Load Specifications
Load data in caliber 6 mm GT with .243 | 70gr | Sierra Tipped VarmintKing bullet and 84 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 1200-R, Winchester 748 and IMR 3031.
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 1680 | <<locked>> | 82% | 55,492 psi | 90% | 3215 fps | 100% |
| Accurate 2015 | <<locked>> | 94% | 55,056 psi | 89% | 3287 fps | 100% |
| Accurate 2200 | <<locked>> | 86% | 55,956 psi | 90% | 3379 fps | 96.6% |
| Accurate 2230 | <<locked>> | 84% | 53,301 psi | 86% | 3323 fps | 96.4% |
| Accurate 2460 | <<locked>> | 90% | 53,882 psi | 87% | 3301 fps | 99.6% |
| Accurate 2495ᴾ | <<locked>> | 100% | 54,708 psi | 88% | 3333 fps | 100% |
| Accurate 2520 | <<locked>> | 94% | 55,027 psi | 89% | 3356 fps | 99.6% |
| Accurate 4064ᴾ | <<locked>> | 100% | 50,647 psi | 82% | 3304 fps | 99.7% |
| Accurate LT-30 | <<locked>> | 86% | 53,142 psi | 86% | 3192 fps | 100% |
| Accurate LT-32 | <<locked>> | 86% | 53,519 psi | 86% | 3209 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 96% | 54,447 psi | 88% | 3353 fps | 97.3% |
| ADI AR 2207 | <<locked>> | 84% | 53,867 psi | 87% | 3235 fps | 100% |
| ADI AR 2208ᴾ | <<locked>> | 100% | 52,112 psi | 84% | 3278 fps | 96% |
| ADI AR 2219 | <<locked>> | 86% | 52,576 psi | 85% | 3310 fps | 99.9% |
| ADI Benchmark 8208 | <<locked>> | 94% | 53,737 psi | 87% | 3310 fps | 98.3% |
| Alliant AR-Comp | <<locked>> | 96% | 55,724 psi | 90% | 3373 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 90% | 54,534 psi | 88% | 3428 fps | 97.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 98% | 54,230 psi | 87% | 3445 fps | 96% |
| Alliant Reloder- TS 15.5ᴾ | <<locked>> | 100% | 50,183 psi | 81% | 3291 fps | 97.4% |
| Alliant Reloder-10x | <<locked>> | 90% | 54,926 psi | 89% | 3307 fps | 100% |
| Alliant Reloder-15ᴾ | <<locked>> | 100% | 54,737 psi | 88% | 3376 fps | 96.8% |
| Alliant Reloder-7 | <<locked>> | 84% | 55,056 psi | 89% | 3248 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 88% | 55,550 psi | 90% | 3228 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 96% | 54,302 psi | 88% | 3353 fps | 96% |
| Bofors RP3ᴾ | <<locked>> | 100% | 50,169 psi | 81% | 3301 fps | 97.5% |
| Hodgdon Benchmark | <<locked>> | 92% | 53,345 psi | 86% | 3258 fps | 98.7% |
| Hodgdon BL-C2 | <<locked>> | 96% | 56,028 psi | 90% | 3399 fps | 99.1% |
| Hodgdon CFE223 | <<locked>> | 92% | 54,157 psi | 87% | 3435 fps | 96.7% |
| Hodgdon H322 | <<locked>> | 90% | 54,505 psi | 88% | 3340 fps | 100% |
| Hodgdon H335 | <<locked>> | 90% | 55,840 psi | 90% | 3363 fps | 99.8% |
| Hodgdon H4198 | <<locked>> | 84% | 54,607 psi | 88% | 3245 fps | 99.9% |
| Hodgdon H4895 | <<locked>> | 96% | 54,824 psi | 88% | 3369 fps | 97.9% |
| Hodgdon LEVERevolution | <<locked>> | 98% | 52,823 psi | 85% | 3383 fps | 98% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,446 psi | 54% | 2054 fps | 100% |
| Hodgdon VARGET | <<locked>> | 96% | 52,736 psi | 85% | 3307 fps | 97.4% |
| IMR 3031 | <<locked>> | 96% | 53,040 psi | 86% | 3376 fps | 100% |
| IMR 4064ᴾ | <<locked>> | 100% | 54,839 psi | 88% | 3323 fps | 96.8% |
| IMR 4198 | <<locked>> | 90% | 55,854 psi | 90% | 3278 fps | 100% |
| IMR 4895ᴾ | <<locked>> | 100% | 55,999 psi | 90% | 3415 fps | 97.7% |
| IMR 8208 XBR | <<locked>> | 94% | 53,737 psi | 87% | 3310 fps | 98.3% |
| Lovex D073.4 | <<locked>> | 84% | 53,722 psi | 87% | 3310 fps | 99.3% |
| Lovex D073.5 | <<locked>> | 90% | 54,143 psi | 87% | 3304 fps | 99% |
| Lovex D073.6 | <<locked>> | 96% | 52,446 psi | 85% | 3323 fps | 99.3% |
