Load Specifications
Load data in caliber .375 Chey Tac with .376 | 250gr | Peregrine VRG-3 bullet and 73 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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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>> | 92% | 55,941 psi | 88% | 3048 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 56,594 psi | 89% | 3081 fps | 100% |
| Accurate MAGPRO | <<locked>> | 90% | 54,940 psi | 86% | 3163 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 88% | 54,099 psi | 85% | 3094 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 56,014 psi | 88% | 3163 fps | 99.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,244 psi | 85% | 3120 fps | 99.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 48,588 psi | 76% | 3081 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,128 psi | 85% | 3087 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 57,450 psi | 90% | 3140 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,202 psi | 88% | 3156 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 94% | 57,595 psi | 90% | 3110 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 57,537 psi | 90% | 3182 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 54,230 psi | 85% | 3150 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 51,256 psi | 80% | 3140 fps | 97.4% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 57,363 psi | 90% | 3117 fps | 98.4% |
| Bofors RP15 | <<locked>> | 94% | 55,332 psi | 87% | 3143 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 57,305 psi | 90% | 3196 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 56,202 psi | 88% | 3156 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 54,824 psi | 86% | 3028 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 55,796 psi | 87% | 3146 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 54,592 psi | 86% | 3087 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 56,942 psi | 89% | 3097 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 55,608 psi | 87% | 3094 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 54,520 psi | 85% | 3077 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 54,389 psi | 85% | 3002 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 56,376 psi | 88% | 3271 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 55,434 psi | 87% | 3123 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,101 psi | 58% | 1982 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 56,855 psi | 89% | 3071 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,246 psi | 88% | 3054 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 57,043 psi | 89% | 3071 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,318 psi | 88% | 3074 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 92% | 53,925 psi | 85% | 3136 fps | 99.6% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 43,903 psi | 69% | 2989 fps | 98.7% |
| Lovex S065 | <<locked>> | 84% | 56,956 psi | 89% | 3045 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 55,303 psi | 87% | 3048 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 57,174 psi | 90% | 3064 fps | 100% |
| Norma 204 | <<locked>> | 84% | 54,317 psi | 85% | 3074 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 44,266 psi | 69% | 3012 fps | 99.9% |
| Norma MRP | <<locked>> | 90% | 56,217 psi | 88% | 3176 fps | 100% |
| Norma URP | <<locked>> | 84% | 55,013 psi | 86% | 3064 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 54,926 psi | 86% | 3159 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 84% | 54,070 psi | 85% | 3071 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 53,461 psi | 84% | 3081 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,913 psi | 59% | 2028 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 57,000 psi | 89% | 3104 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 55,680 psi | 87% | 3136 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 57,725 psi | 90% | 3264 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 57,000 psi | 89% | 3222 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 88% | 54,984 psi | 86% | 3061 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 90% | 56,927 psi | 89% | 3127 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 54,824 psi | 86% | 3028 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 56,956 psi | 89% | 3045 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 55,303 psi | 87% | 3048 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,144 psi | 88% | 2995 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 56,492 psi | 89% | 3123 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 56,710 psi | 89% | 3048 fps | 99.4% |
| Somchem S365 | <<locked>> | 86% | 55,912 psi | 88% | 3061 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 57,450 psi | 90% | 3094 fps | 100% |
| Vihtavuori N150 | <<locked>> | 82% | 57,000 psi | 89% | 2979 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 56,768 psi | 89% | 3051 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 57,276 psi | 90% | 3071 fps | 100% |
| Vihtavuori N170 | <<locked>> | 98% | 56,217 psi | 88% | 3084 fps | 96.6% |
| Vihtavuori N550 | <<locked>> | 84% | 55,898 psi | 88% | 3058 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 55,680 psi | 87% | 3087 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 55,898 psi | 88% | 3176 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 96% | 56,072 psi | 88% | 3153 fps | 99.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 57,522 psi | 90% | 3222 fps | 99.4% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 54,418 psi | 85% | 3222 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 56,507 psi | 89% | 2999 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 54,723 psi | 86% | 3087 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 56,768 psi | 89% | 3202 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 57,551 psi | 90% | 3091 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% | 36,637 psi | 57% | 2713 fps | 99.2% |
| Accurate 4350 | <<locked>> | 80% | 49,153 psi | 77% | 2969 fps | 100% |
