Load Specifications
Bullet Manufacturer:Berger
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:1:8.0
Load data in caliber .243 WSSM with .243 | 105gr | Berger Hybrid Target bullet and 104 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.
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>> | 84% | 55,332 psi | 87% | 2818 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 56,855 psi | 89% | 2887 fps | 98.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,038 psi | 78% | 2864 fps | 99% |
| Accurate 4064 | <<locked>> | 86% | 55,796 psi | 87% | 2877 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 56,246 psi | 88% | 2982 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 54,650 psi | 86% | 3064 fps | 96.9% |
| ADI AR 2206H | <<locked>> | 82% | 54,737 psi | 86% | 2900 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 55,883 psi | 88% | 2907 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 57,406 psi | 90% | 3022 fps | 98.1% |
| ADI Benchmark 8208 | <<locked>> | 82% | 56,927 psi | 89% | 2897 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,013 psi | 86% | 3031 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 57,188 psi | 90% | 3015 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 56,478 psi | 89% | 2930 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 56,985 psi | 89% | 2953 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 57,000 psi | 89% | 3038 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 54,215 psi | 85% | 3005 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 56,333 psi | 88% | 3005 fps | 98% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 49,951 psi | 78% | 2946 fps | 97% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 46,804 psi | 73% | 2884 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,249 psi | 65% | 2799 fps | 98.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 53,853 psi | 84% | 3081 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,868 psi | 86% | 2923 fps | 100% |
| Bofors RP3 | <<locked>> | 88% | 57,624 psi | 90% | 2949 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 49,951 psi | 78% | 2946 fps | 97% |
| Bofors RP7 | <<locked>> | 92% | 57,116 psi | 90% | 2933 fps | 98.8% |
| Hodgdon BL-C2 | <<locked>> | 82% | 57,174 psi | 90% | 2933 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 54,404 psi | 85% | 2910 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 92% | 54,549 psi | 85% | 2972 fps | 99% |
| Hodgdon H4350 | <<locked>> | 90% | 55,013 psi | 86% | 2936 fps | 98% |
| Hodgdon H4895 | <<locked>> | 82% | 55,317 psi | 87% | 2910 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 56,927 psi | 89% | 2953 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 55,347 psi | 87% | 2946 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,056 psi | 86% | 3015 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,100 psi | 57% | 1801 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 56,536 psi | 89% | 2913 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 55,869 psi | 88% | 2887 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,535 psi | 87% | 2890 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,969 psi | 86% | 2874 fps | 98.9% |
| IMR 4350 | <<locked>> | 96% | 57,580 psi | 90% | 2959 fps | 98.9% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,347 psi | 87% | 2907 fps | 98.9% |
| IMR 4831 | <<locked>> | 96% | 56,565 psi | 89% | 2969 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 54,810 psi | 86% | 2930 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 56,927 psi | 89% | 2946 fps | 96.4% |
| IMR 8208 XBR | <<locked>> | 82% | 56,927 psi | 89% | 2897 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,027 psi | 86% | 2874 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 57,159 psi | 90% | 2874 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 55,753 psi | 87% | 2887 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 54,955 psi | 86% | 2897 fps | 99.6% |
| Lovex S070 | <<locked>> | 94% | 56,159 psi | 88% | 2940 fps | 99.2% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,466 psi | 65% | 2710 fps | 97.4% |
| Norma 201 | <<locked>> | 84% | 57,000 psi | 89% | 2894 fps | 100% |
| Norma 202 | <<locked>> | 84% | 57,711 psi | 90% | 2890 fps | 100% |
| Norma 203B | <<locked>> | 86% | 56,260 psi | 88% | 2940 fps | 100% |
| Norma 204 | <<locked>> | 94% | 54,795 psi | 86% | 2956 fps | 97.5% |
| Norma MRPᴾ | <<locked>> | 100% | 52,823 psi | 83% | 3031 fps | 98.8% |
| Norma URP | <<locked>> | 94% | 54,694 psi | 86% | 2963 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 56,855 psi | 89% | 2963 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 57,159 psi | 90% | 3018 fps | 99.7% |
| Ramshot TAC | <<locked>> | 82% | 57,058 psi | 89% | 2923 fps | 99.8% |
| Ramshot Wild Boar | <<locked>> | 82% | 57,334 psi | 90% | 2943 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,753 psi | 58% | 1847 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,447 psi | 85% | 2894 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,157 psi | 85% | 2966 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 57,653 psi | 90% | 3054 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 55,724 psi | 87% | 2999 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,766 psi | 86% | 3031 fps | 99.9% |
| Rottweil R 901 | <<locked>> | 82% | 57,696 psi | 90% | 2867 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 57,566 psi | 90% | 2894 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 57,493 psi | 90% | 2943 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,347 psi | 87% | 2930 fps | 96.6% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 55,593 psi | 87% | 2992 fps | 98.1% |
