Load Specifications
Bullet:.243 | 77gr | Lapua Open Tip
Bullet Manufacturer:Lapua
Bullet Weight:105 gr
Bullet Diameter:0.243"
Bullet Length:<<locked>>
Caliber:6 mm XC load data
Case Length (l3):1.901"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:49.7 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 6 mm XC with .243 | 77gr | Lapua Open Tip 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, 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 2015 | <<locked>> | 82% | 55,956 psi | 88% | 2789 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,434 psi | 87% | 2818 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 56,565 psi | 89% | 2884 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 57,145 psi | 90% | 2877 fps | 98.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,774 psi | 72% | 2785 fps | 97.7% |
| Accurate 4064 | <<locked>> | 88% | 55,535 psi | 87% | 2871 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 55,651 psi | 87% | 2969 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 84% | 55,114 psi | 86% | 2897 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 56,188 psi | 88% | 2900 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,359 psi | 84% | 2940 fps | 96.6% |
| ADI Benchmark 8208 | <<locked>> | 84% | 57,406 psi | 90% | 2894 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,434 psi | 87% | 2818 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 54,766 psi | 86% | 3022 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 52,997 psi | 83% | 2936 fps | 96.7% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 52,997 psi | 83% | 2936 fps | 96.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 56,594 psi | 89% | 2923 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 57,159 psi | 90% | 2949 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 56,159 psi | 88% | 3018 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 57,653 psi | 90% | 3054 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,214 psi | 82% | 2930 fps | 96.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,221 psi | 68% | 2812 fps | 99.8% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 38,116 psi | 60% | 2710 fps | 96.1% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,863 psi | 77% | 2992 fps | 99.5% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,752 psi | 86% | 2913 fps | 99.9% |
| Bofors RP3 | <<locked>> | 90% | 57,406 psi | 90% | 2943 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 56,927 psi | 89% | 2913 fps | 98.2% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,637 psi | 87% | 2828 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 57,377 psi | 90% | 2933 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,230 psi | 85% | 2900 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 94% | 54,186 psi | 85% | 2959 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 92% | 54,636 psi | 86% | 2920 fps | 97.3% |
| Hodgdon H4895 | <<locked>> | 84% | 55,680 psi | 87% | 2907 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 56,550 psi | 89% | 2946 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,419 psi | 87% | 2943 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,795 psi | 86% | 3002 fps | 98.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,839 psi | 56% | 1772 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 56,782 psi | 89% | 2910 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 55,869 psi | 88% | 2884 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,709 psi | 87% | 2884 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,376 psi | 87% | 2864 fps | 98.5% |
| IMR 4350 | <<locked>> | 98% | 57,638 psi | 90% | 2949 fps | 98.4% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,521 psi | 87% | 2897 fps | 98.4% |
| IMR 4831 | <<locked>> | 98% | 55,753 psi | 87% | 2953 fps | 99.9% |
| IMR 4895 | <<locked>> | 86% | 54,766 psi | 86% | 2920 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 57,406 psi | 90% | 2894 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 55,347 psi | 87% | 2874 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 54,549 psi | 85% | 2825 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 55,782 psi | 87% | 2881 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,027 psi | 86% | 2887 fps | 99.3% |
| Lovex S070 | <<locked>> | 96% | 55,898 psi | 88% | 2927 fps | 98.7% |
| Norma 201 | <<locked>> | 86% | 57,522 psi | 90% | 2894 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,302 psi | 85% | 2838 fps | 100% |
| Norma 203B | <<locked>> | 88% | 56,391 psi | 88% | 2936 fps | 100% |
| Norma 204 | <<locked>> | 96% | 54,766 psi | 86% | 2943 fps | 96.8% |
| Norma MRPᴾ | <<locked>> | 100% | 48,472 psi | 76% | 2943 fps | 97.3% |
| Norma URP | <<locked>> | 98% | 57,682 psi | 90% | 3002 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 88% | 56,797 psi | 89% | 2959 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 56,594 psi | 89% | 3002 fps | 99.3% |
| Ramshot TAC | <<locked>> | 84% | 57,609 psi | 90% | 2923 fps | 99.6% |
| Ramshot Wild Boar | <<locked>> | 84% | 57,653 psi | 90% | 2940 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,506 psi | 57% | 1818 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,462 psi | 85% | 2884 fps | 98.8% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 53,940 psi | 85% | 2959 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 57,595 psi | 90% | 3054 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 55,347 psi | 87% | 2992 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,012 psi | 85% | 3012 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 82% | 54,926 psi | 86% | 2822 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 54,679 psi | 86% | 2844 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 57,246 psi | 90% | 2933 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 54,984 psi | 86% | 2910 fps | 95.7% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,213 psi | 80% | 2910 fps | 96.5% |
