Load Specifications
Load data in caliber .375 Chey Tac with .375 | 400gr | CutEdge LZR bullet and 56 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Ramshot LRT and Vihtavuori N570.
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% | 55,390 psi | 87% | 2444 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 50,604 psi | 79% | 2526 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 82% | 54,650 psi | 86% | 2569 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 56,695 psi | 89% | 2530 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 55,535 psi | 87% | 2556 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 54,795 psi | 86% | 2546 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 54,955 psi | 86% | 2687 fps | 100% |
| ADI AR 2225 | <<locked>> | 94% | 54,331 psi | 85% | 2566 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 56,159 psi | 88% | 2520 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 84% | 55,999 psi | 88% | 2546 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 54,418 psi | 85% | 2451 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 55,071 psi | 86% | 2530 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 56,927 psi | 89% | 2657 fps | 100% |
| Alliant Reloder-50 | <<locked>> | 98% | 56,594 psi | 89% | 2657 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 55,564 psi | 87% | 2533 fps | 100% |
| Bofors RP15 | <<locked>> | 86% | 55,492 psi | 87% | 2543 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 54,665 psi | 86% | 2559 fps | 100% |
| Bofors RP5 | <<locked>> | 84% | 55,999 psi | 88% | 2546 fps | 100% |
| Hodgdon 50BMG | <<locked>> | 96% | 55,347 psi | 87% | 2612 fps | 95.8% |
| Hodgdon H1000 | <<locked>> | 90% | 56,231 psi | 88% | 2556 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 54,157 psi | 85% | 2493 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 84% | 56,884 psi | 89% | 2526 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 54,781 psi | 86% | 2618 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,087 psi | 60% | 1572 fps | 100% |
| Hodgdon US 869ᴾ | <<locked>> | 100% | 55,521 psi | 87% | 2585 fps | 98% |
| IMR 4955 Enduron | <<locked>> | 82% | 54,375 psi | 85% | 2470 fps | 100% |
| IMR 7828 SSC | <<locked>> | 84% | 54,201 psi | 85% | 2543 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 56,449 psi | 88% | 2490 fps | 98.9% |
| IMR 8133 Enduron | <<locked>> | 98% | 56,840 psi | 89% | 2608 fps | 100% |
| Lovex D100 | <<locked>> | 94% | 57,305 psi | 90% | 2549 fps | 98.5% |
| Lovex S071 | <<locked>> | 90% | 57,450 psi | 90% | 2470 fps | 100% |
| Norma 217 | <<locked>> | 96% | 54,578 psi | 86% | 2572 fps | 100% |
| Norma MRP | <<locked>> | 82% | 56,072 psi | 88% | 2556 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 55,434 psi | 87% | 2559 fps | 100% |
| Ramshot LRT | <<locked>> | 96% | 54,520 psi | 85% | 2625 fps | 98.1% |
| Ramshot Magnum | <<locked>> | 88% | 57,682 psi | 90% | 2543 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,102 psi | 61% | 1608 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 55,071 psi | 86% | 2605 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 54,027 psi | 85% | 2595 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 56,927 psi | 89% | 2500 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 56,014 psi | 88% | 2510 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 94% | 57,305 psi | 90% | 2549 fps | 98.5% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 52,576 psi | 82% | 2533 fps | 99.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 55,651 psi | 87% | 2507 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 56,217 psi | 88% | 2480 fps | 100% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 45,759 psi | 72% | 2461 fps | 98% |
| Vihtavuori 24N41 | <<locked>> | 98% | 56,536 psi | 89% | 2595 fps | 98.1% |
| Vihtavuori N165 | <<locked>> | 86% | 56,304 psi | 88% | 2470 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 55,347 psi | 87% | 2530 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 82% | 55,912 psi | 88% | 2470 fps | 100% |
| Vihtavuori N560 | <<locked>> | 82% | 55,434 psi | 87% | 2572 fps | 100% |
| Vihtavuori N565 | <<locked>> | 88% | 56,478 psi | 89% | 2569 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 54,694 psi | 86% | 2595 fps | 100% |
| Vihtavuori N570 | <<locked>> | 92% | 56,159 psi | 88% | 2664 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 84% | 55,216 psi | 87% | 2539 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 55,941 psi | 88% | 2484 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% | 48,428 psi | 76% | 2359 fps | 100% |
