Load Specifications
Load data in caliber 6 x 47 ATZL with .243 | 70gr | Speer TNT bullet and 37 powders. The key underlying parameters are shown in the table above.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 88% | 52,054 psi | 89% | 3005 fps | 99.9% |
| Accurate 2015ᴾ | <<locked>> | 100% | 47,921 psi | 82% | 3025 fps | 99.1% |
| Accurate 2460 | <<locked>> | 98% | 49,937 psi | 85% | 3074 fps | 97% |
| Accurate 2495ᴾ | <<locked>> | 100% | 35,911 psi | 61% | 2861 fps | 97.1% |
| Accurate LT-30 | <<locked>> | 94% | 52,185 psi | 89% | 3002 fps | 98.6% |
| Accurate LT-32 | <<locked>> | 94% | 52,692 psi | 90% | 3012 fps | 97% |
| ADI AR 2207 | <<locked>> | 92% | 51,010 psi | 87% | 3061 fps | 100% |
| ADI AR 2219 | <<locked>> | 96% | 53,055 psi | 90% | 3159 fps | 98.6% |
| Alliant AR-Compᴾ | <<locked>> | 100% | 44,193 psi | 75% | 3051 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 98% | 51,808 psi | 88% | 3117 fps | 99.9% |
| Alliant Reloder-7 | <<locked>> | 90% | 49,966 psi | 85% | 3018 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 94% | 50,633 psi | 86% | 2992 fps | 98.6% |
| Hodgdon H322 | <<locked>> | 98% | 51,184 psi | 87% | 3127 fps | 98.4% |
| Hodgdon H335 | <<locked>> | 98% | 52,576 psi | 90% | 3146 fps | 97.7% |
| Hodgdon H4198 | <<locked>> | 90% | 50,952 psi | 87% | 3002 fps | 97.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,705 psi | 54% | 1880 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 41,655 psi | 71% | 3009 fps | 97.3% |
| IMR 4198 | <<locked>> | 96% | 50,517 psi | 86% | 3048 fps | 100% |
| IMR 4227 | <<locked>> | 86% | 51,300 psi | 87% | 2989 fps | 100% |
| Lovex D073.4 | <<locked>> | 92% | 51,111 psi | 87% | 3100 fps | 96.5% |
| Lovex S053 | <<locked>> | 88% | 52,968 psi | 90% | 2986 fps | 100% |
| Norma 200 | <<locked>> | 94% | 51,779 psi | 88% | 3094 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,096 psi | 53% | 1913 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 86% | 50,981 psi | 87% | 3022 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 98% | 51,184 psi | 87% | 3094 fps | 96.3% |
| Rottweil R 901ᴾ | <<locked>> | 100% | 47,007 psi | 80% | 3015 fps | 96.4% |
| Shooters World AR Plus | <<locked>> | 92% | 51,111 psi | 87% | 3100 fps | 96.5% |
| SNPE Vectan BA6 1/2 | <<locked>> | 90% | 50,560 psi | 86% | 2785 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 94% | 50,270 psi | 86% | 3104 fps | 97.2% |
| SNPE Vectan SP 3 | <<locked>> | 98% | 52,620 psi | 90% | 3117 fps | 99.2% |
| SNPE Vectan Tubal 3000ᴾ | <<locked>> | 100% | 46,934 psi | 80% | 2943 fps | 96.4% |
| Somchem S335ᴾ | <<locked>> | 100% | 44,991 psi | 77% | 2936 fps | 97.1% |
| Vihtavuori N110 | <<locked>> | 82% | 51,735 psi | 88% | 2881 fps | 100% |
| Vihtavuori N120 | <<locked>> | 92% | 51,126 psi | 87% | 3012 fps | 100% |
| Vihtavuori N130ᴾ | <<locked>> | 100% | 52,837 psi | 90% | 3061 fps | 99.9% |
| Vihtavuori N133ᴾ | <<locked>> | 100% | 45,905 psi | 78% | 2949 fps | 98.7% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 37,898 psi | 65% | 2884 fps | 97.4% |
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 1680 | <<locked>> | 80% | 39,682 psi | 68% | 2779 fps | 98.5% |
| Accurate 2015 | <<locked>> | 88% | 32,489 psi | 55% | 2697 fps | 95.4% |
| Accurate 2460 | <<locked>> | 94% | 43,337 psi | 74% | 2953 fps | 95.4% |
