Load Specifications
Bullet Manufacturer:Berger
Bullet Weight:100 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 | 100gr | Berger BT Target bullet and 107 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 Hodgdon Superformance.
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% | 57,740 psi | 90% | 2887 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 57,363 psi | 90% | 2920 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 55,637 psi | 87% | 2933 fps | 98.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 48,704 psi | 76% | 2907 fps | 98.5% |
| Accurate 4064 | <<locked>> | 88% | 57,725 psi | 90% | 2976 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 54,462 psi | 85% | 3025 fps | 99.9% |
| Accurate High Countryᴾ | <<locked>> | 100% | 53,026 psi | 83% | 3100 fps | 96.1% |
| ADI AR 2206H | <<locked>> | 84% | 57,203 psi | 90% | 3009 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 54,723 psi | 86% | 2959 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 55,709 psi | 87% | 3058 fps | 97.4% |
| ADI Benchmark 8208 | <<locked>> | 82% | 55,840 psi | 88% | 2953 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 57,406 psi | 90% | 2920 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 57,276 psi | 90% | 3140 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 55,869 psi | 88% | 3058 fps | 97.5% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 55,869 psi | 88% | 3058 fps | 97.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 55,216 psi | 87% | 2982 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 55,738 psi | 87% | 3009 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 55,390 psi | 87% | 3084 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 56,652 psi | 89% | 3114 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 55,027 psi | 86% | 3048 fps | 97.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 48,283 psi | 76% | 2976 fps | 96.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 45,629 psi | 72% | 2927 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 39,958 psi | 63% | 2828 fps | 97.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 52,112 psi | 82% | 3120 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 57,116 psi | 90% | 3025 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 56,188 psi | 88% | 2999 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 48,283 psi | 76% | 2976 fps | 96.1% |
| Bofors RP7 | <<locked>> | 92% | 55,811 psi | 87% | 2976 fps | 98.3% |
| Hodgdon Benchmark | <<locked>> | 82% | 57,000 psi | 89% | 2927 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 55,854 psi | 88% | 2986 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 56,710 psi | 89% | 3015 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 94% | 57,043 psi | 89% | 3077 fps | 99% |
| Hodgdon H4350 | <<locked>> | 92% | 57,217 psi | 90% | 3038 fps | 98% |
| Hodgdon H4895 | <<locked>> | 82% | 54,230 psi | 85% | 2963 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 55,651 psi | 87% | 3005 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 53,983 psi | 85% | 2995 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 57,406 psi | 90% | 3117 fps | 98.8% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,984 psi | 56% | 1850 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 55,463 psi | 87% | 2969 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 54,708 psi | 86% | 2946 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 57,667 psi | 90% | 2992 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 57,029 psi | 89% | 2972 fps | 98.8% |
| IMR 4350 | <<locked>> | 96% | 56,536 psi | 89% | 3009 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 92% | 57,305 psi | 90% | 3005 fps | 98.8% |
| IMR 4831 | <<locked>> | 96% | 54,926 psi | 86% | 3015 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 57,203 psi | 90% | 3038 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 55,840 psi | 88% | 2953 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 57,406 psi | 90% | 2979 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 56,217 psi | 88% | 2930 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 54,201 psi | 85% | 2933 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 57,188 psi | 90% | 2999 fps | 99.6% |
| Lovex S070 | <<locked>> | 94% | 55,085 psi | 86% | 2989 fps | 98.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 40,379 psi | 63% | 2746 fps | 96.6% |
| Norma 201 | <<locked>> | 84% | 55,941 psi | 88% | 2949 fps | 100% |
| Norma 202 | <<locked>> | 84% | 56,565 psi | 89% | 2949 fps | 100% |
| Norma 203B | <<locked>> | 86% | 54,998 psi | 86% | 2992 fps | 100% |
| Norma 204 | <<locked>> | 96% | 57,348 psi | 90% | 3061 fps | 97.5% |
| Norma MRPᴾ | <<locked>> | 100% | 51,329 psi | 80% | 3071 fps | 98.2% |
| Norma URP | <<locked>> | 96% | 56,811 psi | 89% | 3061 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 55,405 psi | 87% | 3015 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 55,840 psi | 88% | 3064 fps | 99.4% |
| Ramshot TAC | <<locked>> | 82% | 55,869 psi | 88% | 2976 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 82% | 56,072 psi | 88% | 2992 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,622 psi | 57% | 1893 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 56,652 psi | 89% | 2995 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 56,492 psi | 89% | 3074 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 56,362 psi | 88% | 3110 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 54,288 psi | 85% | 3048 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 57,130 psi | 90% | 3136 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 56,724 psi | 89% | 2927 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 56,449 psi | 88% | 2949 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 56,043 psi | 88% | 2992 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 57,464 psi | 90% | 3028 fps | 96.6% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 53,853 psi | 84% | 3028 fps | 97.3% |
