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 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:1:8.0
Load data in caliber 6 mm GT 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 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% | 55,042 psi | 89% | 2690 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 53,185 psi | 86% | 2710 fps | 100% |
| Accurate 2495 | <<locked>> | 90% | 52,982 psi | 85% | 2710 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 55,027 psi | 89% | 2772 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 53,055 psi | 86% | 2700 fps | 96.1% |
| Accurate 4064 | <<locked>> | 92% | 52,997 psi | 85% | 2753 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 52,214 psi | 84% | 2822 fps | 99.2% |
| ADI AR 2206H | <<locked>> | 88% | 53,983 psi | 87% | 2785 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 94% | 54,766 psi | 88% | 2779 fps | 99.6% |
| ADI Benchmark 8208 | <<locked>> | 86% | 53,171 psi | 86% | 2740 fps | 100% |
| Alliant AR-Comp | <<locked>> | 86% | 53,388 psi | 86% | 2717 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 82% | 54,839 psi | 88% | 2841 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 53,563 psi | 86% | 2897 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 54,795 psi | 88% | 2805 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 54,795 psi | 88% | 2694 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 55,332 psi | 89% | 2825 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 50,720 psi | 82% | 2825 fps | 99.2% |
| Alliant Reloder-17 | <<locked>> | 98% | 55,303 psi | 89% | 2920 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 35,897 psi | 58% | 2559 fps | 97.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 39,740 psi | 64% | 2700 fps | 96.1% |
| Baschieri & Pellagri 107 | <<locked>> | 88% | 53,447 psi | 86% | 2792 fps | 99.3% |
| Bofors RP3 | <<locked>> | 94% | 55,317 psi | 89% | 2822 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 55,753 psi | 90% | 2785 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 86% | 54,911 psi | 89% | 2720 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 55,695 psi | 90% | 2818 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 84% | 54,186 psi | 87% | 2864 fps | 99.7% |
| Hodgdon H322 | <<locked>> | 82% | 53,896 psi | 87% | 2736 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 54,926 psi | 89% | 2762 fps | 100% |
| Hodgdon H380 | <<locked>> | 92% | 52,794 psi | 85% | 2779 fps | 98.8% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 55,332 psi | 89% | 2874 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 88% | 54,520 psi | 88% | 2795 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 46,992 psi | 76% | 2710 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 53,519 psi | 86% | 2825 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 52,649 psi | 85% | 2848 fps | 96.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,201 psi | 57% | 1680 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 55,840 psi | 90% | 2799 fps | 100% |
| IMR 3031 | <<locked>> | 88% | 54,389 psi | 88% | 2782 fps | 100% |
| IMR 4064 | <<locked>> | 92% | 54,694 psi | 88% | 2769 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 90% | 54,737 psi | 88% | 2743 fps | 97.3% |
| IMR 4198 | <<locked>> | 82% | 54,636 psi | 88% | 2648 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 52,069 psi | 84% | 2753 fps | 96.2% |
| IMR 4451 Enduron | <<locked>> | 96% | 54,157 psi | 87% | 2766 fps | 97.1% |
| IMR 4831ᴾ | <<locked>> | 100% | 49,603 psi | 80% | 2766 fps | 98.9% |
| IMR 4895 | <<locked>> | 90% | 53,272 psi | 86% | 2805 fps | 99.8% |
| IMR 8208 XBR | <<locked>> | 86% | 53,171 psi | 86% | 2740 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 53,214 psi | 86% | 2723 fps | 100% |
| Lovex D073.6 | <<locked>> | 88% | 53,214 psi | 86% | 2759 fps | 100% |
| Lovex S060 | <<locked>> | 88% | 54,099 psi | 87% | 2717 fps | 99.8% |
| Lovex S062 | <<locked>> | 92% | 53,969 psi | 87% | 2762 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 53,417 psi | 86% | 2759 fps | 98.3% |
| Lovex S070ᴾ | <<locked>> | 100% | 53,853 psi | 87% | 2789 fps | 97.4% |
