Load Specifications
Bullet Manufacturer:Sierra
Bullet Weight:107 gr
Bullet Diameter:0.243"
Bullet Length:<<locked>>
Caliber:6 mm Creedmoor load data
Case Length (l3):1.92"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:51.5 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:62,001 psi
Recommended Twist Rate:1:8.5
Load data in caliber 6 mm Creedmoor with .243 | 107gr | Sierra Hollow Point Boat Tail bullet and 95 powders. The key underlying parameters are shown in the table above.
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 2495 | <<locked>> | 82% | 52,910 psi | 85% | 2753 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,404 psi | 88% | 2815 fps | 98.3% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,358 psi | 83% | 2851 fps | 99.2% |
| Accurate 4064 | <<locked>> | 84% | 53,447 psi | 86% | 2808 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 53,708 psi | 87% | 2907 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 56,086 psi | 90% | 3048 fps | 97.3% |
| ADI AR 2206H | <<locked>> | 82% | 55,854 psi | 90% | 2884 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 53,432 psi | 86% | 2831 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,853 psi | 88% | 2946 fps | 97.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,562 psi | 85% | 2933 fps | 96% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 52,257 psi | 84% | 2949 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,070 psi | 87% | 2858 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,607 psi | 88% | 2881 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 54,520 psi | 88% | 2963 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,535 psi | 90% | 2986 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 53,911 psi | 87% | 2930 fps | 97.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,126 psi | 82% | 2930 fps | 97.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,022 psi | 77% | 2867 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,901 psi | 68% | 2782 fps | 98.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,317 psi | 89% | 3068 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,622 psi | 90% | 2897 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,760 psi | 75% | 2848 fps | 96.2% |
| Bofors RP3 | <<locked>> | 86% | 54,737 psi | 88% | 2871 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,126 psi | 82% | 2930 fps | 97.4% |
| Bofors RP7 | <<locked>> | 90% | 54,578 psi | 88% | 2858 fps | 98.6% |
| Hodgdon H380 | <<locked>> | 86% | 55,550 psi | 90% | 2894 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 92% | 55,840 psi | 90% | 2956 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 90% | 55,767 psi | 90% | 2913 fps | 98.2% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 56,014 psi | 90% | 2933 fps | 96.1% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 55,172 psi | 89% | 2920 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,839 psi | 88% | 2887 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 53,026 psi | 86% | 2874 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 52,257 psi | 84% | 2933 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,303 psi | 59% | 1785 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,099 psi | 87% | 2841 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 53,098 psi | 86% | 2818 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,622 psi | 90% | 2851 fps | 99% |
| IMR 4350 | <<locked>> | 94% | 55,158 psi | 89% | 2887 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 90% | 56,043 psi | 90% | 2884 fps | 99.1% |
| IMR 4831 | <<locked>> | 94% | 54,172 psi | 87% | 2897 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,985 psi | 90% | 2910 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 54,462 psi | 88% | 2874 fps | 96% |
| Lovex S060 | <<locked>> | 82% | 54,665 psi | 88% | 2805 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 53,345 psi | 86% | 2815 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 56,101 psi | 90% | 2881 fps | 99.7% |
| Lovex S070 | <<locked>> | 92% | 53,780 psi | 87% | 2867 fps | 99% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,569 psi | 69% | 2697 fps | 97.7% |
| Norma 201 | <<locked>> | 82% | 54,534 psi | 88% | 2822 fps | 100% |
| Norma 202 | <<locked>> | 82% | 55,201 psi | 89% | 2822 fps | 100% |
| Norma 203B | <<locked>> | 84% | 53,896 psi | 87% | 2867 fps | 100% |
| Norma 204 | <<locked>> | 94% | 56,014 psi | 90% | 2940 fps | 97.9% |
| Norma MRPᴾ | <<locked>> | 100% | 54,157 psi | 87% | 3015 fps | 99% |
| Norma URP | <<locked>> | 94% | 55,970 psi | 90% | 2943 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 54,520 psi | 88% | 2894 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 54,752 psi | 88% | 2943 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,425 psi | 72% | 2782 fps | 96.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,970 psi | 60% | 1827 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 55,550 psi | 90% | 2877 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 55,448 psi | 89% | 2949 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 55,172 psi | 89% | 2982 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 53,374 psi | 86% | 2927 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,593 psi | 90% | 3009 fps | 100% |
