Load Specifications
Bullet:.243 | 100gr | Hornady SP
Bullet Manufacturer:Hornady
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:1:9.5
Load data in caliber 6 mm GT 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 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% | 55,027 psi | 89% | 2769 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 53,403 psi | 86% | 2795 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 53,127 psi | 86% | 2789 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,477 psi | 89% | 2861 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 53,229 psi | 86% | 2782 fps | 95.8% |
| Accurate 4064 | <<locked>> | 92% | 52,997 psi | 85% | 2835 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,504 psi | 85% | 2907 fps | 99% |
| ADI AR 2206H | <<locked>> | 88% | 54,114 psi | 87% | 2867 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 94% | 55,114 psi | 89% | 2864 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 86% | 53,403 psi | 86% | 2822 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 53,882 psi | 87% | 2802 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 54,853 psi | 88% | 2923 fps | 99.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 53,621 psi | 86% | 2979 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 54,636 psi | 88% | 2884 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,636 psi | 88% | 2772 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 55,666 psi | 90% | 2910 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,720 psi | 82% | 2904 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 98% | 55,448 psi | 89% | 3005 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 36,201 psi | 58% | 2635 fps | 97.1% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 54,056 psi | 87% | 2884 fps | 99.3% |
| Bofors RP3 | <<locked>> | 94% | 55,506 psi | 90% | 2904 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 55,767 psi | 90% | 2864 fps | 96.6% |
| Hodgdon Benchmark | <<locked>> | 86% | 55,201 psi | 89% | 2805 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 55,941 psi | 90% | 2900 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,070 psi | 87% | 2943 fps | 99.6% |
| Hodgdon H322 | <<locked>> | 82% | 53,911 psi | 87% | 2818 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 55,042 psi | 89% | 2844 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 52,997 psi | 85% | 2858 fps | 98.7% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 55,448 psi | 89% | 2953 fps | 97.4% |
| Hodgdon H4895 | <<locked>> | 88% | 54,607 psi | 88% | 2877 fps | 99.9% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 47,036 psi | 76% | 2785 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 53,737 psi | 87% | 2910 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 52,866 psi | 85% | 2927 fps | 96.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,172 psi | 57% | 1739 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 55,811 psi | 90% | 2877 fps | 99.9% |
| IMR 3031 | <<locked>> | 88% | 54,201 psi | 87% | 2861 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,679 psi | 88% | 2848 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 90% | 55,100 psi | 89% | 2828 fps | 97.1% |
| IMR 4198 | <<locked>> | 82% | 54,723 psi | 88% | 2733 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,344 psi | 84% | 2835 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,273 psi | 88% | 2844 fps | 96.9% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,908 psi | 80% | 2848 fps | 98.8% |
| IMR 4895 | <<locked>> | 90% | 53,258 psi | 86% | 2884 fps | 99.7% |
| IMR 8208 XBR | <<locked>> | 86% | 53,403 psi | 86% | 2822 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 53,374 psi | 86% | 2805 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 53,679 psi | 87% | 2844 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 53,838 psi | 87% | 2792 fps | 99.7% |
| Lovex S062 | <<locked>> | 92% | 54,476 psi | 88% | 2848 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 53,505 psi | 86% | 2841 fps | 98.1% |
| Lovex S070ᴾ | <<locked>> | 100% | 54,172 psi | 87% | 2871 fps | 97.2% |
| Norma 201 | <<locked>> | 88% | 52,881 psi | 85% | 2812 fps | 100% |
| Norma 202 | <<locked>> | 88% | 53,447 psi | 86% | 2818 fps | 100% |
| Norma 203B | <<locked>> | 92% | 54,824 psi | 88% | 2897 fps | 99.8% |
| Norma URPᴾ | <<locked>> | 100% | 51,779 psi | 84% | 2894 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 92% | 55,390 psi | 89% | 2923 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 50,850 psi | 82% | 2884 fps | 97.3% |
| Ramshot TAC | <<locked>> | 86% | 53,461 psi | 86% | 2831 fps | 98.2% |
| Ramshot Wild Boar | <<locked>> | 86% | 52,881 psi | 85% | 2851 fps | 99.7% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,215 psi | 87% | 2818 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,447 psi | 57% | 1778 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 52,808 psi | 85% | 2802 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 53,374 psi | 86% | 2838 fps | 97.4% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 55,811 psi | 90% | 2976 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 55,100 psi | 89% | 3005 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 51,895 psi | 84% | 2923 fps | 98.8% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,576 psi | 85% | 2953 fps | 98.5% |
