Load Specifications
Bullet Manufacturer:Nosler
Bullet Weight:107 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 | 107gr | Nosler Custom Competition bullet and 106 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-17 and ReloadSwiss RS 60.
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% | 56,072 psi | 88% | 2802 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 57,624 psi | 90% | 2871 fps | 98.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,560 psi | 79% | 2848 fps | 99.1% |
| Accurate 4064 | <<locked>> | 86% | 56,115 psi | 88% | 2854 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 56,739 psi | 89% | 2959 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 55,288 psi | 87% | 3048 fps | 97.2% |
| ADI AR 2206H | <<locked>> | 82% | 55,390 psi | 87% | 2884 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,565 psi | 89% | 2890 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 54,099 psi | 85% | 2943 fps | 97.7% |
| ADI Benchmark 8208 | <<locked>> | 82% | 57,580 psi | 90% | 2877 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,854 psi | 88% | 3015 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 57,682 psi | 90% | 2995 fps | 98.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 57,232 psi | 90% | 2910 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 57,363 psi | 90% | 2933 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 57,392 psi | 90% | 3015 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 55,100 psi | 86% | 2989 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 56,826 psi | 89% | 2986 fps | 98.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,415 psi | 79% | 2930 fps | 97.3% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,645 psi | 75% | 2871 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,611 psi | 65% | 2785 fps | 98.3% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,505 psi | 85% | 3064 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 55,216 psi | 87% | 2900 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,412 psi | 73% | 2854 fps | 96.2% |
| Bofors RP3 | <<locked>> | 86% | 54,273 psi | 85% | 2874 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,415 psi | 79% | 2930 fps | 97.3% |
| Bofors RP7 | <<locked>> | 92% | 57,450 psi | 90% | 2910 fps | 99% |
| Hodgdon BL-C2 | <<locked>> | 82% | 57,508 psi | 90% | 2910 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 55,129 psi | 86% | 2897 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 92% | 55,448 psi | 87% | 2959 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 90% | 55,390 psi | 87% | 2917 fps | 98.2% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 55,709 psi | 87% | 2936 fps | 96.1% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 54,433 psi | 85% | 2920 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 82% | 55,985 psi | 88% | 2894 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 54,012 psi | 85% | 2884 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 56,101 psi | 88% | 2930 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,535 psi | 87% | 2995 fps | 99% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,318 psi | 57% | 1788 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 56,855 psi | 89% | 2890 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 56,608 psi | 89% | 2867 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,854 psi | 88% | 2867 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 55,216 psi | 87% | 2851 fps | 99% |
| IMR 4350 | <<locked>> | 94% | 54,766 psi | 86% | 2890 fps | 98.7% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,651 psi | 87% | 2887 fps | 99% |
| IMR 4831 | <<locked>> | 96% | 57,043 psi | 89% | 2949 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 55,492 psi | 87% | 2913 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 57,363 psi | 90% | 2930 fps | 96.7% |
| IMR 8208 XBR | <<locked>> | 82% | 57,580 psi | 90% | 2877 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,753 psi | 87% | 2858 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,215 psi | 85% | 2805 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 56,043 psi | 88% | 2864 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,738 psi | 87% | 2884 fps | 99.7% |
| Lovex S070 | <<locked>> | 94% | 56,942 psi | 89% | 2923 fps | 99.4% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,235 psi | 66% | 2700 fps | 97.7% |
| Norma 201 | <<locked>> | 84% | 57,711 psi | 90% | 2877 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,737 psi | 86% | 2822 fps | 100% |
| Norma 203B | <<locked>> | 86% | 56,579 psi | 89% | 2917 fps | 100% |
| Norma 204 | <<locked>> | 94% | 55,651 psi | 87% | 2943 fps | 97.9% |
| Norma MRPᴾ | <<locked>> | 100% | 53,403 psi | 84% | 3015 fps | 99% |
| Norma URP | <<locked>> | 94% | 55,521 psi | 87% | 2946 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 57,725 psi | 90% | 2949 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 54,404 psi | 85% | 2949 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 43,801 psi | 69% | 2782 fps | 96.2% |
| Ramshot TAC | <<locked>> | 82% | 57,740 psi | 90% | 2910 fps | 99.9% |
| Ramshot Wild Boar | <<locked>> | 82% | 57,667 psi | 90% | 2920 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,999 psi | 58% | 1831 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,766 psi | 86% | 2874 fps | 99.4% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,940 psi | 86% | 2949 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,708 psi | 86% | 2986 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 56,695 psi | 89% | 2986 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 55,259 psi | 87% | 3012 fps | 100% |
