Load Specifications
Load data in caliber .375 Chey Tac with .375 | 407gr | Berger VLD Target bullet and 49 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 Alliant Reloder-50.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 29"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 84% | 57,682 psi | 90% | 2448 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 53,026 psi | 83% | 2536 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 82% | 56,797 psi | 89% | 2569 fps | 100% |
| ADI AR 2213 | <<locked>> | 84% | 57,319 psi | 90% | 2552 fps | 100% |
| ADI AR 2217 | <<locked>> | 92% | 56,927 psi | 89% | 2546 fps | 100% |
| ADI AR 2218 | <<locked>> | 96% | 57,305 psi | 90% | 2694 fps | 100% |
| ADI AR 2225 | <<locked>> | 94% | 56,695 psi | 89% | 2569 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 82% | 54,302 psi | 85% | 2500 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 84% | 56,333 psi | 88% | 2448 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 88% | 57,246 psi | 90% | 2526 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 92% | 55,230 psi | 87% | 2612 fps | 100% |
| Alliant Reloder-50 | <<locked>> | 96% | 55,317 psi | 87% | 2615 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 57,159 psi | 90% | 2530 fps | 100% |
| Bofors RP15 | <<locked>> | 86% | 57,377 psi | 90% | 2539 fps | 100% |
| Bofors RP30 | <<locked>> | 90% | 56,942 psi | 89% | 2562 fps | 100% |
| Bofors RP5 | <<locked>> | 82% | 54,302 psi | 85% | 2500 fps | 100% |
| Hodgdon 50BMG | <<locked>> | 96% | 57,421 psi | 90% | 2618 fps | 96.5% |
| Hodgdon H1000 | <<locked>> | 88% | 54,418 psi | 85% | 2510 fps | 100% |
| Hodgdon H4831 | <<locked>> | 82% | 55,796 psi | 87% | 2490 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 82% | 54,955 psi | 86% | 2480 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 57,145 psi | 90% | 2621 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 38,247 psi | 60% | 1562 fps | 100% |
| Hodgdon US 869 | <<locked>> | 98% | 53,969 psi | 85% | 2543 fps | 97.9% |
| IMR 4955 Enduron | <<locked>> | 82% | 55,970 psi | 88% | 2467 fps | 100% |
| IMR 7828 SSC | <<locked>> | 84% | 56,072 psi | 88% | 2543 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 88% | 54,592 psi | 86% | 2448 fps | 98.8% |
| IMR 8133 Enduron | <<locked>> | 96% | 55,593 psi | 87% | 2566 fps | 100% |
| Lovex D100 | <<locked>> | 92% | 55,347 psi | 87% | 2503 fps | 98.4% |
| Lovex S071 | <<locked>> | 88% | 56,231 psi | 88% | 2431 fps | 100% |
| Norma 217 | <<locked>> | 96% | 57,188 psi | 90% | 2579 fps | 100% |
| Ramshot Grand | <<locked>> | 84% | 57,638 psi | 90% | 2562 fps | 100% |
| Ramshot LRT | <<locked>> | 96% | 56,739 psi | 89% | 2631 fps | 98.6% |
| Ramshot Magnum | <<locked>> | 86% | 55,840 psi | 88% | 2497 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 39,305 psi | 62% | 1598 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 57,595 psi | 90% | 2608 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 56,434 psi | 88% | 2602 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 92% | 55,347 psi | 87% | 2503 fps | 98.4% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 54,781 psi | 86% | 2539 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 57,609 psi | 90% | 2507 fps | 100% |
| Vihtavuori 20N29ᴾ | <<locked>> | 100% | 48,167 psi | 75% | 2474 fps | 98.6% |
| Vihtavuori 24N41 | <<locked>> | 96% | 54,752 psi | 86% | 2549 fps | 98% |
| Vihtavuori N165 | <<locked>> | 84% | 54,665 psi | 86% | 2428 fps | 100% |
| Vihtavuori N170 | <<locked>> | 90% | 57,479 psi | 90% | 2533 fps | 99.8% |
| Vihtavuori N560 | <<locked>> | 82% | 57,479 psi | 90% | 2572 fps | 100% |
| Vihtavuori N565 | <<locked>> | 86% | 55,129 psi | 86% | 2526 fps | 100% |
| Vihtavuori N568 | <<locked>> | 90% | 56,927 psi | 89% | 2598 fps | 100% |
| Vihtavuori N570 | <<locked>> | 90% | 54,636 psi | 86% | 2621 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 82% | 53,679 psi | 84% | 2493 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 54,099 psi | 85% | 2438 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% | 50,647 psi | 79% | 2362 fps | 100% |
| Accurate 8700 | <<locked>> | 86% | 32,169 psi | 50% | 2182 fps | 96% |