| Lovex S060 | <<locked>> | 96% | 55,187 psi | 89% | 3281 fps | 97.4% |
| Lovex S062ᴾ | <<locked>> | 100% | 53,476 psi | 86% | 3317 fps | 98.3% |
| Norma 200 | <<locked>> | 86% | 54,984 psi | 89% | 3281 fps | 100% |
| Norma 201 | <<locked>> | 96% | 52,997 psi | 85% | 3297 fps | 98.2% |
| Norma 202 | <<locked>> | 96% | 53,156 psi | 86% | 3317 fps | 99.7% |
| Norma 203Bᴾ | <<locked>> | 100% | 53,722 psi | 87% | 3363 fps | 97.2% |
| Ramshot Big Gameᴾ | <<locked>> | 100% | 54,940 psi | 89% | 3389 fps | 97.2% |
| Ramshot Wild Boar | <<locked>> | 94% | 53,461 psi | 86% | 3337 fps | 97% |
| Ramshot X-Terminator | <<locked>> | 92% | 55,956 psi | 90% | 3317 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,779 psi | 54% | 2106 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 90% | 53,853 psi | 87% | 3314 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 98% | 54,418 psi | 88% | 3448 fps | 96.7% |
| ReloadSwiss RS 60ᴾ | <<locked>> | 100% | 48,254 psi | 78% | 3346 fps | 98.6% |
| Rottweil R 901 | <<locked>> | 94% | 53,998 psi | 87% | 3304 fps | 99.6% |
| Rottweil R 902 | <<locked>> | 98% | 53,156 psi | 86% | 3287 fps | 98.2% |
| Rottweil R 903ᴾ | <<locked>> | 100% | 46,485 psi | 75% | 3219 fps | 96.3% |
| Shooters World AR Plus | <<locked>> | 84% | 53,722 psi | 87% | 3310 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 96% | 52,446 psi | 85% | 3323 fps | 99.3% |
| Shooters World Precisionᴾ | <<locked>> | 100% | 53,476 psi | 86% | 3317 fps | 98.3% |
| Shooters World Tactical Rifle | <<locked>> | 88% | 54,157 psi | 87% | 3271 fps | 98% |
| SNPE Vectan BA6 1/2 | <<locked>> | 84% | 53,693 psi | 87% | 2953 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 86% | 52,939 psi | 85% | 3310 fps | 99.6% |
| SNPE Vectan SP 11ᴾ | <<locked>> | 100% | 49,371 psi | 80% | 3297 fps | 96% |
| SNPE Vectan SP 3 | <<locked>> | 90% | 56,043 psi | 90% | 3327 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 96% | 52,605 psi | 85% | 3307 fps | 96.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 96% | 55,564 psi | 90% | 3258 fps | 99.8% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 51,343 psi | 83% | 3189 fps | 99.9% |
| Somchem S321 | <<locked>> | 92% | 55,477 psi | 89% | 3360 fps | 98.8% |
| Somchem S335 | <<locked>> | 96% | 54,418 psi | 88% | 3258 fps | 100% |
| Somchem S341 | <<locked>> | 96% | 55,695 psi | 90% | 3340 fps | 97.3% |
| Somchem S355ᴾ | <<locked>> | 100% | 47,732 psi | 77% | 3228 fps | 96.4% |
| Vihtavuori N120 | <<locked>> | 84% | 53,795 psi | 87% | 3176 fps | 100% |
| Vihtavuori N130 | <<locked>> | 92% | 55,332 psi | 89% | 3245 fps | 100% |
| Vihtavuori N133 | <<locked>> | 96% | 55,071 psi | 89% | 3255 fps | 100% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 54,636 psi | 88% | 3327 fps | 100% |
| Vihtavuori N140 | <<locked>> | 98% | 53,548 psi | 86% | 3287 fps | 99.8% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 45,992 psi | 74% | 3159 fps | 97.4% |
| Vihtavuori N530 | <<locked>> | 94% | 54,534 psi | 88% | 3314 fps | 98.4% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 55,738 psi | 90% | 3340 fps | 99.8% |
| Winchester 748 | <<locked>> | 94% | 52,750 psi | 85% | 3353 fps | 98.9% |
| Winchester StaBALL Match | <<locked>> | 98% | 55,970 psi | 90% | 3383 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 1680 | <<locked>> | 80% | 51,822 psi | 84% | 3156 fps | 100% |
| Accurate 2015 | <<locked>> | 80% | 35,273 psi | 57% | 2897 fps | 98.7% |
| Accurate 2200 | <<locked>> | 84% | 52,576 psi | 85% | 3317 fps | 95.8% |
