Load Specifications
Load data in caliber .243 WSSM with .243 | 90gr | Speer Deep Curl Soft Point bullet and 99 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 Reloder-16.
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>> | 82% | 56,405 psi | 88% | 3035 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 56,144 psi | 88% | 3068 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 57,595 psi | 90% | 3136 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 54,433 psi | 85% | 3064 fps | 97.2% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,181 psi | 74% | 3018 fps | 97.5% |
| Accurate 4064 | <<locked>> | 88% | 56,275 psi | 88% | 3120 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 56,652 psi | 89% | 3215 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 84% | 55,753 psi | 87% | 3146 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 56,942 psi | 89% | 3153 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 54,708 psi | 86% | 3189 fps | 96.4% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,636 psi | 86% | 3094 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 56,202 psi | 88% | 3071 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 56,072 psi | 88% | 3281 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 54,331 psi | 85% | 3182 fps | 96.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 57,667 psi | 90% | 3179 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,433 psi | 85% | 3146 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 98% | 57,566 psi | 90% | 3278 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,376 psi | 87% | 3255 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 53,519 psi | 84% | 3173 fps | 96.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,425 psi | 70% | 3048 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 50,589 psi | 79% | 3241 fps | 99.4% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 55,811 psi | 87% | 3163 fps | 99.8% |
| Bofors RP3 | <<locked>> | 88% | 54,534 psi | 85% | 3136 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 54,563 psi | 86% | 3107 fps | 97.4% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,999 psi | 88% | 3074 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,389 psi | 85% | 3123 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,405 psi | 87% | 3153 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 94% | 55,390 psi | 87% | 3209 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 92% | 55,622 psi | 87% | 3166 fps | 97% |
| Hodgdon H4895 | <<locked>> | 84% | 56,333 psi | 88% | 3159 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 54,085 psi | 85% | 3140 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,637 psi | 89% | 3199 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 56,231 psi | 88% | 3248 fps | 98.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,752 psi | 56% | 1965 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 57,464 psi | 90% | 3159 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 56,739 psi | 89% | 3140 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,478 psi | 89% | 3133 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 56,159 psi | 88% | 3114 fps | 98.2% |
| IMR 4350 | <<locked>> | 96% | 55,129 psi | 86% | 3136 fps | 97.6% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,376 psi | 88% | 3143 fps | 98.1% |
| IMR 4831 | <<locked>> | 98% | 57,276 psi | 90% | 3205 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 55,854 psi | 88% | 3176 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,636 psi | 86% | 3094 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,956 psi | 88% | 3120 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,085 psi | 86% | 3074 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 56,550 psi | 89% | 3130 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,782 psi | 87% | 3130 fps | 99.1% |
| Lovex S070 | <<locked>> | 96% | 57,319 psi | 90% | 3179 fps | 98.6% |
| Norma 201 | <<locked>> | 84% | 54,650 psi | 86% | 3091 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,245 psi | 87% | 3091 fps | 100% |
| Norma 203B | <<locked>> | 88% | 57,130 psi | 90% | 3186 fps | 100% |
| Norma 204 | <<locked>> | 96% | 55,854 psi | 88% | 3189 fps | 96.5% |
| Norma MRPᴾ | <<locked>> | 100% | 49,835 psi | 78% | 3189 fps | 97.1% |
| Norma URP | <<locked>> | 96% | 55,680 psi | 87% | 3202 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 86% | 54,302 psi | 85% | 3153 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 96% | 54,346 psi | 85% | 3192 fps | 98.7% |
| Ramshot TAC | <<locked>> | 82% | 54,882 psi | 86% | 3114 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 82% | 54,621 psi | 86% | 3130 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,289 psi | 57% | 2011 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,666 psi | 87% | 3133 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 54,955 psi | 86% | 3212 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 54,853 psi | 86% | 3251 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 56,739 psi | 89% | 3238 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 55,753 psi | 87% | 3268 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 82% | 55,463 psi | 87% | 3074 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,114 psi | 86% | 3091 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 54,723 psi | 86% | 3130 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 52,707 psi | 83% | 3159 fps | 96.3% |
