Load Specifications
Bullet Manufacturer:Geco
Bullet Weight:105 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:1:11.0
Load data in caliber .243 WSSM with .243 | 105gr | Geco SOFTPOINT bullet and 102 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-26 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 2495 | <<locked>> | 82% | 54,607 psi | 86% | 2822 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 55,782 psi | 87% | 2887 fps | 98.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,127 psi | 83% | 2927 fps | 99.5% |
| Accurate 4064 | <<locked>> | 84% | 54,969 psi | 86% | 2877 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 55,666 psi | 87% | 2986 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 55,303 psi | 87% | 3068 fps | 96% |
| ADI AR 2206H | <<locked>> | 82% | 57,290 psi | 90% | 2953 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 55,071 psi | 86% | 2910 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 56,608 psi | 89% | 3025 fps | 98.3% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,041 psi | 85% | 3012 fps | 96.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 53,925 psi | 85% | 3028 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 56,478 psi | 89% | 3018 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 55,796 psi | 87% | 2930 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 55,927 psi | 88% | 2953 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,912 psi | 88% | 3035 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 53,708 psi | 84% | 3009 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 55,680 psi | 87% | 3009 fps | 98.2% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,837 psi | 83% | 3009 fps | 97.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,850 psi | 78% | 2943 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,627 psi | 68% | 2864 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 98% | 53,563 psi | 84% | 3087 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 57,145 psi | 90% | 2969 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,428 psi | 76% | 2930 fps | 96.9% |
| Bofors RP3 | <<locked>> | 86% | 56,391 psi | 88% | 2943 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,837 psi | 83% | 3009 fps | 97.9% |
| Bofors RP7 | <<locked>> | 90% | 55,970 psi | 88% | 2933 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 86% | 57,101 psi | 89% | 2966 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 53,940 psi | 85% | 2976 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 90% | 57,464 psi | 90% | 2992 fps | 98.6% |
| Hodgdon H4831 | <<locked>> | 98% | 54,302 psi | 85% | 2959 fps | 96% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 56,724 psi | 89% | 2999 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 56,652 psi | 89% | 2959 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,331 psi | 85% | 2943 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 54,027 psi | 85% | 3012 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,230 psi | 57% | 1824 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 55,477 psi | 87% | 2913 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,534 psi | 85% | 2890 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 57,145 psi | 90% | 2927 fps | 99.3% |
| IMR 4350 | <<locked>> | 94% | 56,666 psi | 89% | 2959 fps | 99% |
| IMR 4451 Enduron | <<locked>> | 90% | 57,348 psi | 90% | 2956 fps | 99.3% |
| IMR 4831 | <<locked>> | 94% | 55,869 psi | 88% | 2972 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 57,377 psi | 90% | 2979 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 56,057 psi | 88% | 2953 fps | 96.6% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,430 psi | 81% | 2979 fps | 96.1% |
| Lovex D073.6 | <<locked>> | 82% | 57,696 psi | 90% | 2923 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 56,072 psi | 88% | 2874 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 54,389 psi | 85% | 2881 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 57,464 psi | 90% | 2953 fps | 99.9% |
| Lovex S070 | <<locked>> | 92% | 55,434 psi | 87% | 2943 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,106 psi | 69% | 2769 fps | 98.2% |
| Norma 201 | <<locked>> | 82% | 56,028 psi | 88% | 2894 fps | 100% |
| Norma 202 | <<locked>> | 82% | 56,753 psi | 89% | 2890 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,216 psi | 87% | 2940 fps | 100% |
| Norma 204 | <<locked>> | 92% | 53,867 psi | 84% | 2956 fps | 97.7% |
| Norma MRPᴾ | <<locked>> | 100% | 56,217 psi | 88% | 3100 fps | 99.4% |
| Norma URP | <<locked>> | 94% | 57,740 psi | 90% | 3018 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 55,970 psi | 88% | 2963 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 51,706 psi | 81% | 2995 fps | 96.6% |
| Ramshot Hunter | <<locked>> | 94% | 56,623 psi | 89% | 3022 fps | 99.7% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,325 psi | 73% | 2871 fps | 97.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,898 psi | 58% | 1867 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 56,898 psi | 89% | 2946 fps | 99.6% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 56,956 psi | 89% | 3022 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 57,116 psi | 90% | 3058 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 55,390 psi | 87% | 3005 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 53,795 psi | 84% | 3031 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,467 psi | 67% | 2881 fps | 97% |
