Load Specifications
Load data in caliber .375 Chey Tac with .375 | 402gr | CutEdge MTAC bullet and 54 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% | 56,434 psi | 88% | 2454 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 52,127 psi | 82% | 2543 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 82% | 55,956 psi | 88% | 2582 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 56,594 psi | 89% | 2566 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 56,144 psi | 88% | 2556 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 56,405 psi | 88% | 2703 fps | 100% |
| ADI AR 2225 | <<locked>> | 94% | 55,840 psi | 88% | 2579 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 57,348 psi | 90% | 2533 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 57,043 psi | 89% | 2556 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 55,521 psi | 87% | 2461 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 56,304 psi | 88% | 2539 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 54,288 psi | 85% | 2621 fps | 100% |
| Alliant Reloder-50 | <<locked>> | 96% | 54,070 psi | 85% | 2621 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 56,623 psi | 89% | 2543 fps | 100% |
| Bofors RP15 | <<locked>> | 86% | 56,550 psi | 89% | 2552 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 55,985 psi | 88% | 2572 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 57,043 psi | 89% | 2556 fps | 100% |
| Hodgdon 50BMG | <<locked>> | 96% | 56,652 psi | 89% | 2631 fps | 96.3% |
| Hodgdon H1000 | <<locked>> | 90% | 57,595 psi | 90% | 2569 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,129 psi | 86% | 2503 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 54,157 psi | 85% | 2490 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 56,202 psi | 88% | 2631 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,130 psi | 60% | 1575 fps | 100% |
| Hodgdon US 869ᴾ | <<locked>> | 100% | 56,927 psi | 89% | 2605 fps | 98.4% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,303 psi | 87% | 2480 fps | 100% |
| IMR 7828 SSC | <<locked>> | 84% | 55,317 psi | 87% | 2556 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 57,551 psi | 90% | 2507 fps | 99.1% |
| IMR 8133 Enduron | <<locked>> | 96% | 54,607 psi | 86% | 2575 fps | 100% |
| Lovex D100 | <<locked>> | 92% | 54,520 psi | 85% | 2513 fps | 98.2% |
| Lovex S071 | <<locked>> | 88% | 55,013 psi | 86% | 2438 fps | 100% |
| Norma 217 | <<locked>> | 96% | 56,086 psi | 88% | 2589 fps | 100% |
| Norma MRP | <<locked>> | 82% | 57,319 psi | 90% | 2569 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 56,753 psi | 89% | 2572 fps | 100% |
| Ramshot LRT | <<locked>> | 96% | 55,898 psi | 88% | 2641 fps | 98.4% |
| Ramshot Magnum | <<locked>> | 86% | 54,882 psi | 86% | 2507 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,146 psi | 61% | 1611 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 56,695 psi | 89% | 2618 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 55,448 psi | 87% | 2612 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 57,101 psi | 89% | 2520 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 92% | 54,520 psi | 85% | 2513 fps | 98.2% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 53,882 psi | 84% | 2549 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 56,739 psi | 89% | 2520 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 57,217 psi | 90% | 2490 fps | 100% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 47,094 psi | 74% | 2480 fps | 98.4% |
| Vihtavuori 24N41 | <<locked>> | 96% | 54,056 psi | 85% | 2559 fps | 97.8% |
| Vihtavuori N165 | <<locked>> | 86% | 57,392 psi | 90% | 2484 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 56,594 psi | 89% | 2543 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 82% | 57,058 psi | 89% | 2480 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 56,652 psi | 89% | 2585 fps | 100% |
| Vihtavuori N565 | <<locked>> | 86% | 54,143 psi | 85% | 2536 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 55,970 psi | 88% | 2612 fps | 100% |
| Vihtavuori N570 | <<locked>> | 92% | 57,638 psi | 90% | 2680 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 84% | 56,681 psi | 89% | 2549 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 57,014 psi | 89% | 2493 fps | 100% |
Start Load - Barrel Length: 29"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 49,472 psi | 78% | 2372 fps | 100% |
| Accurate 8700 | <<locked>> | 86% | 31,198 psi | 49% | 2178 fps | 95.5% |
