Load Specifications
Load data in caliber .375 Chey Tac with .375 | 300gr | CutEdge MTH bullet and 70 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, Vihtavuori N570 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>> | 90% | 56,681 psi | 89% | 2825 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 57,130 psi | 90% | 2841 fps | 100% |
| Accurate High Country | <<locked>> | 86% | 54,752 psi | 86% | 2940 fps | 100% |
| Accurate MAGPRO | <<locked>> | 88% | 55,782 psi | 87% | 2946 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 86% | 54,621 psi | 86% | 2867 fps | 100% |
| ADI AR 2213 | <<locked>> | 90% | 56,637 psi | 89% | 2940 fps | 100% |
| ADI AR 2217 | <<locked>> | 98% | 55,071 psi | 86% | 2910 fps | 100% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 51,372 psi | 81% | 2966 fps | 98.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 53,461 psi | 84% | 2930 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 54,795 psi | 86% | 2864 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 82% | 54,868 psi | 86% | 2848 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 54,172 psi | 85% | 2858 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 90% | 56,869 psi | 89% | 2930 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 90% | 54,911 psi | 86% | 2831 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 94% | 54,940 psi | 86% | 2907 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 86% | 55,347 psi | 87% | 2923 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 56,724 psi | 89% | 3012 fps | 99.4% |
| Alliant Reloder-50ᴾ | <<locked>> | 100% | 47,732 psi | 75% | 2864 fps | 97.7% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 57,435 psi | 90% | 2900 fps | 99.3% |
| Bofors RP15 | <<locked>> | 92% | 56,173 psi | 88% | 2920 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 54,549 psi | 85% | 2923 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 56,869 psi | 89% | 2930 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 56,681 psi | 89% | 2930 fps | 100% |
| Hodgdon H4831 | <<locked>> | 88% | 55,898 psi | 88% | 2871 fps | 99.9% |
| Hodgdon H4831 SC | <<locked>> | 88% | 54,926 psi | 86% | 2858 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 84% | 54,853 psi | 86% | 2766 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 94% | 53,766 psi | 84% | 2992 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,507 psi | 59% | 1808 fps | 100% |
| IMR 4350 | <<locked>> | 84% | 57,159 psi | 90% | 2835 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 57,609 psi | 90% | 2835 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 56,550 psi | 89% | 2851 fps | 100% |
| IMR 7828 SSC | <<locked>> | 90% | 54,969 psi | 86% | 2920 fps | 100% |
| IMR 7977 Enduron | <<locked>> | 94% | 54,998 psi | 86% | 2792 fps | 96.1% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 48,602 psi | 76% | 2854 fps | 99.9% |
| Lovex S065 | <<locked>> | 82% | 57,217 psi | 90% | 2808 fps | 100% |
| Lovex S070 | <<locked>> | 82% | 55,492 psi | 87% | 2812 fps | 100% |
| Lovex S071 | <<locked>> | 94% | 54,520 psi | 85% | 2799 fps | 100% |
| Norma 204 | <<locked>> | 82% | 54,650 psi | 86% | 2848 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 49,429 psi | 77% | 2874 fps | 100% |
| Norma MRP | <<locked>> | 88% | 57,072 psi | 89% | 2946 fps | 100% |
| Norma URP | <<locked>> | 82% | 55,463 psi | 87% | 2825 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 56,014 psi | 88% | 2940 fps | 100% |
| Ramshot Hunter | <<locked>> | 82% | 54,534 psi | 85% | 2841 fps | 100% |
| Ramshot Magnum | <<locked>> | 92% | 54,360 psi | 85% | 2867 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,334 psi | 60% | 1850 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 57,479 psi | 90% | 2867 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 56,188 psi | 88% | 2897 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 54,592 psi | 86% | 2982 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 96% | 53,766 psi | 84% | 2949 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 86% | 55,317 psi | 87% | 2835 fps | 100% |
