Load Specifications
Load data in caliber .375 Chey Tac with .375 | 338gr | Lehigh Defense Match Solid bullet and 58 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Vihtavuori N570 and Alliant Reloder-33.
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>> | 88% | 57,043 psi | 89% | 2677 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 44,135 psi | 69% | 2615 fps | 97.8% |
| Accurate MAGPRO | <<locked>> | 88% | 57,087 psi | 89% | 2812 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 54,882 psi | 86% | 2720 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 57,043 psi | 89% | 2792 fps | 100% |
| ADI AR 2217 | <<locked>> | 96% | 55,811 psi | 87% | 2769 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 56,072 psi | 88% | 2907 fps | 99.9% |
| ADI AR 2225 | <<locked>> | 98% | 54,679 psi | 86% | 2792 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 54,491 psi | 85% | 2710 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 57,363 psi | 90% | 2782 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 55,564 psi | 87% | 2684 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 55,927 psi | 88% | 2759 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 56,072 psi | 88% | 2772 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 53,592 psi | 84% | 2822 fps | 99.6% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 52,837 psi | 83% | 2812 fps | 99.3% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 57,551 psi | 90% | 2759 fps | 99.8% |
| Bofors RP15 | <<locked>> | 90% | 56,681 psi | 89% | 2772 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 55,492 psi | 87% | 2785 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 57,363 psi | 90% | 2782 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 57,464 psi | 90% | 2785 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 55,999 psi | 88% | 2726 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 86% | 55,042 psi | 86% | 2713 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 55,216 psi | 87% | 2615 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 55,143 psi | 86% | 2851 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,681 psi | 59% | 1706 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 57,087 psi | 89% | 2684 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 55,753 psi | 87% | 2654 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 56,463 psi | 88% | 2703 fps | 100% |
| IMR 7828 SSC | <<locked>> | 86% | 55,376 psi | 87% | 2776 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 92% | 54,940 psi | 86% | 2661 fps | 97.3% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 53,417 psi | 84% | 2779 fps | 100% |
| Lovex D100 | <<locked>> | 96% | 55,085 psi | 86% | 2707 fps | 96.6% |
| Lovex S071 | <<locked>> | 92% | 55,143 psi | 86% | 2654 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 54,650 psi | 86% | 2795 fps | 100% |
| Norma MRP | <<locked>> | 86% | 57,653 psi | 90% | 2795 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 55,390 psi | 87% | 2779 fps | 100% |
| Ramshot LRTᴾ | <<locked>> | 100% | 55,637 psi | 87% | 2831 fps | 96.6% |
| Ramshot Magnum | <<locked>> | 88% | 56,637 psi | 89% | 2746 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,696 psi | 61% | 1749 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 55,811 psi | 87% | 2838 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 54,926 psi | 86% | 2818 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 55,347 psi | 87% | 2690 fps | 100% |
| Rottweil R 905 | <<locked>> | 84% | 54,114 psi | 85% | 2700 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 96% | 55,085 psi | 86% | 2707 fps | 96.6% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 46,137 psi | 72% | 2625 fps | 97.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 57,450 psi | 90% | 2746 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 56,608 psi | 89% | 2680 fps | 100% |
| Somchem S365 | <<locked>> | 82% | 57,232 psi | 90% | 2671 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 54,433 psi | 85% | 2667 fps | 100% |
| Vihtavuori N165 | <<locked>> | 88% | 54,418 psi | 85% | 2657 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 57,116 psi | 90% | 2746 fps | 99% |
| Vihtavuori N555 | <<locked>> | 86% | 57,276 psi | 90% | 2707 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 57,087 psi | 89% | 2808 fps | 100% |
| Vihtavuori N565 | <<locked>> | 90% | 53,969 psi | 85% | 2749 fps | 100% |
| Vihtavuori N568 | <<locked>> | 94% | 55,463 psi | 87% | 2818 fps | 100% |
| Vihtavuori N570 | <<locked>> | 96% | 56,855 psi | 89% | 2887 fps | 99.7% |
| Winchester StaBALL HD | <<locked>> | 88% | 55,564 psi | 87% | 2772 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 55,259 psi | 87% | 2684 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% | 43,366 psi | 68% | 2490 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 38,058 psi | 60% | 2497 fps | 95.9% |
| Accurate MAGPRO | <<locked>> | 80% | 42,917 psi | 67% | 2585 fps | 98.7% |
