Load Specifications
Bullet Manufacturer:Sellier & Bellot
Bullet Weight:100 gr
Bullet Diameter:0.243"
Bullet Length:<<locked>>
Caliber:6 mm GT load data
Case Length (l3):1.725"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:43.5 Grains of Water
Primer Size:Small Rifle (SR)
Barrel Length:24"
Max. allowed Pressure:62,001 psi
Recommended Twist Rate:1:10.5
Load data in caliber 6 mm GT with .243 | 100gr | Sellier & Bellot SP bullet and 101 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, ReloadSwiss RS 60 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>> | 86% | 55,753 psi | 90% | 2785 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 54,027 psi | 87% | 2808 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 53,838 psi | 87% | 2805 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 56,057 psi | 90% | 2874 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 53,693 psi | 87% | 2795 fps | 96.1% |
| Accurate 4064 | <<locked>> | 92% | 54,114 psi | 87% | 2851 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 53,563 psi | 86% | 2927 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 88% | 54,737 psi | 88% | 2881 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 94% | 55,637 psi | 90% | 2877 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 86% | 53,983 psi | 87% | 2835 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 54,679 psi | 88% | 2818 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 55,637 psi | 90% | 2943 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 54,114 psi | 87% | 2992 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 55,608 psi | 90% | 2904 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 55,405 psi | 89% | 2789 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 52,939 psi | 85% | 2874 fps | 99.5% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 51,619 psi | 83% | 2927 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 96% | 52,504 psi | 85% | 2966 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,854 psi | 59% | 2654 fps | 97.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 40,596 psi | 65% | 2795 fps | 96.2% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,563 psi | 88% | 2897 fps | 99.4% |
| Bofors RP3 | <<locked>> | 94% | 56,057 psi | 90% | 2917 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 52,910 psi | 85% | 2828 fps | 96.2% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,782 psi | 90% | 2818 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 53,229 psi | 86% | 2867 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 55,158 psi | 89% | 2966 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 82% | 54,636 psi | 88% | 2831 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,695 psi | 90% | 2858 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 53,519 psi | 86% | 2871 fps | 98.8% |
| Hodgdon H414 | <<locked>> | 98% | 53,055 psi | 86% | 2920 fps | 97% |
| Hodgdon H4895 | <<locked>> | 88% | 55,230 psi | 89% | 2890 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,906 psi | 77% | 2805 fps | 99.6% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 54,766 psi | 88% | 2930 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 54,041 psi | 87% | 2956 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,389 psi | 57% | 1749 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 53,127 psi | 86% | 2841 fps | 99.9% |
| IMR 3031 | <<locked>> | 88% | 54,940 psi | 89% | 2874 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 55,274 psi | 89% | 2861 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,579 psi | 90% | 2841 fps | 97.3% |
| IMR 4198 | <<locked>> | 82% | 55,521 psi | 90% | 2749 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 53,200 psi | 86% | 2854 fps | 96.3% |
| IMR 4451 Enduron | <<locked>> | 96% | 55,216 psi | 89% | 2864 fps | 97.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 50,415 psi | 81% | 2858 fps | 98.9% |
| IMR 4895 | <<locked>> | 90% | 54,273 psi | 88% | 2904 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 53,983 psi | 87% | 2835 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 53,969 psi | 87% | 2822 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 54,288 psi | 88% | 2858 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,418 psi | 88% | 2808 fps | 99.8% |
| Lovex S062 | <<locked>> | 92% | 55,100 psi | 89% | 2861 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 53,983 psi | 87% | 2854 fps | 98.2% |
| Lovex S070ᴾ | <<locked>> | 100% | 55,056 psi | 89% | 2890 fps | 97.5% |
| Norma 201 | <<locked>> | 88% | 53,505 psi | 86% | 2828 fps | 100% |
| Norma 202 | <<locked>> | 88% | 54,085 psi | 87% | 2835 fps | 100% |
| Norma 203B | <<locked>> | 92% | 55,376 psi | 89% | 2910 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 52,721 psi | 85% | 2913 fps | 99.1% |
| Ramshot Big Game | <<locked>> | 92% | 55,898 psi | 90% | 2933 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 51,677 psi | 83% | 2907 fps | 97.6% |
| Ramshot TAC | <<locked>> | 86% | 54,375 psi | 88% | 2851 fps | 98.4% |
| Ramshot Wild Boar | <<locked>> | 86% | 53,838 psi | 87% | 2871 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,737 psi | 88% | 2835 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,665 psi | 58% | 1788 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 53,388 psi | 86% | 2818 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 54,331 psi | 88% | 2858 fps | 97.7% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 52,997 psi | 85% | 2936 fps | 99.5% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 55,999 psi | 90% | 3025 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 52,837 psi | 85% | 2940 fps | 99% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 53,316 psi | 86% | 2972 fps | 98.8% |
