Load Specifications
Load data in caliber 6 mm Creedmoor with .243 | 107gr | Nosler Custom Competition bullet and 95 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-16 and Alliant Reloder-26.
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 2495 | <<locked>> | 84% | 55,782 psi | 90% | 2789 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,751 psi | 87% | 2802 fps | 98.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,720 psi | 82% | 2838 fps | 99.1% |
| Accurate 4064 | <<locked>> | 84% | 52,649 psi | 85% | 2792 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 52,982 psi | 85% | 2890 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 82% | 55,477 psi | 89% | 2874 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 53,127 psi | 86% | 2825 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,215 psi | 87% | 2930 fps | 97.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,579 psi | 90% | 2999 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 54,085 psi | 87% | 2927 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,766 psi | 87% | 2848 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 53,838 psi | 87% | 2867 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,824 psi | 87% | 2949 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,259 psi | 89% | 2979 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 53,316 psi | 86% | 2917 fps | 97.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,604 psi | 82% | 2920 fps | 97.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,398 psi | 76% | 2854 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,742 psi | 67% | 2772 fps | 98.2% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,737 psi | 88% | 3054 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,376 psi | 89% | 2890 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,180 psi | 74% | 2835 fps | 96% |
| Bofors RP3 | <<locked>> | 86% | 54,389 psi | 88% | 2864 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,604 psi | 82% | 2920 fps | 97.2% |
| Bofors RP7 | <<locked>> | 90% | 53,954 psi | 87% | 2844 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 86% | 54,868 psi | 88% | 2881 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 92% | 55,564 psi | 90% | 2949 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 90% | 55,492 psi | 90% | 2907 fps | 98.1% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 55,448 psi | 89% | 2920 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,143 psi | 87% | 2874 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 52,678 psi | 85% | 2867 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,753 psi | 90% | 2986 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,361 psi | 59% | 1781 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,359 psi | 86% | 2828 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,941 psi | 90% | 2858 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,332 psi | 89% | 2841 fps | 99% |
| IMR 4350 | <<locked>> | 94% | 54,940 psi | 89% | 2877 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,782 psi | 90% | 2874 fps | 99% |
| IMR 4831 | <<locked>> | 94% | 53,490 psi | 86% | 2884 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,259 psi | 89% | 2897 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 53,882 psi | 87% | 2858 fps | 95.8% |
| Lovex D073.6 | <<locked>> | 82% | 55,506 psi | 90% | 2841 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,360 psi | 88% | 2795 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 52,620 psi | 85% | 2802 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,448 psi | 89% | 2867 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 53,534 psi | 86% | 2858 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,003 psi | 68% | 2684 fps | 97.5% |
| Norma 201 | <<locked>> | 82% | 54,186 psi | 87% | 2815 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,824 psi | 88% | 2812 fps | 100% |
| Norma 203B | <<locked>> | 84% | 53,127 psi | 86% | 2851 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,390 psi | 89% | 2927 fps | 97.7% |
| Norma MRPᴾ | <<locked>> | 100% | 53,577 psi | 86% | 3002 fps | 98.9% |
| Norma URP | <<locked>> | 94% | 55,245 psi | 89% | 2930 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 53,780 psi | 87% | 2877 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 54,157 psi | 87% | 2930 fps | 99.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 43,932 psi | 71% | 2769 fps | 96.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,724 psi | 59% | 1818 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,911 psi | 89% | 2861 fps | 99.3% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,665 psi | 88% | 2933 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,433 psi | 88% | 2969 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 52,692 psi | 85% | 2913 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,013 psi | 89% | 2995 fps | 100% |
| Rottweil R 902 | <<locked>> | 84% | 54,708 psi | 88% | 2812 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,650 psi | 88% | 2861 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,912 psi | 90% | 2900 fps | 96.8% |