| Accurate 2230 | <<locked>> | 82% | 49,574 psi | 80% | 3255 fps | 95.6% |
| Accurate 2460 | <<locked>> | 80% | 38,261 psi | 62% | 2986 fps | 97% |
| Accurate 2495 | <<locked>> | 80% | 27,934 psi | 45% | 2749 fps | 96.8% |
| Accurate 2520 | <<locked>> | 82% | 36,027 psi | 58% | 2972 fps | 95.9% |
| Accurate 4064 | <<locked>> | 86% | 32,024 psi | 52% | 2884 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 43,918 psi | 71% | 3022 fps | 99.3% |
| Accurate LT-32 | <<locked>> | 80% | 44,280 psi | 71% | 3031 fps | 98% |
| ADI AR 2206H | <<locked>> | 90% | 44,686 psi | 72% | 3159 fps | 95% |
| ADI AR 2207 | <<locked>> | 80% | 47,558 psi | 77% | 3130 fps | 100% |
| ADI AR 2208 | <<locked>> | 98% | 48,631 psi | 78% | 3212 fps | 95.1% |
| ADI AR 2219 | <<locked>> | 80% | 42,728 psi | 69% | 3120 fps | 99% |
| ADI Benchmark 8208 | <<locked>> | 86% | 41,568 psi | 67% | 3064 fps | 95.5% |
| Alliant AR-Comp | <<locked>> | 80% | 32,314 psi | 52% | 2917 fps | 99.8% |
| Alliant Power Pro 1200-R | 31.2 gr | 84% | 44,744 psi | 72% | 3232 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 96% | 50,589 psi | 82% | 3369 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 94% | 41,292 psi | 67% | 3107 fps | 95.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 40,248 psi | 65% | 3035 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 96% | 48,414 psi | 78% | 3258 fps | 95.4% |
| Alliant Reloder-7 | <<locked>> | 80% | 48,399 psi | 78% | 3136 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 42,830 psi | 69% | 3005 fps | 99.4% |
| Baschieri & Pellagri 107 | <<locked>> | 94% | 50,734 psi | 82% | 3287 fps | 95.2% |
| Bofors RP3 | <<locked>> | 94% | 41,002 psi | 66% | 3114 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 82% | 39,102 psi | 63% | 2963 fps | 95.5% |
| Hodgdon BL-C2 | <<locked>> | 86% | 39,392 psi | 64% | 3071 fps | 95.7% |
| Hodgdon CFE223 | <<locked>> | 90% | 50,111 psi | 81% | 3353 fps | 95.7% |
| Hodgdon H322 | <<locked>> | 80% | 39,030 psi | 63% | 3038 fps | 98.3% |
| Hodgdon H335 | <<locked>> | 80% | 39,450 psi | 64% | 3045 fps | 97.6% |
| Hodgdon H4198 | <<locked>> | 80% | 48,341 psi | 78% | 3133 fps | 99.5% |
| Hodgdon H4895 | <<locked>> | 88% | 42,337 psi | 68% | 3117 fps | 95% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 43,366 psi | 70% | 3189 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,729 psi | 40% | 1841 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 43,627 psi | 70% | 3127 fps | 95.2% |
| IMR 3031 | 28.7 gr | 80% | 30,980 psi | 50% | 2884 fps | 96.8% |
| IMR 4064 | <<locked>> | 96% | 48,095 psi | 78% | 3196 fps | 95.3% |
| IMR 4198 | <<locked>> | 80% | 41,191 psi | 66% | 3015 fps | 100% |
| IMR 4895 | <<locked>> | 94% | 46,209 psi | 75% | 3232 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 86% | 41,568 psi | 67% | 3064 fps | 95.5% |
| Lovex D073.4 | <<locked>> | 80% | 46,514 psi | 75% | 3179 fps | 98.3% |
| Lovex D073.5 | <<locked>> | 80% | 38,116 psi | 61% | 2982 fps | 95.6% |
| Lovex D073.6 | <<locked>> | 84% | 34,838 psi | 56% | 2949 fps | 95.4% |
| Lovex S060 | <<locked>> | 90% | 45,861 psi | 74% | 3107 fps | 95.3% |
| Lovex S062 | <<locked>> | 92% | 41,539 psi | 67% | 3077 fps | 95.7% |
| Norma 200 | <<locked>> | 80% | 45,788 psi | 74% | 3123 fps | 100% |
| Norma 201 | <<locked>> | 88% | 41,191 psi | 66% | 3058 fps | 95.6% |
| Norma 202 | <<locked>> | 82% | 33,881 psi | 55% | 2900 fps | 95.9% |
| Norma 203B | <<locked>> | 96% | 47,572 psi | 77% | 3245 fps | 95.8% |