| Rottweil R 907 | <<locked>> | 94% | 56,927 psi | 89% | 2913 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,027 psi | 86% | 2887 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 84% | 55,347 psi | 87% | 2874 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,782 psi | 87% | 2881 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 55,898 psi | 88% | 2927 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,303 psi | 87% | 2943 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 56,231 psi | 88% | 2900 fps | 99.7% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 57,087 psi | 89% | 2923 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,027 psi | 86% | 2776 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,724 psi | 87% | 2779 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 54,955 psi | 86% | 2838 fps | 98.4% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,734 psi | 80% | 2904 fps | 96.4% |
| Somchem S335 | <<locked>> | 84% | 54,824 psi | 86% | 2779 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 55,767 psi | 87% | 2887 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 57,392 psi | 90% | 2930 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 56,405 psi | 88% | 3005 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 52,127 psi | 82% | 2894 fps | 97.5% |
| Vihtavuori N133 | <<locked>> | 84% | 55,419 psi | 87% | 2759 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 54,476 psi | 85% | 2802 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 54,839 psi | 86% | 2818 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,259 psi | 87% | 2854 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 56,884 psi | 89% | 2949 fps | 99.9% |
| Vihtavuori N530 | <<locked>> | 82% | 54,186 psi | 85% | 2841 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 56,463 psi | 88% | 2864 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 55,637 psi | 87% | 2949 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,109 psi | 75% | 2890 fps | 99.7% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 56,782 psi | 89% | 2920 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,810 psi | 86% | 2894 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 54,578 psi | 86% | 2963 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 39,015 psi | 61% | 2841 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 86% | 57,290 psi | 90% | 2933 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% | 52,562 psi | 82% | 2740 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,397 psi | 71% | 2671 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 52,721 psi | 83% | 2828 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 44,193 psi | 69% | 2654 fps | 95.4% |
| Accurate 3100 | <<locked>> | 94% | 37,231 psi | 58% | 2612 fps | 95.3% |
| Accurate 4064 | <<locked>> | 80% | 42,975 psi | 67% | 2671 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 32,140 psi | 50% | 2507 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 48,791 psi | 76% | 2795 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 80% | 41,394 psi | 65% | 2638 fps | 98.6% |
| ADI AR 2209 | <<locked>> | 98% | 50,096 psi | 79% | 2884 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,908 psi | 80% | 2795 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,924 psi | 81% | 2769 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,614 psi | 70% | 2835 fps | 99.2% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 46,847 psi | 73% | 2825 fps | 95.1% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 46,847 psi | 73% | 2825 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,292 psi | 65% | 2661 fps | 99.6% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,425 psi | 70% | 2733 fps | 99.2% |
| Alliant Reloder-16 | <<locked>> | 80% | 32,126 psi | 50% | 2516 fps | 95.4% |
| Alliant Reloder-17 | 34.7 gr | 80% | 35,911 psi | 56% | 2644 fps | 98.5% |
| Alliant Reloder-19 | <<locked>> | 96% | 46,224 psi | 72% | 2815 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 86% | 28,123 psi | 44% | 2428 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 98% | 35,882 psi | 56% | 2651 fps | 95% |
| Alliant Reloder-26 | <<locked>> | 90% | 34,403 psi | 54% | 2667 fps | 95.6% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 48,182 psi | 76% | 2802 fps | 99.4% |
| Bofors RP3 | <<locked>> | 80% | 41,220 psi | 65% | 2671 fps | 99.6% |
| Bofors RP7 | <<locked>> | 84% | 41,930 psi | 66% | 2644 fps | 95% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,996 psi | 81% | 2772 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,980 psi | 78% | 2818 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,959 psi | 66% | 2677 fps | 97.9% |
| Hodgdon H414 | <<locked>> | 86% | 41,872 psi | 66% | 2730 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 86% | 45,179 psi | 71% | 2749 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 49,298 psi | 77% | 2805 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,617 psi | 46% | 2415 fps | 96.3% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,281 psi | 71% | 2776 fps | 99.9% |
| Hodgdon Superformance | 40.3 gr | 88% | 44,063 psi | 69% | 2802 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,672 psi | 42% | 1581 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,862 psi | 73% | 2749 fps | 99.9% |