| Rottweil R 907 | <<locked>> | 92% | 55,811 psi | 87% | 2976 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 94% | 57,188 psi | 90% | 2999 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 84% | 57,406 psi | 90% | 2979 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 54,201 psi | 85% | 2933 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 55,085 psi | 86% | 2989 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 57,653 psi | 90% | 3054 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 54,607 psi | 86% | 2953 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 55,593 psi | 87% | 2976 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 57,029 psi | 89% | 2881 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 57,653 psi | 90% | 2881 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 57,334 psi | 90% | 2953 fps | 98.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 53,359 psi | 84% | 3022 fps | 97.2% |
| Somchem S335 | <<locked>> | 84% | 56,550 psi | 89% | 2877 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 54,549 psi | 85% | 2943 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 56,217 psi | 88% | 2989 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 55,535 psi | 87% | 3061 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 54,505 psi | 85% | 3005 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 84% | 57,450 psi | 90% | 2864 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 56,565 psi | 89% | 2907 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 57,261 psi | 90% | 2927 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 57,624 psi | 90% | 2963 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 55,608 psi | 87% | 3005 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 47,253 psi | 74% | 2864 fps | 96.3% |
| Vihtavuori N530 | <<locked>> | 82% | 56,376 psi | 88% | 2953 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 55,245 psi | 87% | 2920 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 54,708 psi | 86% | 3009 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 50,981 psi | 80% | 3009 fps | 99.9% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 55,622 psi | 87% | 2976 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 56,855 psi | 89% | 3002 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 57,043 psi | 89% | 3077 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 41,075 psi | 64% | 2966 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 55,622 psi | 87% | 2986 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 51,401 psi | 81% | 2943 fps | 96.5% |
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% | 54,476 psi | 85% | 2844 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 47,282 psi | 74% | 2776 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 45,890 psi | 72% | 2762 fps | 96.1% |
| Accurate 3100 | <<locked>> | 92% | 36,825 psi | 58% | 2667 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 44,715 psi | 70% | 2776 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 33,576 psi | 53% | 2612 fps | 96.1% |
| Accurate High Country | <<locked>> | 98% | 49,458 psi | 78% | 3038 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 50,314 psi | 79% | 2900 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 42,873 psi | 67% | 2746 fps | 99% |
| ADI AR 2209 | <<locked>> | 94% | 45,977 psi | 72% | 2881 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 52,388 psi | 82% | 2900 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 54,041 psi | 85% | 2877 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 46,514 psi | 73% | 2953 fps | 99.6% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 45,832 psi | 72% | 2877 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 45,832 psi | 72% | 2877 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 42,830 psi | 67% | 2769 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 45,919 psi | 72% | 2838 fps | 99.5% |
| Alliant Reloder-16 | 34.5 gr | 80% | 33,373 psi | 52% | 2621 fps | 96.2% |
| Alliant Reloder-17 | <<locked>> | 80% | 37,318 psi | 58% | 2753 fps | 99% |
| Alliant Reloder-19 | <<locked>> | 94% | 45,252 psi | 71% | 2871 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 98% | 45,484 psi | 71% | 2920 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 84% | 27,557 psi | 43% | 2474 fps | 95.1% |
| Alliant Reloder-25 | <<locked>> | 96% | 35,404 psi | 55% | 2710 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 88% | 33,837 psi | 53% | 2717 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,951 psi | 78% | 2910 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 43,004 psi | 67% | 2779 fps | 99.8% |
| Bofors RP5 | <<locked>> | 98% | 45,484 psi | 71% | 2920 fps | 95.3% |
| Bofors RP7 | <<locked>> | 84% | 43,366 psi | 68% | 2749 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 53,940 psi | 85% | 2884 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 51,996 psi | 81% | 2927 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 43,613 psi | 68% | 2785 fps | 98.4% |
| Hodgdon H414 | <<locked>> | 84% | 41,017 psi | 64% | 2782 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 84% | 44,193 psi | 69% | 2805 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 50,821 psi | 80% | 2907 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 30,893 psi | 48% | 2520 fps | 97% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 47,340 psi | 74% | 2887 fps | 100% |
| Hodgdon Superformance | 42.2 gr | 86% | 43,047 psi | 67% | 2854 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,789 psi | 42% | 1650 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 48,704 psi | 76% | 2858 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 51,111 psi | 80% | 2894 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,049 psi | 71% | 2782 fps | 99.4% |
