Load Specifications
Load data in caliber 6 x 52 R BB2 with .243 | 77gr | Hasler ARIETE bullet and 35 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are IMR 3031, Accurate 4064 and Accurate 2520.
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>> | 86% | 40,770 psi | 85% | 2802 fps | 99.6% |
| Accurate 2460 | <<locked>> | 84% | 41,495 psi | 87% | 2838 fps | 97.8% |
| Accurate 2495 | <<locked>> | 94% | 41,727 psi | 87% | 2881 fps | 99.8% |
| Accurate 2520 | <<locked>> | 88% | 42,003 psi | 88% | 2884 fps | 97.6% |
| Accurate 4064 | <<locked>> | 96% | 41,408 psi | 87% | 2897 fps | 98.5% |
| ADI AR 2219 | <<locked>> | 82% | 43,163 psi | 90% | 2900 fps | 99.1% |
| Alliant AR-Comp | <<locked>> | 90% | 42,641 psi | 89% | 2927 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 82% | 41,060 psi | 86% | 2825 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 86% | 42,061 psi | 88% | 2805 fps | 96.3% |
| Hodgdon BL-C2 | <<locked>> | 90% | 42,743 psi | 89% | 2920 fps | 96.6% |
| Hodgdon H322 | <<locked>> | 84% | 42,264 psi | 88% | 2881 fps | 98.9% |
| Hodgdon H335 | <<locked>> | 84% | 43,105 psi | 90% | 2894 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 33,431 psi | 70% | 1880 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 40,727 psi | 85% | 2910 fps | 99.3% |
| IMR 4198 | <<locked>> | 82% | 42,018 psi | 88% | 2805 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 41,263 psi | 86% | 2831 fps | 96.5% |
| Lovex D073.6 | <<locked>> | 92% | 42,801 psi | 89% | 2910 fps | 97.7% |
| Norma 202 | <<locked>> | 90% | 41,394 psi | 86% | 2861 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,446 psi | 70% | 1919 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 42,163 psi | 88% | 2854 fps | 97.2% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 42,279 psi | 88% | 2969 fps | 96.8% |
| Rottweil R 901 | <<locked>> | 88% | 42,772 psi | 89% | 2854 fps | 98% |
| Shooters World Match Rifle | <<locked>> | 92% | 42,801 psi | 89% | 2910 fps | 97.7% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 41,408 psi | 87% | 2831 fps | 99.3% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 41,437 psi | 87% | 2772 fps | 97.9% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 42,815 psi | 89% | 2808 fps | 99% |
| Somchem S321 | <<locked>> | 86% | 42,569 psi | 89% | 2881 fps | 96.2% |
| Somchem S335 | <<locked>> | 90% | 42,801 psi | 89% | 2818 fps | 98.9% |
| Vihtavuori N130 | <<locked>> | 84% | 41,263 psi | 86% | 2772 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 88% | 41,118 psi | 86% | 2779 fps | 99.6% |
| Vihtavuori N135 | <<locked>> | 94% | 42,395 psi | 89% | 2887 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 92% | 41,713 psi | 87% | 2841 fps | 98.4% |
| Vihtavuori N150 | <<locked>> | 98% | 40,451 psi | 85% | 2822 fps | 95.9% |
| Vihtavuori N540 | <<locked>> | 94% | 42,815 psi | 89% | 2874 fps | 98.2% |
| Winchester 748 | <<locked>> | 88% | 40,857 psi | 85% | 2884 fps | 96.4% |
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% | 33,562 psi | 70% | 2644 fps | 98.4% |
| Accurate 2460 | <<locked>> | 80% | 36,071 psi | 75% | 2720 fps | 96.3% |
| Accurate 2495 | <<locked>> | 80% | 25,860 psi | 54% | 2493 fps | 96% |
| Accurate 2520 | 28.1 gr | 82% | 33,866 psi | 71% | 2703 fps | 95% |
| Accurate 4064 | 27.4 gr | 86% | 30,168 psi | 63% | 2631 fps | 95% |
| ADI AR 2219 | <<locked>> | 80% | 40,582 psi | 85% | 2848 fps | 98.6% |
| Alliant AR-Comp | <<locked>> | 80% | 30,777 psi | 64% | 2661 fps | 99.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 38,189 psi | 80% | 2766 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 84% | 39,682 psi | 83% | 2753 fps | 95.6% |
| Hodgdon BL-C2 | <<locked>> | 88% | 39,842 psi | 83% | 2858 fps | 95.7% |
| Hodgdon H322 | <<locked>> | 80% | 36,999 psi | 77% | 2766 fps | 97.8% |
| Hodgdon H335 | <<locked>> | 80% | 37,492 psi | 78% | 2776 fps | 97% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,685 psi | 52% | 1680 fps | 100% |
| IMR 3031 | 25.1 gr | 80% | 29,240 psi | 61% | 2621 fps | 96% |
| IMR 4198 | <<locked>> | 80% | 39,465 psi | 82% | 2753 fps | 100% |
| Lovex D073.5 | <<locked>> | 82% | 38,450 psi | 80% | 2772 fps | 95.7% |
| Lovex D073.6 | <<locked>> | 86% | 34,809 psi | 73% | 2736 fps | 95.4% |
| Norma 202 | <<locked>> | 82% | 31,836 psi | 67% | 2635 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,439 psi | 51% | 1713 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 36,680 psi | 77% | 2733 fps | 95.5% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 39,523 psi | 83% | 2900 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 33,504 psi | 70% | 2638 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 86% | 34,809 psi | 73% | 2736 fps | 95.4% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 38,885 psi | 81% | 2776 fps | 98.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 32,111 psi | 67% | 2559 fps | 95% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 29,356 psi | 61% | 2503 fps | 95.2% |
| Somchem S321 | <<locked>> | 84% | 39,726 psi | 83% | 2822 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 31,357 psi | 66% | 2556 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 36,535 psi | 76% | 2674 fps | 99.5% |
| Vihtavuori N133 | <<locked>> | 80% | 31,894 psi | 67% | 2575 fps | 97.8% |
| Vihtavuori N135 | <<locked>> | 80% | 26,934 psi | 56% | 2516 fps | 96.3% |
| Vihtavuori N140 | <<locked>> | 84% | 32,140 psi | 67% | 2625 fps | 95.6% |
| Vihtavuori N150 | <<locked>> | 96% | 38,029 psi | 79% | 2769 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 86% | 33,156 psi | 69% | 2661 fps | 95.4% |
| Winchester 748 | <<locked>> | 86% | 38,116 psi | 80% | 2822 fps | 95.4% |
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 35 powders for 6 x 52 R BB2 loaded with the .243 | 77gr | Hasler ARIETE. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,969 fps; across all powders the maximum-charge window runs from 1,880 fps to 2,969 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 35 of the 35 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (330 MPa), the top charges use 70–90 %, leaving at least 10 % headroom. The 77.0 gr projectile in 0.243" calls for a 1:9.0 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, Accurate 4064, Accurate 2520 rank at the top here: for 6 x 52 R BB2 with the .243 | 77gr | Hasler ARIETE 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.