Load Specifications
Load data in caliber 6 mm GT with .243 | 115gr | DTAC RBT Closed Nose - Boron Nitride bullet and 99 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 Hodgdon Superformance.
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.
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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>> | 84% | 54,157 psi | 87% | 2546 fps | 100% |
| Accurate 2460 | <<locked>> | 82% | 56,086 psi | 90% | 2621 fps | 100% |
| Accurate 2495 | <<locked>> | 88% | 52,721 psi | 85% | 2572 fps | 100% |
| Accurate 2520 | <<locked>> | 84% | 54,230 psi | 87% | 2631 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 55,680 psi | 90% | 2625 fps | 97.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 39,798 psi | 64% | 2477 fps | 96% |
| Accurate 4064 | <<locked>> | 92% | 55,898 psi | 90% | 2657 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 55,927 psi | 90% | 2749 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 86% | 53,505 psi | 86% | 2651 fps | 100% |
| ADI AR 2208 | <<locked>> | 92% | 54,273 psi | 88% | 2648 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 86% | 55,927 psi | 90% | 2648 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 52,866 psi | 85% | 2572 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 90% | 56,086 psi | 90% | 2808 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 54,099 psi | 87% | 2667 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 90% | 54,592 psi | 88% | 2687 fps | 99.9% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 53,679 psi | 87% | 2749 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 96% | 54,650 psi | 88% | 2782 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 38,130 psi | 61% | 2503 fps | 98.9% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 42,293 psi | 68% | 2648 fps | 98.1% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 52,866 psi | 85% | 2661 fps | 99.7% |
| Bofors RP3 | <<locked>> | 92% | 54,839 psi | 88% | 2684 fps | 100% |
| Bofors RP7 | <<locked>> | 96% | 54,969 psi | 89% | 2654 fps | 97.6% |
| Hodgdon Benchmark | <<locked>> | 84% | 53,983 psi | 87% | 2582 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 86% | 55,071 psi | 89% | 2677 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 53,127 psi | 86% | 2717 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 92% | 55,680 psi | 90% | 2694 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 98% | 54,752 psi | 88% | 2740 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 96% | 55,622 psi | 90% | 2703 fps | 97.1% |
| Hodgdon H4895 | <<locked>> | 86% | 54,012 psi | 87% | 2661 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 49,501 psi | 80% | 2628 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 52,982 psi | 85% | 2687 fps | 100% |
| Hodgdon Superformance | <<locked>> | 98% | 55,695 psi | 90% | 2779 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,288 psi | 57% | 1598 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 54,795 psi | 88% | 2654 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 53,853 psi | 87% | 2638 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 53,621 psi | 86% | 2628 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 88% | 53,635 psi | 87% | 2608 fps | 97.9% |
| IMR 4350ᴾ | <<locked>> | 100% | 55,056 psi | 89% | 2680 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 94% | 53,374 psi | 86% | 2635 fps | 97.8% |
| IMR 4831ᴾ | <<locked>> | 100% | 52,446 psi | 85% | 2684 fps | 99.7% |
| IMR 4895 | <<locked>> | 90% | 55,985 psi | 90% | 2713 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 55,927 psi | 90% | 2648 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 55,753 psi | 90% | 2628 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 53,026 psi | 86% | 2628 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 53,243 psi | 86% | 2582 fps | 100% |
| Lovex S062 | <<locked>> | 90% | 53,592 psi | 86% | 2628 fps | 100% |
| Lovex S065 | <<locked>> | 98% | 55,796 psi | 90% | 2674 fps | 99.2% |
| Lovex S070 | <<locked>> | 98% | 53,403 psi | 86% | 2661 fps | 98.1% |
| Norma 201 | <<locked>> | 88% | 55,463 psi | 89% | 2641 fps | 100% |
| Norma 202 | <<locked>> | 86% | 52,678 psi | 85% | 2598 fps | 100% |
| Norma 203B | <<locked>> | 90% | 53,766 psi | 87% | 2674 fps | 100% |
| Norma 204ᴾ | <<locked>> | 100% | 55,738 psi | 90% | 2726 fps | 96.6% |
| Norma URPᴾ | <<locked>> | 100% | 54,781 psi | 88% | 2733 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 90% | 54,114 psi | 87% | 2697 fps | 100% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 53,635 psi | 87% | 2733 fps | 98.8% |
| Ramshot TAC | <<locked>> | 84% | 52,388 psi | 84% | 2615 fps | 98.9% |
| Ramshot Wild Boar | <<locked>> | 86% | 55,695 psi | 90% | 2687 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 53,214 psi | 86% | 2602 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,071 psi | 58% | 1640 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 55,013 psi | 89% | 2625 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 52,678 psi | 85% | 2631 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 88% | 55,013 psi | 89% | 2749 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 54,578 psi | 88% | 2782 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 55,288 psi | 89% | 2769 fps | 99.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 55,143 psi | 89% | 2795 fps | 99.6% |
| Rottweil R 901 | <<locked>> | 84% | 53,084 psi | 86% | 2575 fps | 100% |
| Rottweil R 902 | <<locked>> | 90% | 55,782 psi | 90% | 2638 fps | 100% |
