Load Specifications
Load data in caliber 6 x 52 R BB2 with .243 | 80gr | Barnes TTSX BT bullet and 43 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, IMR 3031 and Accurate 4064.
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 2015 | <<locked>> | 88% | 42,699 psi | 89% | 2795 fps | 99.9% |
| Accurate 2460 | <<locked>> | 84% | 40,828 psi | 85% | 2782 fps | 98% |
| Accurate 2495 | <<locked>> | 94% | 40,915 psi | 85% | 2825 fps | 99.9% |
| Accurate 2520 | <<locked>> | 88% | 41,553 psi | 87% | 2835 fps | 97.8% |
| Accurate 4064 | <<locked>> | 96% | 40,741 psi | 85% | 2841 fps | 98.6% |
| ADI AR 2219 | <<locked>> | 82% | 43,265 psi | 90% | 2854 fps | 99.3% |
| ADI Benchmark 8208 | <<locked>> | 88% | 41,800 psi | 87% | 2799 fps | 96% |
| Alliant AR-Comp | <<locked>> | 90% | 42,322 psi | 88% | 2874 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 43,076 psi | 90% | 2818 fps | 100% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 43,279 psi | 90% | 2746 fps | 99.5% |
| Hodgdon Benchmark | <<locked>> | 86% | 42,003 psi | 88% | 2762 fps | 96.7% |
| Hodgdon BL-C2 | <<locked>> | 90% | 42,467 psi | 89% | 2871 fps | 96.9% |
| Hodgdon H322 | <<locked>> | 84% | 41,916 psi | 88% | 2828 fps | 99.1% |
| Hodgdon H335 | <<locked>> | 84% | 42,801 psi | 89% | 2844 fps | 98.6% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,851 psi | 69% | 1831 fps | 100% |
| IMR 3031 | <<locked>> | 92% | 43,091 psi | 90% | 2913 fps | 99.7% |
| IMR 4198 | <<locked>> | 82% | 42,003 psi | 88% | 2759 fps | 100% |
| IMR 8208 XBR | <<locked>> | 88% | 41,800 psi | 87% | 2799 fps | 96% |
| Lovex D073.5 | <<locked>> | 84% | 40,654 psi | 85% | 2776 fps | 96.7% |
| Lovex D073.6 | <<locked>> | 92% | 42,395 psi | 89% | 2861 fps | 98% |
| Lovex S062 | <<locked>> | 94% | 41,321 psi | 86% | 2808 fps | 96% |
| Norma 201 | <<locked>> | 90% | 40,727 psi | 85% | 2782 fps | 95.8% |
| Norma 202 | <<locked>> | 90% | 40,959 psi | 86% | 2808 fps | 98.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 33,228 psi | 69% | 1883 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 41,771 psi | 87% | 2802 fps | 97.4% |
| ReloadSwiss RS 60 | <<locked>> | 98% | 42,119 psi | 88% | 2927 fps | 97.2% |
| Rottweil R 901 | <<locked>> | 88% | 41,916 psi | 88% | 2795 fps | 98.2% |
| Rottweil R 902 | <<locked>> | 92% | 41,365 psi | 86% | 2785 fps | 95.9% |
| Shooters World Match Rifle | <<locked>> | 92% | 42,395 psi | 89% | 2861 fps | 98% |
| Shooters World Precision | <<locked>> | 94% | 41,321 psi | 86% | 2808 fps | 96% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 41,394 psi | 86% | 2782 fps | 99.5% |
| SNPE Vectan Tubal 3000 | <<locked>> | 88% | 40,944 psi | 86% | 2720 fps | 98.1% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 42,540 psi | 89% | 2762 fps | 99.2% |
| Somchem S321 | <<locked>> | 86% | 42,206 psi | 88% | 2831 fps | 96.5% |
| Somchem S335 | <<locked>> | 90% | 42,308 psi | 88% | 2766 fps | 99.1% |
| Vihtavuori N130 | <<locked>> | 84% | 41,133 psi | 86% | 2726 fps | 100% |
| Vihtavuori N133 | <<locked>> | 88% | 40,727 psi | 85% | 2730 fps | 99.7% |
| Vihtavuori N135 | <<locked>> | 94% | 42,032 psi | 88% | 2835 fps | 99.9% |
| Vihtavuori N140 | <<locked>> | 92% | 41,394 psi | 86% | 2792 fps | 98.6% |
| Vihtavuori N150ᴾ | <<locked>> | 100% | 42,786 psi | 89% | 2828 fps | 96.9% |
| Vihtavuori N530 | <<locked>> | 88% | 41,785 psi | 87% | 2795 fps | 96.1% |
| Vihtavuori N540 | <<locked>> | 94% | 42,569 psi | 89% | 2828 fps | 98.4% |
| Winchester 748 | <<locked>> | 90% | 43,091 psi | 90% | 2887 fps | 97.4% |
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% | 32,793 psi | 69% | 2585 fps | 98.5% |
| Accurate 2460 | <<locked>> | 80% | 35,302 psi | 74% | 2661 fps | 96.5% |
| Accurate 2495 | <<locked>> | 80% | 25,063 psi | 52% | 2434 fps | 96% |