| Accurate 2495 | <<locked>> | 96% | 31,314 psi | 53% | 2749 fps | 95.6% |
| Accurate LT-30 | <<locked>> | 82% | 36,405 psi | 62% | 2694 fps | 95% |
| Accurate LT-32 | <<locked>> | 88% | 44,092 psi | 75% | 2854 fps | 95% |
| ADI AR 2207 | <<locked>> | 80% | 35,302 psi | 60% | 2766 fps | 99.8% |
| ADI AR 2219 | <<locked>> | 86% | 37,942 psi | 65% | 2858 fps | 95.2% |
| Alliant AR-Comp | <<locked>> | 84% | 26,585 psi | 45% | 2592 fps | 95.3% |
| Alliant Reloder-10x | <<locked>> | 80% | 29,472 psi | 50% | 2631 fps | 95.5% |
| Alliant Reloder-7 | <<locked>> | 80% | 36,724 psi | 63% | 2756 fps | 98.3% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 36,782 psi | 63% | 2720 fps | 95.5% |
| Hodgdon H322 | <<locked>> | 90% | 39,276 psi | 67% | 2890 fps | 95.6% |
| Hodgdon H335 | <<locked>> | 92% | 42,873 psi | 73% | 2966 fps | 95.5% |
| Hodgdon H4198 | <<locked>> | 82% | 40,190 psi | 68% | 2792 fps | 95.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,264 psi | 40% | 1680 fps | 100% |
| IMR 3031 | <<locked>> | 96% | 36,724 psi | 63% | 2894 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 31,517 psi | 54% | 2638 fps | 97.2% |
| IMR 4227 | <<locked>> | 80% | 42,960 psi | 73% | 2844 fps | 100% |
| Lovex D073.4 | <<locked>> | 90% | 47,529 psi | 81% | 3038 fps | 95.7% |
| Lovex S053 | <<locked>> | 80% | 41,669 psi | 71% | 2795 fps | 100% |
| Norma 200 | <<locked>> | 80% | 33,431 psi | 57% | 2726 fps | 97.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,916 psi | 39% | 1716 fps | 100% |
| ReloadSwiss RS 36 | <<locked>> | 80% | 42,453 psi | 72% | 2871 fps | 99.9% |
| ReloadSwiss RS 40 | <<locked>> | 96% | 47,819 psi | 81% | 3035 fps | 95.6% |
| Rottweil R 901 | <<locked>> | 98% | 43,947 psi | 75% | 2953 fps | 95.6% |
| Shooters World AR Plus | <<locked>> | 90% | 47,529 psi | 81% | 3038 fps | 95.7% |
| SNPE Vectan BA6 1/2 | <<locked>> | 80% | 38,769 psi | 66% | 2595 fps | 100% |
| SNPE Vectan SP 10 | <<locked>> | 90% | 43,947 psi | 75% | 2982 fps | 95.8% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 34,113 psi | 58% | 2740 fps | 95% |
| SNPE Vectan Tubal 3000 | <<locked>> | 98% | 43,714 psi | 74% | 2884 fps | 95.6% |
| Somchem S335 | <<locked>> | 96% | 39,871 psi | 68% | 2831 fps | 95.7% |
| Vihtavuori N110 | <<locked>> | 80% | 48,646 psi | 83% | 2835 fps | 100% |
| Vihtavuori N120 | <<locked>> | 80% | 35,505 psi | 60% | 2730 fps | 100% |
| Vihtavuori N130 | <<locked>> | 82% | 30,487 psi | 52% | 2602 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 90% | 33,663 psi | 57% | 2690 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 94% | 31,459 psi | 54% | 2720 fps | 95.1% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 65 powders for 6 x 47 ATZL loaded with the .243 | 70gr | Speer TNT. Alliant Power Pro 1200-R delivers the highest muzzle velocity at 3,176 fps; across all powders the maximum-charge window runs from 1,880 fps to 3,176 fps. Accurate 2015 gives the best case fill at 100 %, and 65 of the 65 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (405 MPa), the top charges use 53–90 %, 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 2015, Accurate 2495, Accurate 2520 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. As outliers, Accurate 2200, Accurate 2230, Accurate 4064 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.