Load Specifications
Load data in caliber 6 x 52 R BB2 with .243 | 69gr | SUS-TAC HPPT bullet and 32 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant AR-Comp, IMR 3031 and Vihtavuori N135.
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>> | 90% | 42,772 psi | 89% | 2989 fps | 99.3% |
| Accurate 2460 | <<locked>> | 86% | 41,118 psi | 86% | 2969 fps | 96.7% |
| Accurate 2495 | <<locked>> | 96% | 40,901 psi | 85% | 3012 fps | 99.3% |
| Accurate 2520 | <<locked>> | 90% | 41,307 psi | 86% | 3009 fps | 96.3% |
| Accurate 4064 | <<locked>> | 98% | 40,524 psi | 85% | 3022 fps | 97.4% |
| Accurate LT-30 | <<locked>> | 82% | 42,206 psi | 88% | 2897 fps | 98.2% |
| Accurate LT-32 | <<locked>> | 82% | 42,569 psi | 89% | 2904 fps | 96.5% |
| ADI AR 2219 | <<locked>> | 84% | 43,105 psi | 90% | 3045 fps | 98.3% |
| Alliant AR-Comp | <<locked>> | 92% | 42,308 psi | 88% | 3074 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 40,379 psi | 84% | 2959 fps | 99.6% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 40,901 psi | 85% | 2877 fps | 98.3% |
| Hodgdon H322 | <<locked>> | 86% | 41,829 psi | 87% | 3015 fps | 98% |
| Hodgdon H335 | <<locked>> | 86% | 42,830 psi | 89% | 3031 fps | 97.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,648 psi | 68% | 1975 fps | 100% |
| IMR 3031 | <<locked>> | 94% | 42,960 psi | 90% | 3104 fps | 99% |
| IMR 4198 | <<locked>> | 84% | 41,713 psi | 87% | 2949 fps | 100% |
| Lovex D073.6 | <<locked>> | 94% | 42,047 psi | 88% | 3035 fps | 96.5% |
| Norma 202 | <<locked>> | 92% | 40,683 psi | 85% | 2986 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,576 psi | 68% | 2021 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 86% | 41,713 psi | 87% | 2982 fps | 95.9% |
| Rottweil R 901 | <<locked>> | 90% | 42,308 psi | 88% | 2986 fps | 96.9% |
| Shooters World Match Rifle | <<locked>> | 94% | 42,047 psi | 88% | 3035 fps | 96.5% |
| SNPE Vectan SP 10 | <<locked>> | 82% | 40,901 psi | 85% | 2982 fps | 96.7% |
| SNPE Vectan SP 3 | <<locked>> | 84% | 41,133 psi | 86% | 2969 fps | 98.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 41,249 psi | 86% | 2904 fps | 96.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 42,685 psi | 89% | 2946 fps | 98.2% |
| Somchem S335 | <<locked>> | 92% | 42,714 psi | 89% | 2953 fps | 98.1% |
| Vihtavuori N130 | <<locked>> | 86% | 41,089 psi | 86% | 2913 fps | 99.5% |
| Vihtavuori N133 | <<locked>> | 92% | 43,294 psi | 90% | 2966 fps | 99.3% |
| Vihtavuori N135 | <<locked>> | 96% | 41,437 psi | 87% | 3015 fps | 99.3% |
| Vihtavuori N140 | <<locked>> | 94% | 41,365 psi | 86% | 2972 fps | 97.4% |
| Vihtavuori N540 | <<locked>> | 96% | 42,351 psi | 88% | 3002 fps | 97.1% |
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% | 30,937 psi | 65% | 2707 fps | 96.5% |
| Accurate 2460 | <<locked>> | 84% | 38,348 psi | 80% | 2907 fps | 95.8% |
| Accurate 2495 | <<locked>> | 84% | 27,093 psi | 57% | 2661 fps | 95.3% |
| Accurate 2520 | <<locked>> | 88% | 38,479 psi | 80% | 2949 fps | 95.4% |
| Accurate 4064 | <<locked>> | 92% | 33,388 psi | 70% | 2851 fps | 95% |
| Accurate LT-30 | <<locked>> | 80% | 39,784 psi | 83% | 2844 fps | 97.7% |
| Accurate LT-32 | <<locked>> | 80% | 40,132 psi | 84% | 2851 fps | 95.8% |
| ADI AR 2219 | <<locked>> | 80% | 37,449 psi | 78% | 2917 fps | 96.9% |
| Alliant AR-Comp | 25.5 gr | 80% | 28,369 psi | 59% | 2720 fps | 98.1% |
| Alliant Reloder-10x | <<locked>> | 80% | 35,737 psi | 75% | 2854 fps | 98.9% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 38,363 psi | 80% | 2822 fps | 97.7% |
| Hodgdon H322 | <<locked>> | 80% | 34,519 psi | 72% | 2841 fps | 95.9% |
| Hodgdon H335 | <<locked>> | 82% | 37,333 psi | 78% | 2910 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,134 psi | 50% | 1772 fps | 100% |
| IMR 3031 | 26.8 gr | 84% | 31,038 psi | 65% | 2805 fps | 95.4% |
| IMR 4198 | <<locked>> | 80% | 37,289 psi | 78% | 2851 fps | 99.6% |
| Lovex D073.6 | <<locked>> | 92% | 39,523 psi | 83% | 2982 fps | 95.7% |
| Norma 202 | <<locked>> | 88% | 35,723 psi | 75% | 2867 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,178 psi | 51% | 1814 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 38,957 psi | 81% | 2920 fps | 95% |
| Rottweil R 901 | <<locked>> | 86% | 37,304 psi | 78% | 2871 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 92% | 39,523 psi | 83% | 2982 fps | 95.7% |
| SNPE Vectan SP 10 | <<locked>> | 80% | 38,203 psi | 80% | 2920 fps | 95.9% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 36,361 psi | 76% | 2861 fps | 97.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 36,158 psi | 76% | 2789 fps | 95.2% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 33,199 psi | 69% | 2730 fps | 95.5% |
| Somchem S335 | <<locked>> | 84% | 33,243 psi | 69% | 2736 fps | 95.3% |
| Vihtavuori N130 | <<locked>> | 80% | 34,345 psi | 72% | 2759 fps | 98.4% |
| Vihtavuori N133 | <<locked>> | 80% | 29,863 psi | 62% | 2648 fps | 95.9% |
| Vihtavuori N135 | 26.2 gr | 84% | 28,253 psi | 59% | 2684 fps | 95.6% |
| Vihtavuori N140 | <<locked>> | 88% | 33,968 psi | 71% | 2799 fps | 95% |
| Vihtavuori N540 | <<locked>> | 92% | 37,318 psi | 78% | 2890 fps | 95.6% |
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 | 69gr | SUS-TAC HPPT. IMR 3031 delivers the highest muzzle velocity at 3,104 fps; across all powders the maximum-charge window runs from 1,975 fps to 3,104 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 68–90 %, leaving at least 10 % headroom. The 69.0 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. Alliant AR-Comp, IMR 3031, Vihtavuori N135 rank at the top here: for 6 x 52 R BB2 with the .243 | 69gr | SUS-TAC HPPT 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.