Load Specifications
Load data in caliber .375 Chey Tac with .375 | 325gr | CutEdge LZR bullet and 61 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N570, Hodgdon Retumbo and ReloadSwiss RS 76.
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% | 56,304 psi | 88% | 2720 fps | 100% |
| Accurate 8700ᴾ | <<locked>> | 100% | 43,395 psi | 68% | 2644 fps | 97.3% |
| Accurate High Country | <<locked>> | 84% | 54,520 psi | 85% | 2835 fps | 100% |
| Accurate MAGPRO | <<locked>> | 86% | 55,419 psi | 87% | 2844 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 54,201 psi | 85% | 2762 fps | 100% |
| ADI AR 2213 | <<locked>> | 88% | 56,434 psi | 88% | 2835 fps | 100% |
| ADI AR 2217 | <<locked>> | 96% | 54,955 psi | 86% | 2812 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 55,274 psi | 87% | 2943 fps | 99.8% |
| ADI AR 2225 | <<locked>> | 98% | 53,780 psi | 84% | 2831 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 54,404 psi | 85% | 2759 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 57,348 psi | 90% | 2802 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 88% | 56,739 psi | 89% | 2828 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 88% | 54,868 psi | 86% | 2726 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 92% | 55,027 psi | 86% | 2802 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 84% | 55,201 psi | 87% | 2815 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 56,913 psi | 89% | 2917 fps | 99.8% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 52,098 psi | 82% | 2844 fps | 99.1% |
| Baschieri & Pellagri 109 | <<locked>> | 90% | 56,884 psi | 89% | 2799 fps | 99.7% |
| Bofors RP15 | <<locked>> | 90% | 56,057 psi | 88% | 2815 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 54,766 psi | 86% | 2825 fps | 100% |
| Bofors RP5 | <<locked>> | 88% | 56,739 psi | 89% | 2828 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 56,594 psi | 89% | 2828 fps | 100% |
| Hodgdon H4831 | <<locked>> | 86% | 55,361 psi | 87% | 2769 fps | 100% |
| Hodgdon H4831 SC | <<locked>> | 86% | 54,375 psi | 85% | 2753 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 54,534 psi | 85% | 2661 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 54,259 psi | 85% | 2894 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,710 psi | 59% | 1745 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 56,362 psi | 88% | 2726 fps | 100% |
| IMR 4831 | <<locked>> | 82% | 57,000 psi | 89% | 2723 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 55,825 psi | 87% | 2746 fps | 100% |
| IMR 7828 SSC | <<locked>> | 88% | 54,752 psi | 86% | 2818 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 92% | 54,375 psi | 85% | 2697 fps | 96.9% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 52,591 psi | 82% | 2818 fps | 100% |
| Lovex D100 | <<locked>> | 96% | 54,346 psi | 85% | 2740 fps | 96.1% |
| Lovex S071 | <<locked>> | 92% | 54,462 psi | 85% | 2697 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 53,737 psi | 84% | 2831 fps | 100% |
| Norma MRP | <<locked>> | 86% | 56,797 psi | 89% | 2838 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 55,985 psi | 88% | 2838 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 57,740 psi | 90% | 2779 fps | 100% |
| Ramshot LRTᴾ | <<locked>> | 100% | 54,911 psi | 86% | 2871 fps | 96.1% |
| Ramshot Magnum | <<locked>> | 90% | 54,259 psi | 85% | 2766 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,580 psi | 60% | 1785 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 54,853 psi | 86% | 2881 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 94% | 53,925 psi | 85% | 2854 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 54,737 psi | 86% | 2730 fps | 100% |
| Rottweil R 905 | <<locked>> | 86% | 57,217 psi | 90% | 2795 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 96% | 54,346 psi | 85% | 2740 fps | 96.1% |
| SNPE Vectan SP 13ᴾ | <<locked>> | 100% | 45,440 psi | 71% | 2657 fps | 97.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 56,826 psi | 89% | 2789 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 56,072 psi | 88% | 2723 fps | 100% |
| Somchem S365 | <<locked>> | 82% | 56,405 psi | 88% | 2717 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 57,406 psi | 90% | 2759 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 57,464 psi | 90% | 2746 fps | 100% |
| Vihtavuori N170 | <<locked>> | 94% | 56,391 psi | 88% | 2785 fps | 98.7% |
| Vihtavuori N555 | <<locked>> | 86% | 56,507 psi | 89% | 2753 fps | 100% |
| Vihtavuori N560 | <<locked>> | 86% | 56,275 psi | 88% | 2851 fps | 100% |
| Vihtavuori N565 | <<locked>> | 92% | 56,985 psi | 89% | 2841 fps | 100% |
| Vihtavuori N568 | <<locked>> | 94% | 54,723 psi | 86% | 2858 fps | 100% |
| Vihtavuori N570 | <<locked>> | 96% | 56,014 psi | 88% | 2923 fps | 99.5% |
| Winchester StaBALL HD | <<locked>> | 88% | 54,679 psi | 86% | 2815 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 57,392 psi | 90% | 2762 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% | 42,844 psi | 67% | 2530 fps | 100% |
| Accurate 8700 | <<locked>> | 96% | 37,507 psi | 59% | 2526 fps | 95.3% |
| Accurate High Country | <<locked>> | 80% | 47,340 psi | 74% | 2723 fps | 99.9% |
