Load Specifications
Load data in caliber 6 mm GT with .243 | 70gr | Speer TNT bullet and 84 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 52, Hodgdon CFE223 and Alliant Power Pro 1200-R.
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>> | 92% | 53,998 psi | 87% | 3281 fps | 100% |
| Accurate 2200 | <<locked>> | 84% | 54,360 psi | 88% | 3369 fps | 96.6% |
| Accurate 2230 | <<locked>> | 84% | 55,448 psi | 89% | 3379 fps | 97.2% |
| Accurate 2460 | <<locked>> | 88% | 52,721 psi | 85% | 3291 fps | 99.6% |
| Accurate 2495 | <<locked>> | 98% | 53,896 psi | 87% | 3330 fps | 100% |
| Accurate 2520 | <<locked>> | 92% | 54,114 psi | 87% | 3356 fps | 99.6% |
| Accurate 4064ᴾ | <<locked>> | 100% | 53,664 psi | 87% | 3363 fps | 99.9% |
| Accurate LT-30 | <<locked>> | 86% | 54,766 psi | 88% | 3235 fps | 100% |
| Accurate LT-32 | <<locked>> | 86% | 55,158 psi | 89% | 3255 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 94% | 53,113 psi | 86% | 3346 fps | 97.3% |
| ADI AR 2207 | <<locked>> | 84% | 55,579 psi | 90% | 3271 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 54,143 psi | 87% | 3333 fps | 96.8% |
| ADI AR 2219 | <<locked>> | 86% | 54,766 psi | 88% | 3360 fps | 100% |
| ADI Benchmark 8208 | <<locked>> | 94% | 56,014 psi | 90% | 3366 fps | 98.8% |
| Alliant AR-Comp | <<locked>> | 94% | 54,607 psi | 88% | 3366 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 88% | 53,563 psi | 86% | 3425 fps | 98% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 52,808 psi | 85% | 3438 fps | 96.1% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 52,823 psi | 85% | 3353 fps | 98.1% |
| Alliant Reloder-10x | <<locked>> | 88% | 54,085 psi | 87% | 3307 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 98% | 53,664 psi | 87% | 3373 fps | 96.9% |
| Alliant Reloder-17ᴾ | <<locked>> | 100% | 47,036 psi | 76% | 3317 fps | 96.3% |
| Alliant Reloder-7 | <<locked>> | 82% | 53,388 psi | 86% | 3235 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 53,708 psi | 87% | 3215 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 53,026 psi | 86% | 3346 fps | 96.1% |
| Bofors RP3ᴾ | <<locked>> | 100% | 52,866 psi | 85% | 3363 fps | 98.2% |
| Hodgdon Benchmark | <<locked>> | 92% | 55,172 psi | 89% | 3304 fps | 99.1% |
| Hodgdon BL-C2 | <<locked>> | 94% | 54,853 psi | 88% | 3392 fps | 99.1% |
| Hodgdon CFE223 | <<locked>> | 90% | 52,707 psi | 85% | 3422 fps | 96.7% |
| Hodgdon H322 | <<locked>> | 88% | 52,953 psi | 85% | 3330 fps | 100% |
| Hodgdon H335 | <<locked>> | 88% | 54,491 psi | 88% | 3353 fps | 99.8% |
| Hodgdon H4198 | <<locked>> | 82% | 53,243 psi | 86% | 3235 fps | 99.9% |
| Hodgdon H4895 | <<locked>> | 94% | 53,476 psi | 86% | 3360 fps | 97.9% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 55,317 psi | 89% | 3442 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,707 psi | 54% | 2077 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 54,998 psi | 89% | 3363 fps | 98.1% |
| IMR 3031 | <<locked>> | 96% | 55,332 psi | 89% | 3422 fps | 100% |
| IMR 4064 | <<locked>> | 98% | 53,330 psi | 86% | 3310 fps | 96.8% |
| IMR 4198 | <<locked>> | 88% | 54,563 psi | 88% | 3271 fps | 100% |
| IMR 4895 | <<locked>> | 98% | 54,969 psi | 89% | 3415 fps | 97.8% |
| IMR 8208 XBR | <<locked>> | 94% | 56,014 psi | 90% | 3366 fps | 98.8% |
| Lovex D073.4 | <<locked>> | 82% | 52,199 psi | 84% | 3301 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 88% | 52,823 psi | 85% | 3297 fps | 99% |
| Lovex D073.6 | <<locked>> | 96% | 55,303 psi | 89% | 3386 fps | 99.7% |
