Load Specifications
Load data in caliber .375 Chey Tac with .376 | 270gr | Peregrine Bushmaster (VRG-3) bullet and 76 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Accurate MAGPRO.
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>> | 92% | 56,173 psi | 88% | 2949 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,956 psi | 89% | 2979 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 54,288 psi | 85% | 3064 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 90% | 55,230 psi | 87% | 3068 fps | 99.5% |
| ADI AR 2209 | <<locked>> | 88% | 54,447 psi | 85% | 2995 fps | 100% |
| ADI AR 2213 | <<locked>> | 92% | 56,391 psi | 88% | 3068 fps | 99.9% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,505 psi | 85% | 3028 fps | 99.9% |
| ADI AR 2218ᴾ | <<locked>> | 100% | 47,166 psi | 74% | 2995 fps | 96.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,950 psi | 77% | 2992 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 54,737 psi | 86% | 2995 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,563 psi | 86% | 2986 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 54,099 psi | 85% | 2986 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,521 psi | 89% | 3058 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 54,288 psi | 85% | 2963 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 54,012 psi | 85% | 3031 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 54,607 psi | 86% | 3051 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 51,547 psi | 81% | 3054 fps | 97.9% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,551 psi | 90% | 3022 fps | 98.7% |
| Bofors RP15 | <<locked>> | 94% | 55,550 psi | 87% | 3041 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 57,508 psi | 90% | 3097 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 56,521 psi | 89% | 3058 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 55,114 psi | 86% | 2930 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 56,101 psi | 88% | 3051 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 54,955 psi | 86% | 2986 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,319 psi | 90% | 2995 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 55,811 psi | 87% | 2995 fps | 99.6% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,839 psi | 86% | 2982 fps | 99.5% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,766 psi | 86% | 2900 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,797 psi | 89% | 3173 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 55,753 psi | 87% | 3022 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,231 psi | 58% | 1896 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,276 psi | 90% | 2969 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,594 psi | 89% | 2953 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,493 psi | 90% | 2969 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,623 psi | 89% | 2979 fps | 99.7% |
| IMR 7828 SSC | <<locked>> | 92% | 54,404 psi | 85% | 3045 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 44,208 psi | 69% | 2904 fps | 99.1% |
| Lovex S065 | <<locked>> | 84% | 57,392 psi | 90% | 2943 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,680 psi | 87% | 2946 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,493 psi | 90% | 2966 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,708 psi | 86% | 2976 fps | 100% |
| Norma 217ᴾ | <<locked>> | 100% | 44,643 psi | 70% | 2927 fps | 100% |
| Norma MRP | <<locked>> | 90% | 56,550 psi | 89% | 3077 fps | 100% |
| Norma URP | <<locked>> | 84% | 55,405 psi | 87% | 2963 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 55,259 psi | 87% | 3061 fps | 100% |
| Ramshot Hunter | <<locked>> | 84% | 54,447 psi | 85% | 2972 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 53,751 psi | 84% | 2989 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,000 psi | 60% | 1942 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,348 psi | 90% | 3002 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 56,057 psi | 88% | 3038 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 53,548 psi | 84% | 3104 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 57,276 psi | 90% | 3130 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 88% | 55,376 psi | 87% | 2963 fps | 99.8% |
| Rottweil R 905 | <<locked>> | 90% | 57,261 psi | 90% | 3028 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 55,114 psi | 86% | 2930 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,392 psi | 90% | 2943 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,680 psi | 87% | 2946 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,594 psi | 89% | 2900 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,840 psi | 89% | 3025 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 57,058 psi | 89% | 2953 fps | 99.6% |
| Somchem S365 | <<locked>> | 86% | 56,391 psi | 88% | 2959 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 54,012 psi | 85% | 2943 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 57,508 psi | 90% | 2877 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,087 psi | 89% | 2949 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,537 psi | 90% | 2972 fps | 100% |
| Vihtavuori N170 | <<locked>> | 98% | 56,434 psi | 88% | 2992 fps | 97.1% |
| Vihtavuori N550 | <<locked>> | 84% | 56,362 psi | 88% | 2959 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 56,101 psi | 88% | 2989 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 56,202 psi | 88% | 3081 fps | 99.8% |
| Vihtavuori N565 | <<locked>> | 96% | 56,434 psi | 88% | 3061 fps | 99.9% |
| Vihtavuori N568 | <<locked>> | 98% | 53,708 psi | 84% | 3068 fps | 99.2% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 54,563 psi | 86% | 3127 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,898 psi | 89% | 2900 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 55,071 psi | 86% | 2986 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 57,072 psi | 89% | 3100 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 53,925 psi | 85% | 2940 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% | 36,999 psi | 58% | 2631 fps | 99.5% |
| Accurate 4350 | <<locked>> | 80% | 49,588 psi | 78% | 2874 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 40,582 psi | 64% | 2812 fps | 97.9% |