| IMR 3031 | <<locked>> | 80% | 49,124 psi | 77% | 2785 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,511 psi | 68% | 2674 fps | 99.1% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,890 psi | 72% | 2697 fps | 96.7% |
| IMR 4350 | <<locked>> | 88% | 42,264 psi | 66% | 2677 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 82% | 40,843 psi | 64% | 2621 fps | 95.2% |
| IMR 4831 | <<locked>> | 82% | 33,301 psi | 52% | 2520 fps | 95.9% |
| IMR 4895 | <<locked>> | 80% | 45,527 psi | 71% | 2762 fps | 99.6% |
| IMR 8208 XBR | <<locked>> | 80% | 50,908 psi | 80% | 2795 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,486 psi | 76% | 2769 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,356 psi | 76% | 2723 fps | 99.8% |
| Lovex S062 | <<locked>> | 80% | 43,656 psi | 68% | 2677 fps | 99.9% |
| Lovex S065 | <<locked>> | 80% | 35,708 psi | 56% | 2513 fps | 95.1% |
| Lovex S070 | <<locked>> | 86% | 40,944 psi | 64% | 2651 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 47,500 psi | 74% | 2736 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,008 psi | 75% | 2743 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,787 psi | 69% | 2720 fps | 99.4% |
| Norma 204 | <<locked>> | 92% | 47,543 psi | 75% | 2818 fps | 95.1% |
| Norma MRP | <<locked>> | 96% | 42,395 psi | 66% | 2822 fps | 95.6% |
| Norma URP | <<locked>> | 80% | 32,285 psi | 51% | 2503 fps | 95.3% |
| Ramshot Big Game | <<locked>> | 80% | 43,395 psi | 68% | 2733 fps | 99.3% |
| Ramshot Hunter | <<locked>> | 86% | 38,232 psi | 60% | 2657 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 50,459 psi | 79% | 2805 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,386 psi | 79% | 2828 fps | 99.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,354 psi | 43% | 1627 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,148 psi | 66% | 2661 fps | 96.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,079 psi | 74% | 2841 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 38,232 psi | 60% | 2710 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 33,953 psi | 53% | 2575 fps | 95.7% |
| ReloadSwiss RS 70 | 37 gr | 84% | 36,114 psi | 57% | 2641 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 51,721 psi | 81% | 2772 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,498 psi | 71% | 2694 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 38,827 psi | 61% | 2615 fps | 99.1% |
| Rottweil R 904 | <<locked>> | 98% | 51,677 psi | 81% | 2854 fps | 95% |
| Rottweil R 905 | <<locked>> | 98% | 47,964 psi | 75% | 2854 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 84% | 41,930 psi | 66% | 2644 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 35,708 psi | 56% | 2513 fps | 95.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,486 psi | 76% | 2769 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,656 psi | 68% | 2677 fps | 99.9% |
| Shooters World SW4350 | <<locked>> | 86% | 40,944 psi | 64% | 2651 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,668 psi | 62% | 2664 fps | 98.8% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 49,342 psi | 77% | 2789 fps | 99.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,978 psi | 74% | 2759 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,907 psi | 77% | 2684 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,988 psi | 64% | 2549 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 39,914 psi | 63% | 2569 fps | 95.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 47,529 psi | 74% | 2848 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 48,269 psi | 76% | 2680 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,023 psi | 77% | 2782 fps | 99.8% |
| Somchem S355 | <<locked>> | 80% | 39,349 psi | 62% | 2615 fps | 99.1% |
| Somchem S365 | <<locked>> | 80% | 29,008 psi | 45% | 2457 fps | 97.6% |
| Somchem S385 | <<locked>> | 94% | 42,873 psi | 67% | 2726 fps | 95.2% |
| Vihtavuori N133 | <<locked>> | 80% | 49,327 psi | 77% | 2671 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,324 psi | 71% | 2667 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,585 psi | 71% | 2674 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,594 psi | 59% | 2552 fps | 99.6% |
| Vihtavuori N160 | <<locked>> | 80% | 33,721 psi | 53% | 2510 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 50,894 psi | 80% | 2789 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,034 psi | 69% | 2671 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 33,199 psi | 52% | 2510 fps | 95.3% |
| Vihtavuori N555 | <<locked>> | 86% | 30,284 psi | 47% | 2500 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,228 psi | 52% | 2484 fps | 97.9% |
| Winchester 748 | <<locked>> | 80% | 51,111 psi | 80% | 2838 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 41,872 psi | 66% | 2730 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,094 psi | 44% | 2507 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,601 psi | 73% | 2762 fps | 99.9% |
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 6 mm XC loaded with the .243 | 77gr | Lapua Open Tip. Alliant Reloder-17 delivers the highest muzzle velocity at 3,054 fps; across all powders the maximum-charge window runs from 1,772 fps to 3,054 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 56–90 %, 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, 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 70, Hodgdon Superformance, Alliant Reloder-17 rank at the top here: for 6 mm XC with the .243 | 77gr | Lapua Open Tip 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.