| Norma 201 | <<locked>> | 90% | 56,072 psi | 90% | 2779 fps | 100% |
| Norma 202 | <<locked>> | 88% | 53,243 psi | 86% | 2736 fps | 100% |
| Norma 203B | <<locked>> | 92% | 54,491 psi | 88% | 2812 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 51,372 psi | 83% | 2808 fps | 99% |
| Ramshot Big Game | <<locked>> | 92% | 54,984 psi | 89% | 2838 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 50,299 psi | 81% | 2802 fps | 97.5% |
| Ramshot TAC | <<locked>> | 86% | 53,664 psi | 87% | 2756 fps | 98.5% |
| Ramshot Wild Boar | <<locked>> | 86% | 53,011 psi | 86% | 2776 fps | 99.8% |
| Ramshot X-Terminator | <<locked>> | 84% | 54,244 psi | 87% | 2743 fps | 99.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,491 psi | 57% | 1719 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 52,881 psi | 85% | 2723 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 92% | 53,301 psi | 86% | 2759 fps | 97.6% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 55,463 psi | 89% | 2887 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 54,824 psi | 88% | 2920 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 51,822 psi | 84% | 2844 fps | 99% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 52,214 psi | 84% | 2867 fps | 98.7% |
| Rottweil R 901 | <<locked>> | 86% | 53,896 psi | 87% | 2717 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 53,432 psi | 86% | 2733 fps | 100% |
| Rottweil R 903 | <<locked>> | 96% | 54,708 psi | 88% | 2805 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 55,753 psi | 90% | 2785 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 98% | 53,417 psi | 86% | 2759 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 88% | 53,214 psi | 86% | 2759 fps | 100% |
| Shooters World Precision | <<locked>> | 92% | 53,969 psi | 87% | 2762 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 53,853 psi | 87% | 2789 fps | 97.4% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 55,999 psi | 90% | 2743 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 53,287 psi | 86% | 2818 fps | 99.8% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 55,390 psi | 89% | 2710 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 55,085 psi | 89% | 2779 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 55,666 psi | 90% | 2802 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 54,491 psi | 88% | 2674 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 94% | 54,418 psi | 88% | 2674 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 98% | 53,795 psi | 87% | 2713 fps | 97.1% |
| Somchem S321 | <<locked>> | 84% | 54,085 psi | 87% | 2769 fps | 100% |
| Somchem S335 | <<locked>> | 88% | 53,693 psi | 87% | 2674 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 54,592 psi | 88% | 2772 fps | 99.8% |
| Somchem S355 | <<locked>> | 96% | 55,463 psi | 89% | 2808 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 45,977 psi | 74% | 2762 fps | 100% |
| Vihtavuori N130 | <<locked>> | 84% | 54,404 psi | 88% | 2641 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 54,592 psi | 88% | 2661 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 52,736 psi | 85% | 2700 fps | 100% |
| Vihtavuori N140 | <<locked>> | 90% | 53,925 psi | 87% | 2717 fps | 100% |
| Vihtavuori N150 | <<locked>> | 96% | 53,200 psi | 86% | 2736 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 54,172 psi | 87% | 2812 fps | 99.2% |
| Vihtavuori N530 | <<locked>> | 86% | 53,476 psi | 86% | 2736 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 55,288 psi | 89% | 2759 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 53,330 psi | 86% | 2818 fps | 99.1% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 38,682 psi | 62% | 2635 fps | 97.3% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 55,114 psi | 89% | 2795 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 53,156 psi | 86% | 2782 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 55,869 psi | 90% | 2881 fps | 97.7% |
