Load Specifications
Load data in caliber .33 Win. with .338 | 160gr | Barnes TTSX FB bullet and 23 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 SNPE Vectan SP 3.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 94% | 39,450 psi | 89% | 2618 fps | 98.6% |
| Accurate 2495ᴾ | <<locked>> | 100% | 35,534 psi | 80% | 2621 fps | 98.2% |
| Accurate LT-30 | <<locked>> | 84% | 38,783 psi | 88% | 2510 fps | 97.1% |
| ADI AR 2207 | <<locked>> | 82% | 37,739 psi | 85% | 2566 fps | 100% |
| ADI AR 2219 | <<locked>> | 86% | 38,130 psi | 86% | 2621 fps | 96.7% |
| Alliant AR-Comp | <<locked>> | 96% | 38,798 psi | 88% | 2694 fps | 99.9% |
| Alliant Reloder-10x | <<locked>> | 88% | 37,869 psi | 86% | 2602 fps | 99.1% |
| Alliant Reloder-7 | <<locked>> | 82% | 39,204 psi | 89% | 2566 fps | 99.5% |
| Baschieri & Pellagri 106 | <<locked>> | 86% | 39,349 psi | 89% | 2543 fps | 97.5% |
| Hodgdon H322 | <<locked>> | 90% | 39,697 psi | 90% | 2654 fps | 97.1% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 31,343 psi | 71% | 1677 fps | 100% |
| IMR 3031 | <<locked>> | 98% | 39,349 psi | 89% | 2713 fps | 97.9% |
| IMR 4198 | <<locked>> | 86% | 37,840 psi | 86% | 2552 fps | 99.6% |
| Norma 200 | <<locked>> | 84% | 37,652 psi | 85% | 2582 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 31,299 psi | 71% | 1719 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 88% | 38,870 psi | 88% | 2608 fps | 97.8% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 37,478 psi | 85% | 2533 fps | 96.4% |
| Somchem S335 | <<locked>> | 96% | 39,581 psi | 89% | 2589 fps | 97% |
| Vihtavuori N120 | <<locked>> | 82% | 37,956 psi | 86% | 2530 fps | 100% |
| Vihtavuori N130 | <<locked>> | 90% | 38,812 psi | 88% | 2562 fps | 99.1% |
| Vihtavuori N133 | <<locked>> | 94% | 38,174 psi | 86% | 2559 fps | 98.2% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 37,840 psi | 86% | 2641 fps | 98.5% |
| Vihtavuori N140 | <<locked>> | 98% | 38,116 psi | 86% | 2602 fps | 96% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 84% | 28,543 psi | 65% | 2372 fps | 95.4% |
| Accurate 2495 | <<locked>> | 92% | 26,672 psi | 60% | 2405 fps | 95.2% |
| Accurate LT-30 | <<locked>> | 80% | 34,214 psi | 77% | 2411 fps | 95.7% |
| ADI AR 2207 | <<locked>> | 80% | 35,418 psi | 80% | 2520 fps | 100% |
| ADI AR 2219 | <<locked>> | 82% | 33,344 psi | 75% | 2513 fps | 95% |
| Alliant AR-Comp | 37.8 gr | 80% | 23,351 psi | 53% | 2277 fps | 95.2% |
| Alliant Reloder-10x | <<locked>> | 80% | 29,254 psi | 66% | 2402 fps | 96.9% |
| Alliant Reloder-7 | <<locked>> | 80% | 36,912 psi | 83% | 2520 fps | 99.2% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 32,213 psi | 73% | 2388 fps | 95.3% |
| Hodgdon H322 | <<locked>> | 86% | 34,693 psi | 78% | 2546 fps | 95.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 23,134 psi | 52% | 1503 fps | 100% |
| IMR 3031 | 43.4 gr | 92% | 32,561 psi | 74% | 2556 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 31,705 psi | 72% | 2411 fps | 98.4% |
| Norma 200 | <<locked>> | 80% | 33,069 psi | 75% | 2484 fps | 98.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 22,785 psi | 52% | 1532 fps | 100% |
| SNPE Vectan SP 3 | 37.9 gr | 82% | 32,314 psi | 73% | 2461 fps | 95.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 35,041 psi | 79% | 2484 fps | 95.6% |
| Somchem S335 | <<locked>> | 92% | 34,969 psi | 79% | 2493 fps | 95.6% |
| Vihtavuori N120 | <<locked>> | 80% | 35,650 psi | 81% | 2484 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 28,413 psi | 64% | 2323 fps | 96.3% |
| Vihtavuori N133 | <<locked>> | 86% | 29,805 psi | 67% | 2365 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 92% | 29,385 psi | 66% | 2444 fps | 95.9% |
| Vihtavuori N140 | <<locked>> | 96% | 35,926 psi | 81% | 2556 fps | 95.2% |
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 23 powders for .33 Win. loaded with the .338 | 160gr | Barnes TTSX FB. IMR 3031 delivers the highest muzzle velocity at 2,713 fps; across all powders the maximum-charge window runs from 1,677 fps to 2,713 fps. Accurate 2495 gives the best case fill at 100 %, and 23 of the 23 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (305 MPa), the top charges use 71–90 %, leaving at least 10 % headroom. The 160.0 gr projectile in 0.338" calls for a 1:14.0 twist; slower twists will usually not stabilise this weight. Accurate 2495, 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, SNPE Vectan SP 3 rank at the top here: for .33 Win. with the .338 | 160gr | Barnes TTSX FB 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.