Load Specifications
Load data in caliber 6 mm GT with .243 | 60gr | Berger M bullet and 60 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Winchester 748, Hodgdon H322 and Hodgdon BL-C2.
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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Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 84% | 54,520 psi | 88% | 3419 fps | 100% |
| Accurate 2015 | <<locked>> | 98% | 55,941 psi | 90% | 3524 fps | 100% |
| Accurate 2460 | <<locked>> | 94% | 55,376 psi | 89% | 3537 fps | 99% |
| Accurate 2495ᴾ | <<locked>> | 100% | 48,225 psi | 78% | 3445 fps | 99.8% |
| Accurate 2520 | <<locked>> | 96% | 52,257 psi | 84% | 3520 fps | 98.3% |
| Accurate 4064ᴾ | <<locked>> | 100% | 44,657 psi | 72% | 3396 fps | 97.9% |
| Accurate LT-30 | <<locked>> | 90% | 54,969 psi | 89% | 3438 fps | 99.6% |
| Accurate LT-32 | <<locked>> | 90% | 55,434 psi | 89% | 3451 fps | 98.6% |
| ADI AR 2206Hᴾ | <<locked>> | 100% | 55,550 psi | 90% | 3576 fps | 95.8% |
| ADI AR 2207 | <<locked>> | 88% | 54,998 psi | 89% | 3491 fps | 100% |
| ADI AR 2219 | <<locked>> | 90% | 53,925 psi | 87% | 3553 fps | 99.5% |
| ADI Benchmark 8208 | <<locked>> | 98% | 55,027 psi | 89% | 3537 fps | 97.1% |
| Alliant AR-Comp | <<locked>> | 98% | 52,388 psi | 84% | 3560 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 94% | 55,564 psi | 90% | 3665 fps | 96.6% |
| Alliant Reloder-10x | <<locked>> | 94% | 56,101 psi | 90% | 3556 fps | 100% |
| Alliant Reloder-7 | <<locked>> | 86% | 53,461 psi | 86% | 3451 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 90% | 54,027 psi | 87% | 3415 fps | 99.7% |
| Hodgdon Benchmark | <<locked>> | 96% | 54,520 psi | 88% | 3481 fps | 97.6% |
| Hodgdon BL-C2 | <<locked>> | 98% | 53,272 psi | 86% | 3560 fps | 97.5% |
| Hodgdon H322 | <<locked>> | 94% | 55,912 psi | 90% | 3589 fps | 99.7% |
| Hodgdon H335 | <<locked>> | 92% | 53,650 psi | 87% | 3540 fps | 98.9% |
| Hodgdon H4198 | <<locked>> | 86% | 53,345 psi | 86% | 3438 fps | 99.2% |
| Hodgdon H4895ᴾ | <<locked>> | 100% | 55,912 psi | 90% | 3596 fps | 96.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,619 psi | 53% | 2201 fps | 100% |
| Hodgdon VARGETᴾ | <<locked>> | 100% | 54,534 psi | 88% | 3543 fps | 96.1% |
| IMR 3031ᴾ | <<locked>> | 100% | 53,156 psi | 86% | 3606 fps | 99.8% |
| IMR 4198 | <<locked>> | 92% | 53,708 psi | 87% | 3478 fps | 100% |
| IMR 4227 | <<locked>> | 82% | 53,084 psi | 86% | 3399 fps | 100% |
| IMR 8208 XBR | <<locked>> | 98% | 55,027 psi | 89% | 3537 fps | 97.1% |
| Lovex D073.4 | <<locked>> | 88% | 55,477 psi | 89% | 3556 fps | 98.5% |
| Lovex D073.5 | <<locked>> | 94% | 55,550 psi | 90% | 3533 fps | 98% |
| Lovex D073.6ᴾ | <<locked>> | 100% | 53,345 psi | 86% | 3550 fps | 98.4% |
| Lovex S053 | <<locked>> | 84% | 54,911 psi | 89% | 3386 fps | 100% |
| Norma 200 | <<locked>> | 88% | 53,229 psi | 86% | 3484 fps | 100% |
| Norma 201ᴾ | <<locked>> | 100% | 54,186 psi | 87% | 3524 fps | 97% |
| Norma 202ᴾ | <<locked>> | 100% | 54,157 psi | 87% | 3550 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,793 psi | 53% | 2257 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 82% | 53,519 psi | 86% | 3438 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 94% | 55,259 psi | 89% | 3550 fps | 98.4% |
| Rottweil R 901 | <<locked>> | 98% | 54,868 psi | 88% | 3530 fps | 98.9% |
| Rottweil R 902ᴾ | <<locked>> | 100% | 50,662 psi | 82% | 3445 fps | 96.2% |
| Shooters World AR Plus | <<locked>> | 88% | 55,477 psi | 89% | 3556 fps | 98.5% |
