Load Specifications
Load data in caliber .375 Chey Tac with .375 | 350gr | CutEdge MTH bullet and 60 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 Hodgdon Retumbo.
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>> | 86% | 55,651 psi | 87% | 2621 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 46,760 psi | 73% | 2625 fps | 98.7% |
| Accurate High Country | <<locked>> | 82% | 54,128 psi | 85% | 2736 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 54,955 psi | 86% | 2746 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 57,217 psi | 90% | 2710 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 55,854 psi | 88% | 2733 fps | 100% |
| ADI AR 2217 | <<locked>> | 94% | 54,766 psi | 86% | 2717 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 55,013 psi | 86% | 2854 fps | 100% |
| ADI AR 2225 | <<locked>> | 96% | 53,911 psi | 84% | 2736 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 57,348 psi | 90% | 2707 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 57,348 psi | 90% | 2707 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 56,724 psi | 89% | 2700 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 56,231 psi | 88% | 2726 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 54,520 psi | 85% | 2628 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 54,955 psi | 86% | 2703 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 54,882 psi | 86% | 2713 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 56,797 psi | 89% | 2828 fps | 99.9% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 56,405 psi | 88% | 2822 fps | 99.8% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 56,101 psi | 88% | 2703 fps | 99.9% |
| Bofors RP15 | <<locked>> | 88% | 55,564 psi | 87% | 2717 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 54,621 psi | 86% | 2733 fps | 100% |
| Bofors RP5 | <<locked>> | 86% | 56,231 psi | 88% | 2726 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 56,260 psi | 88% | 2733 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 54,592 psi | 86% | 2671 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 86% | 57,406 psi | 90% | 2707 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 57,450 psi | 90% | 2602 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 54,360 psi | 85% | 2795 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,884 psi | 59% | 1686 fps | 100% |
| Hodgdon US 869ᴾ | <<locked>> | 100% | 51,793 psi | 81% | 2687 fps | 96.1% |
| IMR 4955 Enduron | <<locked>> | 84% | 54,998 psi | 86% | 2648 fps | 100% |
| IMR 7828 SSC | <<locked>> | 86% | 54,288 psi | 85% | 2720 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 92% | 57,145 psi | 90% | 2661 fps | 98.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 56,478 psi | 89% | 2776 fps | 100% |
| Lovex D100 | <<locked>> | 94% | 53,795 psi | 84% | 2657 fps | 96.9% |
| Lovex S071 | <<locked>> | 92% | 57,682 psi | 90% | 2644 fps | 100% |
| Norma 217 | <<locked>> | 98% | 54,099 psi | 85% | 2743 fps | 100% |
| Norma MRP | <<locked>> | 84% | 56,275 psi | 88% | 2736 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 55,550 psi | 87% | 2736 fps | 100% |
| Ramshot LRT | <<locked>> | 98% | 54,636 psi | 86% | 2785 fps | 97% |
| Ramshot Magnum | <<locked>> | 88% | 53,853 psi | 84% | 2671 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,812 psi | 61% | 1726 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 54,795 psi | 86% | 2782 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 53,940 psi | 85% | 2766 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 57,508 psi | 90% | 2680 fps | 100% |
| Rottweil R 905 | <<locked>> | 84% | 56,463 psi | 88% | 2690 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 94% | 53,795 psi | 84% | 2657 fps | 96.9% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 48,805 psi | 76% | 2635 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 56,101 psi | 88% | 2687 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 55,013 psi | 86% | 2625 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 56,666 psi | 89% | 2657 fps | 100% |
| Vihtavuori 24N41ᴾ | <<locked>> | 100% | 56,927 psi | 89% | 2756 fps | 97.1% |
| Vihtavuori N165 | <<locked>> | 88% | 56,782 psi | 89% | 2648 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 55,767 psi | 87% | 2694 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 84% | 56,115 psi | 88% | 2651 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 55,709 psi | 87% | 2749 fps | 100% |
| Vihtavuori N565 | <<locked>> | 90% | 56,681 psi | 89% | 2743 fps | 100% |
| Vihtavuori N568 | <<locked>> | 92% | 54,607 psi | 86% | 2766 fps | 100% |
| Vihtavuori N570 | <<locked>> | 94% | 55,956 psi | 88% | 2835 fps | 99.8% |
| Winchester StaBALL HD | <<locked>> | 86% | 54,839 psi | 86% | 2717 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 56,492 psi | 89% | 2661 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% | 45,498 psi | 71% | 2484 fps | 100% |
| Accurate 8700 | <<locked>> | 92% | 34,838 psi | 55% | 2395 fps | 95.3% |