| Rottweil R 905 | <<locked>> | 98% | 52,518 psi | 85% | 2904 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 90% | 53,954 psi | 87% | 2844 fps | 98.4% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,448 psi | 89% | 2867 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,506 psi | 90% | 2841 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 52,620 psi | 85% | 2802 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 53,534 psi | 86% | 2858 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,999 psi | 90% | 2917 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,664 psi | 87% | 2841 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,940 psi | 89% | 2746 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,840 psi | 90% | 2749 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,434 psi | 89% | 2822 fps | 99% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,767 psi | 90% | 2959 fps | 98.1% |
| Somchem S335 | <<locked>> | 82% | 54,752 psi | 88% | 2746 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,375 psi | 88% | 2854 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 54,288 psi | 88% | 2933 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 53,287 psi | 86% | 2884 fps | 98.4% |
| Vihtavuori N133 | <<locked>> | 82% | 55,390 psi | 89% | 2726 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,795 psi | 88% | 2772 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,187 psi | 89% | 2789 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,782 psi | 90% | 2828 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,056 psi | 87% | 2874 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,095 psi | 79% | 2799 fps | 97.2% |
| Vihtavuori N540 | <<locked>> | 84% | 53,432 psi | 86% | 2785 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 53,258 psi | 86% | 2881 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,069 psi | 86% | 2933 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,099 psi | 87% | 2989 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 53,896 psi | 87% | 2844 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,564 psi | 90% | 2949 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,888 psi | 69% | 2904 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,824 psi | 87% | 2851 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,403 psi | 86% | 2874 fps | 97.4% |
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 2495 | <<locked>> | 80% | 49,008 psi | 79% | 2694 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,166 psi | 76% | 2690 fps | 96.9% |
| Accurate 3100 | <<locked>> | 90% | 35,940 psi | 58% | 2556 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 46,427 psi | 75% | 2697 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,128 psi | 57% | 2552 fps | 97.2% |
| ADI AR 2206H | <<locked>> | 80% | 52,011 psi | 84% | 2818 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,266 psi | 71% | 2671 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 44,599 psi | 72% | 2756 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,457 psi | 78% | 2881 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 44,556 psi | 72% | 2756 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,382 psi | 72% | 2694 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,572 psi | 77% | 2762 fps | 99.8% |
| Alliant Reloder-16 | 33.9 gr | 80% | 34,606 psi | 56% | 2562 fps | 97.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 38,957 psi | 63% | 2690 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,019 psi | 71% | 2749 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,135 psi | 71% | 2795 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,919 psi | 43% | 2369 fps | 95.5% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,548 psi | 56% | 2598 fps | 95.6% |
| Alliant Reloder-26 | 40.2 gr | 86% | 32,851 psi | 53% | 2598 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,532 psi | 83% | 2828 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 43,526 psi | 70% | 2779 fps | 95.1% |
| Bofors RP3 | <<locked>> | 80% | 44,744 psi | 72% | 2707 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 44,135 psi | 71% | 2795 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 39,363 psi | 63% | 2569 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 44,947 psi | 72% | 2710 fps | 99% |
| Hodgdon H414 | <<locked>> | 80% | 37,115 psi | 60% | 2598 fps | 95% |
| Hodgdon H4350 | <<locked>> | 82% | 42,714 psi | 69% | 2674 fps | 95.3% |
| Hodgdon H4831 | <<locked>> | 98% | 52,185 psi | 84% | 2867 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,140 psi | 52% | 2461 fps | 98% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,907 psi | 79% | 2805 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 41,626 psi | 67% | 2726 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,977 psi | 44% | 1588 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,343 psi | 81% | 2779 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,528 psi | 75% | 2707 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,602 psi | 78% | 2730 fps | 98% |
| IMR 4350 | <<locked>> | 84% | 39,943 psi | 64% | 2605 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,988 psi | 66% | 2605 fps | 96% |
