Load Specifications
Bullet:.243 | 100gr | Hornady SP
Bullet Manufacturer:Hornady
Bullet Weight:100 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:1:9.5
Load data in caliber 6 mm XC with .243 | 100gr | Hornady SP bullet and 100 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% | 55,883 psi | 88% | 2867 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,056 psi | 86% | 2894 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 56,420 psi | 88% | 2963 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 57,159 psi | 90% | 2953 fps | 97.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,716 psi | 72% | 2854 fps | 97.4% |
| Accurate 4064 | <<locked>> | 88% | 55,027 psi | 86% | 2943 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 55,347 psi | 87% | 3041 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 84% | 55,143 psi | 86% | 2979 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 56,043 psi | 88% | 2976 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 53,374 psi | 84% | 3015 fps | 96.2% |
| ADI Benchmark 8208 | <<locked>> | 84% | 57,450 psi | 90% | 2976 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 55,317 psi | 87% | 2897 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 54,795 psi | 86% | 3100 fps | 99.9% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 52,968 psi | 83% | 3012 fps | 96.3% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 52,968 psi | 83% | 3012 fps | 96.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 56,405 psi | 88% | 3002 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 57,000 psi | 89% | 3025 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 56,362 psi | 88% | 3100 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 94% | 57,667 psi | 90% | 3136 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 52,185 psi | 82% | 3002 fps | 96.2% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 43,323 psi | 68% | 2884 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,791 psi | 76% | 3064 fps | 99.2% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,824 psi | 86% | 2992 fps | 99.8% |
| Bofors RP3 | <<locked>> | 90% | 57,014 psi | 89% | 3018 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 56,898 psi | 89% | 2992 fps | 98% |
| Hodgdon Benchmark | <<locked>> | 82% | 55,463 psi | 87% | 2904 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 57,072 psi | 89% | 3005 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 54,375 psi | 85% | 2979 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 94% | 54,302 psi | 85% | 3035 fps | 98.2% |
| Hodgdon H4350 | <<locked>> | 92% | 54,592 psi | 86% | 2995 fps | 97% |
| Hodgdon H4895 | <<locked>> | 84% | 55,709 psi | 87% | 2989 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 56,188 psi | 88% | 3018 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 55,506 psi | 87% | 3025 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,505 psi | 85% | 3071 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,810 psi | 56% | 1831 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 56,710 psi | 89% | 2986 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 55,709 psi | 87% | 2963 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 55,666 psi | 87% | 2963 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 55,288 psi | 87% | 2940 fps | 98.2% |
| IMR 4350 | <<locked>> | 98% | 57,290 psi | 90% | 3018 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 92% | 55,187 psi | 86% | 2966 fps | 98.1% |
| IMR 4831 | <<locked>> | 98% | 55,840 psi | 88% | 3031 fps | 99.8% |
| IMR 4895 | <<locked>> | 86% | 54,694 psi | 86% | 2999 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 57,450 psi | 90% | 2976 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 54,824 psi | 86% | 2946 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 57,551 psi | 90% | 2949 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 55,347 psi | 87% | 2953 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 55,027 psi | 86% | 2966 fps | 99.1% |
| Lovex S070 | <<locked>> | 96% | 55,738 psi | 87% | 2999 fps | 98.5% |
| Norma 201 | <<locked>> | 86% | 57,130 psi | 90% | 2969 fps | 100% |
| Norma 202 | <<locked>> | 84% | 54,462 psi | 85% | 2920 fps | 100% |
| Norma 203B | <<locked>> | 88% | 56,217 psi | 88% | 3012 fps | 100% |
| Norma 204 | <<locked>> | 96% | 54,317 psi | 85% | 3012 fps | 96.4% |
| Norma MRPᴾ | <<locked>> | 100% | 48,559 psi | 76% | 3018 fps | 97% |
| Norma URP | <<locked>> | 96% | 53,969 psi | 85% | 3022 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 88% | 56,695 psi | 89% | 3035 fps | 100% |
| Ramshot Hunter | <<locked>> | 98% | 56,521 psi | 89% | 3077 fps | 99.1% |
| Ramshot TAC | <<locked>> | 84% | 57,682 psi | 90% | 3002 fps | 99.5% |
| Ramshot Wild Boar | <<locked>> | 84% | 57,363 psi | 90% | 3015 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,434 psi | 57% | 1877 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 54,520 psi | 85% | 2959 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 57,682 psi | 90% | 3097 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 57,276 psi | 90% | 3130 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 55,245 psi | 87% | 3068 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 54,215 psi | 85% | 3091 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 82% | 54,520 psi | 85% | 2894 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 57,667 psi | 90% | 2966 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 57,319 psi | 90% | 3015 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 51,198 psi | 80% | 2986 fps | 96.1% |