| Rottweil R 907 | <<locked>> | 92% | 54,563 psi | 86% | 3107 fps | 97.4% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,782 psi | 87% | 3130 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,956 psi | 88% | 3120 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,550 psi | 89% | 3130 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 57,319 psi | 90% | 3179 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 56,376 psi | 88% | 3192 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 57,319 psi | 90% | 3153 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,259 psi | 85% | 3117 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,666 psi | 87% | 3025 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,536 psi | 89% | 3025 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 56,072 psi | 88% | 3084 fps | 98.2% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 52,199 psi | 82% | 3153 fps | 96.1% |
| Somchem S335 | <<locked>> | 84% | 55,332 psi | 87% | 3022 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 56,811 psi | 89% | 3136 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 54,708 psi | 86% | 3123 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 53,998 psi | 85% | 3199 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 53,301 psi | 84% | 3133 fps | 97.2% |
| Vihtavuori N133 | <<locked>> | 84% | 56,028 psi | 88% | 3005 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,259 psi | 87% | 3054 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 55,651 psi | 87% | 3064 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,246 psi | 88% | 3100 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,244 psi | 85% | 3136 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 82% | 54,984 psi | 86% | 3091 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 57,638 psi | 90% | 3114 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 56,985 psi | 89% | 3199 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 49,530 psi | 78% | 3133 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,085 psi | 85% | 3107 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,492 psi | 87% | 3146 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 55,767 psi | 87% | 3212 fps | 98.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,900 psi | 63% | 3071 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,491 psi | 85% | 3127 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% | 52,968 psi | 83% | 2986 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,282 psi | 73% | 2913 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 53,737 psi | 84% | 3077 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 47,848 psi | 75% | 2946 fps | 95.7% |
| Accurate 3100 | <<locked>> | 96% | 40,901 psi | 64% | 2894 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 43,758 psi | 69% | 2910 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 34,882 psi | 55% | 2776 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 49,298 psi | 77% | 3038 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 41,872 psi | 66% | 2871 fps | 98.2% |
| ADI AR 2209 | <<locked>> | 98% | 50,995 psi | 80% | 3123 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,401 psi | 81% | 3041 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,228 psi | 82% | 3015 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,339 psi | 71% | 3077 fps | 98.9% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 51,024 psi | 80% | 3123 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,930 psi | 66% | 2897 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,918 psi | 70% | 2969 fps | 98.9% |
| Alliant Reloder-16 | 37.3 gr | 82% | 34,563 psi | 54% | 2789 fps | 95.6% |
| Alliant Reloder-17 | 39.2 gr | 80% | 36,434 psi | 57% | 2867 fps | 98.1% |
| Alliant Reloder-19 | <<locked>> | 98% | 50,299 psi | 79% | 3114 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 88% | 30,313 psi | 48% | 2684 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 90% | 35,259 psi | 55% | 2884 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,776 psi | 76% | 3041 fps | 99.1% |
| Bofors RP3 | <<locked>> | 80% | 41,930 psi | 66% | 2904 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 45,049 psi | 71% | 2927 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,736 psi | 83% | 3022 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 50,792 psi | 80% | 3064 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,511 psi | 67% | 2907 fps | 97.4% |
| Hodgdon H414 | <<locked>> | 86% | 42,438 psi | 67% | 2956 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 88% | 48,863 psi | 77% | 3041 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 49,835 psi | 78% | 3048 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,820 psi | 47% | 2615 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,948 psi | 72% | 3015 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 45,223 psi | 71% | 3038 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,760 psi | 42% | 1762 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,442 psi | 74% | 2989 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 49,821 psi | 78% | 3035 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,990 psi | 69% | 2907 fps | 98.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,195 psi | 72% | 2930 fps | 96.2% |