| Rottweil R 901 | <<locked>> | 86% | 54,679 psi | 88% | 2815 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 54,201 psi | 87% | 2828 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 55,912 psi | 90% | 2907 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 52,910 psi | 85% | 2828 fps | 96.2% |
| Shooters World Long Rifle | <<locked>> | 98% | 53,983 psi | 87% | 2854 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 88% | 54,288 psi | 88% | 2858 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 55,100 psi | 89% | 2861 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 55,056 psi | 89% | 2890 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 54,244 psi | 87% | 2920 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 52,533 psi | 85% | 2825 fps | 98.6% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 53,287 psi | 86% | 2851 fps | 99.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 55,506 psi | 90% | 2772 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 55,492 psi | 90% | 2769 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 54,636 psi | 88% | 2808 fps | 97.1% |
| Somchem S321 | <<locked>> | 84% | 55,100 psi | 89% | 2871 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 54,462 psi | 88% | 2769 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 55,695 psi | 90% | 2874 fps | 99.8% |
| Somchem S355 | <<locked>> | 94% | 52,982 psi | 85% | 2854 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 47,181 psi | 76% | 2864 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 55,259 psi | 89% | 2740 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 55,622 psi | 90% | 2759 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 53,766 psi | 87% | 2799 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 54,549 psi | 88% | 2812 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 54,302 psi | 88% | 2835 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 55,434 psi | 89% | 2913 fps | 99.3% |
| Vihtavuori N530 | <<locked>> | 86% | 54,244 psi | 87% | 2835 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 55,985 psi | 90% | 2854 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 54,360 psi | 88% | 2917 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,494 psi | 64% | 2726 fps | 97.4% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 56,086 psi | 90% | 2894 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 54,186 psi | 87% | 2884 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 53,055 psi | 86% | 2920 fps | 97% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 32,924 psi | 53% | 2628 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 88% | 52,982 psi | 85% | 2861 fps | 99.9% |
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% | 46,412 psi | 75% | 2648 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,865 psi | 82% | 2762 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,870 psi | 63% | 2566 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,861 psi | 74% | 2717 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 50,140 psi | 81% | 2736 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 36,767 psi | 59% | 2556 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 35,056 psi | 57% | 2579 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 42,728 psi | 69% | 2671 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 80% | 36,274 psi | 59% | 2516 fps | 96.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,802 psi | 72% | 2684 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 80% | 44,599 psi | 72% | 2674 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 52,301 psi | 84% | 2890 fps | 99.9% |
| Alliant Power Pro 2000-MR | 31.5 gr | 80% | 38,595 psi | 62% | 2687 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,766 psi | 58% | 2539 fps | 97.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 52,112 psi | 84% | 2743 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 38,522 psi | 62% | 2605 fps | 97% |
| Alliant Reloder-16 | <<locked>> | 88% | 35,766 psi | 58% | 2595 fps | 95.3% |
| Alliant Reloder-17 | 31 gr | 80% | 30,777 psi | 50% | 2490 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 96% | 32,474 psi | 52% | 2539 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 37,869 psi | 61% | 2730 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,640 psi | 67% | 2667 fps | 97.3% |
| Bofors RP3 | <<locked>> | 80% | 35,259 psi | 57% | 2539 fps | 97.6% |
| Bofors RP7 | <<locked>> | 94% | 49,835 psi | 80% | 2776 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,470 psi | 75% | 2671 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 43,294 psi | 70% | 2700 fps | 99.7% |
| Hodgdon CFE223 | <<locked>> | 80% | 47,485 psi | 77% | 2838 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 80% | 50,894 psi | 82% | 2779 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,996 psi | 84% | 2805 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 38,769 psi | 63% | 2598 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 94% | 46,514 psi | 75% | 2805 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 43,134 psi | 70% | 2684 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,821 psi | 50% | 2441 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,928 psi | 63% | 2648 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 96% | 49,980 psi | 81% | 2884 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,324 psi | 42% | 1562 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 41,394 psi | 67% | 2635 fps | 98.6% |
| IMR 3031 | <<locked>> | 80% | 42,511 psi | 69% | 2684 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 38,072 psi | 61% | 2552 fps | 96.9% |