| Rottweil R 901 | <<locked>> | 86% | 53,969 psi | 87% | 2799 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 53,563 psi | 86% | 2815 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 54,882 psi | 89% | 2887 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 55,767 psi | 90% | 2864 fps | 96.6% |
| Shooters World Long Rifle | <<locked>> | 98% | 53,505 psi | 86% | 2841 fps | 98.1% |
| Shooters World Match Rifle | <<locked>> | 88% | 53,679 psi | 87% | 2844 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 54,476 psi | 88% | 2848 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 54,172 psi | 87% | 2871 fps | 97.2% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 53,316 psi | 86% | 2900 fps | 99.7% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,709 psi | 90% | 2799 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,259 psi | 89% | 2861 fps | 98.9% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 55,970 psi | 90% | 2887 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,868 psi | 88% | 2759 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,447 psi | 88% | 2753 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 53,751 psi | 87% | 2789 fps | 96.8% |
| Somchem S321 | <<locked>> | 84% | 54,534 psi | 88% | 2854 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 53,896 psi | 87% | 2756 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 55,187 psi | 89% | 2861 fps | 99.8% |
| Somchem S355 | <<locked>> | 96% | 55,680 psi | 90% | 2890 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 46,267 psi | 75% | 2844 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 84% | 54,592 psi | 88% | 2726 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,969 psi | 89% | 2746 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 55,999 psi | 90% | 2822 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 53,940 psi | 87% | 2799 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 53,330 psi | 86% | 2815 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 54,505 psi | 88% | 2894 fps | 99.1% |
| Vihtavuori N530 | <<locked>> | 86% | 53,679 psi | 87% | 2818 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 55,506 psi | 90% | 2841 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 53,519 psi | 86% | 2900 fps | 98.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 39,044 psi | 63% | 2713 fps | 97.1% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 55,390 psi | 89% | 2877 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 53,142 psi | 86% | 2864 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 55,999 psi | 90% | 2963 fps | 97.5% |
| Winchester StaBALL Match | <<locked>> | 90% | 55,709 psi | 90% | 2897 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% | 45,716 psi | 74% | 2635 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 50,212 psi | 81% | 2749 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,595 psi | 62% | 2559 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 45,223 psi | 73% | 2703 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 49,719 psi | 80% | 2723 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 36,463 psi | 59% | 2546 fps | 99.8% |
| Accurate 4350 | <<locked>> | 90% | 36,912 psi | 60% | 2618 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 42,163 psi | 68% | 2654 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 80% | 35,766 psi | 58% | 2500 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,164 psi | 71% | 2667 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 80% | 43,787 psi | 71% | 2657 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,532 psi | 83% | 2871 fps | 99.8% |
| Alliant Power Pro 2000-MR | 31.1 gr | 80% | 38,101 psi | 61% | 2671 fps | 96.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,201 psi | 57% | 2523 fps | 97.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,343 psi | 83% | 2726 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,971 psi | 61% | 2585 fps | 96.7% |
| Alliant Reloder-16 | <<locked>> | 90% | 37,463 psi | 60% | 2635 fps | 95.8% |
| Alliant Reloder-17 | 31.4 gr | 82% | 32,503 psi | 52% | 2536 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 96% | 32,140 psi | 52% | 2526 fps | 95.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 41,133 psi | 66% | 2654 fps | 97% |
| Bofors RP3 | <<locked>> | 80% | 34,708 psi | 56% | 2523 fps | 97.4% |
| Bofors RP7 | <<locked>> | 94% | 49,356 psi | 80% | 2759 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 45,847 psi | 74% | 2654 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,728 psi | 69% | 2687 fps | 99.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,862 psi | 76% | 2822 fps | 98.7% |
| Hodgdon H322 | <<locked>> | 80% | 50,633 psi | 82% | 2769 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,401 psi | 83% | 2792 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 38,232 psi | 62% | 2585 fps | 95.4% |
| Hodgdon H414 | <<locked>> | 94% | 45,672 psi | 74% | 2785 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 42,511 psi | 69% | 2667 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 32,314 psi | 52% | 2477 fps | 95.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,363 psi | 62% | 2635 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 96% | 49,211 psi | 79% | 2864 fps | 95.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,020 psi | 42% | 1552 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,799 psi | 66% | 2618 fps | 98.4% |
| IMR 3031 | <<locked>> | 80% | 41,800 psi | 67% | 2667 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,463 psi | 60% | 2533 fps | 96.7% |