| Winchester StaBALL Match | <<locked>> | 90% | 55,579 psi | 90% | 2815 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% | 45,788 psi | 74% | 2559 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 49,908 psi | 80% | 2664 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 38,334 psi | 62% | 2480 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 44,904 psi | 72% | 2621 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 49,385 psi | 80% | 2644 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 36,230 psi | 58% | 2470 fps | 99.8% |
| Accurate 4350 | <<locked>> | 88% | 34,418 psi | 56% | 2490 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 42,047 psi | 68% | 2579 fps | 98.5% |
| ADI AR 2208 | <<locked>> | 80% | 35,853 psi | 58% | 2434 fps | 96.2% |
| ADI Benchmark 8208 | <<locked>> | 80% | 44,077 psi | 71% | 2589 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 80% | 43,932 psi | 71% | 2582 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 51,372 psi | 83% | 2789 fps | 99.9% |
| Alliant Power Pro 2000-MR | 29.8 gr | 80% | 37,898 psi | 61% | 2595 fps | 96.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 35,041 psi | 57% | 2451 fps | 97.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 51,358 psi | 83% | 2648 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 37,826 psi | 61% | 2513 fps | 97% |
| Alliant Reloder-16 | <<locked>> | 88% | 35,128 psi | 57% | 2507 fps | 95.2% |
| Alliant Reloder-17 | 29.4 gr | 80% | 30,400 psi | 49% | 2411 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 96% | 32,010 psi | 52% | 2457 fps | 95.7% |
| Alliant Reloder-26 | <<locked>> | 98% | 37,260 psi | 60% | 2641 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 40,944 psi | 66% | 2575 fps | 97.3% |
| Bofors RP3 | <<locked>> | 80% | 34,635 psi | 56% | 2454 fps | 97.7% |
| Bofors RP7 | <<locked>> | 94% | 49,124 psi | 79% | 2680 fps | 95.5% |
| Hodgdon Benchmark | <<locked>> | 80% | 46,079 psi | 74% | 2585 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 80% | 42,467 psi | 68% | 2605 fps | 99.6% |
| Hodgdon CFE223 | <<locked>> | 80% | 46,688 psi | 75% | 2743 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 80% | 50,473 psi | 81% | 2687 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 51,111 psi | 82% | 2707 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 37,942 psi | 61% | 2507 fps | 95.7% |
| Hodgdon H414 | <<locked>> | 94% | 45,600 psi | 74% | 2710 fps | 95.5% |
| Hodgdon H4895 | <<locked>> | 80% | 42,366 psi | 68% | 2592 fps | 98.9% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 30,139 psi | 49% | 2352 fps | 95.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 38,058 psi | 61% | 2556 fps | 98.5% |
| Hodgdon Superformance | <<locked>> | 96% | 49,356 psi | 80% | 2792 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,034 psi | 42% | 1499 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 40,698 psi | 66% | 2543 fps | 98.6% |
| IMR 3031 | <<locked>> | 80% | 41,916 psi | 68% | 2592 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 37,623 psi | 61% | 2467 fps | 97% |
| IMR 4166 Enduron | <<locked>> | 84% | 45,498 psi | 73% | 2589 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 51,677 psi | 83% | 2608 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 48,892 psi | 79% | 2700 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 90% | 45,034 psi | 73% | 2612 fps | 95% |
| IMR 4831 | <<locked>> | 90% | 35,708 psi | 58% | 2503 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 38,711 psi | 62% | 2543 fps | 97.8% |
| IMR 8208 XBR | <<locked>> | 80% | 44,077 psi | 71% | 2589 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 80% | 49,545 psi | 80% | 2671 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 41,017 psi | 66% | 2566 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 42,206 psi | 68% | 2516 fps | 98.5% |
| Lovex S062 | <<locked>> | 80% | 37,246 psi | 60% | 2467 fps | 98.5% |
| Lovex S065 | <<locked>> | 88% | 39,131 psi | 63% | 2507 fps | 95% |
| Lovex S070 | <<locked>> | 94% | 44,556 psi | 72% | 2631 fps | 95.3% |
| Norma 201 | <<locked>> | 80% | 41,249 psi | 67% | 2536 fps | 99.2% |
| Norma 202 | <<locked>> | 80% | 41,220 psi | 66% | 2543 fps | 100% |
| Norma 203B | <<locked>> | 80% | 37,202 psi | 60% | 2503 fps | 97.4% |
| Norma URP | <<locked>> | 88% | 35,085 psi | 57% | 2497 fps | 95.1% |
| Ramshot Big Game | <<locked>> | 80% | 36,535 psi | 59% | 2510 fps | 97% |
