Load Specifications
Bullet Manufacturer:North Fork
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:1:6.0
Load data in caliber 37 XC with .375 | 250gr | NorthFork Bonded Core bullet and 121 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Accurate High Country, Alliant Reloder-26 and ReloadSwiss RS 70.
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 2495 | <<locked>> | 84% | 61,337 psi | 88% | 2999 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 62,482 psi | 90% | 3094 fps | 99.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 57,334 psi | 82% | 3094 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 61,627 psi | 89% | 3058 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 59,364 psi | 85% | 3143 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 58,682 psi | 84% | 3261 fps | 99.3% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 59,901 psi | 86% | 3261 fps | 98.6% |
| ADI APS 450 | <<locked>> | 84% | 62,511 psi | 90% | 2405 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 60,075 psi | 86% | 3100 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 61,235 psi | 88% | 3104 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 60,205 psi | 86% | 3199 fps | 99.7% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 57,841 psi | 83% | 3202 fps | 99% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,275 psi | 54% | 2854 fps | 97.8% |
| ADI Benchmark 8208 | <<locked>> | 82% | 62,250 psi | 89% | 3087 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 61,786 psi | 89% | 3248 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 60,249 psi | 87% | 3192 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 60,249 psi | 87% | 3192 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 62,424 psi | 90% | 3123 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 62,758 psi | 90% | 3156 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 59,843 psi | 86% | 3199 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 61,859 psi | 89% | 3222 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 59,393 psi | 85% | 3186 fps | 99.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,043 psi | 82% | 3196 fps | 99.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,867 psi | 77% | 3110 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,760 psi | 67% | 3054 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 98% | 58,465 psi | 84% | 3268 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 60,452 psi | 87% | 3123 fps | 100% |
| Baschieri & Pellagri 109ᴾ | <<locked>> | 100% | 56,782 psi | 82% | 3097 fps | 96.1% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,228 psi | 75% | 3120 fps | 99.1% |
| Bofors RP3 | <<locked>> | 86% | 59,959 psi | 86% | 3097 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 42,598 psi | 61% | 2972 fps | 96.9% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,043 psi | 82% | 3196 fps | 99.6% |
| Bofors RP7 | <<locked>> | 92% | 62,598 psi | 90% | 3143 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 62,932 psi | 90% | 3123 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 46,427 psi | 67% | 2989 fps | 97.8% |
| Hodgdon H380 | <<locked>> | 86% | 60,147 psi | 86% | 3117 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 61,453 psi | 88% | 3202 fps | 100% |
| Hodgdon H4350 | <<locked>> | 90% | 60,684 psi | 87% | 3156 fps | 99.8% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 62,018 psi | 89% | 3196 fps | 98.9% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 60,771 psi | 87% | 3176 fps | 98.8% |
| Hodgdon H4895 | <<locked>> | 82% | 60,785 psi | 87% | 3107 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 60,249 psi | 87% | 3107 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 61,714 psi | 89% | 3146 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,803 psi | 66% | 3104 fps | 99% |
| Hodgdon Superformance | <<locked>> | 92% | 62,613 psi | 90% | 3251 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,593 psi | 53% | 1909 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 61,844 psi | 89% | 3107 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 61,786 psi | 89% | 3071 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 60,800 psi | 87% | 3084 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 59,654 psi | 86% | 3077 fps | 100% |
| IMR 4350 | <<locked>> | 94% | 60,060 psi | 86% | 3123 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 90% | 60,553 psi | 87% | 3117 fps | 100% |
| IMR 4831 | <<locked>> | 94% | 59,538 psi | 86% | 3130 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 60,466 psi | 87% | 3130 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 59,248 psi | 85% | 3120 fps | 98.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,143 psi | 79% | 3173 fps | 98.7% |
| IMR 8208 XBR | <<locked>> | 82% | 62,250 psi | 89% | 3087 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 61,090 psi | 88% | 3064 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 61,975 psi | 89% | 3061 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 61,061 psi | 88% | 3074 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 60,756 psi | 87% | 3107 fps | 100% |
| Lovex S070 | <<locked>> | 94% | 62,410 psi | 90% | 3156 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,688 psi | 69% | 2946 fps | 99.8% |
| Norma 201 | <<locked>> | 84% | 62,424 psi | 90% | 3084 fps | 100% |
| Norma 202 | <<locked>> | 82% | 59,335 psi | 85% | 3025 fps | 100% |
| Norma 203B | <<locked>> | 86% | 62,033 psi | 89% | 3140 fps | 100% |
| Norma 204 | <<locked>> | 94% | 61,641 psi | 89% | 3192 fps | 99.7% |
| Norma MRPᴾ | <<locked>> | 100% | 61,105 psi | 88% | 3284 fps | 100% |
| Norma URP | <<locked>> | 94% | 61,424 psi | 88% | 3176 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 59,335 psi | 85% | 3114 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,724 psi | 80% | 3189 fps | 99% |
