Load Specifications
Bullet Manufacturer:Sierra
Bullet Weight:95 gr
Bullet Diameter:0.243"
Bullet Length:<<locked>>
Caliber:.243 WSSM load data
Case Length (l3):1.663"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:53.9 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:8.5
Load data in caliber .243 WSSM with .243 | 95gr | Sierra MatchKing bullet and 98 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance 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>> | 82% | 55,970 psi | 88% | 2940 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,695 psi | 87% | 2972 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 56,942 psi | 89% | 3038 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 57,725 psi | 90% | 3031 fps | 97.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 46,340 psi | 73% | 2927 fps | 97.5% |
| Accurate 4064 | <<locked>> | 88% | 55,535 psi | 87% | 3018 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 55,854 psi | 88% | 3117 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 84% | 55,317 psi | 87% | 3051 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 56,463 psi | 88% | 3054 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,954 psi | 85% | 3091 fps | 96.4% |
| ADI Benchmark 8208 | <<locked>> | 84% | 57,653 psi | 90% | 3051 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,361 psi | 87% | 2969 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 55,419 psi | 87% | 3182 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 56,782 psi | 89% | 3077 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 57,406 psi | 90% | 3104 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 56,826 psi | 89% | 3176 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 54,244 psi | 85% | 3150 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,808 psi | 83% | 3077 fps | 96.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,627 psi | 68% | 2956 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 49,516 psi | 78% | 3140 fps | 99.4% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,100 psi | 86% | 3064 fps | 99.8% |
| Bofors RP3 | <<locked>> | 90% | 57,740 psi | 90% | 3097 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 57,464 psi | 90% | 3068 fps | 98.1% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,738 psi | 87% | 2979 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 57,450 psi | 90% | 3081 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,650 psi | 86% | 3051 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 94% | 54,766 psi | 86% | 3110 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 92% | 55,129 psi | 86% | 3071 fps | 97.1% |
| Hodgdon H4895 | <<locked>> | 84% | 55,927 psi | 88% | 3064 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 56,637 psi | 89% | 3091 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,811 psi | 87% | 3100 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 55,390 psi | 87% | 3150 fps | 98.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,984 psi | 56% | 1900 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 57,232 psi | 90% | 3068 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 56,014 psi | 88% | 3041 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,753 psi | 87% | 3035 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,680 psi | 87% | 3018 fps | 98.3% |
| IMR 4350 | <<locked>> | 96% | 54,447 psi | 85% | 3041 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,782 psi | 87% | 3048 fps | 98.2% |
| IMR 4831 | <<locked>> | 98% | 56,246 psi | 88% | 3104 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 55,187 psi | 86% | 3077 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 57,653 psi | 90% | 3051 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,303 psi | 87% | 3025 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 57,711 psi | 90% | 3025 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 55,854 psi | 88% | 3031 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,201 psi | 87% | 3035 fps | 99.1% |
| Lovex S070 | <<locked>> | 96% | 56,608 psi | 89% | 3081 fps | 98.6% |
| Norma 201 | <<locked>> | 86% | 57,740 psi | 90% | 3051 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,694 psi | 86% | 2995 fps | 100% |
| Norma 203B | <<locked>> | 88% | 56,608 psi | 89% | 3091 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,042 psi | 86% | 3091 fps | 96.6% |
| Norma MRPᴾ | <<locked>> | 100% | 48,994 psi | 77% | 3091 fps | 97.2% |
| Norma URP | <<locked>> | 96% | 54,882 psi | 86% | 3104 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 88% | 57,276 psi | 90% | 3114 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 57,145 psi | 90% | 3153 fps | 99.2% |
| Ramshot TAC | <<locked>> | 82% | 54,447 psi | 85% | 3018 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 84% | 57,667 psi | 90% | 3091 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,245 psi | 57% | 1936 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,737 psi | 86% | 3031 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,302 psi | 85% | 3114 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 57,740 psi | 90% | 3205 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 55,927 psi | 88% | 3143 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,766 psi | 86% | 3166 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 82% | 54,984 psi | 86% | 2976 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,592 psi | 86% | 2992 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 57,609 psi | 90% | 3087 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,851 psi | 81% | 3061 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 94% | 57,464 psi | 90% | 3068 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,201 psi | 87% | 3035 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,303 psi | 87% | 3025 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,854 psi | 88% | 3031 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 56,608 psi | 89% | 3081 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,811 psi | 87% | 3097 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 56,637 psi | 89% | 3054 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 57,217 psi | 90% | 3074 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,347 psi | 87% | 2930 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,854 psi | 88% | 2930 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 55,288 psi | 87% | 2986 fps | 98.2% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 51,358 psi | 80% | 3054 fps | 96.2% |
| Somchem S335 | <<locked>> | 84% | 54,824 psi | 86% | 2923 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 56,159 psi | 88% | 3038 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 54,215 psi | 85% | 3031 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 57,203 psi | 90% | 3159 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,605 psi | 82% | 3038 fps | 97.3% |
| Vihtavuori N133 | <<locked>> | 84% | 55,709 psi | 87% | 2913 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,607 psi | 86% | 2956 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,347 psi | 87% | 2972 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,579 psi | 87% | 3005 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 57,072 psi | 89% | 3097 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 82% | 54,534 psi | 85% | 2995 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 56,869 psi | 89% | 3018 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 56,014 psi | 88% | 3100 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,559 psi | 76% | 3038 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 57,435 psi | 90% | 3071 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,853 psi | 86% | 3048 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,129 psi | 86% | 3117 fps | 98.3% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,175 psi | 61% | 2976 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 86% | 57,624 psi | 90% | 3087 fps | 100% |