| Accurate MAGPRO | <<locked>> | 80% | 44,744 psi | 70% | 2674 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 80% | 47,311 psi | 74% | 2657 fps | 100% |
| ADI AR 2213 | <<locked>> | 80% | 42,467 psi | 67% | 2615 fps | 99.5% |
| ADI AR 2217 | <<locked>> | 80% | 31,430 psi | 49% | 2379 fps | 97.2% |
| ADI AR 2218 | <<locked>> | 90% | 38,101 psi | 60% | 2615 fps | 96.1% |
| ADI AR 2225 | <<locked>> | 80% | 28,660 psi | 45% | 2352 fps | 98.9% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 47,645 psi | 75% | 2657 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 47,195 psi | 74% | 2654 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 80% | 43,105 psi | 68% | 2618 fps | 99.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 41,916 psi | 66% | 2546 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 36,158 psi | 57% | 2507 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 80% | 47,456 psi | 74% | 2707 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 86% | 35,926 psi | 56% | 2546 fps | 95.5% |
| Alliant Reloder-50 | <<locked>> | 92% | 38,305 psi | 60% | 2595 fps | 95.9% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 41,089 psi | 64% | 2533 fps | 97.1% |
| Bofors RP15 | <<locked>> | 80% | 40,089 psi | 63% | 2559 fps | 99.7% |
| Bofors RP30 | <<locked>> | 80% | 33,591 psi | 53% | 2451 fps | 98.1% |
| Bofors RP5 | <<locked>> | 80% | 43,105 psi | 68% | 2618 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 80% | 34,214 psi | 54% | 2448 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 80% | 45,034 psi | 71% | 2608 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 44,222 psi | 69% | 2592 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 51,010 psi | 80% | 2615 fps | 100% |
| Hodgdon Retumbo | 106.8 gr | 80% | 35,273 psi | 55% | 2559 fps | 99.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,239 psi | 44% | 1562 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 52,924 psi | 83% | 2680 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 53,432 psi | 84% | 2677 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 46,079 psi | 72% | 2595 fps | 99.6% |
| IMR 7828 SSC | <<locked>> | 80% | 41,191 psi | 65% | 2598 fps | 99.4% |
| IMR 7977 Enduron | <<locked>> | 88% | 47,688 psi | 75% | 2592 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 82% | 28,079 psi | 44% | 2333 fps | 95.8% |
| Lovex D100 | <<locked>> | 94% | 50,589 psi | 79% | 2684 fps | 95.2% |
| Lovex S071 | <<locked>> | 80% | 36,811 psi | 58% | 2421 fps | 100% |
| Norma 217 | <<locked>> | 80% | 26,194 psi | 41% | 2297 fps | 97.2% |
| Norma MRP | <<locked>> | 80% | 45,847 psi | 72% | 2680 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 41,336 psi | 65% | 2612 fps | 99.6% |
| Ramshot Hunter | <<locked>> | 80% | 53,940 psi | 85% | 2733 fps | 100% |
| Ramshot LRT | <<locked>> | 98% | 51,140 psi | 80% | 2808 fps | 95.2% |
| Ramshot Magnum | <<locked>> | 80% | 37,043 psi | 58% | 2493 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,979 psi | 45% | 1601 fps | 100% |
| ReloadSwiss RS 76 | 114.4 gr | 80% | 34,505 psi | 54% | 2533 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 80% | 31,328 psi | 49% | 2428 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 48,080 psi | 75% | 2631 fps | 99.9% |
| Rottweil R 905 | <<locked>> | 80% | 46,760 psi | 73% | 2641 fps | 100% |
| Shooters World 50 BMG | <<locked>> | 94% | 50,589 psi | 79% | 2684 fps | 95.2% |
| SNPE Vectan SP 13 | <<locked>> | 96% | 39,479 psi | 62% | 2549 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 46,412 psi | 73% | 2638 fps | 100% |
| Somchem S361 | <<locked>> | 80% | 48,936 psi | 77% | 2621 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 52,765 psi | 83% | 2671 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 47,007 psi | 74% | 2612 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 41,118 psi | 64% | 2503 fps | 99.9% |
| Vihtavuori N170 | <<locked>> | 84% | 39,958 psi | 63% | 2510 fps | 95% |
| Vihtavuori N555 | <<locked>> | 80% | 46,369 psi | 73% | 2612 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 45,571 psi | 71% | 2684 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 80% | 37,637 psi | 59% | 2516 fps | 98.5% |
| Vihtavuori N568 | <<locked>> | 80% | 32,735 psi | 51% | 2448 fps | 95.8% |
| Vihtavuori N570 | 116.4 gr | 84% | 35,940 psi | 56% | 2556 fps | 95% |
| Winchester StaBALL HD | <<locked>> | 80% | 40,089 psi | 63% | 2608 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 43,381 psi | 68% | 2556 fps | 99.9% |
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 61 powders for .375 Chey Tac loaded with the .375 | 325gr | CutEdge LZR. ADI AR 2218 delivers the highest muzzle velocity at 2,943 fps; across all powders the maximum-charge window runs from 1,745 fps to 2,943 fps. Accurate 8700 gives the best case fill at 100 %, and 61 of the 61 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 325.0 gr projectile in 0.375" calls for a 1:11.0 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. Vihtavuori N570, Hodgdon Retumbo, ReloadSwiss RS 76 rank at the top here: for .375 Chey Tac with the .375 | 325gr | CutEdge LZR 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.