Load Specifications
Load data in caliber .375 Chey Tac with .375 | 400gr | CutEdge MTH bullet and 57 powders. The key underlying parameters are shown in the table above.
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>> | 84% | 56,289 psi | 88% | 2461 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 51,909 psi | 81% | 2546 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 82% | 55,666 psi | 87% | 2585 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 57,638 psi | 90% | 2543 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 56,449 psi | 88% | 2572 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 55,927 psi | 88% | 2562 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 56,202 psi | 88% | 2707 fps | 100% |
| ADI AR 2225 | <<locked>> | 94% | 55,637 psi | 87% | 2585 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 57,624 psi | 90% | 2539 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 57,058 psi | 89% | 2533 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 56,884 psi | 89% | 2562 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 55,376 psi | 87% | 2464 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 56,130 psi | 88% | 2543 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 54,070 psi | 85% | 2625 fps | 100% |
| Alliant Reloder-50 | <<locked>> | 96% | 53,838 psi | 84% | 2625 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 56,478 psi | 89% | 2546 fps | 100% |
| Bofors RP15 | <<locked>> | 86% | 56,376 psi | 88% | 2556 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 55,796 psi | 87% | 2575 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 56,884 psi | 89% | 2562 fps | 100% |
| Hodgdon 50BMG | <<locked>> | 96% | 56,463 psi | 88% | 2635 fps | 96.2% |
| Hodgdon H1000 | <<locked>> | 90% | 57,406 psi | 90% | 2572 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 54,984 psi | 86% | 2510 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 84% | 57,740 psi | 90% | 2543 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 55,999 psi | 88% | 2635 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,087 psi | 60% | 1578 fps | 100% |
| Hodgdon US 869ᴾ | <<locked>> | 100% | 56,710 psi | 89% | 2605 fps | 98.3% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,158 psi | 86% | 2487 fps | 100% |
| IMR 7828 SSC | <<locked>> | 84% | 55,158 psi | 86% | 2559 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 57,246 psi | 90% | 2510 fps | 99.1% |
| IMR 8133 Enduron | <<locked>> | 96% | 54,404 psi | 85% | 2579 fps | 100% |
| Lovex D100 | <<locked>> | 92% | 54,346 psi | 85% | 2516 fps | 98.2% |
| Lovex S071 | <<locked>> | 88% | 54,853 psi | 86% | 2444 fps | 100% |
| Norma 217 | <<locked>> | 96% | 55,869 psi | 88% | 2592 fps | 100% |
| Norma MRP | <<locked>> | 82% | 57,159 psi | 90% | 2572 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 56,565 psi | 89% | 2579 fps | 100% |
| Ramshot LRT | <<locked>> | 96% | 55,680 psi | 87% | 2644 fps | 98.4% |
| Ramshot Magnum | <<locked>> | 86% | 54,708 psi | 86% | 2513 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,088 psi | 61% | 1614 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 56,463 psi | 88% | 2621 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 55,230 psi | 87% | 2615 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 57,653 psi | 90% | 2513 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 56,971 psi | 89% | 2526 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 92% | 54,346 psi | 85% | 2516 fps | 98.2% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 53,679 psi | 84% | 2549 fps | 99.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 56,608 psi | 89% | 2523 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 57,087 psi | 89% | 2493 fps | 100% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 46,891 psi | 73% | 2480 fps | 98.3% |
| Vihtavuori 24N41 | <<locked>> | 96% | 53,853 psi | 84% | 2562 fps | 97.8% |
| Vihtavuori N165 | <<locked>> | 86% | 57,246 psi | 90% | 2487 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 56,420 psi | 88% | 2549 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 82% | 56,927 psi | 89% | 2487 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 56,478 psi | 89% | 2589 fps | 100% |
| Vihtavuori N565 | <<locked>> | 88% | 57,609 psi | 90% | 2585 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 55,782 psi | 87% | 2615 fps | 100% |
| Vihtavuori N570 | <<locked>> | 92% | 57,421 psi | 90% | 2684 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 84% | 56,463 psi | 88% | 2556 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 56,869 psi | 89% | 2497 fps | 100% |
Start Load - Barrel Length: 29"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 49,226 psi | 77% | 2375 fps | 100% |
| Accurate 8700 | <<locked>> | 86% | 31,067 psi | 49% | 2178 fps | 95.3% |
