Load Specifications
Load data in caliber .375 Chey Tac with .375 | 425gr | CutEdge LZR bullet and 54 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Vihtavuori N570 and Alliant Reloder-50.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 29"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 84% | 56,898 psi | 89% | 2385 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 52,475 psi | 82% | 2477 fps | 100% |
| Accurate MAGPRO | <<locked>> | 82% | 56,217 psi | 88% | 2510 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 56,971 psi | 89% | 2493 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 56,478 psi | 89% | 2487 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 56,797 psi | 89% | 2635 fps | 100% |
| ADI AR 2225 | <<locked>> | 94% | 56,130 psi | 88% | 2507 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 57,624 psi | 90% | 2457 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 57,406 psi | 90% | 2484 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 55,840 psi | 88% | 2388 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 56,724 psi | 89% | 2467 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 54,607 psi | 86% | 2552 fps | 100% |
| Alliant Reloder-50 | <<locked>> | 96% | 54,389 psi | 85% | 2552 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 56,869 psi | 89% | 2474 fps | 100% |
| Bofors RP15 | <<locked>> | 86% | 56,898 psi | 89% | 2480 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 56,391 psi | 88% | 2503 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 57,406 psi | 90% | 2484 fps | 100% |
| Hodgdon 50BMG | <<locked>> | 96% | 56,985 psi | 89% | 2562 fps | 96.8% |
| Hodgdon H1000 | <<locked>> | 88% | 53,882 psi | 84% | 2451 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,521 psi | 87% | 2434 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 54,505 psi | 85% | 2421 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 56,739 psi | 89% | 2559 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,159 psi | 60% | 1519 fps | 100% |
| Hodgdon US 869ᴾ | <<locked>> | 100% | 57,246 psi | 90% | 2536 fps | 98.7% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,521 psi | 87% | 2408 fps | 100% |
| IMR 7828 SSC | <<locked>> | 84% | 55,651 psi | 87% | 2484 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 57,667 psi | 90% | 2434 fps | 99.3% |
| IMR 8133 Enduron | <<locked>> | 96% | 54,882 psi | 86% | 2503 fps | 100% |
| Lovex D100 | <<locked>> | 92% | 54,781 psi | 86% | 2448 fps | 98.6% |
| Lovex S071 | <<locked>> | 88% | 55,405 psi | 87% | 2369 fps | 100% |
| Norma 217 | <<locked>> | 96% | 56,434 psi | 88% | 2516 fps | 100% |
| Norma MRP | <<locked>> | 82% | 57,580 psi | 90% | 2493 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 57,159 psi | 90% | 2500 fps | 100% |
| Ramshot LRT | <<locked>> | 96% | 56,246 psi | 88% | 2575 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 86% | 55,230 psi | 87% | 2438 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,204 psi | 61% | 1555 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 57,014 psi | 89% | 2546 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 55,796 psi | 87% | 2539 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 57,522 psi | 90% | 2448 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 92% | 54,781 psi | 86% | 2448 fps | 98.6% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 54,215 psi | 85% | 2480 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 57,159 psi | 90% | 2448 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 57,580 psi | 90% | 2418 fps | 100% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 47,398 psi | 74% | 2418 fps | 98.7% |
| Vihtavuori 24N41 | <<locked>> | 96% | 54,331 psi | 85% | 2493 fps | 98.2% |
| Vihtavuori N165 | <<locked>> | 84% | 54,172 psi | 85% | 2372 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 56,782 psi | 89% | 2474 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 82% | 57,421 psi | 90% | 2408 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 56,927 psi | 89% | 2510 fps | 100% |
| Vihtavuori N565 | <<locked>> | 86% | 54,418 psi | 85% | 2464 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 56,405 psi | 88% | 2539 fps | 100% |
| Vihtavuori N570 | <<locked>> | 90% | 53,969 psi | 85% | 2556 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 84% | 57,116 psi | 90% | 2477 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 57,435 psi | 90% | 2421 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% | 49,777 psi | 78% | 2303 fps | 100% |
| Accurate 8700 | <<locked>> | 84% | 29,225 psi | 46% | 2073 fps | 95% |
