Load Specifications
Load data in caliber 6 mm GT with .243 | 88gr | Warner Tool Co. Flat Line bullet and 85 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, Hodgdon CFE223 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.
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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>> | 90% | 54,824 psi | 88% | 2936 fps | 100% |
| Accurate 2200 | <<locked>> | 82% | 55,042 psi | 89% | 3028 fps | 98.4% |
| Accurate 2230 | <<locked>> | 82% | 55,854 psi | 90% | 3035 fps | 98.7% |
| Accurate 2460 | <<locked>> | 86% | 53,461 psi | 86% | 2956 fps | 100% |
| Accurate 2495 | <<locked>> | 96% | 55,129 psi | 89% | 2989 fps | 100% |
| Accurate 2520 | <<locked>> | 90% | 54,868 psi | 88% | 3018 fps | 100% |
| Accurate 4064 | <<locked>> | 98% | 54,766 psi | 88% | 3028 fps | 100% |
| Accurate LT-30 | <<locked>> | 84% | 55,042 psi | 89% | 2887 fps | 100% |
| Accurate LT-32 | <<locked>> | 84% | 55,492 psi | 90% | 2910 fps | 100% |
| ADI AR 2206H | <<locked>> | 92% | 53,969 psi | 87% | 3018 fps | 98.9% |
| ADI AR 2208 | <<locked>> | 98% | 54,882 psi | 89% | 3009 fps | 98.5% |
| ADI AR 2219 | <<locked>> | 84% | 55,216 psi | 89% | 3005 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 90% | 53,359 psi | 86% | 2976 fps | 99.5% |
| Alliant AR-Comp | <<locked>> | 92% | 56,014 psi | 90% | 3012 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 86% | 54,186 psi | 87% | 3081 fps | 99.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 53,026 psi | 86% | 3114 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 98% | 53,708 psi | 87% | 3028 fps | 99.4% |
| Alliant Reloder-10x | <<locked>> | 86% | 54,462 psi | 88% | 2943 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 96% | 54,882 psi | 89% | 3054 fps | 98.7% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 50,966 psi | 82% | 3077 fps | 99% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 53,983 psi | 87% | 2874 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 53,359 psi | 86% | 3022 fps | 98% |
| Bofors RP3 | <<locked>> | 98% | 53,853 psi | 87% | 3038 fps | 99.5% |
| Hodgdon Benchmark | <<locked>> | 90% | 55,579 psi | 90% | 2966 fps | 99.9% |
| Hodgdon BL-C2 | <<locked>> | 92% | 55,593 psi | 90% | 3058 fps | 99.9% |
| Hodgdon CFE223 | <<locked>> | 88% | 53,200 psi | 86% | 3091 fps | 98.5% |
| Hodgdon H322 | <<locked>> | 86% | 53,722 psi | 87% | 2982 fps | 100% |
| Hodgdon H335 | <<locked>> | 86% | 54,897 psi | 89% | 3009 fps | 100% |
| Hodgdon H380 | <<locked>> | 98% | 55,796 psi | 90% | 3051 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 92% | 54,389 psi | 88% | 3031 fps | 99.3% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 40,219 psi | 65% | 2789 fps | 96.5% |
| Hodgdon LEVERevolution | <<locked>> | 94% | 52,489 psi | 85% | 3051 fps | 99.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,577 psi | 56% | 1831 fps | 100% |
| Hodgdon VARGET | <<locked>> | 94% | 56,014 psi | 90% | 3035 fps | 99.4% |
| IMR 3031 | <<locked>> | 92% | 53,301 psi | 86% | 3025 fps | 100% |
| IMR 4064 | <<locked>> | 96% | 54,302 psi | 88% | 2992 fps | 98.6% |
| IMR 4198 | <<locked>> | 86% | 54,940 psi | 89% | 2904 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 52,750 psi | 85% | 3031 fps | 98.8% |
| IMR 8208 XBR | <<locked>> | 90% | 53,359 psi | 86% | 2976 fps | 99.5% |
| Lovex D073.5 | <<locked>> | 86% | 53,461 psi | 86% | 2966 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 92% | 52,402 psi | 85% | 2992 fps | 100% |
| Lovex S060 | <<locked>> | 92% | 54,288 psi | 88% | 2946 fps | 98.9% |
| Lovex S062 | <<locked>> | 96% | 53,243 psi | 86% | 2986 fps | 99.6% |