| Ramshot Hunter | <<locked>> | 94% | 41,727 psi | 67% | 2644 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 44,005 psi | 71% | 2592 fps | 96.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 43,207 psi | 70% | 2608 fps | 98.6% |
| Ramshot X-Terminator | <<locked>> | 80% | 47,630 psi | 77% | 2638 fps | 99.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,382 psi | 43% | 1535 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 49,168 psi | 79% | 2667 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 43,859 psi | 71% | 2598 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 39,276 psi | 63% | 2608 fps | 97.4% |
| ReloadSwiss RS 60 | 29.4 gr | 80% | 32,401 psi | 52% | 2480 fps | 98.5% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 36,709 psi | 59% | 2562 fps | 95.5% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 39,842 psi | 64% | 2628 fps | 95.5% |
| Rottweil R 901 | <<locked>> | 80% | 45,121 psi | 73% | 2579 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 39,247 psi | 63% | 2490 fps | 98.9% |
| Rottweil R 903 | <<locked>> | 80% | 32,605 psi | 53% | 2398 fps | 96.7% |
| Rottweil R 907 | <<locked>> | 94% | 49,124 psi | 79% | 2680 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 88% | 39,131 psi | 63% | 2507 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 80% | 41,017 psi | 66% | 2566 fps | 99.9% |
| Shooters World Precision | <<locked>> | 80% | 37,246 psi | 60% | 2467 fps | 98.5% |
| Shooters World SW4350 | <<locked>> | 94% | 44,556 psi | 72% | 2631 fps | 95.3% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 52,054 psi | 84% | 2687 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 33,562 psi | 54% | 2444 fps | 96% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 52,344 psi | 84% | 2671 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 41,945 psi | 68% | 2559 fps | 96.7% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 40,466 psi | 65% | 2546 fps | 98.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 42,772 psi | 69% | 2497 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 35,404 psi | 57% | 2365 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 47,152 psi | 76% | 2608 fps | 95.7% |
| Somchem S321 | <<locked>> | 80% | 47,369 psi | 76% | 2664 fps | 99.9% |
| Somchem S335 | <<locked>> | 80% | 42,264 psi | 68% | 2497 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 41,698 psi | 67% | 2562 fps | 98.3% |
| Somchem S355 | <<locked>> | 80% | 33,605 psi | 54% | 2408 fps | 96.8% |
| Somchem S365 | <<locked>> | 84% | 27,441 psi | 44% | 2336 fps | 95.5% |
| Vihtavuori N130 | <<locked>> | 80% | 48,341 psi | 78% | 2559 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 43,018 psi | 69% | 2493 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 38,508 psi | 62% | 2477 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 39,175 psi | 63% | 2484 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 31,850 psi | 51% | 2349 fps | 97.6% |
| Vihtavuori N160 | <<locked>> | 88% | 36,651 psi | 59% | 2497 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 80% | 44,063 psi | 71% | 2585 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 80% | 37,637 psi | 61% | 2470 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 36,056 psi | 58% | 2500 fps | 95.2% |
| Vihtavuori N555 | <<locked>> | 96% | 33,910 psi | 55% | 2526 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 30,371 psi | 49% | 2323 fps | 95.4% |
| Winchester 748 | <<locked>> | 80% | 43,395 psi | 70% | 2628 fps | 99.8% |
| Winchester 760 | <<locked>> | 94% | 45,600 psi | 74% | 2710 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 39,755 psi | 64% | 2549 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 102 powders for 6 mm GT loaded with the .243 | 77gr | Lapua Open Tip. Alliant Reloder-17 delivers the highest muzzle velocity at 2,920 fps; across all powders the maximum-charge window runs from 1,680 fps to 2,920 fps. Accurate 4350 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 (427 MPa), the top charges use 57–90 %, 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 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 | 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.