| Accurate 8700 | <<locked>> | 88% | 32,634 psi | 51% | 2215 fps | 95.9% |
| Accurate MAGPRO | <<locked>> | 80% | 50,937 psi | 80% | 2520 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 52,968 psi | 83% | 2480 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 48,254 psi | 76% | 2457 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 35,955 psi | 56% | 2260 fps | 99.8% |
| ADI AR 2218 | 108.6 gr | 80% | 30,458 psi | 48% | 2218 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 80% | 33,112 psi | 52% | 2244 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 52,707 psi | 83% | 2474 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 48,892 psi | 77% | 2454 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 47,674 psi | 75% | 2369 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 41,785 psi | 65% | 2352 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 80% | 33,576 psi | 53% | 2274 fps | 97% |
| Alliant Reloder-50 | <<locked>> | 82% | 31,125 psi | 49% | 2215 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 45,672 psi | 72% | 2388 fps | 99.5% |
| Bofors RP15 | <<locked>> | 80% | 45,527 psi | 71% | 2405 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 38,914 psi | 61% | 2326 fps | 100% |
| Bofors RP5 | <<locked>> | 80% | 48,892 psi | 77% | 2454 fps | 100% |
| Hodgdon 50BMG | <<locked>> | 94% | 51,677 psi | 81% | 2559 fps | 95% |
| Hodgdon H1000 | <<locked>> | 80% | 39,233 psi | 61% | 2320 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 50,589 psi | 79% | 2448 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 80% | 49,661 psi | 78% | 2434 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 40,959 psi | 64% | 2425 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,616 psi | 45% | 1404 fps | 100% |
| Hodgdon US 869 | <<locked>> | 94% | 44,933 psi | 70% | 2428 fps | 95.7% |
| IMR 4955 Enduron | <<locked>> | 80% | 50,952 psi | 80% | 2425 fps | 100% |
| IMR 7828 SSC | <<locked>> | 80% | 47,065 psi | 74% | 2448 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 80% | 40,843 psi | 64% | 2254 fps | 95.8% |
| IMR 8133 Enduron | <<locked>> | 80% | 30,690 psi | 48% | 2182 fps | 98.9% |
| Lovex D100 | <<locked>> | 86% | 43,033 psi | 67% | 2339 fps | 95.6% |
| Lovex S071 | <<locked>> | 80% | 41,814 psi | 66% | 2267 fps | 100% |
| Norma 217 | <<locked>> | 80% | 31,082 psi | 49% | 2201 fps | 99.9% |
| Norma MRP | <<locked>> | 80% | 52,228 psi | 82% | 2510 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 47,761 psi | 75% | 2461 fps | 100% |
| Ramshot LRT | 122 gr | 90% | 44,063 psi | 69% | 2457 fps | 95.7% |
| Ramshot Magnum | <<locked>> | 80% | 42,830 psi | 67% | 2352 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,356 psi | 46% | 1437 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 40,437 psi | 63% | 2405 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 36,941 psi | 58% | 2329 fps | 99.4% |
| Rottweil R 904 | <<locked>> | 80% | 53,403 psi | 84% | 2457 fps | 100% |
| Rottweil R 905 | <<locked>> | 80% | 52,475 psi | 82% | 2467 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 86% | 43,033 psi | 67% | 2339 fps | 95.6% |
| SNPE Vectan SP 13 | <<locked>> | 86% | 32,300 psi | 51% | 2182 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 52,141 psi | 82% | 2464 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 52,634 psi | 82% | 2434 fps | 100% |
| Vihtavuori 20N29 | <<locked>> | 94% | 36,898 psi | 58% | 2303 fps | 95.5% |
| Vihtavuori 24N41 | <<locked>> | 92% | 45,687 psi | 72% | 2434 fps | 95.8% |
| Vihtavuori N165 | <<locked>> | 80% | 46,282 psi | 73% | 2343 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 39,421 psi | 62% | 2280 fps | 97.1% |
| Vihtavuori N555 | <<locked>> | 80% | 52,402 psi | 82% | 2431 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 51,692 psi | 81% | 2523 fps | 100% |
| Vihtavuori N565 | <<locked>> | 80% | 43,134 psi | 68% | 2382 fps | 100% |
| Vihtavuori N568 | <<locked>> | 80% | 38,189 psi | 60% | 2339 fps | 99.2% |
| Vihtavuori N570 | 106.4 gr | 80% | 36,289 psi | 57% | 2336 fps | 97.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 47,514 psi | 74% | 2448 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 48,762 psi | 76% | 2392 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 56 powders for .375 Chey Tac loaded with the .375 | 400gr | CutEdge LZR. 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 56 of the 56 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 1:10.0 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, Ramshot LRT, Vihtavuori N570 rank at the top here: for .375 Chey Tac with the .375 | 400gr | 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.