Load Specifications
Load data in caliber 6 x 52 R BB2 with .243 | 73gr | SUS-TAC HPT bullet and 32 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 3031, Alliant AR-Comp and Lovex D073.6.
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: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 88% | 41,669 psi | 87% | 2890 fps | 99.5% |
| Accurate 2460 | <<locked>> | 86% | 42,699 psi | 89% | 2927 fps | 97.6% |
| Accurate 2495 | <<locked>> | 96% | 42,337 psi | 88% | 2966 fps | 99.7% |
| Accurate 2520 | <<locked>> | 90% | 43,076 psi | 90% | 2972 fps | 97.3% |
| Accurate 4064 | <<locked>> | 98% | 42,438 psi | 89% | 2986 fps | 98.3% |
| ADI AR 2219 | <<locked>> | 82% | 41,495 psi | 87% | 2936 fps | 98.4% |
| Alliant AR-Comp | <<locked>> | 90% | 40,843 psi | 85% | 2966 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 42,018 psi | 88% | 2917 fps | 99.9% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 42,134 psi | 88% | 2831 fps | 98.9% |
| Hodgdon H322 | <<locked>> | 86% | 43,236 psi | 90% | 2969 fps | 98.7% |
| Hodgdon H335 | <<locked>> | 84% | 41,394 psi | 86% | 2930 fps | 97.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,982 psi | 69% | 1923 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 41,510 psi | 87% | 2999 fps | 99.1% |
| IMR 4198 | <<locked>> | 84% | 43,178 psi | 90% | 2900 fps | 100% |
| Lovex D073.5 | <<locked>> | 86% | 42,438 psi | 89% | 2920 fps | 96.2% |
| Lovex D073.6 | <<locked>> | 92% | 40,799 psi | 85% | 2940 fps | 96.7% |
| Norma 202 | <<locked>> | 92% | 42,163 psi | 88% | 2943 fps | 97.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,938 psi | 69% | 1965 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 43,076 psi | 90% | 2940 fps | 96.8% |
| Rottweil R 901 | <<locked>> | 88% | 41,205 psi | 86% | 2887 fps | 97.2% |
| Shooters World Match Rifle | <<locked>> | 92% | 40,799 psi | 85% | 2940 fps | 96.7% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 42,293 psi | 88% | 2940 fps | 97.6% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 42,424 psi | 89% | 2920 fps | 99.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 42,511 psi | 89% | 2858 fps | 97.6% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 41,176 psi | 86% | 2844 fps | 98.3% |
| Somchem S335 | <<locked>> | 90% | 41,234 psi | 86% | 2851 fps | 98.2% |
| Vihtavuori N130 | <<locked>> | 86% | 42,293 psi | 88% | 2861 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 90% | 42,090 psi | 88% | 2867 fps | 99.5% |
| Vihtavuori N135 | <<locked>> | 96% | 43,163 psi | 90% | 2972 fps | 99.8% |
| Vihtavuori N140 | <<locked>> | 94% | 42,511 psi | 89% | 2923 fps | 98.1% |
| Vihtavuori N540 | <<locked>> | 94% | 41,075 psi | 86% | 2907 fps | 97.3% |
| Winchester 748 | <<locked>> | 90% | 41,582 psi | 87% | 2963 fps | 95.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 23.62"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 32,256 psi | 67% | 2674 fps | 97.5% |
| Accurate 2460 | <<locked>> | 80% | 34,563 psi | 72% | 2746 fps | 95.1% |
| Accurate 2495 | <<locked>> | 82% | 26,498 psi | 55% | 2575 fps | 95.7% |
| Accurate 2520 | <<locked>> | 86% | 37,347 psi | 78% | 2851 fps | 95.7% |
| Accurate 4064 | <<locked>> | 90% | 32,460 psi | 68% | 2756 fps | 95.3% |
| ADI AR 2219 | <<locked>> | 80% | 39,044 psi | 82% | 2881 fps | 97.9% |
| Alliant AR-Comp | 25.3 gr | 80% | 29,573 psi | 62% | 2690 fps | 98.9% |
| Alliant Reloder-10x | <<locked>> | 80% | 36,811 psi | 77% | 2805 fps | 99.4% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 39,479 psi | 82% | 2776 fps | 98.4% |
| Hodgdon H322 | <<locked>> | 80% | 35,621 psi | 74% | 2799 fps | 96.9% |
| Hodgdon H335 | <<locked>> | 80% | 36,027 psi | 75% | 2805 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,337 psi | 51% | 1722 fps | 100% |
| IMR 3031 | 25.9 gr | 82% | 30,168 psi | 63% | 2710 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 38,203 psi | 80% | 2799 fps | 99.9% |
| Lovex D073.5 | <<locked>> | 84% | 39,537 psi | 83% | 2858 fps | 95.4% |
| Lovex D073.6 | 29.6 gr | 88% | 35,679 psi | 75% | 2822 fps | 95% |
| Norma 202 | <<locked>> | 86% | 34,853 psi | 73% | 2779 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,424 psi | 51% | 1765 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 82% | 37,898 psi | 79% | 2825 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 84% | 36,318 psi | 76% | 2776 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 88% | 35,679 psi | 75% | 2822 fps | 95% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 39,465 psi | 82% | 2877 fps | 96.9% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 37,478 psi | 78% | 2815 fps | 98.2% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 35,041 psi | 73% | 2694 fps | 95.5% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 32,227 psi | 67% | 2641 fps | 95.8% |
| Somchem S335 | <<locked>> | 82% | 32,358 psi | 68% | 2644 fps | 95.6% |
| Vihtavuori N130 | <<locked>> | 80% | 35,302 psi | 74% | 2710 fps | 99% |
| Vihtavuori N133 | <<locked>> | 80% | 30,748 psi | 64% | 2605 fps | 96.8% |
| Vihtavuori N135 | <<locked>> | 80% | 25,831 psi | 54% | 2539 fps | 95% |
| Vihtavuori N140 | <<locked>> | 86% | 33,098 psi | 69% | 2710 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 90% | 36,158 psi | 76% | 2795 fps | 95.8% |
| Winchester 748 | <<locked>> | 88% | 39,218 psi | 82% | 2910 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 32 powders for 6 x 52 R BB2 loaded with the .243 | 73gr | SUS-TAC HPT. IMR 3031 delivers the highest muzzle velocity at 2,999 fps; across all powders the maximum-charge window runs from 1,923 fps to 2,999 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 32 of the 32 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 69–90 %, leaving at least 10 % headroom. The 73.0 gr projectile in 0.243" calls for a 1:8.5 twist; slower twists will usually not stabilise this weight. Hodgdon TrailBoss, ReloadSwiss RS 14 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. IMR 3031, Alliant AR-Comp, Lovex D073.6 rank at the top here: for 6 x 52 R BB2 with the .243 | 73gr | SUS-TAC HPT 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.