| IMR 4166 Enduron | <<locked>> | 84% | 45,730 psi | 74% | 2667 fps | 95% |
| IMR 4198 | <<locked>> | 80% | 51,880 psi | 84% | 2694 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 49,298 psi | 80% | 2782 fps | 95.3% |
| IMR 4451 Enduron | <<locked>> | 92% | 48,225 psi | 78% | 2743 fps | 95.5% |
| IMR 4831 | <<locked>> | 90% | 35,766 psi | 58% | 2572 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 38,856 psi | 63% | 2618 fps | 97.6% |
| IMR 8208 XBR | <<locked>> | 80% | 44,164 psi | 71% | 2667 fps | 99.4% |
| Lovex D073.5 | <<locked>> | 80% | 49,777 psi | 80% | 2753 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,031 psi | 66% | 2638 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 42,424 psi | 68% | 2595 fps | 98.3% |
| Lovex S062 | <<locked>> | 80% | 37,478 psi | 60% | 2543 fps | 98.4% |
| Lovex S065 | <<locked>> | 90% | 41,742 psi | 67% | 2631 fps | 95.5% |
| Lovex S070 | <<locked>> | 94% | 44,802 psi | 72% | 2707 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 41,452 psi | 67% | 2615 fps | 99.1% |
| Norma 202 | <<locked>> | 80% | 41,437 psi | 67% | 2621 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,333 psi | 60% | 2575 fps | 97.2% |
| Norma URP | <<locked>> | 90% | 37,478 psi | 60% | 2621 fps | 95.7% |
| Ramshot Big Game | <<locked>> | 80% | 36,724 psi | 59% | 2582 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 96% | 44,657 psi | 72% | 2772 fps | 95.8% |
| Ramshot TAC | <<locked>> | 80% | 44,150 psi | 71% | 2667 fps | 96.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,439 psi | 70% | 2687 fps | 98.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,848 psi | 77% | 2717 fps | 99.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,353 psi | 43% | 1591 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,705 psi | 80% | 2753 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 43,874 psi | 71% | 2671 fps | 95.3% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,262 psi | 63% | 2680 fps | 97.1% |
| ReloadSwiss RS 60 | 30.6 gr | 80% | 32,314 psi | 52% | 2543 fps | 98.2% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 36,840 psi | 59% | 2635 fps | 95.2% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 40,147 psi | 65% | 2707 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 45,078 psi | 73% | 2654 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,146 psi | 63% | 2559 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 80% | 32,721 psi | 53% | 2470 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 94% | 49,356 psi | 80% | 2759 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 41,742 psi | 67% | 2631 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,031 psi | 66% | 2638 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 37,478 psi | 60% | 2543 fps | 98.4% |
| Shooters World SW4350 | <<locked>> | 94% | 44,802 psi | 72% | 2707 fps | 95.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,533 psi | 54% | 2513 fps | 95.7% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,315 psi | 84% | 2753 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 42,177 psi | 68% | 2638 fps | 96.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,495 psi | 65% | 2618 fps | 97.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,728 psi | 69% | 2569 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,404 psi | 57% | 2434 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 47,326 psi | 76% | 2687 fps | 95.5% |
| Somchem S321 | <<locked>> | 80% | 47,601 psi | 77% | 2746 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 42,511 psi | 69% | 2575 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,872 psi | 68% | 2638 fps | 98.1% |
| Somchem S355 | <<locked>> | 80% | 33,779 psi | 54% | 2480 fps | 96.5% |
| Somchem S365 | <<locked>> | 84% | 27,659 psi | 45% | 2405 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 48,341 psi | 78% | 2635 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 42,960 psi | 69% | 2569 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,508 psi | 62% | 2549 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,349 psi | 63% | 2559 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 32,010 psi | 52% | 2418 fps | 97.4% |
| Vihtavuori N160 | <<locked>> | 88% | 36,753 psi | 59% | 2569 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 44,135 psi | 71% | 2661 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 80% | 37,681 psi | 61% | 2543 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 90% | 38,682 psi | 62% | 2628 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 96% | 34,069 psi | 55% | 2598 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,429 psi | 49% | 2385 fps | 95% |
| Winchester 748 | <<locked>> | 80% | 43,714 psi | 71% | 2707 fps | 99.8% |
| Winchester 760 | <<locked>> | 94% | 45,672 psi | 74% | 2785 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 40,030 psi | 65% | 2628 fps | 98.3% |
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 GT loaded with the .243 | 100gr | Hornady SP. Alliant Reloder-17 delivers the highest muzzle velocity at 3,005 fps; across all powders the maximum-charge window runs from 1,739 fps to 3,005 fps. Accurate 4350 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 (427 MPa), the top charges use 57–90 %, 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 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 | 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.