| Rottweil R 902 | <<locked>> | 84% | 56,507 psi | 89% | 2894 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 56,666 psi | 89% | 2943 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,723 psi | 86% | 2936 fps | 96.9% |
| Rottweil R 905 | <<locked>> | 98% | 55,056 psi | 86% | 2999 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 90% | 55,970 psi | 88% | 2933 fps | 98.9% |
| Shooters World Long Rifle | <<locked>> | 92% | 57,464 psi | 90% | 2953 fps | 99.9% |
| Shooters World Match Rifle | <<locked>> | 82% | 57,696 psi | 90% | 2923 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 54,389 psi | 85% | 2881 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 55,434 psi | 87% | 2943 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,607 psi | 86% | 2949 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 55,622 psi | 87% | 2923 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 56,536 psi | 89% | 2818 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 57,464 psi | 90% | 2822 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 57,276 psi | 90% | 2904 fps | 99.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,563 psi | 86% | 2992 fps | 98.1% |
| Somchem S335 | <<locked>> | 82% | 56,521 psi | 89% | 2822 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 56,318 psi | 88% | 2933 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 56,579 psi | 89% | 2933 fps | 96.4% |
| Somchem S365 | <<locked>> | 96% | 56,855 psi | 89% | 3015 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 55,651 psi | 87% | 2972 fps | 98.9% |
| Vihtavuori N133 | <<locked>> | 82% | 57,072 psi | 89% | 2802 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 56,898 psi | 89% | 2851 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 57,305 psi | 90% | 2867 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,375 psi | 85% | 2861 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 56,492 psi | 89% | 2959 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,242 psi | 80% | 2887 fps | 97.9% |
| Vihtavuori N540 | <<locked>> | 84% | 55,274 psi | 87% | 2864 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 55,492 psi | 87% | 2966 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,840 psi | 88% | 3022 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 56,536 psi | 89% | 3087 fps | 96.9% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 56,144 psi | 88% | 2927 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 54,331 psi | 85% | 2982 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,078 psi | 71% | 3002 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 55,724 psi | 87% | 2930 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,999 psi | 88% | 2969 fps | 98.1% |
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 2495 | <<locked>> | 80% | 51,169 psi | 80% | 2772 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,936 psi | 77% | 2776 fps | 97.6% |
| Accurate 3100 | <<locked>> | 88% | 35,273 psi | 55% | 2582 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 48,472 psi | 76% | 2779 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,840 psi | 58% | 2638 fps | 97.9% |
| Accurate MAGPRO | <<locked>> | 98% | 51,329 psi | 80% | 2999 fps | 95% |
| ADI AR 2206H | <<locked>> | 80% | 53,853 psi | 84% | 2900 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,672 psi | 72% | 2749 fps | 99.7% |
| ADI AR 2209 | <<locked>> | 90% | 43,424 psi | 68% | 2785 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 98% | 50,618 psi | 79% | 2949 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,140 psi | 79% | 2963 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 43,453 psi | 68% | 2785 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,224 psi | 72% | 2776 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,356 psi | 77% | 2848 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,868 psi | 56% | 2644 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,741 psi | 64% | 2776 fps | 99.9% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,946 psi | 67% | 2776 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 43,149 psi | 68% | 2825 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,368 psi | 41% | 2392 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,692 psi | 53% | 2621 fps | 95.6% |
| Alliant Reloder-26 | 41.4 gr | 84% | 32,198 psi | 50% | 2628 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,359 psi | 84% | 2913 fps | 100% |
| Bofors RP15 | <<locked>> | 96% | 42,554 psi | 67% | 2812 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 46,514 psi | 73% | 2789 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 43,149 psi | 68% | 2825 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 40,944 psi | 64% | 2654 fps | 95.8% |
| Hodgdon H380 | <<locked>> | 80% | 46,934 psi | 74% | 2799 fps | 99.4% |
| Hodgdon H414 | <<locked>> | 80% | 38,667 psi | 61% | 2680 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 80% | 41,771 psi | 65% | 2707 fps | 95.3% |
| Hodgdon H4831 | <<locked>> | 96% | 50,836 psi | 80% | 2900 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 98% | 53,127 psi | 83% | 2940 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,504 psi | 53% | 2539 fps | 98.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,010 psi | 80% | 2890 fps | 100% |
| Hodgdon Superformance | 41.7 gr | 82% | 40,567 psi | 64% | 2753 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,296 psi | 43% | 1634 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,764 psi | 81% | 2854 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,037 psi | 75% | 2785 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,198 psi | 79% | 2812 fps | 98.5% |