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% | 52,779 psi | 83% | 2894 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,484 psi | 71% | 2818 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 52,939 psi | 83% | 2979 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,411 psi | 70% | 2795 fps | 95% |
| Accurate 3100 | <<locked>> | 94% | 37,594 psi | 59% | 2746 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 43,004 psi | 67% | 2815 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 34,389 psi | 54% | 2694 fps | 95.8% |
| ADI AR 2206H | <<locked>> | 80% | 48,660 psi | 76% | 2940 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 41,481 psi | 65% | 2779 fps | 98.4% |
| ADI AR 2209 | <<locked>> | 98% | 50,517 psi | 79% | 3031 fps | 95.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,734 psi | 80% | 2943 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,069 psi | 82% | 2923 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,715 psi | 70% | 2982 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,278 psi | 65% | 2802 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,295 psi | 69% | 2874 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 82% | 34,316 psi | 54% | 2707 fps | 95.9% |
| Alliant Reloder-17 | 37.3 gr | 80% | 36,100 psi | 57% | 2782 fps | 98.3% |
| Alliant Reloder-19 | <<locked>> | 98% | 49,487 psi | 78% | 3015 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 88% | 29,878 psi | 47% | 2605 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 90% | 34,766 psi | 54% | 2802 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,182 psi | 76% | 2946 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 41,321 psi | 65% | 2812 fps | 99.5% |
| Bofors RP7 | <<locked>> | 86% | 44,744 psi | 70% | 2841 fps | 95.4% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,373 psi | 82% | 2927 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,111 psi | 79% | 2969 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,003 psi | 66% | 2815 fps | 97.6% |
| Hodgdon H414 | <<locked>> | 86% | 42,047 psi | 66% | 2867 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 88% | 48,472 psi | 76% | 2953 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 49,182 psi | 77% | 2949 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,660 psi | 46% | 2543 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,513 psi | 71% | 2927 fps | 99.9% |
| Hodgdon Superformance | 43.3 gr | 88% | 44,411 psi | 70% | 2943 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,818 psi | 42% | 1696 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,108 psi | 74% | 2897 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 49,226 psi | 77% | 2940 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,584 psi | 68% | 2818 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,021 psi | 72% | 2841 fps | 96.4% |
| IMR 4350 | <<locked>> | 90% | 44,947 psi | 70% | 2867 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,337 psi | 68% | 2815 fps | 95.5% |
| IMR 4831 | <<locked>> | 82% | 33,388 psi | 52% | 2651 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 45,426 psi | 71% | 2904 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 80% | 50,734 psi | 80% | 2943 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,486 psi | 76% | 2917 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,414 psi | 76% | 2871 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 43,714 psi | 69% | 2822 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 38,159 psi | 60% | 2703 fps | 95.6% |
| Lovex S070 | <<locked>> | 86% | 41,350 psi | 65% | 2795 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 47,529 psi | 74% | 2884 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,008 psi | 75% | 2887 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,671 psi | 68% | 2861 fps | 99.2% |
| Norma 204 | <<locked>> | 94% | 51,459 psi | 81% | 3028 fps | 95.8% |
| Norma MRP | <<locked>> | 96% | 42,902 psi | 67% | 2963 fps | 95.4% |
| Norma URP | <<locked>> | 82% | 34,519 psi | 54% | 2694 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 43,511 psi | 68% | 2874 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 38,334 psi | 60% | 2792 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 50,836 psi | 80% | 2956 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,444 psi | 79% | 2972 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,122 psi | 43% | 1736 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,105 psi | 66% | 2795 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,369 psi | 74% | 2992 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,377 psi | 60% | 2851 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 33,982 psi | 53% | 2703 fps | 95.2% |
| ReloadSwiss RS 70 | 39.7 gr | 84% | 36,201 psi | 57% | 2772 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 51,605 psi | 81% | 2923 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,266 psi | 71% | 2831 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 38,798 psi | 61% | 2749 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 98% | 48,399 psi | 76% | 2999 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 86% | 44,744 psi | 70% | 2841 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 82% | 38,159 psi | 60% | 2703 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,486 psi | 76% | 2917 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,714 psi | 69% | 2822 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 41,350 psi | 65% | 2795 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,972 psi | 63% | 2805 fps | 98.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,371 psi | 77% | 2933 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,311 psi | 74% | 2910 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,849 psi | 77% | 2831 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,930 psi | 64% | 2687 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,815 psi | 67% | 2759 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 47,935 psi | 75% | 2992 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 48,356 psi | 76% | 2825 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,023 psi | 77% | 2923 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 39,378 psi | 62% | 2753 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 28,964 psi | 45% | 2582 fps | 97.1% |
| Somchem S385 | <<locked>> | 96% | 46,064 psi | 72% | 2920 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 49,255 psi | 77% | 2818 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,266 psi | 71% | 2812 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,542 psi | 71% | 2818 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,565 psi | 59% | 2684 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 33,605 psi | 53% | 2635 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 51,068 psi | 80% | 2940 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,077 psi | 69% | 2808 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 35,520 psi | 56% | 2697 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 88% | 32,576 psi | 51% | 2687 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,272 psi | 52% | 2608 fps | 97.6% |
| Winchester 748 | <<locked>> | 80% | 51,314 psi | 80% | 2992 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 42,047 psi | 66% | 2867 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,398 psi | 45% | 2631 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,789 psi | 73% | 2910 fps | 99.8% |
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 98 powders for .243 WSSM loaded with the .243 | 95gr | Sierra MatchKing. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,205 fps; across all powders the maximum-charge window runs from 1,900 fps to 3,205 fps. Accurate 3100 gives the best case fill at 100 %, and 98 of the 98 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 95.0 gr projectile in 0.243" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .243 WSSM with the .243 | 95gr | Sierra MatchKing 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.