| Accurate 2520 | <<locked>> | 82% | 33,228 psi | 69% | 2648 fps | 95.3% |
| Accurate 4064 | 27.1 gr | 86% | 29,225 psi | 61% | 2569 fps | 95% |
| ADI AR 2219 | <<locked>> | 80% | 40,205 psi | 84% | 2795 fps | 98.8% |
| ADI Benchmark 8208 | <<locked>> | 86% | 39,349 psi | 82% | 2749 fps | 95.2% |
| Alliant AR-Comp | <<locked>> | 80% | 30,197 psi | 63% | 2605 fps | 99.6% |
| Alliant Reloder-10x | <<locked>> | 80% | 37,927 psi | 79% | 2717 fps | 99.8% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 40,495 psi | 85% | 2690 fps | 99.2% |
| Hodgdon Benchmark | <<locked>> | 82% | 36,927 psi | 77% | 2651 fps | 95.1% |
| Hodgdon BL-C2 | <<locked>> | 86% | 36,753 psi | 77% | 2746 fps | 95.2% |
| Hodgdon H322 | <<locked>> | 80% | 36,492 psi | 76% | 2713 fps | 98% |
| Hodgdon H335 | <<locked>> | 80% | 37,086 psi | 77% | 2726 fps | 97.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,410 psi | 51% | 1644 fps | 100% |
| IMR 3031 | 24.9 gr | 80% | 28,906 psi | 60% | 2575 fps | 96.3% |
| IMR 4198 | <<locked>> | 80% | 39,392 psi | 82% | 2707 fps | 100% |
| IMR 8208 XBR | <<locked>> | 86% | 39,349 psi | 82% | 2749 fps | 95.2% |
| Lovex D073.5 | <<locked>> | 80% | 35,143 psi | 73% | 2657 fps | 95% |
| Lovex D073.6 | <<locked>> | 86% | 34,229 psi | 72% | 2684 fps | 95.6% |
| Lovex S062 | <<locked>> | 92% | 38,827 psi | 81% | 2753 fps | 95.2% |
| Norma 201 | <<locked>> | 88% | 38,290 psi | 80% | 2730 fps | 95% |
| Norma 202 | <<locked>> | 82% | 31,575 psi | 66% | 2592 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,105 psi | 50% | 1677 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 36,535 psi | 76% | 2687 fps | 95.9% |
| ReloadSwiss RS 60 | 31.7 gr | 94% | 36,666 psi | 77% | 2792 fps | 95.1% |
| Rottweil R 901 | <<locked>> | 80% | 32,822 psi | 69% | 2585 fps | 95.5% |
| Rottweil R 902 | <<locked>> | 90% | 38,537 psi | 81% | 2723 fps | 95% |
| Shooters World Match Rifle | <<locked>> | 86% | 34,229 psi | 72% | 2684 fps | 95.6% |
| Shooters World Precision | <<locked>> | 92% | 38,827 psi | 81% | 2753 fps | 95.2% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 38,769 psi | 81% | 2730 fps | 99.1% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 31,792 psi | 66% | 2513 fps | 95.4% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 29,066 psi | 61% | 2461 fps | 95.6% |
| Somchem S321 | <<locked>> | 84% | 39,320 psi | 82% | 2769 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 30,951 psi | 65% | 2510 fps | 96.1% |
| Vihtavuori N130 | <<locked>> | 80% | 36,332 psi | 76% | 2628 fps | 99.6% |
| Vihtavuori N133 | <<locked>> | 80% | 31,662 psi | 66% | 2530 fps | 98% |
| Vihtavuori N135 | <<locked>> | 80% | 26,498 psi | 55% | 2467 fps | 96.5% |
| Vihtavuori N140 | <<locked>> | 82% | 29,704 psi | 62% | 2520 fps | 95% |
| Vihtavuori N150 | <<locked>> | 96% | 37,724 psi | 79% | 2723 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 86% | 39,247 psi | 82% | 2743 fps | 95.3% |
| Vihtavuori N540 | <<locked>> | 86% | 32,663 psi | 68% | 2608 fps | 95.6% |
| Winchester 748 | <<locked>> | 86% | 37,753 psi | 79% | 2776 fps | 95.8% |
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 43 powders for 6 x 52 R BB2 loaded with the .243 | 80gr | Barnes TTSX BT. ReloadSwiss RS 60 delivers the highest muzzle velocity at 2,927 fps; across all powders the maximum-charge window runs from 1,831 fps to 2,927 fps. Hodgdon TrailBoss gives the best case fill at 100 %, and 43 of the 43 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 80.0 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, Vihtavuori N150 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. ReloadSwiss RS 60, IMR 3031, Accurate 4064 rank at the top here: for 6 x 52 R BB2 with the .243 | 80gr | Barnes TTSX BT 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.