| Norma 200 | <<locked>> | 82% | 54,491 psi | 88% | 2917 fps | 100% |
| Norma 201 | <<locked>> | 94% | 55,666 psi | 90% | 3012 fps | 99.7% |
| Norma 202 | <<locked>> | 92% | 52,649 psi | 85% | 2972 fps | 100% |
| Norma 203B | <<locked>> | 96% | 53,983 psi | 87% | 3038 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 96% | 54,462 psi | 88% | 3064 fps | 98.9% |
| Ramshot TAC | <<locked>> | 90% | 53,679 psi | 87% | 2976 fps | 96.6% |
| Ramshot Wild Boar | <<locked>> | 90% | 52,620 psi | 85% | 2999 fps | 98.7% |
| Ramshot X-Terminator | <<locked>> | 88% | 54,433 psi | 88% | 2972 fps | 98.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,722 psi | 56% | 1870 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 52,707 psi | 85% | 2959 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 54,201 psi | 87% | 3114 fps | 98.6% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 54,476 psi | 88% | 3153 fps | 100% |
| Rottweil R 901 | <<locked>> | 90% | 53,751 psi | 87% | 2959 fps | 100% |
| Rottweil R 902 | <<locked>> | 94% | 52,968 psi | 85% | 2959 fps | 99.5% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 53,722 psi | 87% | 3028 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 92% | 52,402 psi | 85% | 2992 fps | 100% |
| Shooters World Precision | <<locked>> | 96% | 53,243 psi | 86% | 2986 fps | 99.6% |
| Shooters World Tactical Rifle | <<locked>> | 84% | 53,011 psi | 86% | 2930 fps | 99.3% |
| SNPE Vectan BA6 1/2 | <<locked>> | 82% | 55,477 psi | 89% | 2635 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 84% | 55,854 psi | 90% | 3015 fps | 100% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 55,724 psi | 90% | 3091 fps | 99.1% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 55,579 psi | 90% | 2966 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 92% | 55,274 psi | 89% | 3009 fps | 97.5% |
| SNPE Vectan SP 9 | <<locked>> | 94% | 55,448 psi | 89% | 3035 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 92% | 54,810 psi | 88% | 2917 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 54,288 psi | 88% | 2907 fps | 100% |
| Somchem S321 | <<locked>> | 88% | 54,375 psi | 88% | 3012 fps | 99.7% |
| Somchem S335 | <<locked>> | 92% | 54,012 psi | 87% | 2917 fps | 100% |
| Somchem S341 | <<locked>> | 92% | 54,592 psi | 88% | 3002 fps | 98.9% |
| Somchem S355ᴾ | <<locked>> | 100% | 54,389 psi | 88% | 3028 fps | 99.3% |
| Somchem S365ᴾ | <<locked>> | 100% | 39,247 psi | 63% | 2844 fps | 97.8% |
| Vihtavuori N130 | <<locked>> | 88% | 54,810 psi | 88% | 2894 fps | 100% |
| Vihtavuori N133 | <<locked>> | 92% | 54,636 psi | 88% | 2904 fps | 100% |
| Vihtavuori N135 | <<locked>> | 96% | 54,897 psi | 89% | 2979 fps | 100% |
| Vihtavuori N140 | <<locked>> | 94% | 53,272 psi | 86% | 2949 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 52,663 psi | 85% | 2959 fps | 99.7% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 46,615 psi | 75% | 2907 fps | 96.2% |
| Vihtavuori N530 | <<locked>> | 90% | 53,737 psi | 87% | 2976 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 96% | 54,955 psi | 89% | 2995 fps | 100% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 47,790 psi | 77% | 2890 fps | 98.4% |
| Winchester 748 | <<locked>> | 90% | 52,533 psi | 85% | 3018 fps | 99.8% |
| Winchester StaBALL Match | <<locked>> | 94% | 55,492 psi | 90% | 3051 fps | 99.4% |
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% | 40,016 psi | 65% | 2690 fps | 100% |
| Accurate 2200 | <<locked>> | 80% | 51,576 psi | 83% | 2969 fps | 97.8% |
| Accurate 2230 | <<locked>> | 80% | 52,301 psi | 84% | 2979 fps | 98.3% |