| Accurate MAGPRO | <<locked>> | 80% | 52,460 psi | 82% | 2461 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 49,690 psi | 78% | 2402 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 37,072 psi | 58% | 2211 fps | 100% |
| ADI AR 2218 | 106.4 gr | 80% | 31,488 psi | 49% | 2188 fps | 96.8% |
| ADI AR 2225 | <<locked>> | 80% | 34,258 psi | 54% | 2198 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 54,041 psi | 85% | 2415 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 50,285 psi | 79% | 2398 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,008 psi | 77% | 2310 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 43,134 psi | 68% | 2297 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 80% | 34,824 psi | 55% | 2234 fps | 97.9% |
| Alliant Reloder-50 | 108 gr | 80% | 29,950 psi | 47% | 2126 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 46,804 psi | 73% | 2336 fps | 99.8% |
| Bofors RP15 | <<locked>> | 80% | 46,789 psi | 73% | 2349 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 40,176 psi | 63% | 2277 fps | 100% |
| Bofors RP5 | <<locked>> | 80% | 50,285 psi | 79% | 2398 fps | 100% |
| Hodgdon 50BMG | <<locked>> | 92% | 49,632 psi | 78% | 2454 fps | 95.1% |
| Hodgdon H1000 | <<locked>> | 80% | 40,509 psi | 63% | 2270 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 51,808 psi | 81% | 2388 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 80% | 50,966 psi | 80% | 2375 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 42,453 psi | 67% | 2372 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,703 psi | 45% | 1358 fps | 100% |
| Hodgdon US 869 | <<locked>> | 92% | 43,207 psi | 68% | 2333 fps | 95.9% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,098 psi | 82% | 2365 fps | 100% |
| IMR 7828 SSC | <<locked>> | 80% | 48,501 psi | 76% | 2392 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 80% | 41,814 psi | 66% | 2205 fps | 96.7% |
| IMR 8133 Enduron | <<locked>> | 80% | 31,807 psi | 50% | 2142 fps | 99.5% |
| Lovex D100 | <<locked>> | 84% | 41,278 psi | 65% | 2244 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 42,873 psi | 67% | 2211 fps | 100% |
| Norma 217 | <<locked>> | 80% | 32,387 psi | 51% | 2162 fps | 100% |
| Norma MRP | <<locked>> | 80% | 53,751 psi | 84% | 2448 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 49,429 psi | 77% | 2408 fps | 100% |
| Ramshot LRT | <<locked>> | 88% | 42,322 psi | 66% | 2359 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 80% | 44,251 psi | 69% | 2300 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,486 psi | 46% | 1391 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 41,974 psi | 66% | 2356 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 38,276 psi | 60% | 2283 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 80% | 53,824 psi | 84% | 2405 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 84% | 41,278 psi | 65% | 2244 fps | 95.7% |
| SNPE Vectan SP 13 | <<locked>> | 84% | 31,227 psi | 49% | 2096 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 53,490 psi | 84% | 2402 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 53,983 psi | 85% | 2375 fps | 100% |
| Vihtavuori 20N29 | <<locked>> | 92% | 35,578 psi | 56% | 2215 fps | 95.7% |
| Vihtavuori 24N41 | <<locked>> | 88% | 40,770 psi | 64% | 2283 fps | 95% |
| Vihtavuori N165 | <<locked>> | 80% | 47,500 psi | 74% | 2287 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 40,538 psi | 64% | 2234 fps | 97.9% |
| Vihtavuori N555 | <<locked>> | 80% | 53,780 psi | 84% | 2369 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 53,156 psi | 83% | 2464 fps | 100% |
| Vihtavuori N565 | <<locked>> | 80% | 44,396 psi | 70% | 2326 fps | 100% |
| Vihtavuori N568 | <<locked>> | 80% | 39,508 psi | 62% | 2293 fps | 99.7% |
| Vihtavuori N570 | 104.2 gr | 80% | 37,608 psi | 59% | 2297 fps | 98.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 49,240 psi | 77% | 2388 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,096 psi | 79% | 2336 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 54 powders for .375 Chey Tac loaded with the .375 | 425gr | CutEdge LZR. ADI AR 2218 delivers the highest muzzle velocity at 2,635 fps; across all powders the maximum-charge window runs from 1,519 fps to 2,635 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 425.0 gr projectile in 0.375" calls for a 1:9.5 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. ADI AR 2218, Vihtavuori N570, Alliant Reloder-50 rank at the top here: for .375 Chey Tac with the .375 | 425gr | CutEdge LZR 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.