| Rottweil R 907 | <<locked>> | 92% | 57,116 psi | 90% | 2933 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 92% | 54,955 psi | 86% | 2897 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,027 psi | 86% | 2874 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,753 psi | 87% | 2887 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 56,159 psi | 88% | 2940 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,434 psi | 87% | 2949 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 55,869 psi | 88% | 2907 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 56,797 psi | 89% | 2927 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,636 psi | 86% | 2779 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,477 psi | 87% | 2782 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,955 psi | 86% | 2851 fps | 98.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,085 psi | 86% | 2986 fps | 97.9% |
| Somchem S335 | <<locked>> | 84% | 57,551 psi | 90% | 2822 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,840 psi | 88% | 2897 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 57,551 psi | 90% | 2940 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 57,348 psi | 90% | 2927 fps | 96.2% |
| Somchem S365 | <<locked>> | 98% | 57,479 psi | 90% | 3015 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 56,304 psi | 88% | 2969 fps | 98.7% |
| Vihtavuori N133 | <<locked>> | 82% | 55,114 psi | 86% | 2762 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,375 psi | 85% | 2805 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 54,810 psi | 86% | 2822 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,303 psi | 87% | 2861 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 57,188 psi | 90% | 2959 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,486 psi | 76% | 2825 fps | 97.1% |
| Vihtavuori N530 | <<locked>> | 82% | 57,493 psi | 90% | 2897 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 56,478 psi | 89% | 2867 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 56,289 psi | 88% | 2966 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,388 psi | 82% | 2963 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 56,913 psi | 89% | 2927 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 54,984 psi | 86% | 2979 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,279 psi | 66% | 2933 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 56,956 psi | 89% | 2933 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 52,750 psi | 83% | 2904 fps | 97.3% |
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% | 48,646 psi | 76% | 2726 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,847 psi | 73% | 2720 fps | 96.8% |
| Accurate 3100 | <<locked>> | 90% | 35,476 psi | 56% | 2579 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 46,064 psi | 72% | 2730 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,751 psi | 54% | 2579 fps | 97.1% |
| Accurate High Country | <<locked>> | 96% | 47,543 psi | 75% | 2936 fps | 95.2% |
| ADI AR 2206H | <<locked>> | 80% | 51,663 psi | 81% | 2854 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,642 psi | 68% | 2697 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 92% | 44,193 psi | 69% | 2785 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 53,737 psi | 84% | 2851 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,659 psi | 75% | 2907 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 44,135 psi | 69% | 2785 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,063 psi | 69% | 2726 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,210 psi | 74% | 2795 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,055 psi | 53% | 2585 fps | 97.1% |
| Alliant Reloder-17 | 36.7 gr | 80% | 38,551 psi | 60% | 2717 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 92% | 43,598 psi | 68% | 2776 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 96% | 43,613 psi | 68% | 2822 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,658 psi | 42% | 2395 fps | 95.3% |
| Alliant Reloder-25 | <<locked>> | 94% | 33,968 psi | 53% | 2618 fps | 95.3% |
| Alliant Reloder-26 | <<locked>> | 86% | 32,460 psi | 51% | 2625 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,111 psi | 80% | 2861 fps | 99.9% |
| Bofors RP3 | <<locked>> | 80% | 44,005 psi | 69% | 2733 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 43,613 psi | 68% | 2822 fps | 95.3% |
| Bofors RP7 | <<locked>> | 82% | 41,771 psi | 65% | 2657 fps | 95.7% |
| Hodgdon BL-C2 | <<locked>> | 80% | 53,185 psi | 83% | 2874 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,570 psi | 70% | 2740 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 82% | 39,363 psi | 62% | 2684 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 82% | 42,366 psi | 66% | 2703 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 52,199 psi | 82% | 2861 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,618 psi | 50% | 2484 fps | 97.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,501 psi | 76% | 2838 fps | 100% |
| Hodgdon Superformance | 40.7 gr | 84% | 41,191 psi | 65% | 2753 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,050 psi | 42% | 1614 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,632 psi | 78% | 2805 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 52,591 psi | 82% | 2841 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 45,905 psi | 72% | 2733 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,327 psi | 76% | 2762 fps | 97.9% |
