Load Specifications
Load data in caliber .375 Chey Tac with .375 | 365gr | SUS-TAC HPT bullet and 59 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>> | 86% | 57,363 psi | 90% | 2579 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 48,225 psi | 76% | 2592 fps | 99.1% |
| Accurate High Country | <<locked>> | 82% | 55,622 psi | 87% | 2690 fps | 100% |
| Accurate MAGPRO | <<locked>> | 84% | 56,478 psi | 89% | 2703 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 54,708 psi | 86% | 2615 fps | 100% |
| ADI AR 2213 | <<locked>> | 86% | 57,188 psi | 90% | 2690 fps | 100% |
| ADI AR 2217 | <<locked>> | 94% | 56,217 psi | 88% | 2674 fps | 100% |
| ADI AR 2218 | <<locked>> | 98% | 56,376 psi | 88% | 2815 fps | 100% |
| ADI AR 2225 | <<locked>> | 96% | 55,390 psi | 87% | 2694 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 54,926 psi | 86% | 2612 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 54,404 psi | 85% | 2608 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 86% | 57,696 psi | 90% | 2680 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 86% | 55,883 psi | 88% | 2582 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 90% | 56,449 psi | 88% | 2661 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 82% | 56,521 psi | 89% | 2671 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 54,346 psi | 85% | 2733 fps | 99.9% |
| Alliant Reloder-50 | <<locked>> | 98% | 54,186 psi | 85% | 2733 fps | 99.8% |
| Baschieri & Pellagri 109 | <<locked>> | 88% | 57,174 psi | 90% | 2657 fps | 100% |
| Bofors RP15 | <<locked>> | 88% | 57,014 psi | 89% | 2674 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 56,217 psi | 88% | 2690 fps | 100% |
| Bofors RP5 | <<locked>> | 86% | 57,696 psi | 90% | 2680 fps | 100% |
| Hodgdon H1000 | <<locked>> | 92% | 57,740 psi | 90% | 2687 fps | 100% |
| Hodgdon H4831 | <<locked>> | 84% | 55,811 psi | 87% | 2625 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 84% | 54,824 psi | 86% | 2612 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 55,825 psi | 87% | 2753 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,985 psi | 60% | 1644 fps | 100% |
| Hodgdon US 869ᴾ | <<locked>> | 100% | 53,156 psi | 83% | 2651 fps | 96.7% |
| IMR 4955 Enduron | <<locked>> | 84% | 56,159 psi | 88% | 2602 fps | 100% |
| IMR 7828 SSC | <<locked>> | 86% | 55,680 psi | 87% | 2677 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 90% | 54,607 psi | 86% | 2566 fps | 98% |
| IMR 8133 Enduron | <<locked>> | 98% | 54,505 psi | 85% | 2690 fps | 100% |
| Lovex D100 | <<locked>> | 94% | 55,085 psi | 86% | 2618 fps | 97.3% |
| Lovex S071 | <<locked>> | 90% | 55,782 psi | 87% | 2559 fps | 100% |
| Norma 217 | <<locked>> | 98% | 55,825 psi | 87% | 2703 fps | 100% |
| Norma MRP | <<locked>> | 82% | 54,012 psi | 85% | 2644 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 57,072 psi | 89% | 2694 fps | 100% |
| Ramshot LRT | <<locked>> | 98% | 55,956 psi | 88% | 2746 fps | 97.5% |
| Ramshot Magnum | <<locked>> | 88% | 55,303 psi | 87% | 2628 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,972 psi | 61% | 1683 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 56,449 psi | 88% | 2740 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 92% | 55,622 psi | 87% | 2726 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 55,143 psi | 86% | 2585 fps | 100% |
| Rottweil R 905 | <<locked>> | 82% | 54,273 psi | 85% | 2598 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 94% | 55,085 psi | 86% | 2618 fps | 97.3% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 50,343 psi | 79% | 2602 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 57,464 psi | 90% | 2641 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 56,289 psi | 88% | 2579 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 54,447 psi | 85% | 2566 fps | 100% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 43,787 psi | 69% | 2520 fps | 96.6% |
| Vihtavuori 24N41 | <<locked>> | 98% | 54,157 psi | 85% | 2661 fps | 96.8% |
| Vihtavuori N165 | <<locked>> | 86% | 54,433 psi | 85% | 2556 fps | 100% |
| Vihtavuori N170 | <<locked>> | 92% | 57,319 psi | 90% | 2657 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 84% | 57,682 psi | 90% | 2605 fps | 100% |
| Vihtavuori N560 | <<locked>> | 84% | 57,188 psi | 90% | 2707 fps | 100% |
| Vihtavuori N565 | <<locked>> | 88% | 54,549 psi | 85% | 2654 fps | 100% |
| Vihtavuori N568 | <<locked>> | 92% | 56,144 psi | 88% | 2726 fps | 100% |
| Vihtavuori N570 | <<locked>> | 94% | 57,479 psi | 90% | 2792 fps | 99.9% |
| Winchester StaBALL HD | <<locked>> | 86% | 56,666 psi | 89% | 2674 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 54,041 psi | 85% | 2569 fps | 100% |
Start Load - Barrel Length: 29"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 47,123 psi | 74% | 2448 fps | 100% |
| Accurate 8700 | <<locked>> | 90% | 33,852 psi | 53% | 2323 fps | 95.2% |
