Load Specifications
Bullet:.375 | 250gr | Hornady GMX
Bullet Manufacturer:Hornady
Bullet Weight:250 gr
Bullet Diameter:0.375"
Bullet Length:<<locked>>
Caliber:37 XC load data
Case Length (l3):3.087"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:139.8 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:30"
Max. allowed Pressure:69,618 psi
Recommended Twist Rate:1:14.5
Load data in caliber 37 XC with .375 | 250gr | Hornady GMX bullet and 124 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Alliant Reloder-17 and ReloadSwiss RS 60.
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.
A valid access license is required to use the Personalized Load Calculator.
You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 30"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 82% | 59,509 psi | 85% | 2930 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 59,248 psi | 85% | 2966 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 60,988 psi | 88% | 3041 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 61,627 psi | 89% | 3061 fps | 99.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,894 psi | 73% | 2986 fps | 99.8% |
| Accurate 4064 | <<locked>> | 88% | 59,567 psi | 86% | 3025 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 61,192 psi | 88% | 3153 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 56,159 psi | 81% | 3209 fps | 98.7% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 53,258 psi | 77% | 3140 fps | 97.1% |
| ADI APS 450 | <<locked>> | 84% | 62,337 psi | 90% | 2362 fps | 100% |
| ADI AR 2206H | <<locked>> | 86% | 62,903 psi | 90% | 3120 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 60,365 psi | 87% | 3071 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 58,436 psi | 84% | 3153 fps | 99.3% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 52,417 psi | 75% | 3087 fps | 97.7% |
| ADI Benchmark 8208 | <<locked>> | 84% | 61,496 psi | 88% | 3058 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 59,553 psi | 86% | 2963 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 60,350 psi | 87% | 3215 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 58,436 psi | 84% | 3146 fps | 99.4% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 58,436 psi | 84% | 3146 fps | 99.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 60,988 psi | 88% | 3091 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 61,482 psi | 88% | 3120 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 98% | 61,873 psi | 89% | 3209 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 59,669 psi | 86% | 3182 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 57,551 psi | 83% | 3136 fps | 99.3% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,981 psi | 73% | 3084 fps | 98.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,008 psi | 69% | 3012 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,771 psi | 60% | 2940 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 55,419 psi | 80% | 3215 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 59,495 psi | 85% | 3094 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 46,586 psi | 67% | 3005 fps | 97.8% |
| Bofors RP3 | <<locked>> | 90% | 62,308 psi | 90% | 3110 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,981 psi | 73% | 3084 fps | 98.7% |
| Bofors RP7 | <<locked>> | 94% | 61,496 psi | 88% | 3104 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 84% | 62,656 psi | 90% | 3028 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 61,888 psi | 89% | 3094 fps | 100% |
| Hodgdon H380 | <<locked>> | 90% | 62,816 psi | 90% | 3136 fps | 100% |
| Hodgdon H414 | <<locked>> | 94% | 59,712 psi | 86% | 3159 fps | 100% |
| Hodgdon H4350 | <<locked>> | 92% | 59,524 psi | 86% | 3117 fps | 99.5% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 56,304 psi | 81% | 3087 fps | 97.7% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 55,042 psi | 79% | 3068 fps | 97.5% |
| Hodgdon H4895 | <<locked>> | 84% | 59,785 psi | 86% | 3077 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 62,236 psi | 89% | 3114 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 60,263 psi | 87% | 3114 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 40,886 psi | 59% | 2966 fps | 97.2% |
| Hodgdon Superformance | <<locked>> | 94% | 60,640 psi | 87% | 3205 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,085 psi | 52% | 1873 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 60,974 psi | 88% | 3077 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 60,437 psi | 87% | 3041 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 59,770 psi | 86% | 3051 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 88% | 62,975 psi | 90% | 3097 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 62,627 psi | 90% | 3136 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 92% | 59,538 psi | 86% | 3081 fps | 99.9% |
| IMR 4831 | <<locked>> | 98% | 61,467 psi | 88% | 3136 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 59,146 psi | 85% | 3097 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 57,827 psi | 83% | 3074 fps | 98% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 49,777 psi | 72% | 3058 fps | 97.3% |