| Shooters World Match Rifleᴾ | <<locked>> | 100% | 53,345 psi | 86% | 3550 fps | 98.4% |
| Shooters World Tactical Rifle | <<locked>> | 90% | 52,388 psi | 84% | 3438 fps | 96.1% |
| SNPE Vectan BA6 1/2 | <<locked>> | 88% | 55,535 psi | 90% | 3209 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 90% | 54,549 psi | 88% | 3553 fps | 99% |
| SNPE Vectan SP 3 | <<locked>> | 92% | 53,795 psi | 87% | 3517 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 98% | 53,621 psi | 86% | 3438 fps | 98.8% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 46,064 psi | 74% | 3297 fps | 98.5% |
| Somchem S321 | <<locked>> | 94% | 53,156 psi | 86% | 3524 fps | 97.1% |
| Somchem S335ᴾ | <<locked>> | 100% | 55,825 psi | 90% | 3491 fps | 99.6% |
| Vihtavuori N120 | <<locked>> | 88% | 54,969 psi | 89% | 3428 fps | 100% |
| Vihtavuori N130 | <<locked>> | 94% | 53,388 psi | 86% | 3438 fps | 100% |
| Vihtavuori N133 | <<locked>> | 98% | 52,837 psi | 85% | 3435 fps | 99.9% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 48,254 psi | 78% | 3442 fps | 99.8% |
| Vihtavuori N140ᴾ | <<locked>> | 100% | 51,300 psi | 83% | 3458 fps | 98.9% |
| Vihtavuori N530 | <<locked>> | 98% | 56,014 psi | 90% | 3543 fps | 97.3% |
| Vihtavuori N540ᴾ | <<locked>> | 100% | 49,734 psi | 80% | 3442 fps | 98.3% |
| Winchester 748 | <<locked>> | 98% | 53,954 psi | 87% | 3586 fps | 97.8% |
| Winchester StaBALL Matchᴾ | <<locked>> | 100% | 53,345 psi | 86% | 3540 fps | 96% |
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% | 47,558 psi | 77% | 3294 fps | 99.9% |
| Accurate 2015 | <<locked>> | 80% | 31,575 psi | 51% | 2989 fps | 96.2% |
| Accurate 2460 | <<locked>> | 84% | 39,233 psi | 63% | 3205 fps | 95.6% |
| Accurate 2495 | <<locked>> | 86% | 29,515 psi | 48% | 2992 fps | 95.8% |
| Accurate 2520 | <<locked>> | 88% | 39,465 psi | 64% | 3248 fps | 95.2% |
| Accurate 4064 | <<locked>> | 94% | 36,622 psi | 59% | 3205 fps | 95.7% |
| Accurate LT-30 | <<locked>> | 80% | 40,393 psi | 65% | 3140 fps | 97.5% |
| Accurate LT-32 | <<locked>> | 80% | 40,683 psi | 66% | 3146 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 98% | 51,895 psi | 84% | 3507 fps | 95% |
| ADI AR 2207 | <<locked>> | 80% | 42,772 psi | 69% | 3271 fps | 100% |
| ADI AR 2219 | <<locked>> | 80% | 38,319 psi | 62% | 3222 fps | 96.7% |
| ADI Benchmark 8208 | <<locked>> | 94% | 48,428 psi | 78% | 3409 fps | 95.6% |
| Alliant AR-Comp | <<locked>> | 80% | 28,863 psi | 47% | 2999 fps | 97.7% |
| Alliant Power Pro 1200-R | <<locked>> | 92% | 52,214 psi | 84% | 3602 fps | 95.8% |
| Alliant Reloder-10x | <<locked>> | 80% | 36,260 psi | 58% | 3146 fps | 98.6% |
| Alliant Reloder-7 | <<locked>> | 80% | 44,164 psi | 71% | 3274 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 39,001 psi | 63% | 3114 fps | 97.5% |
| Hodgdon Benchmark | <<locked>> | 90% | 45,411 psi | 73% | 3301 fps | 95.5% |
| Hodgdon BL-C2 | 37.5 gr | 94% | 46,224 psi | 75% | 3422 fps | 95.9% |
| Hodgdon H322 | 30 gr | 80% | 35,041 psi | 57% | 3130 fps | 95.5% |
| Hodgdon H335 | <<locked>> | 82% | 37,855 psi | 61% | 3199 fps | 95.4% |
| Hodgdon H4198 | <<locked>> | 80% | 44,440 psi | 72% | 3258 fps | 97.8% |
| Hodgdon H4895 | <<locked>> | 96% | 49,110 psi | 79% | 3465 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,091 psi | 39% | 1978 fps | 100% |
| Hodgdon VARGET | <<locked>> | 98% | 50,879 psi | 82% | 3471 fps | 95.3% |
| IMR 3031 | <<locked>> | 86% | 33,417 psi | 54% | 3146 fps | 95.9% |