| ADI AR 2209 | <<locked>> | 80% | 47,950 psi | 75% | 2618 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 43,105 psi | 68% | 2579 fps | 99.7% |
| ADI AR 2217 | <<locked>> | 80% | 31,894 psi | 50% | 2346 fps | 97.7% |
| ADI AR 2218 | <<locked>> | 88% | 35,984 psi | 56% | 2520 fps | 95.6% |
| ADI AR 2225 | <<locked>> | 80% | 29,138 psi | 46% | 2326 fps | 99.3% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,688 psi | 75% | 2612 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,787 psi | 69% | 2579 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 42,525 psi | 67% | 2503 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,767 psi | 58% | 2470 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 48,269 psi | 76% | 2667 fps | 100% |
| Alliant Reloder-33 | 119.1 gr | 84% | 33,924 psi | 53% | 2457 fps | 95% |
| Alliant Reloder-50 | <<locked>> | 90% | 36,085 psi | 57% | 2507 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 41,539 psi | 65% | 2500 fps | 97.5% |
| Bofors RP15 | <<locked>> | 80% | 40,683 psi | 64% | 2523 fps | 99.8% |
| Bofors RP30 | <<locked>> | 80% | 34,098 psi | 53% | 2418 fps | 98.5% |
| Bofors RP5 | <<locked>> | 80% | 43,787 psi | 69% | 2579 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 32,750 psi | 51% | 2369 fps | 98.5% |
| Hodgdon H4831 | <<locked>> | 80% | 40,277 psi | 63% | 2474 fps | 98.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,860 psi | 70% | 2556 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,619 psi | 81% | 2572 fps | 100% |
| Hodgdon Retumbo | 105.1 gr | 80% | 35,882 psi | 56% | 2526 fps | 99.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,268 psi | 44% | 1526 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 53,548 psi | 84% | 2638 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 49,124 psi | 77% | 2569 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,615 psi | 73% | 2556 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 80% | 44,672 psi | 70% | 2615 fps | 99.8% |
| IMR 7977 Enduron | <<locked>> | 86% | 45,266 psi | 71% | 2507 fps | 95.1% |
| IMR 8133 Enduron | <<locked>> | 80% | 26,614 psi | 42% | 2247 fps | 95.4% |
| Lovex D100 | <<locked>> | 94% | 51,213 psi | 80% | 2648 fps | 95.7% |
| Lovex S071 | <<locked>> | 80% | 37,376 psi | 59% | 2385 fps | 100% |
| Norma 217 | <<locked>> | 80% | 26,760 psi | 42% | 2274 fps | 97.9% |
| Norma MRP | <<locked>> | 80% | 46,528 psi | 73% | 2641 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 47,413 psi | 74% | 2664 fps | 100% |
| Ramshot LRT | <<locked>> | 98% | 51,764 psi | 81% | 2772 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 80% | 41,539 psi | 65% | 2530 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,022 psi | 45% | 1565 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 35,056 psi | 55% | 2503 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 31,865 psi | 50% | 2402 fps | 96.5% |
| Rottweil R 904 | <<locked>> | 80% | 48,646 psi | 76% | 2592 fps | 100% |
| Rottweil R 905 | <<locked>> | 80% | 47,282 psi | 74% | 2602 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 94% | 51,213 psi | 80% | 2648 fps | 95.7% |
| SNPE Vectan SP 13 | <<locked>> | 94% | 37,347 psi | 59% | 2464 fps | 95.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 46,934 psi | 74% | 2598 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 49,559 psi | 78% | 2582 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 53,505 psi | 84% | 2628 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 47,630 psi | 75% | 2572 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 41,582 psi | 65% | 2467 fps | 100% |
| Vihtavuori N170 | <<locked>> | 84% | 40,480 psi | 63% | 2477 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 80% | 47,007 psi | 74% | 2572 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 46,224 psi | 72% | 2644 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 80% | 38,174 psi | 60% | 2484 fps | 98.9% |
| Vihtavuori N568 | <<locked>> | 80% | 33,315 psi | 52% | 2421 fps | 96.4% |
| Vihtavuori N570 | 114.5 gr | 84% | 36,535 psi | 57% | 2526 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 40,973 psi | 64% | 2572 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 47,892 psi | 75% | 2579 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 58 powders for .375 Chey Tac loaded with the .375 | 338gr | Lehigh Defense Match Solid. ADI AR 2218 delivers the highest muzzle velocity at 2,907 fps; across all powders the maximum-charge window runs from 1,706 fps to 2,907 fps. Accurate 8700 gives the best case fill at 100 %, and 58 of the 58 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 338.0 gr projectile in 0.375" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 8700, ADI AR 2218, Alliant Reloder-50 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. Hodgdon Retumbo, Vihtavuori N570, Alliant Reloder-33 rank at the top here: for .375 Chey Tac with the .375 | 338gr | Lehigh Defense Match Solid 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.