Load Specifications
Load data in caliber .375 Chey Tac with .375 | 390gr | Hornady A-TIP bullet and 47 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ADI AR 2218, Hodgdon H1000 and Ramshot LRT.
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>> | 82% | 54,288 psi | 85% | 2467 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 53,606 psi | 84% | 2598 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 82% | 57,101 psi | 89% | 2635 fps | 100% |
| ADI AR 2213 | <<locked>> | 82% | 53,940 psi | 85% | 2572 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 57,334 psi | 90% | 2608 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 57,725 psi | 90% | 2759 fps | 100% |
| ADI AR 2225 | <<locked>> | 94% | 57,159 psi | 90% | 2631 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 54,607 psi | 86% | 2566 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,623 psi | 89% | 2510 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 57,566 psi | 90% | 2592 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 55,825 psi | 87% | 2677 fps | 100% |
| Alliant Reloder-50 | <<locked>> | 96% | 55,927 psi | 88% | 2680 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 57,464 psi | 90% | 2592 fps | 100% |
| Bofors RP15 | <<locked>> | 84% | 54,128 psi | 85% | 2559 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 57,392 psi | 90% | 2628 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 54,607 psi | 86% | 2566 fps | 100% |
| Hodgdon H1000 | <<locked>> | 88% | 54,795 psi | 86% | 2575 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 56,144 psi | 88% | 2556 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 55,187 psi | 86% | 2543 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 57,566 psi | 90% | 2687 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,159 psi | 60% | 1604 fps | 100% |
| Hodgdon US 869 | <<locked>> | 98% | 54,476 psi | 85% | 2605 fps | 97.8% |
| IMR 4955 Enduron | <<locked>> | 82% | 56,144 psi | 88% | 2530 fps | 100% |
| IMR 7828 SSC | <<locked>> | 84% | 56,405 psi | 88% | 2605 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,839 psi | 86% | 2507 fps | 98.7% |
| IMR 8133 Enduron | <<locked>> | 96% | 56,057 psi | 88% | 2631 fps | 100% |
| Lovex D100 | <<locked>> | 92% | 55,709 psi | 87% | 2562 fps | 98.3% |
| Lovex S071 | <<locked>> | 88% | 56,492 psi | 89% | 2490 fps | 100% |
| Norma 217 | <<locked>> | 96% | 57,682 psi | 90% | 2641 fps | 100% |
| Ramshot Grand | <<locked>> | 82% | 54,027 psi | 85% | 2579 fps | 100% |
| Ramshot LRT | <<locked>> | 96% | 57,276 psi | 90% | 2697 fps | 98.5% |
| Ramshot Magnum | <<locked>> | 86% | 56,217 psi | 88% | 2559 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,291 psi | 62% | 1644 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 53,983 psi | 85% | 2625 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 57,014 psi | 89% | 2667 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 92% | 55,709 psi | 87% | 2562 fps | 98.3% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 55,332 psi | 87% | 2602 fps | 99.9% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 48,689 psi | 76% | 2536 fps | 98.5% |
| Vihtavuori 24N41 | <<locked>> | 96% | 55,288 psi | 87% | 2612 fps | 97.9% |
| Vihtavuori N165 | <<locked>> | 84% | 54,998 psi | 86% | 2490 fps | 100% |
| Vihtavuori N170 | <<locked>> | 88% | 54,143 psi | 85% | 2546 fps | 99.5% |
| Vihtavuori N560 | <<locked>> | 82% | 57,711 psi | 90% | 2635 fps | 100% |
| Vihtavuori N565 | <<locked>> | 86% | 55,448 psi | 87% | 2589 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 57,377 psi | 90% | 2664 fps | 100% |
| Vihtavuori N570 | <<locked>> | 90% | 55,100 psi | 86% | 2684 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 82% | 54,128 psi | 85% | 2559 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 54,447 psi | 85% | 2500 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% | 50,894 psi | 80% | 2425 fps | 100% |
| Accurate 8700 | <<locked>> | 86% | 32,460 psi | 51% | 2234 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 80% | 53,316 psi | 84% | 2582 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 50,357 psi | 79% | 2523 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 37,855 psi | 59% | 2326 fps | 99.9% |