| IMR 4831 | <<locked>> | 80% | 33,953 psi | 55% | 2507 fps | 96.9% |
| IMR 4895 | <<locked>> | 80% | 48,776 psi | 79% | 2792 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 50,473 psi | 81% | 2802 fps | 95% |
| Lovex D073.6 | <<locked>> | 80% | 52,257 psi | 84% | 2795 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,937 psi | 82% | 2743 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,470 psi | 75% | 2700 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,334 psi | 62% | 2552 fps | 96.8% |
| Lovex S070 | <<locked>> | 80% | 36,637 psi | 59% | 2530 fps | 95% |
| Lovex S071 | <<locked>> | 94% | 34,809 psi | 56% | 2530 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 50,720 psi | 82% | 2762 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,329 psi | 83% | 2759 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,920 psi | 76% | 2749 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 45,208 psi | 73% | 2749 fps | 95.4% |
| Norma MRP | <<locked>> | 92% | 40,770 psi | 66% | 2756 fps | 96% |
| Norma URP | <<locked>> | 80% | 35,056 psi | 57% | 2546 fps | 97.1% |
| Ramshot Big Game | <<locked>> | 80% | 47,137 psi | 76% | 2772 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 36,303 psi | 59% | 2589 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 98% | 40,959 psi | 66% | 2707 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,644 psi | 45% | 1631 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,237 psi | 73% | 2694 fps | 97.8% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,010 psi | 82% | 2877 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,394 psi | 67% | 2746 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,911 psi | 56% | 2569 fps | 96.8% |
| ReloadSwiss RS 70 | 37.1 gr | 80% | 34,200 psi | 55% | 2572 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 48,283 psi | 78% | 2713 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,989 psi | 68% | 2651 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 49,269 psi | 79% | 2792 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 92% | 42,975 psi | 69% | 2730 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 39,363 psi | 63% | 2569 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,334 psi | 62% | 2552 fps | 96.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,257 psi | 84% | 2795 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,470 psi | 75% | 2700 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,637 psi | 59% | 2530 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,975 psi | 69% | 2700 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,343 psi | 81% | 2785 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,750 psi | 83% | 2700 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,584 psi | 70% | 2566 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,724 psi | 61% | 2500 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 42,569 psi | 69% | 2723 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 51,329 psi | 83% | 2697 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,337 psi | 68% | 2648 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 31,560 psi | 51% | 2503 fps | 99% |
| Somchem S385 | <<locked>> | 90% | 41,060 psi | 66% | 2661 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 52,228 psi | 84% | 2684 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,530 psi | 78% | 2684 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,747 psi | 79% | 2694 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,451 psi | 65% | 2582 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,477 psi | 59% | 2549 fps | 97.5% |
| Vihtavuori N165 | <<locked>> | 96% | 43,134 psi | 70% | 2690 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 46,934 psi | 76% | 2687 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,839 psi | 58% | 2546 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 82% | 29,428 psi | 47% | 2448 fps | 95.7% |
| Vihtavuori N560 | <<locked>> | 98% | 50,575 psi | 82% | 2927 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,665 psi | 58% | 2520 fps | 99.1% |
| Winchester 760 | <<locked>> | 80% | 37,115 psi | 60% | 2598 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,948 psi | 43% | 2451 fps | 96.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,430 psi | 81% | 2795 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 43,250 psi | 70% | 2697 fps | 95% |
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 95 powders for 6 mm Creedmoor loaded with the .243 | 107gr | Nosler Custom Competition. Alliant Reloder-26 delivers the highest muzzle velocity at 3,054 fps; across all powders the maximum-charge window runs from 1,781 fps to 3,054 fps. Accurate 3100 gives the best case fill at 100 %, and 95 of the 95 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (427 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 107.0 gr projectile in 0.243" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, 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 70, Alliant Reloder-16, Alliant Reloder-26 rank at the top here: for 6 mm Creedmoor with the .243 | 107gr | Nosler Custom Competition 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.