| Rottweil R 902 | <<locked>> | 84% | 54,955 psi | 86% | 2831 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 54,534 psi | 85% | 2874 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 56,173 psi | 88% | 2920 fps | 97% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,130 psi | 88% | 2972 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 92% | 57,450 psi | 90% | 2910 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,738 psi | 87% | 2884 fps | 99.7% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,753 psi | 87% | 2858 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 56,043 psi | 88% | 2864 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 56,942 psi | 89% | 2923 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 56,275 psi | 88% | 2933 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,594 psi | 89% | 2890 fps | 99.9% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 57,522 psi | 90% | 2910 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 55,201 psi | 87% | 2759 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,709 psi | 87% | 2756 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 55,303 psi | 87% | 2831 fps | 99% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,637 psi | 87% | 2969 fps | 98.2% |
| Somchem S335 | <<locked>> | 82% | 54,607 psi | 86% | 2753 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 56,173 psi | 88% | 2874 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 54,636 psi | 86% | 2871 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 54,505 psi | 85% | 2946 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 56,855 psi | 89% | 2949 fps | 98.9% |
| Vihtavuori N133 | <<locked>> | 82% | 55,695 psi | 87% | 2740 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 55,056 psi | 86% | 2785 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 55,477 psi | 87% | 2805 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 56,043 psi | 88% | 2844 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 57,638 psi | 90% | 2936 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,921 psi | 77% | 2808 fps | 97.3% |
| Vihtavuori N540 | <<locked>> | 86% | 57,232 psi | 90% | 2851 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 56,753 psi | 89% | 2943 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,359 psi | 84% | 2949 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 53,896 psi | 84% | 2999 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 57,406 psi | 90% | 2907 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,448 psi | 87% | 2959 fps | 99.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,047 psi | 67% | 2923 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,722 psi | 84% | 2858 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,258 psi | 83% | 2884 fps | 97.5% |
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 2495 | <<locked>> | 80% | 49,284 psi | 77% | 2707 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,079 psi | 74% | 2700 fps | 97.1% |
| Accurate 3100 | <<locked>> | 88% | 33,663 psi | 53% | 2516 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 46,673 psi | 73% | 2713 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,041 psi | 55% | 2562 fps | 97.4% |
| Accurate High Country | <<locked>> | 96% | 48,095 psi | 75% | 2923 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 51,909 psi | 81% | 2831 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,179 psi | 69% | 2684 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 92% | 44,512 psi | 70% | 2769 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 53,969 psi | 85% | 2825 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,356 psi | 76% | 2890 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 44,788 psi | 70% | 2776 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,614 psi | 70% | 2710 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,442 psi | 74% | 2776 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,505 psi | 54% | 2572 fps | 97.4% |
| Alliant Reloder-17 | 36.5 gr | 80% | 38,827 psi | 61% | 2700 fps | 99.6% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,251 psi | 69% | 2766 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 44,034 psi | 69% | 2808 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 82% | 26,861 psi | 42% | 2382 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,461 psi | 54% | 2608 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 86% | 32,764 psi | 51% | 2612 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,764 psi | 81% | 2848 fps | 99.9% |
| Bofors RP15 | <<locked>> | 98% | 43,410 psi | 68% | 2795 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 44,599 psi | 70% | 2717 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 44,034 psi | 69% | 2808 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 39,581 psi | 62% | 2585 fps | 95.2% |
| Hodgdon BL-C2 | <<locked>> | 80% | 53,867 psi | 84% | 2858 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 45,165 psi | 71% | 2726 fps | 99.1% |
| Hodgdon H414 | <<locked>> | 80% | 37,043 psi | 58% | 2608 fps | 95.1% |
| Hodgdon H4350 | <<locked>> | 82% | 42,902 psi | 67% | 2690 fps | 95.5% |
| Hodgdon H4831 | <<locked>> | 98% | 51,982 psi | 81% | 2877 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 98% | 50,850 psi | 80% | 2858 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 52,460 psi | 82% | 2838 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,068 psi | 50% | 2474 fps | 98.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,153 psi | 77% | 2825 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 38,870 psi | 61% | 2680 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,934 psi | 42% | 1594 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,227 psi | 79% | 2789 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,258 psi | 83% | 2822 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,456 psi | 73% | 2717 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,863 psi | 77% | 2746 fps | 98.1% |