| ADI AR 2218 | 112.9 gr | 80% | 32,387 psi | 51% | 2297 fps | 96.3% |
| ADI AR 2225 | <<locked>> | 80% | 35,157 psi | 55% | 2310 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 51,082 psi | 80% | 2516 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,908 psi | 78% | 2428 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 44,077 psi | 69% | 2415 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 80% | 35,882 psi | 56% | 2346 fps | 97.6% |
| Alliant Reloder-50 | <<locked>> | 80% | 31,270 psi | 49% | 2241 fps | 95.3% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 47,398 psi | 74% | 2448 fps | 99.6% |
| Bofors RP15 | <<locked>> | 80% | 47,630 psi | 75% | 2467 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 41,176 psi | 65% | 2392 fps | 100% |
| Bofors RP5 | <<locked>> | 80% | 51,082 psi | 80% | 2516 fps | 100% |
| Hodgdon H1000 | 107 gr | 80% | 41,263 psi | 65% | 2382 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 52,518 psi | 82% | 2507 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,619 psi | 81% | 2493 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 43,279 psi | 68% | 2493 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,747 psi | 45% | 1437 fps | 100% |
| Hodgdon US 869 | <<locked>> | 92% | 44,208 psi | 69% | 2444 fps | 95.5% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,779 psi | 83% | 2484 fps | 100% |
| IMR 7828 SSC | <<locked>> | 80% | 49,240 psi | 77% | 2510 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 80% | 42,453 psi | 67% | 2313 fps | 96.3% |
| IMR 8133 Enduron | <<locked>> | 80% | 32,866 psi | 52% | 2254 fps | 99.3% |
| Lovex D100 | <<locked>> | 84% | 42,134 psi | 66% | 2352 fps | 95.2% |
| Lovex S071 | <<locked>> | 80% | 44,034 psi | 69% | 2329 fps | 100% |
| Norma 217 | <<locked>> | 80% | 33,388 psi | 52% | 2274 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 50,154 psi | 79% | 2526 fps | 100% |
| Ramshot LRT | 123.9 gr | 88% | 43,221 psi | 68% | 2474 fps | 95.4% |
| Ramshot Magnum | <<locked>> | 80% | 45,208 psi | 71% | 2418 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,588 psi | 46% | 1470 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 42,917 psi | 67% | 2474 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 39,407 psi | 62% | 2402 fps | 99.7% |
| Shooters World 50 BMG | <<locked>> | 84% | 42,134 psi | 66% | 2352 fps | 95.2% |
| SNPE Vectan SP 13 | <<locked>> | 84% | 32,242 psi | 51% | 2205 fps | 95.2% |
| Vihtavuori 20N29 | <<locked>> | 92% | 36,709 psi | 58% | 2323 fps | 95.3% |
| Vihtavuori 24N41 | <<locked>> | 90% | 44,773 psi | 70% | 2451 fps | 95.5% |
| Vihtavuori N165 | <<locked>> | 80% | 48,327 psi | 76% | 2405 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 41,568 psi | 65% | 2346 fps | 97.6% |
| Vihtavuori N560 | <<locked>> | 80% | 54,027 psi | 85% | 2589 fps | 100% |
| Vihtavuori N565 | <<locked>> | 80% | 45,368 psi | 71% | 2448 fps | 100% |
| Vihtavuori N568 | <<locked>> | 80% | 40,422 psi | 63% | 2408 fps | 99.5% |
| Vihtavuori N570 | <<locked>> | 80% | 38,682 psi | 61% | 2411 fps | 98% |
| Winchester StaBALL HD | <<locked>> | 80% | 50,299 psi | 79% | 2513 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,865 psi | 80% | 2454 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 47 powders for .375 Chey Tac loaded with the .375 | 390gr | Hornady A-TIP. ADI AR 2218 delivers the highest muzzle velocity at 2,759 fps; across all powders the maximum-charge window runs from 1,604 fps to 2,759 fps. Accurate 8700 gives the best case fill at 100 %, and 47 of the 47 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 390.0 gr projectile in 0.375" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Accurate 8700, Hodgdon TrailBoss, ReloadSwiss RS 14 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, Hodgdon H1000, Ramshot LRT rank at the top here: for .375 Chey Tac with the .375 | 390gr | Hornady A-TIP 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.