| IMR 4166 Enduron | <<locked>> | 80% | 47,471 psi | 74% | 2808 fps | 97.3% |
| IMR 4350 | <<locked>> | 86% | 41,321 psi | 65% | 2730 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 39,653 psi | 62% | 2674 fps | 95% |
| IMR 4831 | <<locked>> | 80% | 32,561 psi | 51% | 2569 fps | 95.8% |
| IMR 4895 | <<locked>> | 80% | 47,050 psi | 74% | 2867 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 80% | 52,388 psi | 82% | 2900 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 50,314 psi | 79% | 2874 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 49,516 psi | 78% | 2825 fps | 99.9% |
| Lovex S062 | <<locked>> | 80% | 44,962 psi | 70% | 2779 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 37,072 psi | 58% | 2618 fps | 95.8% |
| Lovex S070 | <<locked>> | 84% | 40,219 psi | 63% | 2710 fps | 95.6% |
| Lovex S071 | <<locked>> | 98% | 37,681 psi | 59% | 2687 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 49,124 psi | 77% | 2841 fps | 100% |
| Norma 202 | <<locked>> | 80% | 49,661 psi | 78% | 2844 fps | 100% |
| Norma 203B | <<locked>> | 80% | 45,295 psi | 71% | 2825 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 46,557 psi | 73% | 2874 fps | 95.1% |
| Norma MRP | <<locked>> | 94% | 41,655 psi | 65% | 2874 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 33,605 psi | 53% | 2608 fps | 96% |
| Ramshot Big Game | <<locked>> | 80% | 45,223 psi | 71% | 2841 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 84% | 37,420 psi | 59% | 2710 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 52,489 psi | 82% | 2920 fps | 99.2% |
| Ramshot Wild Boar | <<locked>> | 80% | 52,257 psi | 82% | 2936 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,427 psi | 43% | 1696 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 43,627 psi | 68% | 2762 fps | 97% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 49,342 psi | 77% | 2956 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 39,668 psi | 62% | 2815 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 33,257 psi | 52% | 2621 fps | 95.6% |
| ReloadSwiss RS 70 | 38.7 gr | 82% | 35,288 psi | 55% | 2690 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 53,229 psi | 83% | 2874 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 46,789 psi | 73% | 2795 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 40,379 psi | 63% | 2720 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 96% | 50,734 psi | 80% | 2917 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 94% | 44,150 psi | 69% | 2854 fps | 95% |
| Rottweil R 907 | <<locked>> | 84% | 43,366 psi | 68% | 2749 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 37,072 psi | 58% | 2618 fps | 95.8% |
| Shooters World Match Rifle | <<locked>> | 80% | 50,314 psi | 79% | 2874 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,962 psi | 70% | 2779 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 40,219 psi | 63% | 2710 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 41,553 psi | 65% | 2776 fps | 99.2% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 51,169 psi | 80% | 2897 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 48,950 psi | 77% | 2867 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 50,343 psi | 79% | 2782 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 42,308 psi | 66% | 2648 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 38,914 psi | 61% | 2618 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 46,847 psi | 73% | 2907 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 49,879 psi | 78% | 2779 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 50,821 psi | 80% | 2887 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 40,857 psi | 64% | 2720 fps | 99.4% |
| Somchem S365 | <<locked>> | 80% | 30,211 psi | 47% | 2559 fps | 98.2% |
| Somchem S385 | <<locked>> | 92% | 42,163 psi | 66% | 2779 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 50,792 psi | 80% | 2769 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 46,934 psi | 74% | 2766 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 47,137 psi | 74% | 2776 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 39,015 psi | 61% | 2651 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 35,041 psi | 55% | 2612 fps | 96.5% |
| Vihtavuori N165 | <<locked>> | 98% | 44,179 psi | 69% | 2808 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 52,794 psi | 83% | 2897 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 45,643 psi | 72% | 2769 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 34,635 psi | 54% | 2612 fps | 96.1% |
| Vihtavuori N555 | <<locked>> | 84% | 30,066 psi | 47% | 2556 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 34,505 psi | 54% | 2582 fps | 98.4% |
| Winchester 748 | <<locked>> | 80% | 53,258 psi | 83% | 2949 fps | 100% |
| Winchester 760 | <<locked>> | 84% | 41,017 psi | 64% | 2782 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 88% | 27,615 psi | 43% | 2556 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 48,559 psi | 76% | 2871 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 47,921 psi | 75% | 2881 fps | 95.7% |
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 107 powders for .243 WSSM loaded with the .243 | 100gr | Berger BT Target. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,140 fps; across all powders the maximum-charge window runs from 1,850 fps to 3,140 fps. Accurate 3100 gives the best case fill at 100 %, and 107 of the 107 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 100.0 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, ADI AR 2209 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, Hodgdon Superformance rank at the top here: for .243 WSSM with the .243 | 100gr | Berger BT Target 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.