Load Specifications
Load data in caliber .375 Chey Tac with .375 | 410gr | Berger Long Range Hybrid Target bullet and 44 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Hodgdon 50BMG and Hodgdon H1000.
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: 29"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 82% | 56,594 psi | 89% | 2434 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 56,840 psi | 89% | 2582 fps | 100% |
| ADI AR 2213 | <<locked>> | 82% | 56,376 psi | 88% | 2543 fps | 100% |
| ADI AR 2217 | <<locked>> | 90% | 56,376 psi | 88% | 2539 fps | 100% |
| ADI AR 2218 | <<locked>> | 94% | 56,855 psi | 89% | 2687 fps | 100% |
| ADI AR 2225 | <<locked>> | 92% | 56,362 psi | 88% | 2559 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 56,985 psi | 89% | 2533 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 82% | 55,506 psi | 87% | 2434 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 86% | 56,536 psi | 89% | 2516 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 54,839 psi | 86% | 2605 fps | 100% |
| Alliant Reloder-50 | <<locked>> | 94% | 55,230 psi | 87% | 2612 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 56,115 psi | 88% | 2520 fps | 100% |
| Bofors RP15 | <<locked>> | 84% | 56,623 psi | 89% | 2530 fps | 100% |
| Bofors RP30 | <<locked>> | 88% | 56,405 psi | 88% | 2556 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 56,985 psi | 89% | 2533 fps | 100% |
| Hodgdon 50BMG | <<locked>> | 94% | 56,869 psi | 89% | 2615 fps | 96.8% |
| Hodgdon H1000 | <<locked>> | 88% | 57,638 psi | 90% | 2546 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 57,421 psi | 90% | 2513 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 86% | 56,797 psi | 89% | 2612 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,334 psi | 60% | 1572 fps | 100% |
| Hodgdon US 869 | <<locked>> | 98% | 57,276 psi | 90% | 2592 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 82% | 55,259 psi | 87% | 2533 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 56,855 psi | 89% | 2484 fps | 99.3% |
| IMR 8133 Enduron | <<locked>> | 94% | 55,361 psi | 87% | 2562 fps | 100% |
| Lovex D100 | <<locked>> | 90% | 54,433 psi | 85% | 2497 fps | 98.5% |
| Lovex S071 | <<locked>> | 86% | 55,390 psi | 87% | 2421 fps | 100% |
| Norma 217 | <<locked>> | 94% | 57,058 psi | 89% | 2572 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 56,753 psi | 89% | 2549 fps | 100% |
| Ramshot LRT | <<locked>> | 94% | 56,246 psi | 88% | 2628 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 84% | 55,042 psi | 86% | 2487 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,363 psi | 62% | 1611 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 57,232 psi | 90% | 2598 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 55,941 psi | 88% | 2592 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 90% | 54,433 psi | 85% | 2497 fps | 98.5% |
| SNPE Vectan SP 13 | <<locked>> | 98% | 54,592 psi | 86% | 2536 fps | 100% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 51,619 psi | 81% | 2526 fps | 99.3% |
| Vihtavuori 24N41 | <<locked>> | 94% | 54,143 psi | 85% | 2543 fps | 98.2% |
| Vihtavuori N165 | <<locked>> | 84% | 57,232 psi | 90% | 2461 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 56,579 psi | 89% | 2523 fps | 99.9% |
| Vihtavuori N565 | <<locked>> | 84% | 54,375 psi | 85% | 2516 fps | 100% |
| Vihtavuori N568 | <<locked>> | 88% | 56,347 psi | 88% | 2592 fps | 100% |
| Vihtavuori N570 | <<locked>> | 88% | 54,201 psi | 85% | 2612 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 82% | 57,334 psi | 90% | 2530 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 56,681 psi | 89% | 2467 fps | 100% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 29"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 53,113 psi | 83% | 2392 fps | 100% |