| Lovex S060 | <<locked>> | 94% | 53,751 psi | 87% | 3278 fps | 97.4% |
| Lovex S062 | <<locked>> | 98% | 52,547 psi | 85% | 3314 fps | 98.4% |
| Norma 200 | <<locked>> | 84% | 53,751 psi | 87% | 3274 fps | 100% |
| Norma 201 | <<locked>> | 96% | 55,303 psi | 89% | 3353 fps | 98.8% |
| Norma 202 | <<locked>> | 96% | 55,579 psi | 90% | 3369 fps | 99.9% |
| Norma 203B | <<locked>> | 98% | 52,721 psi | 85% | 3360 fps | 97.3% |
| Ramshot Big Game | <<locked>> | 98% | 53,548 psi | 86% | 3383 fps | 97.2% |
| Ramshot Wild Boar | <<locked>> | 94% | 55,927 psi | 90% | 3392 fps | 97.8% |
| Ramshot X-Terminator | <<locked>> | 90% | 54,404 psi | 88% | 3307 fps | 97.4% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 34,040 psi | 55% | 2129 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 90% | 55,825 psi | 90% | 3363 fps | 99.6% |
| ReloadSwiss RS 52 | <<locked>> | 96% | 53,359 psi | 86% | 3442 fps | 96.8% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 50,299 psi | 81% | 3409 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 92% | 52,591 psi | 85% | 3291 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 98% | 55,506 psi | 90% | 3343 fps | 98.8% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 49,124 psi | 79% | 3284 fps | 97.3% |
| Shooters World AR Plus | <<locked>> | 82% | 52,199 psi | 84% | 3301 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 96% | 55,303 psi | 89% | 3386 fps | 99.7% |
| Shooters World Precision | <<locked>> | 98% | 52,547 psi | 85% | 3314 fps | 98.4% |
| Shooters World Tactical Rifle | <<locked>> | 86% | 52,750 psi | 85% | 3261 fps | 98% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 55,085 psi | 89% | 2986 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 55,332 psi | 89% | 3366 fps | 99.9% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 51,605 psi | 83% | 3356 fps | 96.9% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 54,650 psi | 88% | 3320 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 55,158 psi | 89% | 3369 fps | 97.7% |
| SNPE Vectan Tubal 3000 | <<locked>> | 94% | 54,230 psi | 87% | 3255 fps | 99.8% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 53,519 psi | 86% | 3241 fps | 100% |
| Somchem S321 | <<locked>> | 90% | 53,969 psi | 87% | 3346 fps | 98.8% |
| Somchem S335 | <<locked>> | 94% | 53,127 psi | 86% | 3248 fps | 100% |
| Somchem S341 | <<locked>> | 94% | 54,389 psi | 88% | 3333 fps | 97.4% |
| Somchem S355ᴾ | <<locked>> | 100% | 50,285 psi | 81% | 3294 fps | 97.3% |
| Vihtavuori N120 | <<locked>> | 84% | 55,463 psi | 89% | 3212 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 54,244 psi | 87% | 3241 fps | 100% |
| Vihtavuori N133 | <<locked>> | 94% | 53,824 psi | 87% | 3248 fps | 100% |
| Vihtavuori N135 | <<locked>> | 98% | 53,882 psi | 87% | 3327 fps | 100% |
| Vihtavuori N140 | <<locked>> | 98% | 55,854 psi | 90% | 3337 fps | 100% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 48,515 psi | 78% | 3219 fps | 98.2% |
| Vihtavuori N530 | <<locked>> | 92% | 53,142 psi | 86% | 3304 fps | 98.4% |
| Vihtavuori N540 | <<locked>> | 98% | 54,534 psi | 88% | 3333 fps | 99.8% |
| Winchester 748 | <<locked>> | 94% | 55,535 psi | 90% | 3415 fps | 99.4% |
| Winchester StaBALL Match | <<locked>> | 96% | 54,708 psi | 88% | 3376 fps | 98.1% |
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% | 36,695 psi | 59% | 2943 fps | 99.2% |
| Accurate 2200 | <<locked>> | 80% | 47,834 psi | 77% | 3238 fps | 95% |
| Accurate 2230 | <<locked>> | 80% | 47,834 psi | 77% | 3232 fps | 95.5% |
