Load Specifications
Load data in caliber 6 mm GT with .243 | 90gr | Barnes X S bullet and 91 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Power Pro 2000-MR and ReloadSwiss RS 52.
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>> | 86% | 54,824 psi | 88% | 2897 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 53,359 psi | 86% | 2917 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 53,737 psi | 87% | 2923 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 54,824 psi | 88% | 2979 fps | 100% |
| Accurate 4064 | <<locked>> | 92% | 53,635 psi | 87% | 2966 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 51,547 psi | 83% | 3009 fps | 98% |
| ADI AR 2206H | <<locked>> | 88% | 53,461 psi | 86% | 2979 fps | 99.2% |
| ADI AR 2208 | <<locked>> | 94% | 54,085 psi | 87% | 2969 fps | 98.8% |
| ADI Benchmark 8208 | <<locked>> | 88% | 55,767 psi | 90% | 2982 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 86% | 52,837 psi | 85% | 2927 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 54,056 psi | 87% | 3041 fps | 99.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,956 psi | 90% | 3143 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 54,157 psi | 87% | 3002 fps | 99.7% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,360 psi | 88% | 2900 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 54,810 psi | 88% | 3022 fps | 99% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,140 psi | 81% | 3009 fps | 98% |
| Alliant Reloder-17 | <<locked>> | 98% | 53,983 psi | 87% | 3107 fps | 99.6% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 55,753 psi | 90% | 2871 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 52,924 psi | 85% | 2986 fps | 98.3% |
| Bofors RP3 | <<locked>> | 94% | 54,752 psi | 88% | 3018 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 86% | 54,534 psi | 88% | 2920 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 88% | 55,027 psi | 89% | 3015 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 52,707 psi | 85% | 3048 fps | 98.8% |
| Hodgdon H322 | <<locked>> | 82% | 53,084 psi | 86% | 2936 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,186 psi | 87% | 2963 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 55,970 psi | 90% | 3022 fps | 98.2% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 54,447 psi | 88% | 3054 fps | 95.8% |
| Hodgdon H4895 | <<locked>> | 88% | 53,896 psi | 87% | 2989 fps | 99.5% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,253 psi | 75% | 2884 fps | 98.5% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 56,072 psi | 90% | 3074 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,244 psi | 57% | 1827 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 55,172 psi | 89% | 2995 fps | 99.6% |
| IMR 3031 | <<locked>> | 88% | 53,156 psi | 86% | 2982 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 53,780 psi | 87% | 2956 fps | 98.9% |
| IMR 4198 | <<locked>> | 82% | 53,911 psi | 87% | 2854 fps | 100% |
| IMR 4831ᴾ | <<locked>> | 100% | 48,965 psi | 79% | 2946 fps | 97.6% |
| IMR 4895 | <<locked>> | 92% | 56,028 psi | 90% | 3054 fps | 99.5% |
| IMR 8208 XBR | <<locked>> | 88% | 55,767 psi | 90% | 2982 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 82% | 53,229 psi | 86% | 2927 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 88% | 53,171 psi | 86% | 2963 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 53,200 psi | 86% | 2904 fps | 99.1% |
| Lovex S062 | <<locked>> | 92% | 53,969 psi | 87% | 2963 fps | 99.8% |
| Lovex S065ᴾ | <<locked>> | 100% | 56,014 psi | 90% | 2995 fps | 97.4% |
| Lovex S070ᴾ | <<locked>> | 100% | 53,432 psi | 86% | 2972 fps | 95.8% |
| Norma 201 | <<locked>> | 90% | 55,869 psi | 90% | 2979 fps | 99.9% |
| Norma 202 | <<locked>> | 90% | 55,956 psi | 90% | 2986 fps | 100% |
| Norma 203B | <<locked>> | 92% | 53,940 psi | 87% | 3009 fps | 99.2% |
| Norma URPᴾ | <<locked>> | 100% | 50,546 psi | 82% | 2992 fps | 97.7% |
| Ramshot Big Game | <<locked>> | 92% | 53,998 psi | 87% | 3028 fps | 99.1% |
| Ramshot TAC | <<locked>> | 86% | 53,156 psi | 86% | 2940 fps | 97.1% |
| Ramshot Wild Boar | <<locked>> | 88% | 55,434 psi | 89% | 3015 fps | 99.3% |
| Ramshot X-Terminator | <<locked>> | 84% | 53,577 psi | 86% | 2930 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,940 psi | 58% | 1877 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 55,651 psi | 90% | 2972 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 52,591 psi | 85% | 2940 fps | 96% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 54,230 psi | 87% | 3081 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 54,114 psi | 87% | 3120 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 50,923 psi | 82% | 3025 fps | 97.6% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 51,387 psi | 83% | 3038 fps | 97% |
| Rottweil R 901 | <<locked>> | 86% | 54,360 psi | 88% | 2927 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 53,432 psi | 86% | 2933 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 96% | 54,621 psi | 88% | 3005 fps | 99.6% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 56,014 psi | 90% | 2995 fps | 97.4% |