| IMR 4198 | <<locked>> | 80% | 37,565 psi | 61% | 3146 fps | 99.4% |
| IMR 4227 | <<locked>> | 80% | 49,806 psi | 80% | 3340 fps | 100% |
| IMR 8208 XBR | <<locked>> | 94% | 48,428 psi | 78% | 3409 fps | 95.6% |
| Lovex D073.4 | <<locked>> | 80% | 41,510 psi | 67% | 3274 fps | 95.5% |
| Lovex D073.5 | <<locked>> | 88% | 44,918 psi | 72% | 3330 fps | 95.8% |
| Lovex D073.6 | <<locked>> | 92% | 40,234 psi | 65% | 3278 fps | 95.4% |
| Lovex S053 | <<locked>> | 80% | 49,008 psi | 79% | 3287 fps | 100% |
| Norma 200 | <<locked>> | 80% | 40,901 psi | 66% | 3241 fps | 99.7% |
| Norma 201 | <<locked>> | 96% | 47,514 psi | 77% | 3392 fps | 95.5% |
| Norma 202 | <<locked>> | 88% | 36,463 psi | 59% | 3163 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,047 psi | 39% | 2021 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 50,372 psi | 81% | 3383 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 42,641 psi | 69% | 3291 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 86% | 38,014 psi | 61% | 3166 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 98% | 47,659 psi | 77% | 3383 fps | 95.5% |
| Shooters World AR Plus | <<locked>> | 80% | 41,510 psi | 67% | 3274 fps | 95.5% |
| Shooters World Match Rifle | <<locked>> | 92% | 40,234 psi | 65% | 3278 fps | 95.4% |
| Shooters World Tactical Rifle | <<locked>> | 88% | 48,849 psi | 79% | 3369 fps | 95.2% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 44,759 psi | 72% | 3038 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 38,711 psi | 62% | 3215 fps | 95.5% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 36,811 psi | 59% | 3156 fps | 97.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 36,869 psi | 59% | 3077 fps | 95% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 33,634 psi | 54% | 3005 fps | 95.1% |
| Somchem S321 | <<locked>> | 90% | 46,325 psi | 75% | 3386 fps | 95.5% |
| Somchem S335 | <<locked>> | 86% | 35,868 psi | 58% | 3074 fps | 95.8% |
| Vihtavuori N120 | <<locked>> | 80% | 42,859 psi | 69% | 3219 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 34,751 psi | 56% | 3041 fps | 98.1% |
| Vihtavuori N133 | <<locked>> | 80% | 30,226 psi | 49% | 2920 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 84% | 28,790 psi | 46% | 2959 fps | 95.2% |
| Vihtavuori N140 | <<locked>> | 90% | 37,014 psi | 60% | 3150 fps | 95.6% |
| Vihtavuori N530 | <<locked>> | 92% | 46,021 psi | 74% | 3350 fps | 95% |
| Vihtavuori N540 | <<locked>> | 92% | 38,029 psi | 61% | 3182 fps | 95.3% |
| Winchester 748 | 36.1 gr | 92% | 44,106 psi | 71% | 3383 fps | 95.5% |
| Winchester StaBALL Match | <<locked>> | 98% | 49,763 psi | 80% | 3468 fps | 95.2% |
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 60 powders for 6 mm GT loaded with the .243 | 60gr | Berger M. Alliant Power Pro 1200-R delivers the highest muzzle velocity at 3,665 fps; across all powders the maximum-charge window runs from 2,201 fps to 3,665 fps. Accurate 2495 gives the best case fill at 100 %, and 60 of the 60 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (427 MPa), the top charges use 53–90 %, leaving at least 10 % headroom. The 60.0 gr projectile in 0.243" calls for a 1:12.5 twist; slower twists will usually not stabilise this weight. Accurate 2495, Accurate 4064, ADI AR 2206H 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. Winchester 748, Hodgdon H322, Hodgdon BL-C2 rank at the top here: for 6 mm GT with the .243 | 60gr | Berger M 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.