| Rottweil R 907 | <<locked>> | 94% | 56,898 psi | 89% | 2992 fps | 98% |
| Shooters World Long Rifle | <<locked>> | 94% | 55,027 psi | 86% | 2966 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 84% | 54,824 psi | 86% | 2946 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 55,347 psi | 87% | 2953 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 55,738 psi | 87% | 2999 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 55,274 psi | 87% | 3022 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 56,347 psi | 88% | 2979 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 56,855 psi | 89% | 2999 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 54,926 psi | 86% | 2851 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 55,303 psi | 87% | 2851 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 54,824 psi | 86% | 2910 fps | 98.1% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 50,705 psi | 79% | 2979 fps | 96% |
| Somchem S335 | <<locked>> | 84% | 54,592 psi | 86% | 2851 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 55,854 psi | 88% | 2966 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 57,101 psi | 89% | 3005 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 56,362 psi | 88% | 3084 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,996 psi | 81% | 2966 fps | 97.1% |
| Vihtavuori N133 | <<locked>> | 84% | 55,303 psi | 87% | 2835 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 57,667 psi | 90% | 2927 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 54,824 psi | 86% | 2897 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 55,303 psi | 87% | 2936 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 56,652 psi | 89% | 3022 fps | 99.8% |
| Vihtavuori N530 | <<locked>> | 84% | 57,653 psi | 90% | 2972 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 56,550 psi | 89% | 2943 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 55,666 psi | 87% | 3028 fps | 99.7% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 48,124 psi | 75% | 2966 fps | 99.5% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 56,550 psi | 89% | 2995 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 54,317 psi | 85% | 2969 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 54,302 psi | 85% | 3035 fps | 98.2% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,783 psi | 61% | 2904 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 86% | 56,942 psi | 89% | 3005 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% | 52,663 psi | 83% | 2822 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 45,368 psi | 71% | 2746 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 52,736 psi | 83% | 2907 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 46,934 psi | 74% | 2779 fps | 95.7% |
| Accurate 3100 | <<locked>> | 96% | 39,871 psi | 62% | 2736 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 42,931 psi | 67% | 2743 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 34,156 psi | 54% | 2621 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 48,327 psi | 76% | 2861 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 41,075 psi | 64% | 2703 fps | 98.3% |
| ADI AR 2209 | <<locked>> | 98% | 49,806 psi | 78% | 2953 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,372 psi | 79% | 2864 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 51,503 psi | 81% | 2844 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 44,599 psi | 70% | 2910 fps | 99% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 49,516 psi | 78% | 2949 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 49,516 psi | 78% | 2949 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,234 psi | 65% | 2733 fps | 99.4% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,976 psi | 69% | 2795 fps | 99% |
| Alliant Reloder-16 | <<locked>> | 82% | 34,069 psi | 53% | 2635 fps | 95.8% |
| Alliant Reloder-17 | 35.9 gr | 80% | 35,665 psi | 56% | 2707 fps | 98.1% |
| Alliant Reloder-19 | <<locked>> | 98% | 48,849 psi | 77% | 2940 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 88% | 29,602 psi | 46% | 2536 fps | 95.5% |
| Alliant Reloder-26 | <<locked>> | 92% | 36,593 psi | 57% | 2789 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,732 psi | 75% | 2867 fps | 99.1% |
| Bofors RP3 | <<locked>> | 80% | 41,046 psi | 64% | 2740 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 44,266 psi | 69% | 2762 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,953 psi | 81% | 2851 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,980 psi | 78% | 2897 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 41,756 psi | 65% | 2743 fps | 97.5% |
| Hodgdon H414 | <<locked>> | 86% | 41,727 psi | 65% | 2795 fps | 95.2% |
| Hodgdon H4350 | <<locked>> | 88% | 48,167 psi | 75% | 2877 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 48,820 psi | 77% | 2874 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,370 psi | 46% | 2470 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 45,339 psi | 71% | 2851 fps | 99.8% |
| Hodgdon Superformance | 41.8 gr | 88% | 44,121 psi | 69% | 2874 fps | 95.4% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,643 psi | 42% | 1634 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,804 psi | 73% | 2822 fps | 99.8% |