| Shooters World Match Rifle | <<locked>> | 88% | 53,171 psi | 86% | 2963 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 53,969 psi | 87% | 2963 fps | 99.8% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 53,432 psi | 86% | 2972 fps | 95.8% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,347 psi | 89% | 2936 fps | 99.7% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 55,637 psi | 90% | 3061 fps | 99.4% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 54,810 psi | 88% | 2920 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,027 psi | 89% | 2972 fps | 97.9% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 54,955 psi | 89% | 2995 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,360 psi | 88% | 2877 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,012 psi | 87% | 2871 fps | 100% |
| Somchem S321 | <<locked>> | 84% | 53,853 psi | 87% | 2969 fps | 99.9% |
| Somchem S335 | <<locked>> | 88% | 53,548 psi | 86% | 2874 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 54,085 psi | 87% | 2966 fps | 99.1% |
| Somchem S355 | <<locked>> | 96% | 54,955 psi | 89% | 3002 fps | 99.6% |
| Somchem S365ᴾ | <<locked>> | 100% | 45,455 psi | 73% | 2946 fps | 99.5% |
| Vihtavuori N130 | <<locked>> | 84% | 54,099 psi | 87% | 2848 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,244 psi | 87% | 2864 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 55,666 psi | 90% | 2949 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 53,185 psi | 86% | 2913 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 52,968 psi | 85% | 2933 fps | 99.9% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 53,055 psi | 86% | 2989 fps | 98% |
| Vihtavuori N530 | <<locked>> | 86% | 52,924 psi | 85% | 2930 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 92% | 54,636 psi | 88% | 2956 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 52,359 psi | 84% | 2999 fps | 97.8% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 54,041 psi | 87% | 2976 fps | 99.6% |
| Winchester 748 | <<locked>> | 88% | 55,680 psi | 90% | 3031 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 54,447 psi | 88% | 3054 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 90% | 54,621 psi | 88% | 3005 fps | 99.6% |
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% | 46,050 psi | 74% | 2756 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,401 psi | 81% | 2871 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 39,943 psi | 64% | 2694 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,295 psi | 73% | 2818 fps | 99.8% |
| Accurate 4064 | <<locked>> | 80% | 37,695 psi | 61% | 2674 fps | 99.4% |
| Accurate 4350 | <<locked>> | 92% | 39,798 psi | 64% | 2782 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 42,250 psi | 68% | 2766 fps | 97.2% |
| ADI AR 2208 | <<locked>> | 82% | 38,043 psi | 61% | 2654 fps | 95.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,005 psi | 71% | 2776 fps | 98.7% |
| Alliant AR-Comp | <<locked>> | 80% | 43,424 psi | 70% | 2779 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 50,952 psi | 82% | 2989 fps | 99.2% |
| Alliant Power Pro 2000-MR | 32 gr | 82% | 40,625 psi | 66% | 2831 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,578 psi | 57% | 2635 fps | 96.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,227 psi | 83% | 2854 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,203 psi | 62% | 2694 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 94% | 41,945 psi | 68% | 2835 fps | 95.8% |
| Alliant Reloder-17 | <<locked>> | 84% | 35,085 psi | 57% | 2697 fps | 95.2% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 52,417 psi | 85% | 2822 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,857 psi | 66% | 2753 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 35,331 psi | 57% | 2638 fps | 96.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,730 psi | 74% | 2766 fps | 99.3% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,641 psi | 69% | 2795 fps | 98.9% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,050 psi | 74% | 2927 fps | 97.6% |
| Hodgdon H322 | <<locked>> | 80% | 49,995 psi | 81% | 2887 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 50,734 psi | 82% | 2907 fps | 100% |
| Hodgdon H380 | <<locked>> | 86% | 43,642 psi | 70% | 2802 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 98% | 50,865 psi | 82% | 2992 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 42,540 psi | 69% | 2779 fps | 97.8% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 34,592 psi | 56% | 2628 fps | 95.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,276 psi | 62% | 2736 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,585 psi | 43% | 1640 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,683 psi | 66% | 2723 fps | 97.3% |
| IMR 3031 | <<locked>> | 80% | 41,655 psi | 67% | 2785 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,666 psi | 61% | 2638 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 51,198 psi | 83% | 2815 fps | 100% |
| IMR 4831 | <<locked>> | 94% | 40,611 psi | 66% | 2785 fps | 95.5% |