| Ramshot Hunter | <<locked>> | 94% | 60,437 psi | 87% | 3189 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,951 psi | 72% | 3058 fps | 99.4% |
| Ramshot TAC | <<locked>> | 82% | 62,613 psi | 90% | 3130 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,231 psi | 53% | 1952 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 60,002 psi | 86% | 3104 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 60,481 psi | 87% | 3179 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 61,279 psi | 88% | 3209 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 59,321 psi | 85% | 3166 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 61,946 psi | 89% | 3261 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,948 psi | 66% | 3097 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 82% | 62,772 psi | 90% | 3048 fps | 100% |
| Rottweil R 902 | <<locked>> | 84% | 59,350 psi | 85% | 3035 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 60,002 psi | 86% | 3091 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 61,699 psi | 89% | 3159 fps | 99.3% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 62,932 psi | 90% | 3228 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 92% | 62,598 psi | 90% | 3143 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 92% | 60,756 psi | 87% | 3107 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 82% | 61,090 psi | 88% | 3064 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 61,061 psi | 88% | 3074 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 62,410 psi | 90% | 3156 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 61,743 psi | 89% | 3153 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 61,873 psi | 89% | 3110 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 62,294 psi | 89% | 3120 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 62,903 psi | 90% | 2995 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 60,437 psi | 87% | 2949 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 60,597 psi | 87% | 3061 fps | 100% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 62,410 psi | 90% | 3225 fps | 99.9% |
| Somchem S335 | <<locked>> | 84% | 62,642 psi | 90% | 2992 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 61,453 psi | 88% | 3087 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 59,654 psi | 86% | 3084 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 59,944 psi | 86% | 3097 fps | 98.6% |
| Somchem S365 | <<locked>> | 96% | 61,322 psi | 88% | 3169 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 59,538 psi | 86% | 3143 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 82% | 59,669 psi | 86% | 2927 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 59,828 psi | 86% | 2979 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 60,060 psi | 86% | 2999 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 61,264 psi | 88% | 3051 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 59,857 psi | 86% | 3114 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,969 psi | 79% | 3054 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 82% | 62,946 psi | 90% | 3084 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 61,989 psi | 89% | 3048 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 62,903 psi | 90% | 3176 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 60,263 psi | 87% | 3186 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 61,134 psi | 88% | 3281 fps | 99.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 48,776 psi | 70% | 3061 fps | 97.5% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 59,828 psi | 86% | 3071 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 61,656 psi | 89% | 3205 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,647 psi | 71% | 3189 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 62,874 psi | 90% | 3127 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 60,002 psi | 86% | 3140 fps | 99.7% |
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 2495 | <<locked>> | 80% | 53,954 psi | 78% | 2907 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,329 psi | 74% | 2930 fps | 99.2% |
| Accurate 3100 | <<locked>> | 80% | 28,935 psi | 42% | 2536 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 51,126 psi | 73% | 2920 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,305 psi | 56% | 2808 fps | 99.6% |
| Accurate High Country | 103.5 gr | 86% | 38,450 psi | 55% | 2884 fps | 95% |
| Accurate MAGPRO | <<locked>> | 92% | 44,991 psi | 65% | 3005 fps | 95.6% |
| ADI APS 450 | <<locked>> | 80% | 58,479 psi | 84% | 2346 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 56,434 psi | 81% | 3048 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 47,935 psi | 69% | 2904 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 37,985 psi | 55% | 2789 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 90% | 41,278 psi | 59% | 2890 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 96% | 32,779 psi | 47% | 2730 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 58,465 psi | 84% | 3035 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 53,563 psi | 77% | 3133 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 35,708 psi | 51% | 2733 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 35,708 psi | 51% | 2733 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,660 psi | 70% | 2927 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,938 psi | 75% | 2999 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,058 psi | 55% | 2822 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,381 psi | 62% | 2943 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 37,768 psi | 54% | 2785 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 86% | 35,607 psi | 51% | 2779 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,007 psi | 40% | 2575 fps | 98.5% |
| Alliant Reloder-25 | <<locked>> | 84% | 28,050 psi | 40% | 2582 fps | 95.3% |