| Accurate 2460 | <<locked>> | 80% | 43,337 psi | 70% | 2785 fps | 99.5% |
| Accurate 2495 | <<locked>> | 80% | 32,474 psi | 52% | 2582 fps | 99.7% |
| Accurate 2520 | <<locked>> | 80% | 38,841 psi | 63% | 2733 fps | 98.7% |
| Accurate 4064 | <<locked>> | 80% | 30,748 psi | 50% | 2556 fps | 97.5% |
| Accurate LT-30 | <<locked>> | 80% | 48,530 psi | 78% | 2785 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 48,907 psi | 79% | 2805 fps | 99.8% |
| ADI AR 2206H | <<locked>> | 80% | 36,666 psi | 59% | 2677 fps | 95% |
| ADI AR 2208 | <<locked>> | 88% | 40,089 psi | 65% | 2733 fps | 95.2% |
| ADI AR 2219 | <<locked>> | 80% | 48,486 psi | 78% | 2900 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 80% | 38,624 psi | 62% | 2697 fps | 97% |
| Alliant AR-Comp | <<locked>> | 80% | 37,362 psi | 60% | 2717 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 44,498 psi | 72% | 2904 fps | 97.9% |
| Alliant Power Pro 2000-MR | 33 gr | 88% | 43,497 psi | 70% | 2923 fps | 95.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 34,548 psi | 56% | 2651 fps | 95.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 45,237 psi | 73% | 2799 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 39,610 psi | 64% | 2766 fps | 95.3% |
| Alliant Reloder-17 | <<locked>> | 90% | 36,506 psi | 59% | 2766 fps | 95% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 47,514 psi | 77% | 2776 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 40,857 psi | 66% | 2785 fps | 95% |
| Bofors RP3 | <<locked>> | 84% | 33,895 psi | 55% | 2644 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 40,872 psi | 66% | 2703 fps | 98.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 36,869 psi | 59% | 2710 fps | 97.2% |
| Hodgdon CFE223 | 30.7 gr | 80% | 40,437 psi | 65% | 2838 fps | 95.5% |
| Hodgdon H322 | <<locked>> | 80% | 44,106 psi | 71% | 2822 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 45,005 psi | 73% | 2844 fps | 99.8% |
| Hodgdon H380 | <<locked>> | 92% | 45,905 psi | 74% | 2881 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 36,898 psi | 60% | 2687 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 37,695 psi | 61% | 2733 fps | 95.7% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 35,273 psi | 57% | 2697 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,556 psi | 41% | 1634 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 35,534 psi | 57% | 2638 fps | 95.1% |
| IMR 3031 | <<locked>> | 80% | 35,766 psi | 58% | 2707 fps | 99.7% |
| IMR 4064 | <<locked>> | 86% | 39,813 psi | 64% | 2723 fps | 95.5% |
| IMR 4198 | <<locked>> | 80% | 46,021 psi | 74% | 2769 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 38,014 psi | 61% | 2743 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 80% | 38,624 psi | 62% | 2697 fps | 97% |
| Lovex D073.5 | <<locked>> | 80% | 43,337 psi | 70% | 2792 fps | 98.9% |
| Lovex D073.6 | <<locked>> | 80% | 34,969 psi | 56% | 2657 fps | 97.7% |
| Lovex S060 | <<locked>> | 80% | 37,768 psi | 61% | 2631 fps | 95.4% |
| Lovex S062 | <<locked>> | 80% | 32,576 psi | 53% | 2566 fps | 95.1% |
| Norma 200 | <<locked>> | 80% | 51,155 psi | 83% | 2867 fps | 100% |
| Norma 201 | <<locked>> | 80% | 36,027 psi | 58% | 2635 fps | 96.3% |
| Norma 202 | <<locked>> | 80% | 36,129 psi | 58% | 2661 fps | 98.6% |
| Norma 203B | <<locked>> | 84% | 36,477 psi | 59% | 2697 fps | 95% |
| Ramshot Big Game | <<locked>> | 86% | 38,667 psi | 62% | 2762 fps | 95.4% |
| Ramshot TAC | <<locked>> | 86% | 47,137 psi | 76% | 2861 fps | 95.1% |
| Ramshot Wild Boar | <<locked>> | 80% | 37,826 psi | 61% | 2710 fps | 95.3% |