| Accurate 2460 | <<locked>> | 80% | 39,813 psi | 64% | 3035 fps | 97.7% |
| Accurate 2495 | <<locked>> | 80% | 29,283 psi | 47% | 2799 fps | 97.6% |
| Accurate 2520 | <<locked>> | 80% | 35,360 psi | 57% | 2963 fps | 95.9% |
| Accurate 4064 | <<locked>> | 82% | 29,747 psi | 48% | 2825 fps | 95% |
| Accurate LT-30 | <<locked>> | 80% | 45,643 psi | 74% | 3071 fps | 99.6% |
| Accurate LT-32 | <<locked>> | 80% | 45,992 psi | 74% | 3084 fps | 98.6% |
| ADI AR 2206H | <<locked>> | 88% | 43,947 psi | 71% | 3156 fps | 95.1% |
| ADI AR 2207 | <<locked>> | 80% | 49,298 psi | 80% | 3173 fps | 100% |
| ADI AR 2208 | <<locked>> | 96% | 47,848 psi | 77% | 3212 fps | 95.3% |
| ADI AR 2219 | <<locked>> | 80% | 44,527 psi | 72% | 3169 fps | 99.4% |
| ADI Benchmark 8208 | <<locked>> | 84% | 40,611 psi | 66% | 3058 fps | 95.6% |
| Alliant AR-Comp | <<locked>> | 80% | 34,055 psi | 55% | 2972 fps | 100% |
| Alliant Power Pro 1200-R | 31.7 gr | 82% | 43,874 psi | 71% | 3225 fps | 95.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 94% | 49,385 psi | 80% | 3366 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 92% | 40,582 psi | 65% | 3104 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 41,814 psi | 67% | 3077 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 94% | 47,326 psi | 76% | 3248 fps | 95.4% |
| Alliant Reloder-17 | <<locked>> | 98% | 43,976 psi | 71% | 3245 fps | 95.3% |
| Alliant Reloder-7 | <<locked>> | 80% | 50,357 psi | 81% | 3182 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 44,164 psi | 71% | 3045 fps | 99.6% |
| Baschieri & Pellagri 107 | <<locked>> | 92% | 49,269 psi | 79% | 3278 fps | 95.2% |
| Bofors RP3 | <<locked>> | 92% | 40,234 psi | 65% | 3104 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 38,029 psi | 61% | 2949 fps | 95.4% |
| Hodgdon BL-C2 | <<locked>> | 84% | 38,798 psi | 63% | 3068 fps | 95.8% |
| Hodgdon CFE223 | 37 gr | 88% | 48,892 psi | 79% | 3346 fps | 95.8% |
| Hodgdon H322 | <<locked>> | 80% | 40,770 psi | 66% | 3091 fps | 98.9% |
| Hodgdon H335 | <<locked>> | 80% | 41,350 psi | 67% | 3097 fps | 98.2% |
| Hodgdon H4198 | <<locked>> | 80% | 50,212 psi | 81% | 3182 fps | 99.8% |
| Hodgdon H4895 | <<locked>> | 86% | 41,365 psi | 67% | 3110 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 90% | 42,351 psi | 68% | 3179 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,932 psi | 40% | 1860 fps | 100% |
| Hodgdon VARGET | <<locked>> | 88% | 42,801 psi | 69% | 3120 fps | 95.3% |
| IMR 3031 | <<locked>> | 80% | 32,605 psi | 53% | 2943 fps | 97.6% |
| IMR 4064 | <<locked>> | 94% | 47,021 psi | 76% | 3192 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 42,830 psi | 69% | 3064 fps | 100% |
| IMR 4895 | <<locked>> | 92% | 45,295 psi | 73% | 3225 fps | 95.6% |
| IMR 8208 XBR | <<locked>> | 84% | 40,611 psi | 66% | 3058 fps | 95.6% |
| Lovex D073.4 | <<locked>> | 80% | 48,704 psi | 79% | 3235 fps | 98.8% |
| Lovex D073.5 | <<locked>> | 80% | 39,653 psi | 64% | 3031 fps | 96.4% |
| Lovex D073.6 | <<locked>> | 82% | 33,939 psi | 55% | 2936 fps | 95.3% |
| Lovex S060 | <<locked>> | 88% | 45,020 psi | 73% | 3104 fps | 95.4% |
| Lovex S062 | <<locked>> | 88% | 38,551 psi | 62% | 3022 fps | 95.1% |
| Norma 200 | <<locked>> | 80% | 47,398 psi | 76% | 3166 fps | 100% |
| Norma 201 | <<locked>> | 86% | 40,263 psi | 65% | 3048 fps | 95.6% |
| Norma 202 | <<locked>> | 80% | 33,069 psi | 53% | 2887 fps | 95.8% |
| Norma 203B | <<locked>> | 92% | 43,453 psi | 70% | 3173 fps | 95% |
| Ramshot Big Game | <<locked>> | 94% | 46,847 psi | 76% | 3251 fps | 95.6% |