| Accurate MAGPRO | 119 gr | 80% | 38,000 psi | 60% | 2831 fps | 95.2% |
| ADI AR 2209 | <<locked>> | 80% | 41,002 psi | 64% | 2858 fps | 98.3% |
| ADI AR 2213 | <<locked>> | 80% | 36,535 psi | 57% | 2782 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 88% | 35,621 psi | 56% | 2749 fps | 95.9% |
| ADI AR 2225 | <<locked>> | 84% | 27,963 psi | 44% | 2582 fps | 95.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,253 psi | 74% | 2982 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,017 psi | 64% | 2848 fps | 98.3% |
| Alliant Reloder-22 | <<locked>> | 80% | 36,811 psi | 58% | 2792 fps | 97.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 35,476 psi | 56% | 2746 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 30,603 psi | 48% | 2661 fps | 98.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 39,595 psi | 62% | 2900 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 43,961 psi | 69% | 2999 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 44,353 psi | 70% | 2881 fps | 95.3% |
| Bofors RP15 | <<locked>> | 80% | 34,185 psi | 54% | 2726 fps | 96.3% |
| Bofors RP30 | <<locked>> | 86% | 34,751 psi | 54% | 2766 fps | 96% |
| Bofors RP5 | <<locked>> | 80% | 36,811 psi | 58% | 2792 fps | 97.4% |
| Bofors RP7 | <<locked>> | 80% | 51,314 psi | 80% | 2976 fps | 99.9% |
| Hodgdon H1000 | <<locked>> | 84% | 33,765 psi | 53% | 2703 fps | 95.8% |
| Hodgdon H414 | <<locked>> | 80% | 50,952 psi | 80% | 3028 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 53,316 psi | 84% | 3041 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 80% | 39,001 psi | 61% | 2785 fps | 96% |
| Hodgdon H4831 SC | <<locked>> | 80% | 38,334 psi | 60% | 2772 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 44,411 psi | 70% | 2851 fps | 100% |
| Hodgdon Retumbo | 112.5 gr | 80% | 29,849 psi | 47% | 2680 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 51,343 psi | 80% | 3058 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,760 psi | 44% | 1778 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 46,818 psi | 73% | 2907 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 52,866 psi | 83% | 3002 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 46,673 psi | 73% | 2913 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 40,640 psi | 64% | 2789 fps | 96.7% |
| IMR 7828 SSC | <<locked>> | 80% | 35,172 psi | 55% | 2759 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 92% | 33,141 psi | 52% | 2740 fps | 95.2% |
| Lovex S065 | <<locked>> | 80% | 50,227 psi | 79% | 2943 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 48,602 psi | 76% | 2940 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 31,299 psi | 49% | 2582 fps | 97.8% |
| Norma 204 | <<locked>> | 80% | 47,166 psi | 74% | 2953 fps | 99.3% |
| Norma 217 | <<locked>> | 88% | 28,776 psi | 45% | 2635 fps | 95.5% |
| Norma MRP | <<locked>> | 80% | 38,870 psi | 61% | 2864 fps | 99% |
| Norma URP | <<locked>> | 80% | 48,153 psi | 75% | 2959 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 34,751 psi | 54% | 2759 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 47,079 psi | 74% | 2959 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 30,966 psi | 49% | 2635 fps | 96.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,355 psi | 44% | 1821 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 49,501 psi | 78% | 2992 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 47,892 psi | 75% | 3018 fps | 100% |
| ReloadSwiss RS 76 | 120.4 gr | 80% | 28,964 psi | 45% | 2644 fps | 96% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 38,276 psi | 60% | 2874 fps | 95.8% |
| Rottweil R 904 | <<locked>> | 80% | 42,163 psi | 66% | 2831 fps | 97.6% |
| Rottweil R 905 | <<locked>> | 80% | 40,277 psi | 63% | 2831 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 80% | 51,314 psi | 80% | 2976 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,227 psi | 79% | 2943 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 48,602 psi | 76% | 2940 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 49,124 psi | 77% | 2890 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 39,958 psi | 63% | 2828 fps | 98.2% |
| Somchem S361 | <<locked>> | 80% | 43,062 psi | 67% | 2815 fps | 97.2% |
| Somchem S365 | <<locked>> | 80% | 45,353 psi | 71% | 2907 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 40,828 psi | 64% | 2812 fps | 99% |
| Vihtavuori N150 | <<locked>> | 80% | 53,490 psi | 84% | 2930 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 49,588 psi | 78% | 2946 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 35,418 psi | 56% | 2680 fps | 97.4% |
| Vihtavuori N170 | <<locked>> | 96% | 52,431 psi | 82% | 3022 fps | 95.7% |
| Vihtavuori N550 | <<locked>> | 80% | 48,892 psi | 77% | 2953 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 39,610 psi | 62% | 2822 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 38,914 psi | 61% | 2854 fps | 96.2% |
| Vihtavuori N565 | <<locked>> | 84% | 36,622 psi | 57% | 2782 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 90% | 39,537 psi | 62% | 2894 fps | 95.5% |
| Vihtavuori N570 | <<locked>> | 96% | 46,746 psi | 73% | 3081 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,052 psi | 77% | 2897 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,053 psi | 80% | 3028 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,039 psi | 50% | 2779 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 37,478 psi | 59% | 2733 fps | 97.5% |
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 79 powders for .375 Chey Tac loaded with the .376 | 250gr | Peregrine VRG-3. Hodgdon Retumbo delivers the highest muzzle velocity at 3,271 fps; across all powders the maximum-charge window runs from 1,982 fps to 3,271 fps. ADI AR 2217 gives the best case fill at 100 %, and 79 of the 79 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 250.0 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 | 250gr | Peregrine VRG-3 they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-50, IMR 7977 Enduron, Lovex D100 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.