| Rottweil R 903 | <<locked>> | 94% | 54,186 psi | 87% | 2671 fps | 100% |
| Rottweil R 907 | <<locked>> | 96% | 54,969 psi | 89% | 2654 fps | 97.6% |
| Shooters World Long Rifle | <<locked>> | 98% | 55,796 psi | 90% | 2674 fps | 99.2% |
| Shooters World Match Rifle | <<locked>> | 86% | 53,026 psi | 86% | 2628 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 53,592 psi | 86% | 2628 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 53,403 psi | 86% | 2661 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 94% | 55,941 psi | 90% | 2730 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 54,404 psi | 88% | 2648 fps | 99.4% |
| SNPE Vectan SP 9 | <<locked>> | 88% | 54,911 psi | 89% | 2667 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 53,896 psi | 87% | 2539 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 53,766 psi | 87% | 2536 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 53,127 psi | 86% | 2585 fps | 97.8% |
| Somchem S321 | <<locked>> | 82% | 53,258 psi | 86% | 2628 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 52,982 psi | 85% | 2536 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 53,954 psi | 87% | 2638 fps | 100% |
| Somchem S355 | <<locked>> | 94% | 54,853 psi | 88% | 2671 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 49,197 psi | 79% | 2690 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 53,693 psi | 87% | 2503 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 54,186 psi | 87% | 2526 fps | 100% |
| Vihtavuori N135 | <<locked>> | 90% | 55,796 psi | 90% | 2605 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 52,968 psi | 85% | 2575 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 52,562 psi | 85% | 2602 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 53,925 psi | 87% | 2684 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 84% | 52,808 psi | 85% | 2598 fps | 100% |
| Vihtavuori N540 | <<locked>> | 90% | 54,520 psi | 88% | 2618 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 52,736 psi | 85% | 2687 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 41,626 psi | 67% | 2575 fps | 98.8% |
| Winchester 6.5 StaBALL | <<locked>> | 98% | 53,998 psi | 87% | 2661 fps | 100% |
| Winchester 748 | <<locked>> | 86% | 55,956 psi | 90% | 2690 fps | 100% |
| Winchester 760 | <<locked>> | 98% | 55,259 psi | 89% | 2749 fps | 98.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 34,214 psi | 55% | 2507 fps | 98.7% |
| Winchester StaBALL Match | <<locked>> | 88% | 54,998 psi | 89% | 2677 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% | 47,950 psi | 77% | 2464 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 52,620 psi | 85% | 2575 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 40,611 psi | 66% | 2398 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 47,572 psi | 77% | 2539 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 45,571 psi | 74% | 2467 fps | 95.4% |
| Accurate 3100 | <<locked>> | 98% | 37,101 psi | 60% | 2425 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 38,435 psi | 62% | 2395 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 32,184 psi | 52% | 2329 fps | 95.4% |
| ADI AR 2206H | <<locked>> | 80% | 44,179 psi | 71% | 2500 fps | 99.4% |
| ADI AR 2208 | <<locked>> | 80% | 37,608 psi | 61% | 2362 fps | 97.6% |
| ADI Benchmark 8208 | <<locked>> | 80% | 46,238 psi | 75% | 2507 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 46,470 psi | 75% | 2490 fps | 100% |
| Alliant Power Pro 2000-MR | 29.2 gr | 80% | 40,089 psi | 65% | 2533 fps | 98.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 37,333 psi | 60% | 2388 fps | 98.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 39,900 psi | 64% | 2441 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 84% | 32,677 psi | 53% | 2339 fps | 95.5% |
| Alliant Reloder-17 | <<locked>> | 80% | 31,894 psi | 51% | 2352 fps | 97.1% |
| Alliant Reloder-23 | <<locked>> | 90% | 28,326 psi | 46% | 2257 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 94% | 34,432 psi | 56% | 2470 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 43,337 psi | 70% | 2507 fps | 98.6% |
| Bofors RP3 | <<locked>> | 80% | 36,738 psi | 59% | 2388 fps | 98.9% |
| Bofors RP7 | <<locked>> | 90% | 45,759 psi | 74% | 2510 fps | 95.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 48,066 psi | 78% | 2493 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 45,020 psi | 73% | 2530 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 49,748 psi | 80% | 2667 fps | 99.7% |
| Hodgdon H380 | <<locked>> | 80% | 37,594 psi | 61% | 2388 fps | 96.6% |
| Hodgdon H414 | <<locked>> | 90% | 42,105 psi | 68% | 2530 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 90% | 46,383 psi | 75% | 2559 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 44,556 psi | 72% | 2510 fps | 99.7% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 28,253 psi | 46% | 2201 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 40,393 psi | 65% | 2484 fps | 99.5% |
| Hodgdon Superformance | 34.9 gr | 92% | 44,947 psi | 72% | 2602 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,295 psi | 42% | 1427 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 42,728 psi | 69% | 2464 fps | 99.4% |
| IMR 3031 | <<locked>> | 80% | 44,295 psi | 71% | 2503 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 39,450 psi | 64% | 2392 fps | 98.3% |
| IMR 4166 Enduron | <<locked>> | 80% | 42,047 psi | 68% | 2411 fps | 95.3% |