| Rottweil R 905 | <<locked>> | 88% | 57,551 psi | 90% | 2897 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 57,217 psi | 90% | 2808 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 55,492 psi | 87% | 2812 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 56,188 psi | 88% | 2766 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 57,145 psi | 90% | 2897 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 56,811 psi | 89% | 2828 fps | 99.9% |
| Somchem S365 | <<locked>> | 84% | 56,826 psi | 89% | 2825 fps | 100% |
| Somchem S385 | <<locked>> | 86% | 54,172 psi | 85% | 2815 fps | 100% |
| Vihtavuori N160 | <<locked>> | 82% | 57,058 psi | 89% | 2812 fps | 100% |
| Vihtavuori N165 | <<locked>> | 90% | 54,128 psi | 85% | 2802 fps | 100% |
| Vihtavuori N170 | <<locked>> | 96% | 56,811 psi | 89% | 2881 fps | 98.1% |
| Vihtavuori N550 | <<locked>> | 82% | 56,289 psi | 88% | 2822 fps | 100% |
| Vihtavuori N555 | <<locked>> | 88% | 56,652 psi | 89% | 2858 fps | 100% |
| Vihtavuori N560 | <<locked>> | 88% | 56,608 psi | 89% | 2956 fps | 100% |
| Vihtavuori N565 | <<locked>> | 94% | 57,116 psi | 90% | 2940 fps | 100% |
| Vihtavuori N568 | <<locked>> | 96% | 54,607 psi | 86% | 2953 fps | 99.8% |
| Vihtavuori N570 | <<locked>> | 98% | 55,622 psi | 87% | 3015 fps | 99% |
| Winchester 6.5 StaBALL | <<locked>> | 82% | 56,652 psi | 89% | 2762 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 90% | 54,128 psi | 85% | 2920 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 54,056 psi | 85% | 2812 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% | 40,118 psi | 63% | 2572 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 53,388 psi | 84% | 2792 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 44,179 psi | 69% | 2762 fps | 99.3% |
| Accurate MAGPRO | <<locked>> | 80% | 41,713 psi | 65% | 2707 fps | 98% |
| ADI AR 2209 | <<locked>> | 80% | 44,527 psi | 70% | 2707 fps | 99.7% |
| ADI AR 2213 | <<locked>> | 80% | 39,769 psi | 62% | 2651 fps | 98.5% |
| ADI AR 2217 | <<locked>> | 80% | 29,399 psi | 46% | 2398 fps | 95% |
| ADI AR 2218 | <<locked>> | 94% | 41,118 psi | 64% | 2759 fps | 96.1% |
| ADI AR 2225 | <<locked>> | 80% | 26,701 psi | 42% | 2369 fps | 97.1% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 44,904 psi | 70% | 2707 fps | 99.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 51,285 psi | 80% | 2799 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 44,483 psi | 70% | 2700 fps | 99.7% |
| Alliant Reloder-22 | <<locked>> | 80% | 40,306 psi | 63% | 2657 fps | 99.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 39,088 psi | 61% | 2595 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 33,605 psi | 53% | 2539 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 80% | 43,918 psi | 69% | 2753 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 90% | 38,580 psi | 60% | 2690 fps | 95.5% |
| Alliant Reloder-50 | <<locked>> | 96% | 40,785 psi | 64% | 2733 fps | 95.7% |
| Baschieri & Pellagri 109 | <<locked>> | 80% | 39,030 psi | 61% | 2569 fps | 95.4% |
| Bofors RP15 | <<locked>> | 80% | 37,463 psi | 59% | 2595 fps | 98.8% |
| Bofors RP30 | <<locked>> | 80% | 31,024 psi | 49% | 2474 fps | 96.3% |
| Bofors RP5 | <<locked>> | 80% | 40,306 psi | 63% | 2657 fps | 99.4% |
| Hodgdon H1000 | <<locked>> | 80% | 31,981 psi | 50% | 2474 fps | 97% |
| Hodgdon H4831 | <<locked>> | 80% | 42,380 psi | 66% | 2648 fps | 98.4% |
| Hodgdon H4831 SC | <<locked>> | 80% | 41,597 psi | 65% | 2635 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 48,109 psi | 75% | 2674 fps | 100% |
| Hodgdon Retumbo | 106.8 gr | 80% | 32,764 psi | 51% | 2582 fps | 98.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 28,065 psi | 44% | 1621 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 50,241 psi | 79% | 2736 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 50,459 psi | 79% | 2736 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 43,671 psi | 68% | 2641 fps | 98.7% |
