Load Specifications
Load data in caliber .33 Win. with .338 | 165gr | Impala LWHV LS bullet and 22 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant AR-Comp, Accurate 2015 and Accurate 2495.
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>> | 92% | 38,914 psi | 88% | 2487 fps | 98% |
| Accurate 2495ᴾ | <<locked>> | 100% | 38,334 psi | 87% | 2552 fps | 98.3% |
| Accurate LT-30 | <<locked>> | 84% | 39,987 psi | 90% | 2411 fps | 96.8% |
| ADI AR 2207 | <<locked>> | 82% | 39,450 psi | 89% | 2477 fps | 100% |
| ADI AR 2219 | <<locked>> | 86% | 39,537 psi | 89% | 2530 fps | 96.4% |
| Alliant AR-Comp | <<locked>> | 94% | 37,884 psi | 86% | 2549 fps | 99.6% |
| Alliant Reloder-10x | <<locked>> | 88% | 39,668 psi | 90% | 2516 fps | 99.1% |
| Baschieri & Pellagri 106 | <<locked>> | 84% | 37,942 psi | 86% | 2402 fps | 96.6% |
| Hodgdon H322 | <<locked>> | 90% | 37,753 psi | 85% | 2490 fps | 95.9% |
| Hodgdon H4198 | <<locked>> | 82% | 39,131 psi | 88% | 2405 fps | 95.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 32,416 psi | 73% | 1604 fps | 100% |
| IMR 3031ᴾ | <<locked>> | 100% | 39,349 psi | 89% | 2585 fps | 97.3% |
| IMR 4198 | <<locked>> | 86% | 39,088 psi | 88% | 2457 fps | 99.5% |
| Norma 200 | <<locked>> | 82% | 38,247 psi | 86% | 2464 fps | 99.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 32,401 psi | 73% | 1644 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 86% | 37,985 psi | 86% | 2467 fps | 97% |
| SNPE Vectan Tubal 5000ᴾ | <<locked>> | 100% | 38,566 psi | 87% | 2438 fps | 96% |
| Somchem S335 | <<locked>> | 94% | 39,131 psi | 88% | 2457 fps | 96.2% |
| Vihtavuori N120 | <<locked>> | 82% | 39,523 psi | 89% | 2441 fps | 100% |
| Vihtavuori N130 | <<locked>> | 88% | 38,218 psi | 86% | 2428 fps | 98.6% |
| Vihtavuori N133 | <<locked>> | 94% | 39,334 psi | 89% | 2461 fps | 97.9% |
| Vihtavuori N135ᴾ | <<locked>> | 100% | 39,088 psi | 88% | 2546 fps | 98.3% |
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 | 34.7 gr | 82% | 29,327 psi | 66% | 2267 fps | 95% |
| Accurate 2495 | 39 gr | 90% | 28,427 psi | 64% | 2329 fps | 95.3% |
| Accurate LT-30 | <<locked>> | 80% | 35,694 psi | 81% | 2323 fps | 95.5% |
| ADI AR 2207 | <<locked>> | 80% | 37,289 psi | 84% | 2438 fps | 100% |
| ADI AR 2219 | <<locked>> | 84% | 37,246 psi | 84% | 2480 fps | 95.7% |
| Alliant AR-Comp | 34.2 gr | 80% | 25,585 psi | 58% | 2221 fps | 95.7% |
| Alliant Reloder-10x | <<locked>> | 80% | 31,705 psi | 72% | 2339 fps | 97.2% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 33,678 psi | 76% | 2310 fps | 95.2% |
| Hodgdon H322 | <<locked>> | 88% | 35,766 psi | 81% | 2448 fps | 95.2% |
| Hodgdon H4198 | <<locked>> | 80% | 36,811 psi | 83% | 2359 fps | 95.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 24,076 psi | 54% | 1434 fps | 100% |
| IMR 3031 | <<locked>> | 94% | 33,330 psi | 75% | 2448 fps | 95.2% |
| IMR 4198 | <<locked>> | 80% | 33,185 psi | 75% | 2329 fps | 98.4% |
| Norma 200 | <<locked>> | 80% | 36,027 psi | 81% | 2418 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 24,207 psi | 55% | 1473 fps | 100% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 32,082 psi | 73% | 2329 fps | 95% |
| SNPE Vectan Tubal 5000 | <<locked>> | 98% | 36,550 psi | 83% | 2395 fps | 95.3% |
| Somchem S335 | <<locked>> | 92% | 36,927 psi | 83% | 2415 fps | 95.5% |
| Vihtavuori N120 | <<locked>> | 80% | 37,347 psi | 84% | 2402 fps | 100% |
| Vihtavuori N130 | <<locked>> | 80% | 30,661 psi | 69% | 2260 fps | 96.5% |
| Vihtavuori N133 | <<locked>> | 86% | 31,647 psi | 72% | 2293 fps | 95.6% |
| Vihtavuori N135 | <<locked>> | 90% | 29,762 psi | 67% | 2329 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 22 powders for .33 Win. loaded with the .338 | 165gr | Impala LWHV LS. IMR 3031 delivers the highest muzzle velocity at 2,585 fps; across all powders the maximum-charge window runs from 1,604 fps to 2,585 fps. Accurate 2495 gives the best case fill at 100 %, and 22 of the 22 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (305 MPa), the top charges use 73–90 %, leaving at least 10 % headroom. The 165.0 gr projectile in 0.338" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. Accurate 2495, Hodgdon TrailBoss, IMR 3031 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, Accurate 2015, Accurate 2495 rank at the top here: for .33 Win. with the .338 | 165gr | Impala LWHV LS 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.