| IMR 4350 | <<locked>> | 94% | 45,498 psi | 73% | 2530 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 86% | 41,887 psi | 68% | 2441 fps | 95.2% |
| IMR 4831 | <<locked>> | 84% | 31,314 psi | 51% | 2293 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 40,857 psi | 66% | 2470 fps | 99% |
| IMR 8208 XBR | <<locked>> | 80% | 46,238 psi | 75% | 2507 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 80% | 52,344 psi | 84% | 2585 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 43,120 psi | 70% | 2480 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 44,425 psi | 72% | 2444 fps | 99.4% |
| Lovex S062 | <<locked>> | 80% | 39,523 psi | 64% | 2398 fps | 99.5% |
| Lovex S065 | <<locked>> | 84% | 36,434 psi | 59% | 2339 fps | 95.2% |
| Lovex S070 | <<locked>> | 90% | 41,742 psi | 67% | 2467 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 43,308 psi | 70% | 2457 fps | 99.8% |
| Norma 202 | <<locked>> | 80% | 43,729 psi | 71% | 2464 fps | 100% |
| Norma 203B | <<locked>> | 80% | 39,262 psi | 63% | 2431 fps | 98.7% |
| Norma 204 | <<locked>> | 96% | 48,834 psi | 79% | 2621 fps | 95% |
| Norma URP | <<locked>> | 84% | 32,764 psi | 53% | 2336 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 38,783 psi | 63% | 2444 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 38,609 psi | 62% | 2467 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 45,890 psi | 74% | 2510 fps | 97.9% |
| Ramshot Wild Boar | <<locked>> | 80% | 45,643 psi | 74% | 2536 fps | 99.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 49,588 psi | 80% | 2549 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,716 psi | 43% | 1463 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 51,590 psi | 83% | 2575 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 40,538 psi | 65% | 2425 fps | 95.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 41,872 psi | 68% | 2539 fps | 98.7% |
| ReloadSwiss RS 60 | 28.7 gr | 80% | 33,939 psi | 55% | 2411 fps | 99.6% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 34,316 psi | 55% | 2398 fps | 95.8% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 36,767 psi | 59% | 2457 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 47,152 psi | 76% | 2487 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 41,133 psi | 66% | 2411 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 34,577 psi | 56% | 2336 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 90% | 45,759 psi | 74% | 2510 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 84% | 36,434 psi | 59% | 2339 fps | 95.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 43,120 psi | 70% | 2480 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 39,523 psi | 64% | 2398 fps | 99.5% |
| Shooters World SW4350 | <<locked>> | 90% | 41,742 psi | 67% | 2467 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 35,520 psi | 57% | 2382 fps | 97.7% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 44,382 psi | 72% | 2490 fps | 98.1% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 42,627 psi | 69% | 2470 fps | 99.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 44,643 psi | 72% | 2408 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 37,101 psi | 60% | 2287 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 40,741 psi | 66% | 2388 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 49,966 psi | 81% | 2582 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 44,251 psi | 71% | 2411 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 44,135 psi | 71% | 2487 fps | 99.3% |
| Somchem S355 | <<locked>> | 80% | 35,433 psi | 57% | 2339 fps | 98.2% |
| Somchem S365 | <<locked>> | 80% | 25,831 psi | 42% | 2188 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 50,372 psi | 81% | 2461 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 44,962 psi | 73% | 2402 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 40,596 psi | 65% | 2392 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 41,220 psi | 66% | 2402 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 33,707 psi | 54% | 2283 fps | 98.9% |
| Vihtavuori N160 | <<locked>> | 82% | 32,039 psi | 52% | 2287 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 46,325 psi | 75% | 2503 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 39,711 psi | 64% | 2395 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 33,504 psi | 54% | 2336 fps | 95.4% |
| Vihtavuori N555 | <<locked>> | 90% | 30,023 psi | 48% | 2323 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 29,921 psi | 48% | 2215 fps | 96.4% |
| Winchester 748 | <<locked>> | 80% | 45,977 psi | 74% | 2546 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 42,525 psi | 69% | 2539 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 94% | 28,094 psi | 45% | 2316 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 42,105 psi | 68% | 2477 fps | 99.4% |
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 99 powders for 6 mm GT loaded with the .243 | 115gr | DTAC RBT Closed Nose - Boron Nitride. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,808 fps; across all powders the maximum-charge window runs from 1,598 fps to 2,808 fps. Accurate 3100 gives the best case fill at 100 %, and 99 of the 99 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (427 MPa), the top charges use 55–90 %, leaving at least 10 % headroom. The 115.0 gr projectile in 0.243" calls for a 1:7.5 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, Hodgdon Superformance rank at the top here: for 6 mm GT with the .243 | 115gr | DTAC RBT Closed Nose - Boron Nitride 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.