| IMR 8208 XBR | <<locked>> | 84% | 61,496 psi | 88% | 3058 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 59,524 psi | 86% | 3031 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 61,453 psi | 88% | 3031 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 59,712 psi | 86% | 3038 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 59,234 psi | 85% | 3068 fps | 100% |
| Lovex S070 | <<locked>> | 96% | 60,829 psi | 87% | 3114 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,974 psi | 60% | 2835 fps | 98.9% |
| Norma 201 | <<locked>> | 86% | 61,221 psi | 88% | 3051 fps | 100% |
| Norma 202 | <<locked>> | 86% | 62,149 psi | 89% | 3045 fps | 100% |
| Norma 203B | <<locked>> | 88% | 60,713 psi | 87% | 3104 fps | 100% |
| Norma 204 | <<locked>> | 96% | 60,060 psi | 86% | 3146 fps | 99.4% |
| Norma MRPᴾ | <<locked>> | 100% | 54,215 psi | 78% | 3173 fps | 99.8% |
| Norma URP | <<locked>> | 96% | 59,654 psi | 86% | 3136 fps | 100% |
| Ramshot Big Game | <<locked>> | 88% | 62,221 psi | 89% | 3136 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 49,792 psi | 72% | 3064 fps | 97.6% |
| Ramshot Hunter | <<locked>> | 98% | 62,569 psi | 90% | 3199 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 44,338 psi | 64% | 2936 fps | 98.1% |
| Ramshot TAC | <<locked>> | 84% | 61,844 psi | 89% | 3097 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 84% | 62,149 psi | 89% | 3107 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 82% | 62,250 psi | 89% | 3061 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,666 psi | 53% | 1916 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 62,816 psi | 90% | 3120 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 58,900 psi | 85% | 3143 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 59,263 psi | 85% | 3173 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 61,163 psi | 88% | 3179 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 59,901 psi | 86% | 3215 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 40,712 psi | 58% | 2959 fps | 98.2% |
| Rottweil R 901 | <<locked>> | 84% | 61,554 psi | 88% | 3015 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 61,902 psi | 89% | 3051 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 62,105 psi | 89% | 3100 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 60,278 psi | 87% | 3117 fps | 98.8% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 56,710 psi | 81% | 3123 fps | 99.3% |
| Rottweil R 907 | <<locked>> | 94% | 61,496 psi | 88% | 3104 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 94% | 59,234 psi | 85% | 3068 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 84% | 59,524 psi | 86% | 3031 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 59,712 psi | 86% | 3038 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 60,829 psi | 87% | 3114 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 60,292 psi | 87% | 3120 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 60,829 psi | 87% | 3077 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 61,366 psi | 88% | 3087 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 62,352 psi | 90% | 2969 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 59,611 psi | 86% | 2923 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 59,509 psi | 85% | 3022 fps | 99.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 56,202 psi | 81% | 3117 fps | 99.3% |
| Somchem S335 | <<locked>> | 86% | 61,714 psi | 89% | 2963 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 60,553 psi | 87% | 3058 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 61,830 psi | 89% | 3097 fps | 100% |
| Somchem S361ᴾ | <<locked>> | 100% | 62,627 psi | 90% | 3107 fps | 98.5% |
| Somchem S365ᴾ | <<locked>> | 100% | 62,946 psi | 90% | 3179 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 57,392 psi | 82% | 3091 fps | 99.7% |
| Vihtavuori N130 | <<locked>> | 82% | 61,540 psi | 88% | 2917 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 62,772 psi | 90% | 2943 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 62,250 psi | 89% | 2995 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 62,830 psi | 90% | 3015 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 59,785 psi | 86% | 3015 fps | 100% |
| Vihtavuori N160 | <<locked>> | 96% | 62,120 psi | 89% | 3123 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 49,443 psi | 71% | 2953 fps | 98.7% |
| Vihtavuori N530 | <<locked>> | 84% | 62,279 psi | 89% | 3058 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 60,916 psi | 88% | 3018 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 60,974 psi | 88% | 3133 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 53,664 psi | 77% | 3087 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 54,679 psi | 79% | 3159 fps | 97.9% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 62,540 psi | 90% | 3087 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 58,987 psi | 85% | 3058 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 59,872 psi | 86% | 3163 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,163 psi | 62% | 3074 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 86% | 61,902 psi | 89% | 3100 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 53,998 psi | 78% | 3031 fps | 98.8% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 30"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2015 | <<locked>> | 80% | 55,869 psi | 80% | 2884 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 48,530 psi | 70% | 2825 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 56,884 psi | 82% | 2989 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,137 psi | 68% | 2835 fps | 98.2% |