| Rottweil R 902 | <<locked>> | 84% | 55,027 psi | 89% | 2822 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,998 psi | 89% | 2867 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 52,866 psi | 85% | 2854 fps | 96.3% |
| Rottweil R 905 | <<locked>> | 98% | 53,127 psi | 86% | 2917 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 90% | 54,578 psi | 88% | 2858 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 92% | 56,101 psi | 90% | 2881 fps | 99.7% |
| Shooters World Precision | <<locked>> | 84% | 53,345 psi | 86% | 2815 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 53,780 psi | 87% | 2867 fps | 99% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 53,127 psi | 86% | 2881 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,389 psi | 88% | 2854 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,303 psi | 89% | 2753 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 52,939 psi | 85% | 2713 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 52,489 psi | 85% | 2782 fps | 98.7% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,985 psi | 90% | 2966 fps | 98.2% |
| Somchem S335 | <<locked>> | 82% | 55,100 psi | 89% | 2753 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,085 psi | 89% | 2867 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 55,013 psi | 89% | 2943 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 53,911 psi | 87% | 2894 fps | 98.5% |
| Vihtavuori N133 | <<locked>> | 82% | 55,825 psi | 90% | 2736 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,608 psi | 90% | 2785 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,927 psi | 90% | 2802 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 52,895 psi | 85% | 2792 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 54,708 psi | 88% | 2887 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,617 psi | 80% | 2812 fps | 97.4% |
| Vihtavuori N540 | <<locked>> | 84% | 54,070 psi | 87% | 2799 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 53,911 psi | 87% | 2894 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,795 psi | 87% | 2946 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,636 psi | 88% | 3002 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 54,056 psi | 87% | 2851 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 52,634 psi | 85% | 2904 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,366 psi | 70% | 2917 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,157 psi | 87% | 2858 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,983 psi | 87% | 2887 fps | 97.6% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 49,458 psi | 80% | 2700 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,471 psi | 77% | 2697 fps | 97.1% |
| Accurate 3100 | <<locked>> | 88% | 34,011 psi | 55% | 2510 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 46,804 psi | 75% | 2707 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,447 psi | 57% | 2562 fps | 97.4% |
| Accurate High Country | <<locked>> | 96% | 48,849 psi | 79% | 2927 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 52,373 psi | 84% | 2828 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,599 psi | 72% | 2680 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 45,194 psi | 73% | 2772 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 98% | 49,124 psi | 79% | 2871 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,820 psi | 79% | 2890 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,730 psi | 72% | 2703 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,906 psi | 77% | 2772 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,911 psi | 56% | 2575 fps | 97.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,233 psi | 63% | 2697 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,614 psi | 72% | 2762 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,715 psi | 72% | 2812 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 82% | 27,137 psi | 44% | 2379 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,766 psi | 56% | 2605 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 86% | 33,330 psi | 54% | 2615 fps | 96.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,214 psi | 84% | 2844 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 43,743 psi | 71% | 2789 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 45,092 psi | 73% | 2717 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 44,715 psi | 72% | 2812 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 39,972 psi | 64% | 2585 fps | 95.3% |
| Hodgdon H380 | <<locked>> | 80% | 45,585 psi | 74% | 2726 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 80% | 37,434 psi | 60% | 2605 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 82% | 43,308 psi | 70% | 2690 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 98% | 52,750 psi | 85% | 2881 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 98% | 51,532 psi | 83% | 2861 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,445 psi | 52% | 2470 fps | 98.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,632 psi | 80% | 2822 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 39,218 psi | 63% | 2677 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,992 psi | 44% | 1591 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,662 psi | 82% | 2789 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,905 psi | 76% | 2713 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,936 psi | 79% | 2740 fps | 98.1% |