| Accurate MAGPRO | <<locked>> | 80% | 52,127 psi | 82% | 2530 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 49,313 psi | 77% | 2470 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 36,753 psi | 58% | 2274 fps | 99.9% |
| ADI AR 2218 | <<locked>> | 80% | 31,241 psi | 49% | 2238 fps | 96% |
| ADI AR 2225 | <<locked>> | 80% | 33,982 psi | 53% | 2257 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 53,751 psi | 84% | 2487 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 49,951 psi | 78% | 2467 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 48,675 psi | 76% | 2379 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 42,873 psi | 67% | 2362 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 80% | 34,534 psi | 54% | 2290 fps | 97.4% |
| Alliant Reloder-50 | <<locked>> | 82% | 32,039 psi | 50% | 2234 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 46,557 psi | 73% | 2402 fps | 99.6% |
| Bofors RP15 | <<locked>> | 80% | 46,441 psi | 73% | 2415 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 39,885 psi | 63% | 2339 fps | 100% |
| Bofors RP5 | <<locked>> | 80% | 49,951 psi | 78% | 2467 fps | 100% |
| Hodgdon 50BMG | <<locked>> | 94% | 52,939 psi | 83% | 2575 fps | 95.5% |
| Hodgdon H1000 | <<locked>> | 80% | 40,176 psi | 63% | 2333 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 51,576 psi | 81% | 2457 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 80% | 50,647 psi | 79% | 2444 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 42,076 psi | 66% | 2438 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,601 psi | 45% | 1407 fps | 100% |
| Hodgdon US 869 | <<locked>> | 92% | 42,902 psi | 67% | 2392 fps | 95.3% |
| IMR 4955 Enduron | <<locked>> | 80% | 51,880 psi | 81% | 2434 fps | 100% |
| IMR 7828 SSC | <<locked>> | 80% | 48,167 psi | 75% | 2461 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 80% | 41,524 psi | 65% | 2264 fps | 96.2% |
| IMR 8133 Enduron | <<locked>> | 80% | 31,517 psi | 49% | 2195 fps | 99.1% |
| Lovex D100 | <<locked>> | 84% | 40,944 psi | 64% | 2303 fps | 95.1% |
| Lovex S071 | <<locked>> | 80% | 42,598 psi | 67% | 2277 fps | 100% |
| Norma 217 | <<locked>> | 80% | 32,039 psi | 50% | 2218 fps | 100% |
| Norma MRP | <<locked>> | 80% | 53,461 psi | 84% | 2520 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 49,066 psi | 77% | 2477 fps | 100% |
| Ramshot LRT | <<locked>> | 88% | 42,061 psi | 66% | 2421 fps | 95.2% |
| Ramshot Magnum | <<locked>> | 80% | 43,947 psi | 69% | 2365 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,443 psi | 46% | 1440 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 41,510 psi | 65% | 2418 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 37,971 psi | 60% | 2343 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 80% | 53,548 psi | 84% | 2477 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 84% | 40,944 psi | 64% | 2303 fps | 95.1% |
| SNPE Vectan SP 13 | <<locked>> | 86% | 33,228 psi | 52% | 2201 fps | 95.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 53,200 psi | 83% | 2477 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 53,621 psi | 84% | 2448 fps | 100% |
| Vihtavuori 20N29 | <<locked>> | 92% | 35,317 psi | 55% | 2267 fps | 95% |
| Vihtavuori 24N41 | <<locked>> | 90% | 43,598 psi | 68% | 2398 fps | 95.4% |
| Vihtavuori N165 | <<locked>> | 80% | 47,224 psi | 74% | 2356 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 40,350 psi | 63% | 2293 fps | 97.5% |
| Vihtavuori N555 | <<locked>> | 80% | 53,417 psi | 84% | 2438 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 52,881 psi | 83% | 2536 fps | 100% |
| Vihtavuori N565 | <<locked>> | 80% | 44,106 psi | 69% | 2395 fps | 100% |
| Vihtavuori N568 | <<locked>> | 80% | 39,131 psi | 61% | 2352 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 80% | 37,376 psi | 59% | 2356 fps | 97.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 48,805 psi | 76% | 2457 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 49,734 psi | 78% | 2402 fps | 100% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 54 powders for .375 Chey Tac loaded with the .375 | 402gr | CutEdge MTAC. ADI AR 2218 delivers the highest muzzle velocity at 2,703 fps; across all powders the maximum-charge window runs from 1,575 fps to 2,703 fps. Accurate 8700 gives the best case fill at 100 %, and 54 of the 54 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 402.0 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.