| IMR 7828 SSC | <<locked>> | 80% | 38,435 psi | 60% | 2635 fps | 98.2% |
| IMR 7977 Enduron | <<locked>> | 92% | 51,532 psi | 81% | 2740 fps | 95.3% |
| IMR 8133 Enduron | <<locked>> | 86% | 29,820 psi | 47% | 2461 fps | 95.6% |
| Lovex S065 | <<locked>> | 80% | 53,722 psi | 84% | 2762 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 52,083 psi | 82% | 2762 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 34,403 psi | 54% | 2457 fps | 99.6% |
| Norma 204 | <<locked>> | 80% | 50,923 psi | 80% | 2789 fps | 100% |
| Norma 217 | <<locked>> | 82% | 25,947 psi | 41% | 2365 fps | 96% |
| Norma MRP | <<locked>> | 80% | 42,728 psi | 67% | 2723 fps | 100% |
| Norma URP | <<locked>> | 80% | 51,938 psi | 81% | 2779 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 38,319 psi | 60% | 2641 fps | 98.6% |
| Ramshot Hunter | <<locked>> | 80% | 50,908 psi | 80% | 2789 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 34,229 psi | 54% | 2523 fps | 98.9% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,747 psi | 45% | 1660 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 53,577 psi | 84% | 2815 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 52,272 psi | 82% | 2844 fps | 100% |
| ReloadSwiss RS 76 | 114.4 gr | 80% | 31,937 psi | 50% | 2556 fps | 99.2% |
| ReloadSwiss RS 80 | <<locked>> | 84% | 33,591 psi | 53% | 2569 fps | 95.9% |
| Rottweil R 904 | <<locked>> | 80% | 45,498 psi | 71% | 2680 fps | 99.3% |
| Rottweil R 905 | <<locked>> | 80% | 43,932 psi | 69% | 2687 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 80% | 53,722 psi | 84% | 2762 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 52,083 psi | 82% | 2762 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 52,547 psi | 82% | 2717 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 43,598 psi | 68% | 2684 fps | 99.7% |
| Somchem S361 | <<locked>> | 80% | 46,325 psi | 73% | 2667 fps | 99.1% |
| Somchem S365 | <<locked>> | 80% | 49,516 psi | 78% | 2733 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 44,266 psi | 69% | 2661 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 53,476 psi | 84% | 2766 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 38,595 psi | 60% | 2546 fps | 99.3% |
| Vihtavuori N170 | <<locked>> | 90% | 46,050 psi | 72% | 2707 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 52,678 psi | 83% | 2772 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 43,395 psi | 68% | 2664 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 42,583 psi | 67% | 2720 fps | 98.7% |
| Vihtavuori N565 | <<locked>> | 80% | 34,983 psi | 55% | 2543 fps | 97% |
| Vihtavuori N568 | <<locked>> | 84% | 35,027 psi | 55% | 2589 fps | 95.7% |
| Vihtavuori N570 | 124.7 gr | 90% | 41,365 psi | 65% | 2766 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 52,910 psi | 83% | 2717 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 36,506 psi | 57% | 2648 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 40,741 psi | 64% | 2598 fps | 99.4% |
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 70 powders for .375 Chey Tac loaded with the .375 | 300gr | CutEdge MTH. Vihtavuori N570 delivers the highest muzzle velocity at 3,015 fps; across all powders the maximum-charge window runs from 1,808 fps to 3,015 fps. ADI AR 2218 gives the best case fill at 100 %, and 70 of the 70 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 300.0 gr projectile in 0.375" calls for a 1:13.0 twist; slower twists will usually not stabilise this weight. ADI AR 2218, ADI AR 2225, Alliant Reloder-33 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. Hodgdon Retumbo, Vihtavuori N570, ReloadSwiss RS 76 rank at the top here: for .375 Chey Tac with the .375 | 300gr | 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.