| IMR 4350 | <<locked>> | 84% | 40,495 psi | 65% | 2618 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,263 psi | 67% | 2615 fps | 96.2% |
| IMR 4831 | <<locked>> | 80% | 34,301 psi | 55% | 2520 fps | 97.1% |
| IMR 4895 | <<locked>> | 80% | 49,124 psi | 79% | 2802 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 51,024 psi | 82% | 2815 fps | 95.2% |
| Lovex S060 | <<locked>> | 80% | 51,663 psi | 83% | 2759 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,152 psi | 76% | 2717 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,667 psi | 62% | 2562 fps | 97% |
| Lovex S070 | <<locked>> | 80% | 36,956 psi | 60% | 2539 fps | 95.2% |
| Lovex S071 | <<locked>> | 94% | 35,114 psi | 57% | 2539 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 51,082 psi | 82% | 2772 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,692 psi | 83% | 2769 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,253 psi | 76% | 2759 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 45,788 psi | 74% | 2762 fps | 95.6% |
| Norma MRP | <<locked>> | 90% | 38,334 psi | 62% | 2703 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 35,360 psi | 57% | 2559 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 80% | 47,456 psi | 77% | 2779 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 80% | 34,490 psi | 56% | 2546 fps | 95% |
| Ramshot Magnum | <<locked>> | 98% | 41,394 psi | 67% | 2720 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,673 psi | 45% | 1634 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,513 psi | 73% | 2707 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,793 psi | 84% | 2894 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,713 psi | 67% | 2756 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,215 psi | 57% | 2579 fps | 97% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 34,461 psi | 56% | 2582 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 48,675 psi | 79% | 2723 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,337 psi | 68% | 2657 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 49,864 psi | 80% | 2805 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 92% | 43,627 psi | 70% | 2746 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 39,972 psi | 64% | 2585 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,667 psi | 62% | 2562 fps | 97% |
| Shooters World Precision | <<locked>> | 80% | 47,152 psi | 76% | 2717 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,956 psi | 60% | 2539 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,613 psi | 70% | 2717 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,039 psi | 82% | 2802 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,127 psi | 84% | 2707 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,947 psi | 71% | 2575 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,029 psi | 61% | 2510 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 43,207 psi | 70% | 2740 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 51,721 psi | 83% | 2707 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,685 psi | 69% | 2657 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 31,879 psi | 51% | 2513 fps | 99.1% |
| Somchem S385 | <<locked>> | 90% | 41,336 psi | 67% | 2667 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 52,634 psi | 85% | 2694 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,936 psi | 79% | 2690 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,095 psi | 79% | 2703 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,785 psi | 66% | 2589 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,825 psi | 59% | 2559 fps | 97.6% |
| Vihtavuori N165 | <<locked>> | 94% | 40,814 psi | 66% | 2648 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 47,601 psi | 77% | 2700 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,405 psi | 59% | 2562 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 82% | 29,762 psi | 48% | 2457 fps | 95.9% |
| Vihtavuori N560 | <<locked>> | 98% | 51,126 psi | 82% | 2940 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,158 psi | 58% | 2533 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 37,695 psi | 61% | 2612 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,657 psi | 41% | 2405 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,763 psi | 82% | 2805 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 43,772 psi | 71% | 2710 fps | 95.2% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 106 powders for 6 mm Creedmoor loaded with the .243 | 107gr | Sierra Hollow Point Boat Tail. Alliant Reloder-26 delivers the highest muzzle velocity at 3,068 fps; across all powders the maximum-charge window runs from 1,785 fps to 3,068 fps. Accurate 3100 gives the best case fill at 100 %, and 106 of the 106 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (427 MPa), the top charges use 54–90 %, 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, Accurate High Country, Accurate MAGPRO 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. As outliers, ADI AR 2225, Baschieri & Pellagri 109, Bofors RP30 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.