| Ramshot Big Game | <<locked>> | 96% | 47,863 psi | 77% | 3255 fps | 95.5% |
| Ramshot Wild Boar | <<locked>> | 90% | 46,586 psi | 75% | 3202 fps | 95.4% |
| Ramshot X-Terminator | <<locked>> | 86% | 45,861 psi | 74% | 3123 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,801 psi | 40% | 1883 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 38,711 psi | 62% | 3002 fps | 96.3% |
| ReloadSwiss RS 52 | <<locked>> | 94% | 47,500 psi | 77% | 3314 fps | 95% |
| ReloadSwiss RS 60 | <<locked>> | 94% | 39,276 psi | 63% | 3127 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 80% | 35,215 psi | 57% | 2897 fps | 96% |
| Rottweil R 902 | <<locked>> | 90% | 41,321 psi | 67% | 3048 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 98% | 43,569 psi | 70% | 3156 fps | 95.5% |
| Shooters World AR Plus | <<locked>> | 80% | 46,514 psi | 75% | 3179 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 84% | 34,838 psi | 56% | 2949 fps | 95.4% |
| Shooters World Precision | <<locked>> | 92% | 41,539 psi | 67% | 3077 fps | 95.7% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 41,249 psi | 67% | 3015 fps | 95% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 48,385 psi | 78% | 2877 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 43,062 psi | 69% | 3120 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 98% | 46,108 psi | 74% | 3228 fps | 95.1% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 40,886 psi | 66% | 3048 fps | 99.2% |
| SNPE Vectan SP 9 | <<locked>> | 92% | 46,369 psi | 75% | 3189 fps | 95.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 33,707 psi | 54% | 2808 fps | 95.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 29,080 psi | 47% | 2697 fps | 95.1% |
| Somchem S321 | <<locked>> | 82% | 39,363 psi | 63% | 3035 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 33,214 psi | 54% | 2812 fps | 96.6% |
| Somchem S341 | <<locked>> | 92% | 48,457 psi | 78% | 3209 fps | 95.8% |
| Somchem S355 | <<locked>> | 98% | 44,860 psi | 72% | 3173 fps | 95.7% |
| Vihtavuori N120 | <<locked>> | 80% | 47,558 psi | 77% | 3077 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 38,319 psi | 62% | 2933 fps | 99.7% |
| Vihtavuori N133 | <<locked>> | 80% | 33,547 psi | 54% | 2825 fps | 98.3% |
| Vihtavuori N135 | <<locked>> | 80% | 28,572 psi | 46% | 2766 fps | 96.9% |
| Vihtavuori N140 | <<locked>> | 82% | 31,836 psi | 51% | 2822 fps | 95.5% |
| Vihtavuori N150 | <<locked>> | 94% | 37,710 psi | 61% | 2979 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 86% | 41,771 psi | 67% | 3064 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 84% | 32,909 psi | 53% | 2861 fps | 95.3% |
| Winchester 748 | 32.7 gr | 84% | 37,753 psi | 61% | 3035 fps | 95.4% |
| Winchester StaBALL Match | <<locked>> | 90% | 42,293 psi | 68% | 3120 fps | 95% |
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 84 powders for 6 mm GT loaded with the .243 | 70gr | Sierra Tipped VarmintKing. ReloadSwiss RS 52 delivers the highest muzzle velocity at 3,448 fps; across all powders the maximum-charge window runs from 2,054 fps to 3,448 fps. Accurate 2495 gives the best case fill at 100 %, and 84 of the 84 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 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, 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. Alliant Power Pro 1200-R, Winchester 748, IMR 3031 rank at the top here: for 6 mm GT with the .243 | 70gr | Sierra Tipped VarmintKing 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.