| IMR 3031 | <<locked>> | 80% | 49,139 psi | 77% | 2864 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,163 psi | 68% | 2740 fps | 98.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,730 psi | 72% | 2769 fps | 96.3% |
| IMR 4350 | <<locked>> | 90% | 44,686 psi | 70% | 2795 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 84% | 43,134 psi | 68% | 2743 fps | 95.5% |
| IMR 4831 | <<locked>> | 82% | 33,156 psi | 52% | 2579 fps | 95.4% |
| IMR 4895 | <<locked>> | 80% | 45,063 psi | 71% | 2828 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 80% | 50,372 psi | 79% | 2864 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 48,182 psi | 76% | 2841 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,993 psi | 75% | 2792 fps | 99.7% |
| Lovex S062 | <<locked>> | 80% | 43,323 psi | 68% | 2746 fps | 99.8% |
| Lovex S065 | <<locked>> | 82% | 37,869 psi | 59% | 2631 fps | 95.5% |
| Lovex S070 | <<locked>> | 86% | 40,930 psi | 64% | 2720 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 47,471 psi | 74% | 2812 fps | 100% |
| Norma 202 | <<locked>> | 80% | 47,950 psi | 75% | 2815 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,323 psi | 68% | 2785 fps | 99.2% |
| Norma 204 | <<locked>> | 94% | 50,734 psi | 80% | 2949 fps | 95.5% |
| Norma MRP | <<locked>> | 96% | 42,351 psi | 66% | 2887 fps | 95.1% |
| Norma URP | <<locked>> | 82% | 34,258 psi | 54% | 2621 fps | 95.6% |
| Ramshot Big Game | <<locked>> | 80% | 43,381 psi | 68% | 2805 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 38,043 psi | 60% | 2720 fps | 95% |
| Ramshot TAC | <<locked>> | 80% | 50,415 psi | 79% | 2881 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 50,343 psi | 79% | 2904 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,282 psi | 43% | 1680 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,916 psi | 66% | 2723 fps | 95.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 47,137 psi | 74% | 2917 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 37,956 psi | 59% | 2772 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 33,895 psi | 53% | 2638 fps | 95.2% |
| ReloadSwiss RS 70 | 38.3 gr | 84% | 35,955 psi | 56% | 2700 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 51,445 psi | 81% | 2848 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,150 psi | 71% | 2762 fps | 99.9% |
| Rottweil R 903 | <<locked>> | 80% | 38,740 psi | 61% | 2684 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 98% | 47,674 psi | 75% | 2920 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 86% | 44,266 psi | 69% | 2762 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 82% | 37,869 psi | 59% | 2631 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,182 psi | 76% | 2841 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,323 psi | 68% | 2746 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 86% | 40,930 psi | 64% | 2720 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,740 psi | 62% | 2736 fps | 98.5% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,921 psi | 77% | 2854 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,094 psi | 74% | 2835 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,631 psi | 76% | 2756 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,785 psi | 64% | 2618 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 42,424 psi | 66% | 2687 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 47,210 psi | 74% | 2913 fps | 95.1% |
| Somchem S335 | <<locked>> | 80% | 48,283 psi | 76% | 2756 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,588 psi | 76% | 2848 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 39,305 psi | 62% | 2684 fps | 98.8% |
| Somchem S365 | <<locked>> | 80% | 28,921 psi | 45% | 2516 fps | 97.1% |
| Somchem S385 | <<locked>> | 96% | 45,353 psi | 71% | 2844 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 49,066 psi | 77% | 2746 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,092 psi | 71% | 2736 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,527 psi | 71% | 2749 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,536 psi | 59% | 2618 fps | 99.4% |
| Vihtavuori N160 | <<locked>> | 80% | 33,344 psi | 52% | 2566 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 50,720 psi | 79% | 2864 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 43,816 psi | 69% | 2736 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 35,346 psi | 55% | 2628 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 88% | 32,227 psi | 51% | 2618 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,938 psi | 52% | 2539 fps | 97.4% |
| Winchester 748 | <<locked>> | 80% | 50,778 psi | 80% | 2913 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 41,727 psi | 65% | 2795 fps | 95.2% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,065 psi | 44% | 2559 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,615 psi | 73% | 2838 fps | 99.8% |
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 100 powders for 6 mm XC loaded with the .243 | 100gr | Hornady SP. Alliant Reloder-17 delivers the highest muzzle velocity at 3,136 fps; across all powders the maximum-charge window runs from 1,831 fps to 3,136 fps. Accurate 3100 gives the best case fill at 100 %, and 100 of the 100 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 1:9.5 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 | 100gr | Hornady SP 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.