| Accurate High Country | <<locked>> | 80% | 51,909 psi | 81% | 2641 fps | 100% |
| Accurate MAGPRO | <<locked>> | 80% | 49,139 psi | 77% | 2598 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 51,169 psi | 80% | 2566 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 46,441 psi | 73% | 2536 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 34,766 psi | 54% | 2329 fps | 99.2% |
| ADI AR 2218 | <<locked>> | 84% | 34,040 psi | 53% | 2392 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 80% | 32,068 psi | 50% | 2313 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 51,474 psi | 81% | 2566 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 50,981 psi | 80% | 2562 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 47,195 psi | 74% | 2536 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 46,079 psi | 72% | 2457 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 40,161 psi | 63% | 2431 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 52,518 psi | 82% | 2621 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 80% | 32,416 psi | 51% | 2333 fps | 95.3% |
| Alliant Reloder-50 | <<locked>> | 86% | 34,838 psi | 55% | 2392 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 44,193 psi | 69% | 2461 fps | 98.7% |
| Bofors RP15 | <<locked>> | 80% | 44,034 psi | 69% | 2487 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 37,550 psi | 59% | 2398 fps | 99.6% |
| Bofors RP5 | <<locked>> | 80% | 47,195 psi | 74% | 2536 fps | 100% |
| Hodgdon H1000 | <<locked>> | 80% | 37,768 psi | 59% | 2388 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 80% | 48,863 psi | 77% | 2526 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 80% | 48,008 psi | 75% | 2513 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 39,334 psi | 62% | 2500 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,558 psi | 45% | 1470 fps | 100% |
| Hodgdon US 869 | <<locked>> | 98% | 49,603 psi | 78% | 2598 fps | 95.9% |
| IMR 4955 Enduron | <<locked>> | 80% | 49,443 psi | 77% | 2507 fps | 100% |
| IMR 7828 SSC | <<locked>> | 80% | 45,237 psi | 71% | 2526 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 82% | 42,322 psi | 66% | 2369 fps | 95.2% |
| IMR 8133 Enduron | <<locked>> | 80% | 29,689 psi | 47% | 2247 fps | 97.8% |
| Lovex D100 | <<locked>> | 90% | 47,776 psi | 75% | 2510 fps | 95.8% |
| Lovex S071 | <<locked>> | 80% | 40,785 psi | 64% | 2349 fps | 100% |
| Norma 217 | <<locked>> | 80% | 29,936 psi | 47% | 2270 fps | 99.5% |
| Norma MRP | <<locked>> | 80% | 50,372 psi | 79% | 2595 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 45,832 psi | 72% | 2539 fps | 100% |
| Ramshot LRT | <<locked>> | 94% | 48,617 psi | 76% | 2631 fps | 95.8% |
| Ramshot Magnum | <<locked>> | 80% | 41,220 psi | 65% | 2428 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,385 psi | 46% | 1506 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 38,682 psi | 61% | 2480 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 35,578 psi | 56% | 2395 fps | 98.5% |
| Rottweil R 904 | <<locked>> | 80% | 51,663 psi | 81% | 2539 fps | 100% |
| Rottweil R 905 | <<locked>> | 80% | 50,763 psi | 80% | 2552 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 90% | 47,776 psi | 75% | 2510 fps | 95.8% |
| SNPE Vectan SP 13 | <<locked>> | 90% | 35,810 psi | 56% | 2346 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 50,415 psi | 79% | 2549 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 52,663 psi | 83% | 2533 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 51,024 psi | 80% | 2523 fps | 100% |
| Vihtavuori 20N29 | <<locked>> | 98% | 40,756 psi | 64% | 2467 fps | 95.7% |
| Vihtavuori 24N41 | <<locked>> | 94% | 47,094 psi | 74% | 2549 fps | 95.1% |
| Vihtavuori N165 | <<locked>> | 80% | 44,846 psi | 70% | 2425 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 38,363 psi | 60% | 2349 fps | 95.7% |
| Vihtavuori N555 | <<locked>> | 80% | 50,850 psi | 80% | 2520 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 49,864 psi | 78% | 2605 fps | 100% |
| Vihtavuori N565 | <<locked>> | 80% | 41,698 psi | 65% | 2454 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 80% | 36,695 psi | 57% | 2405 fps | 98.3% |
| Vihtavuori N570 | <<locked>> | 80% | 34,911 psi | 55% | 2402 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 80% | 45,397 psi | 71% | 2533 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 47,282 psi | 74% | 2474 fps | 100% |
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 59 powders for .375 Chey Tac loaded with the .375 | 365gr | SUS-TAC HPT. ADI AR 2218 delivers the highest muzzle velocity at 2,815 fps; across all powders the maximum-charge window runs from 1,644 fps to 2,815 fps. Accurate 8700 gives the best case fill at 100 %, and 59 of the 59 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 365.0 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. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.