| Accurate High Country | <<locked>> | 80% | 50,401 psi | 79% | 2680 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 47,688 psi | 75% | 2635 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 80% | 50,009 psi | 78% | 2612 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 45,179 psi | 71% | 2575 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 33,489 psi | 52% | 2352 fps | 98.7% |
| ADI AR 2218 | 121.7 gr | 86% | 35,273 psi | 55% | 2474 fps | 96% |
| ADI AR 2225 | <<locked>> | 80% | 30,676 psi | 48% | 2333 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 50,285 psi | 79% | 2612 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 50,285 psi | 79% | 2612 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 49,806 psi | 78% | 2605 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 45,803 psi | 72% | 2575 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 44,643 psi | 70% | 2497 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 38,783 psi | 61% | 2467 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 50,879 psi | 80% | 2661 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 82% | 33,388 psi | 52% | 2408 fps | 95.4% |
| Alliant Reloder-50 | <<locked>> | 88% | 35,708 psi | 56% | 2461 fps | 95.8% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 43,134 psi | 68% | 2500 fps | 98.3% |
| Bofors RP15 | <<locked>> | 80% | 42,641 psi | 67% | 2520 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 36,085 psi | 57% | 2425 fps | 99.3% |
| Bofors RP5 | <<locked>> | 80% | 45,803 psi | 72% | 2575 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 36,492 psi | 57% | 2418 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 80% | 47,616 psi | 75% | 2566 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 80% | 46,760 psi | 73% | 2552 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 53,795 psi | 84% | 2559 fps | 100% |
| Hodgdon Retumbo | 106.8 gr | 80% | 37,840 psi | 59% | 2530 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,398 psi | 45% | 1509 fps | 100% |
| Hodgdon US 869 | <<locked>> | 98% | 48,225 psi | 76% | 2628 fps | 95.2% |
| IMR 4955 Enduron | <<locked>> | 80% | 48,399 psi | 76% | 2549 fps | 99.9% |
| IMR 7828 SSC | <<locked>> | 80% | 43,947 psi | 69% | 2562 fps | 99.9% |
| IMR 7977 Enduron | <<locked>> | 84% | 44,092 psi | 69% | 2454 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 80% | 28,224 psi | 44% | 2260 fps | 96.8% |
| Lovex D100 | <<locked>> | 90% | 46,456 psi | 73% | 2543 fps | 95.1% |
| Lovex S071 | <<locked>> | 80% | 39,146 psi | 61% | 2379 fps | 100% |
| Norma 217 | <<locked>> | 80% | 28,369 psi | 44% | 2283 fps | 98.8% |
| Norma MRP | <<locked>> | 80% | 48,878 psi | 77% | 2635 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 44,425 psi | 70% | 2575 fps | 100% |
| Ramshot LRT | <<locked>> | 94% | 47,282 psi | 74% | 2664 fps | 95.1% |
| Ramshot Magnum | <<locked>> | 80% | 39,813 psi | 62% | 2461 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,167 psi | 46% | 1545 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 37,188 psi | 58% | 2510 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 33,968 psi | 53% | 2415 fps | 97.8% |
| Rottweil R 904 | <<locked>> | 80% | 50,575 psi | 79% | 2582 fps | 100% |
| Rottweil R 905 | <<locked>> | 80% | 49,472 psi | 78% | 2595 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 90% | 46,456 psi | 73% | 2543 fps | 95.1% |
| SNPE Vectan SP 13 | <<locked>> | 92% | 36,941 psi | 58% | 2421 fps | 95.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 49,139 psi | 77% | 2592 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 51,474 psi | 81% | 2575 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 49,632 psi | 78% | 2562 fps | 100% |
| Vihtavuori 24N41 | <<locked>> | 96% | 49,211 psi | 77% | 2641 fps | 95.3% |
| Vihtavuori N165 | <<locked>> | 80% | 43,540 psi | 68% | 2461 fps | 100% |
| Vihtavuori N170 | <<locked>> | 82% | 39,682 psi | 62% | 2428 fps | 95.8% |
| Vihtavuori N555 | <<locked>> | 80% | 49,226 psi | 77% | 2562 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 48,472 psi | 76% | 2644 fps | 100% |
| Vihtavuori N565 | <<locked>> | 80% | 40,234 psi | 63% | 2487 fps | 99.5% |
| Vihtavuori N568 | <<locked>> | 80% | 35,288 psi | 55% | 2431 fps | 97.6% |
| Vihtavuori N570 | 113.7 gr | 82% | 36,085 psi | 57% | 2480 fps | 96% |
| Winchester StaBALL HD | <<locked>> | 80% | 43,584 psi | 68% | 2569 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 45,934 psi | 72% | 2513 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 60 powders for .375 Chey Tac loaded with the .375 | 350gr | CutEdge MTH. ADI AR 2218 delivers the highest muzzle velocity at 2,854 fps; across all powders the maximum-charge window runs from 1,686 fps to 2,854 fps. Accurate 8700 gives the best case fill at 100 %, and 60 of the 60 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 350.0 gr projectile in 0.375" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, Alliant Reloder-50, Hodgdon TrailBoss 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, Hodgdon Retumbo rank at the top here: for .375 Chey Tac with the .375 | 350gr | CutEdge MTH 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.