| IMR 4350 | <<locked>> | 90% | 45,600 psi | 71% | 2959 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 44,005 psi | 69% | 2907 fps | 95.4% |
| IMR 4831 | <<locked>> | 82% | 33,605 psi | 53% | 2726 fps | 95.2% |
| IMR 4895 | <<locked>> | 80% | 46,064 psi | 72% | 3002 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 80% | 51,401 psi | 81% | 3041 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,008 psi | 77% | 3009 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,472 psi | 76% | 2959 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 43,859 psi | 69% | 2907 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 38,682 psi | 61% | 2792 fps | 95.4% |
| Lovex S070 | <<locked>> | 86% | 41,655 psi | 65% | 2877 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 48,283 psi | 76% | 2982 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,776 psi | 76% | 2986 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,295 psi | 69% | 2956 fps | 99.2% |
| Norma 204 | <<locked>> | 94% | 52,054 psi | 82% | 3120 fps | 95.6% |
| Norma MRP | <<locked>> | 96% | 43,526 psi | 68% | 3054 fps | 95.3% |
| Norma URP | <<locked>> | 82% | 35,012 psi | 55% | 2776 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 44,121 psi | 69% | 2969 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 38,957 psi | 61% | 2881 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 51,387 psi | 81% | 3051 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,097 psi | 80% | 3068 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,050 psi | 42% | 1801 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,772 psi | 67% | 2887 fps | 95.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,921 psi | 75% | 3087 fps | 99.3% |
| ReloadSwiss RS 60 | 39.2 gr | 80% | 38,740 psi | 61% | 2940 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 34,505 psi | 54% | 2789 fps | 95.1% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 36,709 psi | 58% | 2861 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 52,214 psi | 82% | 3022 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,730 psi | 72% | 2927 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 39,450 psi | 62% | 2844 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 98% | 48,994 psi | 77% | 3091 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 86% | 45,049 psi | 71% | 2927 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 82% | 38,682 psi | 61% | 2792 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,008 psi | 77% | 3009 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,859 psi | 69% | 2907 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 86% | 41,655 psi | 65% | 2877 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,408 psi | 63% | 2894 fps | 98.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,980 psi | 78% | 3028 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,747 psi | 75% | 3002 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,037 psi | 77% | 2920 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,162 psi | 65% | 2772 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 43,337 psi | 68% | 2851 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 48,530 psi | 76% | 3084 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 49,081 psi | 77% | 2923 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,617 psi | 78% | 3018 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 40,059 psi | 63% | 2844 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 29,414 psi | 46% | 2664 fps | 96.9% |
| Somchem S385 | <<locked>> | 96% | 46,601 psi | 73% | 3009 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 49,487 psi | 78% | 2910 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,542 psi | 71% | 2900 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,195 psi | 72% | 2913 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,189 psi | 60% | 2776 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 34,142 psi | 54% | 2723 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 51,663 psi | 81% | 3038 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,585 psi | 70% | 2900 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 35,868 psi | 56% | 2779 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 88% | 33,112 psi | 52% | 2772 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,649 psi | 53% | 2690 fps | 97.4% |
| Winchester 748 | <<locked>> | 80% | 51,793 psi | 81% | 3087 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 42,786 psi | 67% | 2963 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,689 psi | 45% | 2707 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,485 psi | 74% | 3005 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 99 powders for .243 WSSM loaded with the .243 | 90gr | Speer Deep Curl Soft Point. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,281 fps; across all powders the maximum-charge window runs from 1,965 fps to 3,281 fps. Accurate 3100 gives the best case fill at 100 %, and 99 of the 99 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 90.0 gr projectile in 0.243" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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 Reloder-16 rank at the top here: for .243 WSSM with the .243 | 90gr | Speer Deep Curl Soft Point 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.