| Accurate 8700 | <<locked>> | 82% | 29,863 psi | 47% | 2126 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 80% | 52,663 psi | 83% | 2493 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 39,856 psi | 62% | 2306 fps | 100% |
| ADI AR 2218 | 113.5 gr | 80% | 34,113 psi | 53% | 2293 fps | 97.8% |
| ADI AR 2225 | <<locked>> | 80% | 37,159 psi | 58% | 2293 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 53,359 psi | 84% | 2487 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 52,069 psi | 82% | 2395 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 46,340 psi | 73% | 2388 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 80% | 38,101 psi | 60% | 2339 fps | 98.7% |
| Alliant Reloder-50 | <<locked>> | 80% | 33,286 psi | 52% | 2238 fps | 96.9% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 49,255 psi | 77% | 2425 fps | 99.9% |
| Bofors RP15 | <<locked>> | 80% | 49,806 psi | 78% | 2441 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 43,337 psi | 68% | 2372 fps | 100% |
| Bofors RP5 | <<locked>> | 80% | 53,359 psi | 84% | 2487 fps | 100% |
| Hodgdon 50BMG | 121.7 gr | 90% | 49,719 psi | 78% | 2510 fps | 95.1% |
| Hodgdon H1000 | 107.6 gr | 80% | 43,453 psi | 68% | 2362 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 80% | 53,780 psi | 84% | 2467 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 45,861 psi | 72% | 2470 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,834 psi | 45% | 1404 fps | 100% |
| Hodgdon US 869 | <<locked>> | 88% | 40,611 psi | 64% | 2333 fps | 95% |
| IMR 7828 SSC | <<locked>> | 80% | 51,605 psi | 81% | 2487 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 80% | 44,135 psi | 69% | 2293 fps | 97.3% |
| IMR 8133 Enduron | <<locked>> | 80% | 34,708 psi | 54% | 2241 fps | 99.8% |
| Lovex D100 | <<locked>> | 82% | 41,205 psi | 65% | 2290 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 46,021 psi | 72% | 2300 fps | 100% |
| Norma 217 | <<locked>> | 80% | 35,491 psi | 56% | 2260 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 52,910 psi | 83% | 2503 fps | 100% |
| Ramshot LRT | <<locked>> | 86% | 42,511 psi | 67% | 2411 fps | 95.9% |
| Ramshot Magnum | <<locked>> | 80% | 47,659 psi | 75% | 2395 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,718 psi | 47% | 1440 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 45,643 psi | 72% | 2454 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 41,814 psi | 66% | 2388 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 82% | 41,205 psi | 65% | 2290 fps | 95.7% |
| SNPE Vectan SP 13 | <<locked>> | 82% | 31,836 psi | 50% | 2149 fps | 95.7% |
| Vihtavuori 20N29 | <<locked>> | 90% | 36,405 psi | 57% | 2270 fps | 95.9% |
| Vihtavuori 24N41 | <<locked>> | 86% | 40,988 psi | 64% | 2336 fps | 95.1% |
| Vihtavuori N165 | <<locked>> | 80% | 50,372 psi | 79% | 2375 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 43,424 psi | 68% | 2329 fps | 98.5% |
| Vihtavuori N565 | <<locked>> | 80% | 47,558 psi | 75% | 2421 fps | 100% |
| Vihtavuori N568 | <<locked>> | 80% | 42,728 psi | 67% | 2395 fps | 99.9% |
| Vihtavuori N570 | <<locked>> | 80% | 40,901 psi | 64% | 2402 fps | 99% |
| Winchester StaBALL HD | <<locked>> | 80% | 53,229 psi | 83% | 2484 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 53,040 psi | 83% | 2425 fps | 100% |
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 44 powders for .375 Chey Tac loaded with the .375 | 410gr | Berger Long Range Hybrid Target. ADI AR 2218 delivers the highest muzzle velocity at 2,687 fps; across all powders the maximum-charge window runs from 1,572 fps to 2,687 fps. Accurate 8700 gives the best case fill at 100 %, and 44 of the 44 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 410.0 gr projectile in 0.375" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, 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. ADI AR 2218, Hodgdon 50BMG, Hodgdon H1000 rank at the top here: for .375 Chey Tac with the .375 | 410gr | Berger Long Range Hybrid Target 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.