Load Specifications
Bullet Manufacturer:Sierra
Bullet Weight:100 gr
Bullet Diameter:0.243"
Bullet Length:<<locked>>
Caliber:6 x 47 Lapua load data
Case Length (l3):1.85"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:48 Grains of Water
Primer Size:Small Rifle (SR)
Barrel Length:24"
Max. allowed Pressure:63,091 psi
Recommended Twist Rate:1:8.5
Load data in caliber 6 x 47 Lapua with .243 | 100gr | Sierra Tipped GameKing bullet and 96 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 2015 | <<locked>> | 84% | 55,274 psi | 88% | 2818 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 54,085 psi | 86% | 2844 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 55,912 psi | 89% | 2910 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 56,724 psi | 90% | 2890 fps | 97.2% |
| Accurate 4064 | <<locked>> | 90% | 54,143 psi | 86% | 2894 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 53,548 psi | 85% | 2969 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 86% | 54,621 psi | 87% | 2923 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 92% | 55,579 psi | 88% | 2923 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 86% | 57,043 psi | 90% | 2923 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 54,375 psi | 86% | 2851 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 53,809 psi | 85% | 3035 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 55,230 psi | 88% | 2940 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 55,811 psi | 88% | 2963 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 54,969 psi | 87% | 3028 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 96% | 56,347 psi | 89% | 3068 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 39,450 psi | 63% | 2756 fps | 98.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 43,947 psi | 70% | 2917 fps | 97.9% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 54,360 psi | 86% | 2936 fps | 99.6% |
| Bofors RP3 | <<locked>> | 92% | 55,941 psi | 89% | 2956 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 56,028 psi | 89% | 2923 fps | 97.3% |
| Hodgdon Benchmark | <<locked>> | 84% | 54,897 psi | 87% | 2851 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 56,463 psi | 89% | 2956 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 54,563 psi | 86% | 2999 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 92% | 56,971 psi | 90% | 2969 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 98% | 56,869 psi | 90% | 3025 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 94% | 53,577 psi | 85% | 2923 fps | 96.2% |
| Hodgdon H4895 | <<locked>> | 86% | 55,158 psi | 87% | 2933 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 51,082 psi | 81% | 2897 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 54,288 psi | 86% | 2963 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 53,693 psi | 85% | 2999 fps | 97.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,418 psi | 56% | 1788 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 56,014 psi | 89% | 2930 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 54,926 psi | 87% | 2913 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 54,940 psi | 87% | 2904 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 88% | 54,911 psi | 87% | 2881 fps | 97.6% |
| IMR 4350ᴾ | <<locked>> | 100% | 56,347 psi | 89% | 2949 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 94% | 54,694 psi | 87% | 2907 fps | 97.5% |
| IMR 4831ᴾ | <<locked>> | 100% | 54,404 psi | 86% | 2963 fps | 99.6% |
| IMR 4895 | <<locked>> | 88% | 54,157 psi | 86% | 2946 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 86% | 57,043 psi | 90% | 2923 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 57,014 psi | 90% | 2904 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 54,172 psi | 86% | 2897 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 53,882 psi | 85% | 2844 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 54,911 psi | 87% | 2904 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 53,998 psi | 86% | 2897 fps | 98.6% |
| Lovex S070 | <<locked>> | 98% | 54,868 psi | 87% | 2933 fps | 97.9% |
| Norma 201 | <<locked>> | 88% | 56,623 psi | 90% | 2917 fps | 100% |
| Norma 202 | <<locked>> | 86% | 53,737 psi | 85% | 2867 fps | 100% |
| Norma 203B | <<locked>> | 90% | 55,013 psi | 87% | 2946 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 56,362 psi | 89% | 3012 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 90% | 55,898 psi | 89% | 2976 fps | 99.9% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 55,071 psi | 87% | 3005 fps | 98.5% |
| Ramshot TAC | <<locked>> | 84% | 53,737 psi | 85% | 2887 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 86% | 56,927 psi | 90% | 2963 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 54,389 psi | 86% | 2874 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,042 psi | 57% | 1834 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 56,260 psi | 89% | 2900 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 53,838 psi | 85% | 2897 fps | 98% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 56,608 psi | 90% | 3035 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 56,202 psi | 89% | 3071 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 53,359 psi | 85% | 2992 fps | 99.3% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 56,782 psi | 90% | 3077 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 84% | 54,273 psi | 86% | 2851 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 53,780 psi | 85% | 2864 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 55,796 psi | 88% | 2946 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 56,028 psi | 89% | 2923 fps | 97.3% |