| IMR 4350 | <<locked>> | 82% | 39,044 psi | 61% | 2635 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,221 psi | 66% | 2684 fps | 96.7% |
| IMR 4831 | <<locked>> | 80% | 35,302 psi | 55% | 2585 fps | 97.6% |
| IMR 4895 | <<locked>> | 80% | 50,618 psi | 79% | 2874 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 49,197 psi | 77% | 2831 fps | 95% |
| IMR 7828 SSC | <<locked>> | 98% | 48,182 psi | 76% | 2920 fps | 95.2% |
| Lovex D073.6 | <<locked>> | 80% | 54,128 psi | 85% | 2874 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 52,750 psi | 83% | 2825 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,356 psi | 76% | 2782 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,943 psi | 63% | 2638 fps | 97.5% |
| Lovex S070 | <<locked>> | 80% | 38,159 psi | 60% | 2615 fps | 95.8% |
| Lovex S071 | <<locked>> | 92% | 34,243 psi | 54% | 2559 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 52,634 psi | 82% | 2844 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,287 psi | 84% | 2841 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,704 psi | 76% | 2831 fps | 100% |
| Norma 204 | <<locked>> | 86% | 44,063 psi | 69% | 2779 fps | 95.4% |
| Norma MRP | <<locked>> | 88% | 37,173 psi | 58% | 2720 fps | 95% |
| Norma URP | <<locked>> | 80% | 36,680 psi | 57% | 2631 fps | 97.8% |
| Ramshot Big Game | <<locked>> | 80% | 48,689 psi | 76% | 2848 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 48,327 psi | 76% | 2933 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 35,563 psi | 56% | 2615 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 96% | 39,827 psi | 62% | 2736 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,673 psi | 43% | 1673 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,659 psi | 73% | 2776 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,359 psi | 84% | 2966 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,279 psi | 68% | 2831 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,390 psi | 57% | 2651 fps | 97.5% |
| ReloadSwiss RS 70 | 39 gr | 80% | 35,375 psi | 55% | 2651 fps | 96.7% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,523 psi | 62% | 2808 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 49,879 psi | 78% | 2792 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,787 psi | 69% | 2733 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 48,182 psi | 76% | 2825 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 90% | 42,032 psi | 66% | 2759 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 40,944 psi | 64% | 2654 fps | 95.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,943 psi | 63% | 2638 fps | 97.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 54,128 psi | 85% | 2874 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 48,356 psi | 76% | 2782 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,159 psi | 60% | 2615 fps | 95.8% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,889 psi | 70% | 2785 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,344 psi | 82% | 2871 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,417 psi | 84% | 2776 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,150 psi | 71% | 2641 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,870 psi | 61% | 2572 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 41,640 psi | 65% | 2753 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 53,185 psi | 83% | 2772 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,106 psi | 69% | 2733 fps | 99.9% |
| Somchem S361 | <<locked>> | 94% | 52,852 psi | 83% | 2871 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 33,127 psi | 52% | 2589 fps | 99.5% |
| Somchem S385 | <<locked>> | 88% | 40,190 psi | 63% | 2690 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 53,969 psi | 85% | 2759 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,343 psi | 79% | 2759 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,546 psi | 79% | 2772 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,119 psi | 66% | 2661 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,058 psi | 60% | 2631 fps | 98.1% |
| Vihtavuori N165 | <<locked>> | 94% | 42,163 psi | 66% | 2720 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 48,878 psi | 77% | 2769 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,579 psi | 59% | 2635 fps | 97.8% |
| Vihtavuori N555 | <<locked>> | 80% | 28,718 psi | 45% | 2467 fps | 95.6% |
| Vihtavuori N560 | <<locked>> | 96% | 49,342 psi | 77% | 2959 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,028 psi | 58% | 2595 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 38,914 psi | 61% | 2687 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,339 psi | 41% | 2474 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,011 psi | 82% | 2874 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 42,192 psi | 66% | 2726 fps | 95% |
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 102 powders for .243 WSSM loaded with the .243 | 105gr | Geco SOFTPOINT. Norma MRP delivers the highest muzzle velocity at 3,100 fps; across all powders the maximum-charge window runs from 1,824 fps to 3,100 fps. Accurate 3100 gives the best case fill at 100 %, and 102 of the 102 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 105.0 gr projectile in 0.243" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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-26, Hodgdon Superformance rank at the top here: for .243 WSSM with the .243 | 105gr | Geco SOFTPOINT 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.