Load Specifications
Load data in caliber .375 Chey Tac with .375 | 250gr | NorthFork Bonded Core bullet and 74 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 High Country.
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% | 56,971 psi | 89% | 3054 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 57,638 psi | 90% | 3087 fps | 100% |
| Accurate High Country | <<locked>> | 88% | 54,679 psi | 86% | 3166 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 90% | 55,796 psi | 87% | 3169 fps | 99.2% |
| ADI AR 2209 | <<locked>> | 88% | 54,795 psi | 86% | 3097 fps | 99.9% |
| ADI AR 2213 | <<locked>> | 92% | 56,637 psi | 89% | 3169 fps | 99.8% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 54,868 psi | 86% | 3123 fps | 99.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 49,356 psi | 77% | 3091 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 54,998 psi | 86% | 3094 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 84% | 54,737 psi | 86% | 3091 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 54,375 psi | 85% | 3087 fps | 99.9% |
| Alliant Reloder-22 | <<locked>> | 92% | 56,942 psi | 89% | 3159 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 92% | 54,621 psi | 86% | 3064 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 96% | 54,346 psi | 85% | 3133 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 88% | 55,158 psi | 86% | 3159 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 52,185 psi | 82% | 3150 fps | 97.5% |
| Baschieri & Pellagri 109 | <<locked>> | 92% | 54,288 psi | 85% | 3061 fps | 97.8% |
| Bofors RP15 | <<locked>> | 94% | 55,970 psi | 88% | 3146 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 54,201 psi | 85% | 3143 fps | 99.8% |
| Bofors RP5 | <<locked>> | 92% | 56,942 psi | 89% | 3159 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 55,506 psi | 87% | 3035 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 56,463 psi | 88% | 3150 fps | 100% |
| Hodgdon H414 | <<locked>> | 82% | 55,332 psi | 87% | 3091 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 57,522 psi | 90% | 3100 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 56,231 psi | 88% | 3097 fps | 99.4% |
| Hodgdon H4831 SC | <<locked>> | 90% | 55,129 psi | 86% | 3081 fps | 99.3% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 55,129 psi | 86% | 3005 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 57,000 psi | 89% | 3274 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 56,072 psi | 88% | 3127 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,304 psi | 58% | 1982 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 57,479 psi | 90% | 3071 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 56,811 psi | 89% | 3054 fps | 100% |
| IMR 4831 | <<locked>> | 84% | 54,201 psi | 85% | 3022 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 56,869 psi | 89% | 3077 fps | 99.5% |
| IMR 7828 SSC | <<locked>> | 92% | 54,592 psi | 86% | 3143 fps | 99.7% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 44,846 psi | 70% | 2999 fps | 98.8% |
| Lovex S065 | <<locked>> | 84% | 57,725 psi | 90% | 3048 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 56,101 psi | 88% | 3051 fps | 100% |
| Lovex S071 | <<locked>> | 96% | 54,665 psi | 86% | 3025 fps | 100% |
| Norma 204 | <<locked>> | 84% | 55,042 psi | 86% | 3081 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 45,281 psi | 71% | 3028 fps | 99.9% |
| Norma MRP | <<locked>> | 90% | 56,913 psi | 89% | 3179 fps | 100% |
| Norma URP | <<locked>> | 84% | 55,767 psi | 87% | 3071 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 55,564 psi | 87% | 3163 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 84% | 54,824 psi | 86% | 3077 fps | 100% |