| Shooters World Long Rifle | <<locked>> | 96% | 53,998 psi | 86% | 2897 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 86% | 54,172 psi | 86% | 2897 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 54,911 psi | 87% | 2904 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 54,868 psi | 87% | 2933 fps | 97.9% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 53,954 psi | 86% | 2956 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 55,477 psi | 88% | 2917 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 56,376 psi | 89% | 2946 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 54,723 psi | 87% | 2805 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 55,114 psi | 87% | 2808 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 54,215 psi | 86% | 2848 fps | 97.5% |
| Somchem S321 | <<locked>> | 82% | 54,346 psi | 86% | 2900 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 54,027 psi | 86% | 2802 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 55,448 psi | 88% | 2913 fps | 99.9% |
| Somchem S355 | <<locked>> | 94% | 56,086 psi | 89% | 2943 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 50,676 psi | 80% | 2959 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 54,491 psi | 86% | 2769 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,955 psi | 87% | 2789 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 56,811 psi | 90% | 2874 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 54,346 psi | 86% | 2848 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 54,056 psi | 86% | 2874 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 55,216 psi | 88% | 2953 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 84% | 53,751 psi | 85% | 2867 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 55,738 psi | 88% | 2887 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 54,462 psi | 86% | 2959 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 43,279 psi | 69% | 2838 fps | 98.6% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 55,709 psi | 88% | 2933 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 53,664 psi | 85% | 2917 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 56,869 psi | 90% | 3025 fps | 98.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 35,172 psi | 56% | 2749 fps | 98.3% |
| Winchester StaBALL Match | <<locked>> | 88% | 56,507 psi | 90% | 2956 fps | 100% |
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 48,979 psi | 78% | 2726 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 41,713 psi | 66% | 2651 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 48,689 psi | 77% | 2802 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 49,647 psi | 79% | 2776 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 39,450 psi | 63% | 2644 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 35,563 psi | 56% | 2625 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 45,179 psi | 72% | 2762 fps | 99.1% |
| ADI AR 2208 | <<locked>> | 80% | 38,203 psi | 61% | 2602 fps | 97.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 47,239 psi | 75% | 2769 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 47,384 psi | 75% | 2753 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 40,843 psi | 65% | 2785 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,826 psi | 60% | 2625 fps | 98.5% |
| Alliant Reloder-15 | <<locked>> | 80% | 40,872 psi | 65% | 2694 fps | 98% |
| Alliant Reloder-16 | <<locked>> | 86% | 35,708 psi | 57% | 2638 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 32,721 psi | 52% | 2585 fps | 96.5% |
| Alliant Reloder-23 | <<locked>> | 92% | 30,632 psi | 49% | 2530 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 96% | 38,189 psi | 61% | 2782 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 44,324 psi | 70% | 2762 fps | 98.2% |
| Bofors RP3 | <<locked>> | 80% | 37,623 psi | 60% | 2631 fps | 98.5% |
| Bofors RP7 | <<locked>> | 90% | 46,644 psi | 74% | 2762 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,907 psi | 78% | 2756 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,876 psi | 73% | 2785 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 50,705 psi | 80% | 2936 fps | 99.5% |
| Hodgdon H380 | <<locked>> | 80% | 38,566 psi | 61% | 2635 fps | 96.1% |
| Hodgdon H414 | <<locked>> | 90% | 43,482 psi | 69% | 2792 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 92% | 50,285 psi | 80% | 2867 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 45,571 psi | 72% | 2772 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 30,748 psi | 49% | 2477 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 41,524 psi | 66% | 2740 fps | 99.3% |
| Hodgdon Superformance | <<locked>> | 92% | 46,383 psi | 74% | 2867 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,310 psi | 42% | 1598 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 43,772 psi | 69% | 2723 fps | 99.2% |
| IMR 3031 | <<locked>> | 80% | 45,208 psi | 72% | 2766 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 40,118 psi | 64% | 2638 fps | 97.9% |
| IMR 4166 Enduron | <<locked>> | 82% | 45,542 psi | 72% | 2717 fps | 95.6% |