| Ramshot Wild Boar | <<locked>> | 88% | 45,556 psi | 73% | 3196 fps | 95.5% |
| Ramshot X-Terminator | <<locked>> | 84% | 44,527 psi | 72% | 3114 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 25,019 psi | 40% | 1903 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 40,292 psi | 65% | 3054 fps | 97% |
| ReloadSwiss RS 52 | 36.7 gr | 92% | 46,427 psi | 75% | 3304 fps | 95% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 38,609 psi | 62% | 3130 fps | 96.1% |
| Rottweil R 901 | <<locked>> | 80% | 36,564 psi | 59% | 2946 fps | 96.7% |
| Rottweil R 902 | <<locked>> | 88% | 40,712 psi | 66% | 3048 fps | 95.7% |
| Rottweil R 903 | <<locked>> | 96% | 43,047 psi | 69% | 3159 fps | 95.7% |
| Shooters World AR Plus | <<locked>> | 80% | 48,704 psi | 79% | 3235 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 82% | 33,939 psi | 55% | 2936 fps | 95.3% |
| Shooters World Precision | <<locked>> | 88% | 38,551 psi | 62% | 3022 fps | 95.1% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 42,699 psi | 69% | 3064 fps | 95.8% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 49,835 psi | 80% | 2910 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 45,063 psi | 73% | 3173 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 45,165 psi | 73% | 3225 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 42,453 psi | 68% | 3094 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 45,324 psi | 73% | 3179 fps | 95.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 34,954 psi | 56% | 2854 fps | 96.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 28,398 psi | 46% | 2684 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 38,116 psi | 61% | 3015 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 34,403 psi | 55% | 2858 fps | 97.2% |
| Somchem S341 | <<locked>> | 88% | 44,121 psi | 71% | 3136 fps | 95% |
| Somchem S355 | <<locked>> | 96% | 44,266 psi | 71% | 3173 fps | 95.8% |
| Vihtavuori N120 | <<locked>> | 80% | 49,269 psi | 79% | 3117 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 39,755 psi | 64% | 2976 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 80% | 34,882 psi | 56% | 2871 fps | 98.8% |
| Vihtavuori N135 | <<locked>> | 80% | 29,907 psi | 48% | 2815 fps | 97.7% |
| Vihtavuori N140 | <<locked>> | 80% | 31,314 psi | 51% | 2818 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 92% | 37,057 psi | 60% | 2976 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 84% | 40,741 psi | 66% | 3054 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 82% | 32,227 psi | 52% | 2851 fps | 95.3% |
| Winchester 748 | <<locked>> | 82% | 36,593 psi | 59% | 3018 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 88% | 41,408 psi | 67% | 3114 fps | 95.1% |
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 | 70gr | Speer TNT. Hodgdon LEVERevolution delivers the highest muzzle velocity at 3,442 fps; across all powders the maximum-charge window runs from 2,077 fps to 3,442 fps. Accurate 4064 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 54–90 %, leaving at least 10 % headroom. The 70.0 gr projectile in 0.243" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 4064, Accurate 4350, ADI AR 2208 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 52, Hodgdon CFE223, Alliant Power Pro 1200-R rank at the top here: for 6 mm GT with the .243 | 70gr | Speer TNT they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate 4350, Alliant Reloder-16, Hodgdon Hybrid 100V burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.