| IMR 4895 | <<locked>> | 80% | 39,015 psi | 63% | 2726 fps | 96.4% |
| IMR 8208 XBR | <<locked>> | 80% | 44,005 psi | 71% | 2776 fps | 98.7% |
| Lovex D073.5 | <<locked>> | 80% | 49,864 psi | 80% | 2871 fps | 99.8% |
| Lovex D073.6 | <<locked>> | 80% | 41,307 psi | 67% | 2753 fps | 99.4% |
| Lovex S060 | <<locked>> | 80% | 42,424 psi | 68% | 2703 fps | 97.3% |
| Lovex S062 | <<locked>> | 80% | 38,000 psi | 61% | 2657 fps | 97.5% |
| Lovex S065 | <<locked>> | 94% | 47,224 psi | 76% | 2841 fps | 95.6% |
| Lovex S070 | <<locked>> | 98% | 50,444 psi | 81% | 2920 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 42,003 psi | 68% | 2730 fps | 98.4% |
| Norma 202 | <<locked>> | 80% | 41,539 psi | 67% | 2736 fps | 99.7% |
| Norma 203B | <<locked>> | 80% | 37,608 psi | 61% | 2684 fps | 95.9% |
| Norma URP | <<locked>> | 94% | 42,032 psi | 68% | 2828 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 36,753 psi | 59% | 2684 fps | 95.3% |
| Ramshot TAC | <<locked>> | 82% | 46,891 psi | 76% | 2825 fps | 95.7% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,149 psi | 70% | 2792 fps | 97.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,543 psi | 77% | 2825 fps | 98.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,963 psi | 43% | 1680 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,226 psi | 79% | 2867 fps | 99.9% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 49,705 psi | 80% | 2887 fps | 95.3% |
| ReloadSwiss RS 52 | 30.3 gr | 80% | 39,450 psi | 64% | 2792 fps | 95.8% |
| ReloadSwiss RS 60 | 30.7 gr | 80% | 32,677 psi | 53% | 2644 fps | 96.9% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 42,018 psi | 68% | 2851 fps | 95.4% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 45,034 psi | 73% | 2910 fps | 95.2% |
| Rottweil R 901 | <<locked>> | 80% | 45,919 psi | 74% | 2782 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 80% | 39,842 psi | 64% | 2674 fps | 97.9% |
| Rottweil R 903 | <<locked>> | 80% | 33,504 psi | 54% | 2585 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 94% | 47,224 psi | 76% | 2841 fps | 95.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,307 psi | 67% | 2753 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 38,000 psi | 61% | 2657 fps | 97.5% |
| Shooters World SW4350 | <<locked>> | 98% | 50,444 psi | 81% | 2920 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 51,779 psi | 84% | 2881 fps | 99.4% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 36,100 psi | 58% | 2674 fps | 95.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 51,634 psi | 83% | 2871 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,308 psi | 68% | 2743 fps | 95.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,741 psi | 66% | 2730 fps | 96.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,917 psi | 69% | 2684 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,694 psi | 58% | 2546 fps | 99.5% |
| Somchem S321 | <<locked>> | 80% | 47,311 psi | 76% | 2858 fps | 99.3% |
| Somchem S335 | <<locked>> | 80% | 42,844 psi | 69% | 2694 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,640 psi | 67% | 2740 fps | 96.9% |
| Somchem S355 | <<locked>> | 80% | 34,418 psi | 56% | 2592 fps | 95.4% |
| Somchem S365 | <<locked>> | 88% | 32,010 psi | 52% | 2621 fps | 95.7% |
| Vihtavuori N130 | <<locked>> | 80% | 48,240 psi | 78% | 2756 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,888 psi | 69% | 2684 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,754 psi | 63% | 2671 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,436 psi | 64% | 2671 fps | 99.6% |
| Vihtavuori N150 | <<locked>> | 80% | 32,547 psi | 52% | 2526 fps | 96.3% |
| Vihtavuori N160 | <<locked>> | 92% | 41,597 psi | 67% | 2776 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 44,034 psi | 71% | 2772 fps | 98.7% |
| Vihtavuori N540 | <<locked>> | 80% | 37,927 psi | 61% | 2654 fps | 99.2% |
| Vihtavuori N550 | <<locked>> | 92% | 40,857 psi | 66% | 2779 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 34,983 psi | 56% | 2592 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 43,294 psi | 70% | 2818 fps | 99.2% |
| Winchester 760 | <<locked>> | 98% | 51,285 psi | 83% | 2999 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,914 psi | 64% | 2733 fps | 97.2% |
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 108 powders for 6 mm GT loaded with the .243 | 90gr | Barnes X S. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,143 fps; across all powders the maximum-charge window runs from 1,827 fps to 3,143 fps. Accurate 3100 gives the best case fill at 100 %, and 108 of the 108 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (427 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 90.0 gr projectile in 0.243" calls for a 1:9.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate 4350, Alliant Reloder-16 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 60, Alliant Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for 6 mm GT with the .243 | 90gr | Barnes X S they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 3100, Alliant Reloder-26, Hodgdon H4350 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.