| Ramshot Magnum | <<locked>> | 94% | 54,230 psi | 85% | 3087 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,159 psi | 60% | 2028 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 53,911 psi | 84% | 3054 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 56,318 psi | 88% | 3140 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 54,143 psi | 85% | 3205 fps | 100% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 53,447 psi | 84% | 3163 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 88% | 55,680 psi | 87% | 3064 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 88% | 53,983 psi | 85% | 3077 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 82% | 55,506 psi | 87% | 3035 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 84% | 57,725 psi | 90% | 3048 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 56,101 psi | 88% | 3051 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 56,898 psi | 89% | 3002 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 57,334 psi | 90% | 3130 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 57,392 psi | 90% | 3051 fps | 99.5% |
| Somchem S365 | <<locked>> | 86% | 56,797 psi | 89% | 3068 fps | 100% |
| Somchem S385 | <<locked>> | 88% | 54,505 psi | 85% | 3045 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 57,493 psi | 90% | 3054 fps | 100% |
| Vihtavuori N165 | <<locked>> | 92% | 54,259 psi | 85% | 3022 fps | 100% |
| Vihtavuori N170 | <<locked>> | 98% | 57,043 psi | 89% | 3087 fps | 96.6% |
| Vihtavuori N550 | <<locked>> | 84% | 56,753 psi | 89% | 3061 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 56,739 psi | 89% | 3094 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 56,492 psi | 89% | 3179 fps | 99.6% |
| Vihtavuori N565 | <<locked>> | 96% | 57,072 psi | 89% | 3163 fps | 99.7% |
| Vihtavuori N568 | <<locked>> | 98% | 54,230 psi | 85% | 3166 fps | 99% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 55,085 psi | 86% | 3228 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 57,246 psi | 90% | 2999 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 55,477 psi | 87% | 3091 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 57,479 psi | 90% | 3209 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 54,389 psi | 85% | 3038 fps | 99.9% |
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% | 37,739 psi | 59% | 2730 fps | 99.3% |
| Accurate 4350 | <<locked>> | 80% | 50,183 psi | 79% | 2979 fps | 100% |
| Accurate High Country | 115.9 gr | 80% | 41,191 psi | 65% | 2913 fps | 97.5% |
| Accurate MAGPRO | <<locked>> | 80% | 38,812 psi | 61% | 2844 fps | 95.5% |
| ADI AR 2209 | <<locked>> | 80% | 41,655 psi | 65% | 2864 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 80% | 37,231 psi | 58% | 2792 fps | 96% |
| ADI AR 2217 | <<locked>> | 86% | 33,982 psi | 53% | 2700 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 84% | 28,834 psi | 45% | 2605 fps | 96% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 42,119 psi | 66% | 2864 fps | 98.5% |
| Alliant Reloder-16 | <<locked>> | 80% | 47,863 psi | 75% | 2986 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 41,727 psi | 65% | 2858 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 37,637 psi | 59% | 2805 fps | 97.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 36,303 psi | 57% | 2756 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 31,444 psi | 49% | 2677 fps | 98.7% |
| Alliant Reloder-26 | <<locked>> | 80% | 40,582 psi | 64% | 2917 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 96% | 44,744 psi | 70% | 3012 fps | 95.6% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 44,904 psi | 70% | 2884 fps | 95.4% |
| Bofors RP15 | <<locked>> | 80% | 34,998 psi | 55% | 2736 fps | 96.6% |
| Bofors RP30 | <<locked>> | 84% | 33,243 psi | 52% | 2720 fps | 95.3% |
| Bofors RP5 | <<locked>> | 80% | 37,637 psi | 59% | 2805 fps | 97.6% |
| Bofors RP7 | <<locked>> | 80% | 52,098 psi | 82% | 2979 fps | 100% |
| Hodgdon H1000 | <<locked>> | 84% | 34,563 psi | 54% | 2720 fps | 96.1% |
| Hodgdon H414 | <<locked>> | 80% | 51,634 psi | 81% | 3035 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 53,896 psi | 84% | 3045 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 80% | 39,827 psi | 62% | 2799 fps | 96.2% |
| Hodgdon H4831 SC | <<locked>> | 80% | 39,044 psi | 61% | 2779 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 45,165 psi | 71% | 2858 fps | 100% |