| Accurate MAGPRO | 113.7 gr | 80% | 38,261 psi | 60% | 2749 fps | 96% |
| ADI AR 2209 | <<locked>> | 80% | 41,350 psi | 65% | 2769 fps | 98.8% |
| ADI AR 2213 | <<locked>> | 80% | 36,811 psi | 58% | 2700 fps | 96.5% |
| ADI AR 2217 | <<locked>> | 86% | 33,489 psi | 52% | 2612 fps | 95.6% |
| ADI AR 2218 | <<locked>> | 98% | 43,859 psi | 69% | 2923 fps | 95.5% |
| ADI AR 2225 | <<locked>> | 82% | 26,411 psi | 41% | 2454 fps | 95.3% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 41,771 psi | 65% | 2769 fps | 98.8% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,659 psi | 75% | 2884 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,379 psi | 65% | 2762 fps | 98.8% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,130 psi | 58% | 2710 fps | 98% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,868 psi | 56% | 2661 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,922 psi | 48% | 2585 fps | 99% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,943 psi | 63% | 2815 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 94% | 40,901 psi | 64% | 2851 fps | 95% |
| Baschieri & Pellagri 109 | <<locked>> | 84% | 41,814 psi | 66% | 2736 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 34,490 psi | 54% | 2644 fps | 97% |
| Bofors RP30 | <<locked>> | 84% | 32,576 psi | 51% | 2625 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 37,130 psi | 58% | 2710 fps | 98% |
| Bofors RP7 | <<locked>> | 80% | 51,677 psi | 81% | 2877 fps | 100% |
| Hodgdon H1000 | <<locked>> | 82% | 31,720 psi | 50% | 2566 fps | 95.5% |
| Hodgdon H414 | <<locked>> | 80% | 51,372 psi | 81% | 2933 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 53,635 psi | 84% | 2943 fps | 100% |
| Hodgdon H4831 | <<locked>> | 80% | 39,320 psi | 62% | 2703 fps | 96.7% |
| Hodgdon H4831 SC | <<locked>> | 80% | 38,624 psi | 61% | 2687 fps | 96.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,773 psi | 70% | 2756 fps | 100% |
| Hodgdon Retumbo | 107.6 gr | 80% | 30,168 psi | 47% | 2608 fps | 96.1% |
| Hodgdon Superformance | <<locked>> | 80% | 51,648 psi | 81% | 2963 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,775 psi | 44% | 1699 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,137 psi | 74% | 2815 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,156 psi | 83% | 2900 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 47,036 psi | 74% | 2818 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,930 psi | 64% | 2703 fps | 97.3% |
| IMR 7828 SSC | <<locked>> | 80% | 35,447 psi | 56% | 2677 fps | 96.1% |
| IMR 8133 Enduron | <<locked>> | 92% | 33,446 psi | 52% | 2664 fps | 96% |
| Lovex S065 | <<locked>> | 80% | 50,604 psi | 79% | 2848 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,892 psi | 77% | 2841 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 31,676 psi | 50% | 2510 fps | 98.4% |
| Norma 204 | <<locked>> | 80% | 47,601 psi | 75% | 2864 fps | 99.5% |
| Norma 217 | <<locked>> | 86% | 27,137 psi | 43% | 2507 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 39,160 psi | 61% | 2779 fps | 99.4% |
| Norma URP | <<locked>> | 80% | 48,472 psi | 76% | 2861 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 35,070 psi | 55% | 2680 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 80% | 47,514 psi | 74% | 2867 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 31,227 psi | 49% | 2559 fps | 97% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,413 psi | 45% | 1742 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,806 psi | 78% | 2897 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,298 psi | 76% | 2923 fps | 100% |
| ReloadSwiss RS 76 | 115.1 gr | 80% | 29,196 psi | 46% | 2575 fps | 97% |
| ReloadSwiss RS 80 | <<locked>> | 88% | 35,650 psi | 56% | 2730 fps | 95.4% |
| Rottweil R 904 | <<locked>> | 80% | 42,554 psi | 67% | 2743 fps | 98.1% |
| Rottweil R 905 | <<locked>> | 80% | 40,712 psi | 64% | 2749 fps | 98.8% |
| Rottweil R 907 | <<locked>> | 80% | 51,677 psi | 81% | 2877 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,604 psi | 79% | 2848 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,892 psi | 77% | 2841 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,487 psi | 78% | 2795 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,393 psi | 63% | 2743 fps | 98.7% |
| Somchem S361 | <<locked>> | 80% | 43,410 psi | 68% | 2726 fps | 97.7% |
| Somchem S365 | <<locked>> | 80% | 45,759 psi | 72% | 2812 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,118 psi | 64% | 2723 fps | 99.3% |
| Vihtavuori N150 | <<locked>> | 80% | 53,795 psi | 84% | 2831 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,995 psi | 78% | 2851 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,723 psi | 56% | 2598 fps | 98% |
| Vihtavuori N170 | <<locked>> | 94% | 49,153 psi | 77% | 2874 fps | 95.4% |
| Vihtavuori N550 | <<locked>> | 80% | 49,284 psi | 77% | 2858 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,016 psi | 63% | 2733 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 39,189 psi | 61% | 2769 fps | 96.9% |
| Vihtavuori N565 | <<locked>> | 82% | 34,330 psi | 54% | 2641 fps | 95.5% |
| Vihtavuori N568 | <<locked>> | 88% | 36,970 psi | 58% | 2746 fps | 95.2% |
| Vihtavuori N570 | <<locked>> | 94% | 43,714 psi | 69% | 2930 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,356 psi | 77% | 2802 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,474 psi | 81% | 2933 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,561 psi | 51% | 2700 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,724 psi | 59% | 2651 fps | 98% |
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 76 powders for .375 Chey Tac loaded with the .376 | 270gr | Peregrine Bushmaster (VRG-3). Hodgdon Retumbo delivers the highest muzzle velocity at 3,173 fps; across all powders the maximum-charge window runs from 1,896 fps to 3,173 fps. ADI AR 2217 gives the best case fill at 100 %, and 76 of the 76 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 270.0 gr projectile in 0.376" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2218, ADI AR 2225 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, ReloadSwiss RS 76, Accurate MAGPRO rank at the top here: for .375 Chey Tac with the .376 | 270gr | Peregrine Bushmaster (VRG-3) 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.