 2936 fps | 97.2% |
| Lovex S062 | <<locked>> | 80% | 36,477 psi | 59% | 2864 fps | 97.1% |
| Lovex S065 | <<locked>> | 92% | 44,106 psi | 71% | 3028 fps | 95% |
| Lovex S070 | <<locked>> | 98% | 50,662 psi | 82% | 3176 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 40,292 psi | 65% | 2946 fps | 98.1% |
| Norma 202 | <<locked>> | 80% | 40,654 psi | 66% | 2966 fps | 99.6% |
| Norma 203B | <<locked>> | 80% | 36,579 psi | 59% | 2900 fps | 95.6% |
| Norma URP | <<locked>> | 92% | 39,479 psi | 64% | 3009 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 36,230 psi | 58% | 2907 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 98% | 47,688 psi | 77% | 3186 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 43,468 psi | 70% | 3009 fps | 95% |
| Ramshot Wild Boar | <<locked>> | 80% | 42,946 psi | 69% | 3035 fps | 97.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,065 psi | 76% | 3068 fps | 98.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,947 psi | 42% | 1857 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,052 psi | 79% | 3123 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 49,690 psi | 80% | 3140 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 38,667 psi | 62% | 3018 fps | 95.6% |
| ReloadSwiss RS 60 | 36.7 gr | 80% | 31,734 psi | 51% | 2851 fps | 96.5% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 42,076 psi | 68% | 3094 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 45,643 psi | 74% | 3176 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 43,918 psi | 71% | 3009 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 80% | 38,276 psi | 62% | 2890 fps | 97.5% |
| Rottweil R 903 | <<locked>> | 82% | 34,055 psi | 55% | 2831 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 92% | 44,106 psi | 71% | 3028 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 40,263 psi | 65% | 2976 fps | 99.2% |
| Shooters World Precision | <<locked>> | 80% | 36,477 psi | 59% | 2864 fps | 97.1% |
| Shooters World SW4350 | <<locked>> | 98% | 50,662 psi | 82% | 3176 fps | 95.5% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 51,967 psi | 84% | 3143 fps | 99.6% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 37,782 psi | 61% | 2953 fps | 95.9% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,677 psi | 83% | 3136 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,466 psi | 67% | 2972 fps | 95% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 39,929 psi | 64% | 2956 fps | 96.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,047 psi | 68% | 2917 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 34,693 psi | 56% | 2756 fps | 99.3% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 50,328 psi | 81% | 3094 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 46,920 psi | 76% | 3104 fps | 99.4% |
| Somchem S335 | <<locked>> | 80% | 41,437 psi | 67% | 2913 fps | 99.9% |
| Somchem S341 | <<locked>> | 80% | 41,249 psi | 67% | 2972 fps | 97% |
| Somchem S355 | <<locked>> | 82% | 35,085 psi | 57% | 2848 fps | 95.7% |
| Somchem S365 | <<locked>> | 88% | 30,777 psi | 50% | 2812 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 47,645 psi | 77% | 3005 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,322 psi | 68% | 2920 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 37,666 psi | 61% | 2890 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 38,493 psi | 62% | 2890 fps | 99.5% |
| Vihtavuori N150 | <<locked>> | 80% | 31,111 psi | 50% | 2717 fps | 95.7% |
| Vihtavuori N160 | <<locked>> | 92% | 41,365 psi | 67% | 3015 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 43,627 psi | 70% | 3015 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 80% | 36,985 psi | 60% | 2867 fps | 99% |
| Vihtavuori N550 | <<locked>> | 92% | 40,727 psi | 66% | 3012 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 34,316 psi | 55% | 2805 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 42,902 psi | 69% | 3054 fps | 99.2% |
| Winchester 760 | <<locked>> | 98% | 52,228 psi | 84% | 3271 fps | 95.7% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,407 psi | 64% | 2959 fps | 97.2% |
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 94 powders for 6 mm Creedmoor loaded with the .243 | 80gr | Osprey Virtus. Alliant Reloder-17 delivers the highest muzzle velocity at 3,399 fps; across all powders the maximum-charge window runs from 2,028 fps to 3,399 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 56–90 %, leaving at least 10 % headroom. The 80.0 gr projectile in 0.243" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Hodgdon H414 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 Reloder-17, Alliant Power Pro 2000-MR rank at the top here: for 6 mm Creedmoor with the .243 | 80gr | Osprey Virtus 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.