| IMR 4350 | <<locked>> | 84% | 40,118 psi | 63% | 2621 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,901 psi | 64% | 2618 fps | 96.2% |
| IMR 4831 | <<locked>> | 80% | 33,881 psi | 53% | 2520 fps | 97% |
| IMR 4895 | <<locked>> | 80% | 48,660 psi | 76% | 2802 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 50,705 psi | 79% | 2822 fps | 95.2% |
| IMR 8208 XBR | <<locked>> | 80% | 53,969 psi | 85% | 2825 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 52,156 psi | 82% | 2805 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,213 psi | 80% | 2759 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,717 psi | 73% | 2717 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,551 psi | 60% | 2569 fps | 97% |
| Lovex S070 | <<locked>> | 80% | 36,564 psi | 57% | 2543 fps | 95.1% |
| Lovex S071 | <<locked>> | 94% | 34,708 psi | 54% | 2539 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 50,995 psi | 80% | 2779 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,605 psi | 81% | 2776 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,818 psi | 73% | 2759 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 45,397 psi | 71% | 2766 fps | 95.6% |
| Norma MRP | <<locked>> | 90% | 37,985 psi | 60% | 2707 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 34,954 psi | 55% | 2559 fps | 97.2% |
| Ramshot Big Game | <<locked>> | 80% | 47,021 psi | 74% | 2782 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 80% | 34,142 psi | 54% | 2546 fps | 95% |
| Ramshot Magnum | <<locked>> | 98% | 40,828 psi | 64% | 2720 fps | 95.2% |
| Ramshot TAC | <<locked>> | 80% | 54,244 psi | 85% | 2858 fps | 99.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 54,099 psi | 85% | 2867 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,615 psi | 43% | 1637 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,107 psi | 71% | 2707 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,300 psi | 80% | 2894 fps | 100% |
| ReloadSwiss RS 60 | 36.5 gr | 80% | 41,292 psi | 65% | 2756 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,809 psi | 55% | 2582 fps | 97% |
| ReloadSwiss RS 70 | 37.1 gr | 80% | 34,127 psi | 53% | 2582 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 48,530 psi | 76% | 2730 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,858 psi | 66% | 2661 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 49,110 psi | 77% | 2802 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 92% | 42,873 psi | 67% | 2743 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 39,581 psi | 62% | 2585 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,551 psi | 60% | 2569 fps | 97% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,156 psi | 82% | 2805 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,717 psi | 73% | 2717 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,564 psi | 57% | 2543 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,163 psi | 68% | 2717 fps | 99.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,997 psi | 83% | 2835 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,589 psi | 79% | 2805 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,648 psi | 81% | 2710 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,511 psi | 68% | 2579 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,652 psi | 59% | 2510 fps | 95.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 42,467 psi | 67% | 2733 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 51,619 psi | 81% | 2710 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,692 psi | 83% | 2822 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,583 psi | 67% | 2664 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 31,488 psi | 49% | 2516 fps | 99.1% |
| Somchem S385 | <<locked>> | 90% | 40,959 psi | 64% | 2671 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 52,127 psi | 82% | 2694 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,414 psi | 76% | 2694 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,617 psi | 76% | 2707 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,379 psi | 63% | 2592 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,405 psi | 57% | 2562 fps | 97.6% |
| Vihtavuori N165 | <<locked>> | 94% | 40,205 psi | 63% | 2644 fps | 95% |
| Vihtavuori N540 | <<locked>> | 80% | 47,152 psi | 74% | 2703 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,998 psi | 56% | 2566 fps | 97.3% |
| Vihtavuori N555 | <<locked>> | 82% | 29,356 psi | 46% | 2457 fps | 95.9% |
| Vihtavuori N560 | <<locked>> | 98% | 50,386 psi | 79% | 2940 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,839 psi | 56% | 2536 fps | 99.2% |
| Winchester 760 | <<locked>> | 80% | 37,333 psi | 59% | 2615 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 84% | 25,367 psi | 40% | 2402 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,314 psi | 79% | 2808 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 43,497 psi | 68% | 2713 fps | 95.2% |
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 106 powders for .243 WSSM loaded with the .243 | 107gr | Nosler Custom Competition. Alliant Reloder-26 delivers the highest muzzle velocity at 3,064 fps; across all powders the maximum-charge window runs from 1,788 fps to 3,064 fps. Accurate 3100 gives the best case fill at 100 %, and 106 of the 106 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 107.0 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, 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 70, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .243 WSSM with the .243 | 107gr | Nosler Custom Competition 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.