| IMR 4166 Enduron | <<locked>> | 84% | 46,224 psi | 75% | 2684 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 52,214 psi | 84% | 2703 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 49,719 psi | 80% | 2795 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 90% | 45,934 psi | 74% | 2707 fps | 95% |
| IMR 4831 | <<locked>> | 90% | 36,593 psi | 59% | 2595 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 39,465 psi | 64% | 2635 fps | 97.8% |
| IMR 8208 XBR | <<locked>> | 80% | 44,802 psi | 72% | 2684 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 80% | 50,372 psi | 81% | 2766 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,655 psi | 67% | 2654 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 43,004 psi | 69% | 2612 fps | 98.5% |
| Lovex S062 | <<locked>> | 80% | 38,043 psi | 61% | 2559 fps | 98.6% |
| Lovex S065 | <<locked>> | 88% | 39,827 psi | 64% | 2595 fps | 95% |
| Lovex S070 | <<locked>> | 94% | 45,687 psi | 74% | 2730 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 41,698 psi | 67% | 2621 fps | 99.2% |
| Norma 202 | <<locked>> | 80% | 42,032 psi | 68% | 2638 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,913 psi | 61% | 2592 fps | 97.4% |
| Norma URP | <<locked>> | 88% | 35,708 psi | 58% | 2585 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 37,217 psi | 60% | 2598 fps | 97% |
| Ramshot Hunter | <<locked>> | 94% | 42,467 psi | 68% | 2733 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 44,628 psi | 72% | 2680 fps | 96.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,961 psi | 71% | 2703 fps | 98.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 48,428 psi | 78% | 2733 fps | 99.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,643 psi | 43% | 1601 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 50,299 psi | 81% | 2769 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 44,730 psi | 72% | 2694 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,914 psi | 64% | 2697 fps | 97.4% |
| ReloadSwiss RS 60 | 31 gr | 80% | 32,764 psi | 53% | 2562 fps | 98.4% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 37,637 psi | 61% | 2657 fps | 95.6% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 40,480 psi | 65% | 2720 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 45,774 psi | 74% | 2671 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,755 psi | 64% | 2575 fps | 98.8% |
| Rottweil R 903 | <<locked>> | 80% | 33,315 psi | 54% | 2487 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 94% | 49,835 psi | 80% | 2776 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,827 psi | 64% | 2595 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,655 psi | 67% | 2654 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 38,043 psi | 61% | 2559 fps | 98.6% |
| Shooters World SW4350 | <<locked>> | 94% | 45,687 psi | 74% | 2730 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 34,026 psi | 55% | 2530 fps | 96% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,699 psi | 69% | 2651 fps | 96.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 41,002 psi | 66% | 2635 fps | 98.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 43,366 psi | 70% | 2585 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,984 psi | 58% | 2451 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 47,776 psi | 77% | 2697 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 48,153 psi | 78% | 2759 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 42,699 psi | 69% | 2585 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 42,380 psi | 68% | 2651 fps | 98.3% |
| Somchem S355 | <<locked>> | 80% | 34,026 psi | 55% | 2490 fps | 96.7% |
| Somchem S365 | <<locked>> | 84% | 28,079 psi | 45% | 2421 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 49,023 psi | 79% | 2651 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,656 psi | 70% | 2582 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 39,204 psi | 63% | 2569 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,929 psi | 64% | 2575 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,532 psi | 52% | 2434 fps | 97.6% |
| Vihtavuori N160 | <<locked>> | 88% | 37,188 psi | 60% | 2582 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 44,773 psi | 72% | 2677 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 80% | 38,232 psi | 62% | 2559 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 36,535 psi | 59% | 2585 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 96% | 34,853 psi | 56% | 2621 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,763 psi | 50% | 2402 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 44,338 psi | 72% | 2723 fps | 99.8% |
| Winchester 760 | <<locked>> | 94% | 46,514 psi | 75% | 2805 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 98% | 30,777 psi | 50% | 2559 fps | 95% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,582 psi | 65% | 2644 fps | 98.5% |
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 101 powders for 6 mm GT loaded with the .243 | 100gr | Sellier & Bellot SP. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,025 fps; across all powders the maximum-charge window runs from 1,749 fps to 3,025 fps. Accurate 4350 gives the best case fill at 100 %, and 101 of the 101 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 100.0 gr projectile in 0.243" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 4350, Alliant Reloder-16, Alliant Reloder-23 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. Alliant Power Pro 2000-MR, ReloadSwiss RS 60, Alliant Reloder-17 rank at the top here: for 6 mm GT with the .243 | 100gr | Sellier & Bellot 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.