| Hodgdon Retumbo | 111.6 gr | 80% | 30,676 psi | 48% | 2697 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 52,025 psi | 82% | 3064 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,905 psi | 44% | 1778 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 47,442 psi | 74% | 2913 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 53,403 psi | 84% | 3002 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 47,500 psi | 74% | 2920 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 41,278 psi | 65% | 2795 fps | 96.8% |
| IMR 7828 SSC | <<locked>> | 80% | 35,940 psi | 56% | 2772 fps | 95.6% |
| IMR 8133 Enduron | <<locked>> | 92% | 34,055 psi | 53% | 2756 fps | 95.5% |
| Lovex S065 | <<locked>> | 80% | 50,981 psi | 80% | 2946 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 49,385 psi | 77% | 2946 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 32,460 psi | 51% | 2605 fps | 98.2% |
| Norma 204 | <<locked>> | 80% | 47,848 psi | 75% | 2959 fps | 99.3% |
| Norma 217 | <<locked>> | 88% | 29,805 psi | 47% | 2661 fps | 96% |
| Norma MRP | <<locked>> | 80% | 39,740 psi | 62% | 2877 fps | 99.2% |
| Norma URP | <<locked>> | 80% | 48,863 psi | 77% | 2963 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 35,563 psi | 56% | 2772 fps | 96% |
| Ramshot Hunter | <<locked>> | 80% | 47,790 psi | 75% | 2966 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 31,879 psi | 50% | 2651 fps | 96.5% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,529 psi | 45% | 1818 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 50,241 psi | 79% | 2999 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 48,602 psi | 76% | 3025 fps | 100% |
| ReloadSwiss RS 76 | 119.5 gr | 80% | 29,892 psi | 47% | 2667 fps | 96.5% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 39,189 psi | 61% | 2890 fps | 96.1% |
| Rottweil R 904 | <<locked>> | 80% | 42,946 psi | 67% | 2838 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 80% | 41,162 psi | 65% | 2844 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 80% | 52,098 psi | 82% | 2979 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 50,981 psi | 80% | 2946 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 49,385 psi | 77% | 2946 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 50,009 psi | 78% | 2897 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 40,828 psi | 64% | 2838 fps | 98.4% |
| Somchem S361 | <<locked>> | 80% | 43,845 psi | 69% | 2822 fps | 97.3% |
| Somchem S365 | <<locked>> | 80% | 46,195 psi | 72% | 2913 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 41,713 psi | 65% | 2822 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 80% | 50,314 psi | 79% | 2949 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 36,201 psi | 57% | 2690 fps | 97.6% |
| Vihtavuori N170 | <<locked>> | 96% | 53,229 psi | 83% | 3028 fps | 95.8% |
| Vihtavuori N550 | <<locked>> | 80% | 49,690 psi | 78% | 2956 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 40,698 psi | 64% | 2835 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 39,711 psi | 62% | 2867 fps | 96.4% |
| Vihtavuori N565 | <<locked>> | 82% | 35,056 psi | 55% | 2740 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 90% | 40,466 psi | 63% | 2907 fps | 95.8% |
| Vihtavuori N570 | <<locked>> | 96% | 47,543 psi | 75% | 3091 fps | 96% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 49,748 psi | 78% | 2900 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 51,793 psi | 81% | 3035 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 80% | 32,967 psi | 52% | 2799 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 38,261 psi | 60% | 2746 fps | 97.7% |
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 74 powders for .375 Chey Tac loaded with the .375 | 250gr | NorthFork Bonded Core. Hodgdon Retumbo delivers the highest muzzle velocity at 3,274 fps; across all powders the maximum-charge window runs from 1,982 fps to 3,274 fps. ADI AR 2217 gives the best case fill at 100 %, and 74 of the 74 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 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, 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, ReloadSwiss RS 76, Accurate High Country rank at the top here: for .375 Chey Tac with the .375 | 250gr | NorthFork Bonded Core 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.