| Accurate MAGPRO | <<locked>> | 80% | 53,055 psi | 83% | 2520 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 50,125 psi | 79% | 2461 fps | 100% |
| ADI AR 2217 | <<locked>> | 80% | 37,695 psi | 59% | 2270 fps | 100% |
| ADI AR 2218 | 108.6 gr | 80% | 32,140 psi | 50% | 2244 fps | 96.6% |
| ADI AR 2225 | <<locked>> | 80% | 34,925 psi | 55% | 2254 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 50,850 psi | 80% | 2454 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 80% | 49,647 psi | 78% | 2369 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 43,729 psi | 69% | 2356 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 80% | 35,592 psi | 56% | 2293 fps | 97.8% |
| Alliant Reloder-50 | 110.3 gr | 80% | 31,009 psi | 49% | 2192 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 47,152 psi | 74% | 2388 fps | 99.7% |
| Bofors RP15 | <<locked>> | 80% | 47,413 psi | 74% | 2408 fps | 100% |
| Bofors RP30 | <<locked>> | 80% | 40,915 psi | 64% | 2336 fps | 100% |
| Bofors RP5 | <<locked>> | 80% | 50,850 psi | 80% | 2454 fps | 100% |
| Hodgdon 50BMG | <<locked>> | 94% | 53,664 psi | 84% | 2566 fps | 95.7% |
| Hodgdon H1000 | <<locked>> | 80% | 41,046 psi | 64% | 2326 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 52,199 psi | 82% | 2444 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 80% | 51,387 psi | 81% | 2434 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 80% | 43,004 psi | 67% | 2431 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,776 psi | 45% | 1394 fps | 100% |
| Hodgdon US 869 | <<locked>> | 92% | 43,787 psi | 69% | 2388 fps | 95.6% |
| IMR 4955 Enduron | <<locked>> | 80% | 52,518 psi | 82% | 2421 fps | 100% |
| IMR 7828 SSC | <<locked>> | 80% | 48,965 psi | 77% | 2451 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 80% | 42,322 psi | 66% | 2257 fps | 96.5% |
| IMR 8133 Enduron | <<locked>> | 80% | 32,648 psi | 51% | 2201 fps | 99.4% |
| Lovex D100 | <<locked>> | 84% | 41,843 psi | 66% | 2297 fps | 95.4% |
| Lovex S071 | <<locked>> | 80% | 43,772 psi | 69% | 2270 fps | 100% |
| Norma 217 | <<locked>> | 80% | 33,141 psi | 52% | 2221 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 49,879 psi | 78% | 2464 fps | 100% |
| Ramshot LRT | <<locked>> | 88% | 42,844 psi | 67% | 2415 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 80% | 44,904 psi | 70% | 2359 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 29,559 psi | 46% | 1427 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 80% | 42,525 psi | 67% | 2415 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 39,102 psi | 61% | 2346 fps | 99.8% |
| Shooters World 50 BMG | <<locked>> | 84% | 41,843 psi | 66% | 2297 fps | 95.4% |
| SNPE Vectan SP 13 | <<locked>> | 84% | 31,981 psi | 50% | 2152 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 54,012 psi | 85% | 2464 fps | 100% |
| Vihtavuori 20N29 | <<locked>> | 92% | 36,434 psi | 57% | 2274 fps | 95.5% |
| Vihtavuori 24N41 | <<locked>> | 90% | 44,425 psi | 70% | 2392 fps | 95.7% |
| Vihtavuori N165 | <<locked>> | 80% | 48,051 psi | 75% | 2346 fps | 100% |
| Vihtavuori N170 | <<locked>> | 80% | 41,292 psi | 65% | 2290 fps | 97.8% |
| Vihtavuori N560 | <<locked>> | 80% | 53,650 psi | 84% | 2523 fps | 100% |
| Vihtavuori N565 | <<locked>> | 80% | 45,078 psi | 71% | 2385 fps | 100% |
| Vihtavuori N568 | <<locked>> | 80% | 40,219 psi | 63% | 2352 fps | 99.6% |
| Vihtavuori N570 | 106.4 gr | 80% | 38,348 psi | 60% | 2356 fps | 98.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 49,980 psi | 78% | 2451 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 50,589 psi | 79% | 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 49 powders for .375 Chey Tac loaded with the .375 | 407gr | Berger VLD Target. ADI AR 2218 delivers the highest muzzle velocity at 2,694 fps; across all powders the maximum-charge window runs from 1,562 fps to 2,694 fps. Accurate 8700 gives the best case fill at 100 %, and 49 of the 49 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 407.0 gr projectile in 0.375" calls for a 1:9.5 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, Vihtavuori N570, Alliant Reloder-50 rank at the top here: for .375 Chey Tac with the .375 | 407gr | Berger VLD Target 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.