| Accurate 3100 | <<locked>> | 86% | 31,009 psi | 45% | 2589 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 46,021 psi | 66% | 2831 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,751 psi | 50% | 2700 fps | 98.6% |
| Accurate High Country | <<locked>> | 92% | 42,003 psi | 60% | 2953 fps | 95.7% |
| Accurate MAGPRO | <<locked>> | 96% | 45,992 psi | 66% | 3012 fps | 95.3% |
| ADI APS 450 | <<locked>> | 80% | 58,378 psi | 84% | 2306 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 52,040 psi | 75% | 2966 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,077 psi | 63% | 2818 fps | 99.9% |
| ADI AR 2209 | <<locked>> | 88% | 39,233 psi | 56% | 2802 fps | 95.6% |
| ADI AR 2213 | <<locked>> | 94% | 42,641 psi | 61% | 2900 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 54,172 psi | 78% | 2959 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 55,709 psi | 80% | 2917 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 48,573 psi | 70% | 3038 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 39,276 psi | 56% | 2802 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 39,276 psi | 56% | 2802 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,382 psi | 64% | 2841 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,500 psi | 68% | 2913 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,345 psi | 49% | 2717 fps | 98.8% |
| Alliant Reloder-17 | 90.4 gr | 80% | 38,885 psi | 56% | 2844 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 38,827 psi | 56% | 2795 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 92% | 38,812 psi | 56% | 2844 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 80% | 24,831 psi | 36% | 2461 fps | 96.6% |
| Alliant Reloder-25 | <<locked>> | 90% | 30,211 psi | 43% | 2641 fps | 95.9% |
| Alliant Reloder-26 | <<locked>> | 82% | 28,253 psi | 41% | 2631 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,793 psi | 74% | 2982 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 38,189 psi | 55% | 2828 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 44,382 psi | 64% | 2848 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 38,812 psi | 56% | 2844 fps | 95.9% |
| Bofors RP7 | <<locked>> | 80% | 39,305 psi | 56% | 2723 fps | 96.7% |
| Hodgdon Benchmark | <<locked>> | 80% | 55,303 psi | 79% | 2930 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 53,954 psi | 78% | 2989 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 44,904 psi | 65% | 2861 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 80% | 36,970 psi | 53% | 2753 fps | 96.8% |
| Hodgdon H4350 | <<locked>> | 80% | 40,103 psi | 58% | 2776 fps | 96.3% |
| Hodgdon H4831 | <<locked>> | 94% | 45,716 psi | 66% | 2907 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 94% | 44,730 psi | 64% | 2890 fps | 95.1% |
| Hodgdon H4895 | <<locked>> | 80% | 52,591 psi | 76% | 2976 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,705 psi | 46% | 2602 fps | 99.1% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,168 psi | 71% | 2956 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 35,897 psi | 52% | 2838 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 36,027 psi | 52% | 2759 fps | 96.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,832 psi | 39% | 1673 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,343 psi | 72% | 2923 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 53,098 psi | 76% | 2946 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,311 psi | 67% | 2848 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,747 psi | 70% | 2881 fps | 99% |
| IMR 4350 | <<locked>> | 80% | 35,070 psi | 50% | 2644 fps | 95.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,785 psi | 59% | 2753 fps | 97.5% |
| IMR 4831 | <<locked>> | 80% | 33,562 psi | 48% | 2654 fps | 98.3% |
| IMR 4895 | <<locked>> | 80% | 48,733 psi | 70% | 2940 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 44,730 psi | 64% | 2851 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 96% | 43,352 psi | 62% | 2930 fps | 95.5% |
| IMR 8208 XBR | <<locked>> | 80% | 54,172 psi | 78% | 2959 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 52,025 psi | 75% | 2933 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,082 psi | 73% | 2887 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,369 psi | 67% | 2844 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,174 psi | 55% | 2700 fps | 98.2% |
| Lovex S070 | <<locked>> | 80% | 36,332 psi | 52% | 2680 fps | 96.7% |
| Lovex S071 | <<locked>> | 90% | 30,095 psi | 43% | 2566 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 50,647 psi | 73% | 2904 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,445 psi | 74% | 2900 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,833 psi | 67% | 2897 fps | 100% |
| Norma 204 | <<locked>> | 84% | 39,508 psi | 57% | 2789 fps | 95.6% |