| Ramshot X-Terminator | <<locked>> | 80% | 41,974 psi | 68% | 2743 fps | 96.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,788 psi | 42% | 1673 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 43,613 psi | 70% | 2799 fps | 99.2% |
| ReloadSwiss RS 52 | 31.2 gr | 86% | 41,162 psi | 66% | 2867 fps | 95.8% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 32,068 psi | 52% | 2657 fps | 95.8% |
| Rottweil R 901 | <<locked>> | 80% | 39,668 psi | 64% | 2700 fps | 99% |
| Rottweil R 902 | <<locked>> | 80% | 34,258 psi | 55% | 2585 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 88% | 36,114 psi | 58% | 2690 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 34,969 psi | 56% | 2657 fps | 97.7% |
| Shooters World Precision | <<locked>> | 80% | 32,576 psi | 53% | 2566 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 46,209 psi | 75% | 2812 fps | 98.4% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 52,591 psi | 85% | 2598 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 48,878 psi | 79% | 2907 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 37,855 psi | 61% | 2753 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 46,050 psi | 74% | 2818 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 86% | 45,165 psi | 73% | 2831 fps | 95.3% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 37,855 psi | 61% | 2700 fps | 95.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 37,782 psi | 61% | 2615 fps | 98.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 30,908 psi | 50% | 2470 fps | 98.1% |
| Somchem S321 | <<locked>> | 80% | 41,597 psi | 67% | 2782 fps | 98.1% |
| Somchem S335 | <<locked>> | 80% | 37,173 psi | 60% | 2618 fps | 99.3% |
| Somchem S341 | <<locked>> | 82% | 38,740 psi | 62% | 2710 fps | 95.5% |
| Somchem S355 | <<locked>> | 86% | 35,085 psi | 57% | 2651 fps | 95% |
| Somchem S365 | <<locked>> | 94% | 32,474 psi | 52% | 2667 fps | 95.2% |
| Vihtavuori N130 | <<locked>> | 80% | 42,873 psi | 69% | 2707 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 37,826 psi | 61% | 2621 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 32,996 psi | 53% | 2589 fps | 99.7% |
| Vihtavuori N140 | <<locked>> | 80% | 33,968 psi | 55% | 2585 fps | 98.4% |
| Vihtavuori N150 | <<locked>> | 84% | 31,140 psi | 50% | 2530 fps | 95.2% |
| Vihtavuori N160 | <<locked>> | 98% | 43,700 psi | 70% | 2851 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 38,479 psi | 62% | 2690 fps | 97.1% |
| Vihtavuori N540 | <<locked>> | 80% | 32,605 psi | 53% | 2569 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 36,753 psi | 59% | 2664 fps | 95.3% |
| Winchester 748 | <<locked>> | 80% | 37,608 psi | 61% | 2736 fps | 97.7% |
| Winchester StaBALL Match | <<locked>> | 82% | 36,840 psi | 59% | 2697 fps | 95.8% |
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 85 powders for 6 mm GT loaded with the .243 | 88gr | Warner Tool Co. Flat Line. ReloadSwiss RS 60 delivers the highest muzzle velocity at 3,153 fps; across all powders the maximum-charge window runs from 1,831 fps to 3,153 fps. Alliant Reloder-17 gives the best case fill at 100 %, and 85 of the 85 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (427 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 88.0 gr projectile in 0.243" calls for a 1:7.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-17, Hodgdon Hybrid 100V, Hodgdon TrailBoss 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, Hodgdon CFE223, ReloadSwiss RS 52 rank at the top here: for 6 mm GT with the .243 | 88gr | Warner Tool Co. Flat Line 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.