| IMR 4350 | <<locked>> | 84% | 39,610 psi | 62% | 2631 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,408 psi | 63% | 2628 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 33,402 psi | 52% | 2530 fps | 96.7% |
| IMR 4895 | <<locked>> | 80% | 48,399 psi | 76% | 2825 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 53,345 psi | 84% | 2890 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 53,737 psi | 84% | 2851 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 51,459 psi | 81% | 2822 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,676 psi | 79% | 2776 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,151 psi | 72% | 2733 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,058 psi | 60% | 2582 fps | 96.7% |
| Lovex S070 | <<locked>> | 82% | 38,551 psi | 60% | 2612 fps | 95.6% |
| Lovex S071 | <<locked>> | 94% | 34,142 psi | 54% | 2549 fps | 95% |
| Norma 201 | <<locked>> | 80% | 50,386 psi | 79% | 2795 fps | 100% |
| Norma 202 | <<locked>> | 80% | 50,966 psi | 80% | 2795 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,557 psi | 73% | 2782 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 44,730 psi | 70% | 2779 fps | 95.2% |
| Norma MRP | <<locked>> | 92% | 39,972 psi | 63% | 2779 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 34,737 psi | 54% | 2575 fps | 96.9% |
| Ramshot Big Game | <<locked>> | 80% | 46,383 psi | 73% | 2799 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 82% | 35,955 psi | 56% | 2615 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 53,621 psi | 84% | 2871 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 53,388 psi | 84% | 2884 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,427 psi | 43% | 1650 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,889 psi | 70% | 2726 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,575 psi | 79% | 2910 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,017 psi | 64% | 2779 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,243 psi | 54% | 2592 fps | 96.6% |
| ReloadSwiss RS 70 | 37.2 gr | 80% | 33,649 psi | 53% | 2592 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 80% | 54,462 psi | 85% | 2822 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 47,979 psi | 75% | 2749 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,640 psi | 65% | 2680 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 48,820 psi | 77% | 2822 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 92% | 42,511 psi | 67% | 2759 fps | 95% |
| Rottweil R 907 | <<locked>> | 82% | 41,771 psi | 65% | 2657 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,058 psi | 60% | 2582 fps | 96.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,459 psi | 81% | 2822 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,151 psi | 72% | 2733 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 38,551 psi | 60% | 2612 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,598 psi | 67% | 2733 fps | 99.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,330 psi | 82% | 2851 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 49,966 psi | 78% | 2818 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,459 psi | 81% | 2733 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,323 psi | 68% | 2602 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,173 psi | 58% | 2520 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 45,150 psi | 71% | 2812 fps | 95.8% |
| Somchem S335 | <<locked>> | 80% | 51,068 psi | 80% | 2730 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 51,967 psi | 81% | 2838 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,032 psi | 66% | 2680 fps | 99.7% |
| Somchem S361 | <<locked>> | 96% | 53,751 psi | 84% | 2871 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 31,256 psi | 49% | 2533 fps | 98.9% |
| Somchem S385 | <<locked>> | 90% | 40,625 psi | 64% | 2687 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 51,996 psi | 81% | 2717 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,196 psi | 76% | 2717 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,399 psi | 76% | 2730 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,147 psi | 63% | 2612 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,143 psi | 57% | 2579 fps | 97.3% |
| Vihtavuori N165 | <<locked>> | 96% | 42,293 psi | 66% | 2710 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 53,766 psi | 84% | 2844 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 46,601 psi | 73% | 2720 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,505 psi | 56% | 2575 fps | 96.9% |
| Vihtavuori N555 | <<locked>> | 82% | 28,863 psi | 45% | 2467 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,360 psi | 55% | 2549 fps | 99% |
| Winchester 760 | <<locked>> | 82% | 39,363 psi | 62% | 2684 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 86% | 26,672 psi | 42% | 2474 fps | 96% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,980 psi | 78% | 2828 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 45,803 psi | 72% | 2782 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 104 powders for .243 WSSM loaded with the .243 | 105gr | Berger Hybrid Target. Alliant Reloder-26 delivers the highest muzzle velocity at 3,081 fps; across all powders the maximum-charge window runs from 1,801 fps to 3,081 fps. Accurate 3100 gives the best case fill at 100 %, and 104 of the 104 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 1:8.0 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, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for .243 WSSM with the .243 | 105gr | Berger Hybrid 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.