| Norma MRP | <<locked>> | 86% | 32,953 psi | 47% | 2730 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 34,838 psi | 50% | 2700 fps | 98.5% |
| Ramshot Big Game | <<locked>> | 80% | 47,108 psi | 68% | 2917 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 43,134 psi | 62% | 2933 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 33,881 psi | 49% | 2687 fps | 96.7% |
| Ramshot Magnum | <<locked>> | 94% | 35,433 psi | 51% | 2740 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 54,201 psi | 78% | 2989 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 80% | 54,331 psi | 78% | 3002 fps | 100% |
| Ramshot X-Terminator | <<locked>> | 80% | 58,305 psi | 84% | 3012 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,296 psi | 39% | 1716 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,092 psi | 65% | 2844 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 51,271 psi | 74% | 3031 fps | 100% |
| ReloadSwiss RS 60 | 90.4 gr | 80% | 41,437 psi | 60% | 2900 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,606 psi | 50% | 2720 fps | 98.3% |
| ReloadSwiss RS 70 | 91.8 gr | 80% | 33,982 psi | 49% | 2730 fps | 97.8% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 35,317 psi | 51% | 2818 fps | 96.2% |
| Rottweil R 901 | <<locked>> | 80% | 54,665 psi | 79% | 2927 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 48,211 psi | 69% | 2854 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,669 psi | 60% | 2792 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 43,526 psi | 63% | 2838 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 88% | 37,666 psi | 54% | 2776 fps | 95.5% |
| Rottweil R 907 | <<locked>> | 80% | 39,305 psi | 56% | 2723 fps | 96.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,174 psi | 55% | 2700 fps | 98.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 52,025 psi | 75% | 2933 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,369 psi | 67% | 2844 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 36,332 psi | 52% | 2680 fps | 96.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,091 psi | 62% | 2854 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,808 psi | 76% | 2966 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,546 psi | 73% | 2936 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,692 psi | 74% | 2831 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,497 psi | 62% | 2700 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 37,289 psi | 54% | 2641 fps | 96.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 37,304 psi | 54% | 2769 fps | 95.3% |
| Somchem S335 | <<locked>> | 80% | 51,372 psi | 74% | 2831 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,678 psi | 76% | 2949 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,221 psi | 61% | 2795 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 44,614 psi | 64% | 2822 fps | 95% |
| Somchem S365 | <<locked>> | 80% | 31,285 psi | 45% | 2654 fps | 99.8% |
| Somchem S385 | <<locked>> | 86% | 35,723 psi | 51% | 2697 fps | 95.8% |
| Vihtavuori N130 | <<locked>> | 80% | 57,972 psi | 83% | 2874 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 52,257 psi | 75% | 2815 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,370 psi | 69% | 2815 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,689 psi | 70% | 2831 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,263 psi | 58% | 2720 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 36,318 psi | 52% | 2697 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 90% | 35,215 psi | 51% | 2671 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 54,505 psi | 78% | 2956 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 46,978 psi | 67% | 2828 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,694 psi | 51% | 2700 fps | 98.5% |
| Vihtavuori N555 | <<locked>> | 80% | 27,006 psi | 39% | 2536 fps | 96.7% |
| Vihtavuori N560 | <<locked>> | 94% | 44,295 psi | 64% | 2972 fps | 95.5% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,636 psi | 51% | 2667 fps | 99.9% |
| Winchester 748 | <<locked>> | 80% | 55,201 psi | 79% | 3005 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 37,115 psi | 53% | 2756 fps | 96.9% |
| Winchester StaBALL HD | <<locked>> | 82% | 23,279 psi | 33% | 2487 fps | 96.4% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,386 psi | 72% | 2940 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 37,724 psi | 54% | 2733 fps | 95.2% |
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 124 powders for 37 XC loaded with the .375 | 250gr | Hornady GMX. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,215 fps; across all powders the maximum-charge window runs from 1,873 fps to 3,215 fps. Accurate 3100 gives the best case fill at 100 %, and 124 of the 124 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (480 MPa), the top charges use 52–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.375" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, Accurate MAGPRO 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. ReloadSwiss RS 70, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for 37 XC with the .375 | 250gr | Hornady GMX 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.