| IMR 4350 | <<locked>> | 94% | 46,615 psi | 74% | 2785 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 88% | 45,397 psi | 72% | 2740 fps | 95.4% |
| IMR 4831 | <<locked>> | 86% | 34,229 psi | 54% | 2575 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 41,858 psi | 66% | 2726 fps | 98.7% |
| IMR 8208 XBR | <<locked>> | 80% | 47,239 psi | 75% | 2769 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 80% | 53,519 psi | 85% | 2854 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 44,121 psi | 70% | 2736 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 45,005 psi | 71% | 2694 fps | 99.1% |
| Lovex S062 | <<locked>> | 80% | 40,190 psi | 64% | 2644 fps | 99.2% |
| Lovex S065 | <<locked>> | 86% | 39,755 psi | 63% | 2635 fps | 95.5% |
| Lovex S070 | <<locked>> | 90% | 42,946 psi | 68% | 2720 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 44,266 psi | 70% | 2713 fps | 99.7% |
| Norma 202 | <<locked>> | 80% | 44,295 psi | 70% | 2717 fps | 100% |
| Norma 203B | <<locked>> | 80% | 40,234 psi | 64% | 2680 fps | 98.3% |
| Norma URP | <<locked>> | 86% | 35,737 psi | 57% | 2625 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 39,552 psi | 63% | 2687 fps | 98% |
| Ramshot Hunter | <<locked>> | 92% | 42,322 psi | 67% | 2772 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 47,195 psi | 75% | 2776 fps | 97.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 46,412 psi | 74% | 2789 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 50,749 psi | 80% | 2815 fps | 99.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,643 psi | 42% | 1637 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 52,823 psi | 84% | 2851 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 41,582 psi | 66% | 2674 fps | 95.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 42,902 psi | 68% | 2795 fps | 98.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 34,824 psi | 55% | 2657 fps | 99.3% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 35,201 psi | 56% | 2638 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 37,681 psi | 60% | 2700 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 48,225 psi | 76% | 2756 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,930 psi | 66% | 2661 fps | 99.4% |
| Rottweil R 903 | <<locked>> | 80% | 35,375 psi | 56% | 2572 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 90% | 46,644 psi | 74% | 2762 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 86% | 39,755 psi | 63% | 2635 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 44,121 psi | 70% | 2736 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 40,190 psi | 64% | 2644 fps | 99.2% |
| Shooters World SW4350 | <<locked>> | 90% | 42,946 psi | 68% | 2720 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 36,318 psi | 58% | 2621 fps | 97.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 45,440 psi | 72% | 2746 fps | 97.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 43,540 psi | 69% | 2726 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 45,339 psi | 72% | 2661 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,739 psi | 60% | 2523 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 44,556 psi | 71% | 2684 fps | 95.4% |
| Somchem S321 | <<locked>> | 80% | 51,082 psi | 81% | 2848 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 45,165 psi | 72% | 2664 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 45,136 psi | 72% | 2743 fps | 99.1% |
| Somchem S355 | <<locked>> | 80% | 36,347 psi | 58% | 2582 fps | 97.8% |
| Somchem S365 | <<locked>> | 80% | 26,353 psi | 42% | 2402 fps | 95% |
| Vihtavuori N130 | <<locked>> | 80% | 51,111 psi | 81% | 2720 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 45,658 psi | 72% | 2654 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 41,394 psi | 66% | 2641 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 42,032 psi | 67% | 2651 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 34,403 psi | 55% | 2513 fps | 98.5% |
| Vihtavuori N160 | <<locked>> | 84% | 35,070 psi | 56% | 2572 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 47,181 psi | 75% | 2762 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 40,712 psi | 65% | 2644 fps | 100% |
| Vihtavuori N550 | <<locked>> | 86% | 36,767 psi | 58% | 2628 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 92% | 32,996 psi | 52% | 2608 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 30,589 psi | 48% | 2434 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 47,123 psi | 75% | 2812 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 43,482 psi | 69% | 2792 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 96% | 30,980 psi | 49% | 2615 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 43,047 psi | 68% | 2730 fps | 99.2% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 96 powders for 6 x 47 Lapua loaded with the .243 | 100gr | Sierra Tipped GameKing. ReloadSwiss RS 70 delivers the highest muzzle velocity at 3,077 fps; across all powders the maximum-charge window runs from 1,788 fps to 3,077 fps. Alliant Reloder-16 gives the best case fill at 100 %, and 96 of the 96 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (435 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.243" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-16, Alliant Reloder-23, Alliant Reloder-26 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.