| Accurate MAGPRO | <<locked>> | 80% | 51,953 psi | 81% | 2536 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 53,911 psi | 84% | 2497 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 49,197 psi | 77% | 2477 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 36,651 psi | 57% | 2277 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 80% | 31,125 psi | 49% | 2241 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 80% | 33,866 psi | 53% | 2260 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 53,983 psi | 85% | 2493 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 53,476 psi | 84% | 2490 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 49,792 psi | 78% | 2470 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 48,544 psi | 76% | 2382 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 42,714 psi | 67% | 2369 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 80% | 34,403 psi | 54% | 2290 fps | 97.3% |
| Alliant Reloder-50 | <<locked>> | 82% | 31,908 psi | 50% | 2234 fps | 95.8% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 46,456 psi | 73% | 2405 fps | 99.6% |
| Bofors RP15 | <<locked>> | 80% | 46,325 psi | 73% | 2418 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 39,653 psi | 62% | 2339 fps | 100% |
| Bofors RP5 | <<locked>> | 80% | 49,792 psi | 78% | 2470 fps | 100% |
| Hodgdon 50BMG | <<locked>> | 94% | 52,750 psi | 83% | 2579 fps | 95.4% |
| Hodgdon H1000 | <<locked>> | 80% | 40,045 psi | 63% | 2336 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 51,300 psi | 80% | 2461 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 80% | 50,502 psi | 79% | 2451 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 41,945 psi | 66% | 2444 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,660 psi | 45% | 1411 fps | 100% |
| Hodgdon US 869 | <<locked>> | 92% | 42,743 psi | 67% | 2395 fps | 95.2% |
| IMR 4955 Enduron | <<locked>> | 80% | 51,764 psi | 81% | 2441 fps | 100% |
| IMR 7828 SSC | <<locked>> | 80% | 47,993 psi | 75% | 2464 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 80% | 41,437 psi | 65% | 2270 fps | 96.1% |
| IMR 8133 Enduron | <<locked>> | 80% | 31,415 psi | 49% | 2198 fps | 99.1% |
| Lovex D100 | <<locked>> | 84% | 40,814 psi | 64% | 2303 fps | 95% |
| Lovex S071 | <<locked>> | 80% | 42,511 psi | 67% | 2280 fps | 100% |
| Norma 217 | <<locked>> | 80% | 31,923 psi | 50% | 2221 fps | 100% |
| Norma MRP | <<locked>> | 80% | 53,316 psi | 84% | 2526 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 48,878 psi | 77% | 2480 fps | 100% |
| Ramshot LRT | <<locked>> | 88% | 41,916 psi | 66% | 2421 fps | 95.1% |
| Ramshot Magnum | <<locked>> | 80% | 43,787 psi | 69% | 2369 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,399 psi | 46% | 1444 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 41,350 psi | 65% | 2421 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 37,826 psi | 59% | 2346 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 80% | 54,172 psi | 85% | 2470 fps | 100% |
| Rottweil R 905 | <<locked>> | 80% | 53,417 psi | 84% | 2484 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 84% | 40,814 psi | 64% | 2303 fps | 95% |
| SNPE Vectan SP 13 | <<locked>> | 86% | 33,025 psi | 52% | 2201 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 53,084 psi | 83% | 2480 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 53,490 psi | 84% | 2451 fps | 100% |
| Vihtavuori 20N29 | <<locked>> | 94% | 37,797 psi | 59% | 2323 fps | 95.9% |
| Vihtavuori 24N41 | <<locked>> | 90% | 43,453 psi | 68% | 2402 fps | 95.3% |
| Vihtavuori N165 | <<locked>> | 80% | 46,978 psi | 74% | 2356 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 40,248 psi | 63% | 2300 fps | 97.4% |
| Vihtavuori N555 | <<locked>> | 80% | 53,287 psi | 84% | 2444 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 52,707 psi | 83% | 2539 fps | 100% |
| Vihtavuori N565 | <<locked>> | 80% | 43,990 psi | 69% | 2398 fps | 100% |
| Vihtavuori N568 | <<locked>> | 80% | 39,001 psi | 61% | 2356 fps | 99.4% |
| Vihtavuori N570 | <<locked>> | 80% | 37,246 psi | 58% | 2359 fps | 97.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 48,588 psi | 76% | 2464 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 49,588 psi | 78% | 2408 fps | 100% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 57 powders for .375 Chey Tac loaded with the .375 | 400gr | CutEdge MTH. ADI AR 2218 delivers the highest muzzle velocity at 2,707 fps; across all powders the maximum-charge window runs from 1,578 fps to 2,707 fps. Accurate 8700 gives the best case fill at 100 %, and 57 of the 57 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 400.0 gr projectile in 0.375" calls for a 1:10.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, Hodgdon US 869 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.