| Alliant Reloder-26 | 99.2 gr | 80% | 30,023 psi | 43% | 2697 fps | 97.4% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 56,492 psi | 81% | 3068 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 53,432 psi | 77% | 3038 fps | 95.3% |
| Bofors RP15 | <<locked>> | 90% | 37,637 psi | 54% | 2828 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 49,182 psi | 71% | 2940 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 37,275 psi | 54% | 2851 fps | 95.1% |
| Bofors RP5 | <<locked>> | 86% | 35,607 psi | 51% | 2779 fps | 95.3% |
| Bofors RP7 | <<locked>> | 80% | 43,062 psi | 62% | 2818 fps | 98.1% |
| Hodgdon BL-C2 | <<locked>> | 80% | 58,929 psi | 85% | 3071 fps | 100% |
| Hodgdon H1000 | <<locked>> | 94% | 37,884 psi | 54% | 2802 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 49,414 psi | 71% | 2956 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 41,176 psi | 59% | 2858 fps | 98.3% |
| Hodgdon H4350 | <<locked>> | 80% | 44,048 psi | 63% | 2874 fps | 97.7% |
| Hodgdon H4831 | <<locked>> | 90% | 44,121 psi | 63% | 2897 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 90% | 43,250 psi | 62% | 2881 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 57,072 psi | 82% | 3054 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,636 psi | 51% | 2703 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,998 psi | 78% | 3041 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 35,302 psi | 51% | 2841 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 40,161 psi | 58% | 2871 fps | 97.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,325 psi | 39% | 1709 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 54,520 psi | 78% | 3005 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 58,015 psi | 83% | 3022 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,444 psi | 72% | 2933 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,678 psi | 76% | 2969 fps | 99.7% |
| IMR 4350 | <<locked>> | 80% | 38,667 psi | 56% | 2743 fps | 97.1% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,425 psi | 64% | 2848 fps | 98.7% |
| IMR 4831 | <<locked>> | 80% | 37,681 psi | 54% | 2759 fps | 99.4% |
| IMR 4895 | <<locked>> | 80% | 53,243 psi | 76% | 3025 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 43,207 psi | 62% | 2841 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 92% | 42,206 psi | 61% | 2927 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 80% | 58,465 psi | 84% | 3035 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 57,116 psi | 82% | 3012 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 55,027 psi | 79% | 2966 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 50,749 psi | 73% | 2927 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,989 psi | 60% | 2795 fps | 99.2% |
| Lovex S070 | <<locked>> | 80% | 40,277 psi | 58% | 2782 fps | 98.2% |
| Lovex S071 | <<locked>> | 84% | 28,355 psi | 41% | 2520 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 55,158 psi | 79% | 2986 fps | 100% |
| Norma 202 | <<locked>> | 80% | 55,854 psi | 80% | 2979 fps | 100% |
| Norma 203B | <<locked>> | 80% | 51,271 psi | 74% | 2986 fps | 100% |
| Norma 204 | <<locked>> | 80% | 38,159 psi | 55% | 2772 fps | 95.7% |
| Norma MRP | <<locked>> | 82% | 32,430 psi | 47% | 2726 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 38,928 psi | 56% | 2802 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 80% | 51,808 psi | 74% | 3009 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 38,986 psi | 56% | 2864 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 37,797 psi | 54% | 2792 fps | 98.3% |
| Ramshot Magnum | <<locked>> | 90% | 34,751 psi | 50% | 2743 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 58,653 psi | 84% | 3074 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,833 psi | 40% | 1752 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,356 psi | 71% | 2940 fps | 99.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 56,463 psi | 81% | 3123 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,050 psi | 66% | 2992 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,073 psi | 56% | 2828 fps | 99.5% |
| ReloadSwiss RS 70 | 98.3 gr | 80% | 37,811 psi | 54% | 2841 fps | 99.2% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 32,329 psi | 46% | 2753 fps | 95.4% |
| Rottweil R 901 | <<locked>> | 80% | 59,292 psi | 85% | 3002 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 52,576 psi | 76% | 2936 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,296 psi | 67% | 2887 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 42,061 psi | 60% | 2825 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 84% | 36,767 psi | 53% | 2766 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 43,062 psi | 62% | 2818 fps | 98.1% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,989 psi | 60% | 2795 fps | 99.2% |
| Shooters World Match Rifle | <<locked>> | 80% | 57,116 psi | 82% | 3012 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 50,749 psi | 73% | 2927 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,277 psi | 58% | 2782 fps | 98.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,442 psi | 68% | 2943 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 57,754 psi | 83% | 3054 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 54,882 psi | 79% | 3018 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 55,709 psi | 80% | 2904 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,297 psi | 68% | 2772 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,133 psi | 59% | 2736 fps | 98.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 36,419 psi | 52% | 2759 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 55,521 psi | 80% | 2904 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 57,421 psi | 82% | 3035 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 46,470 psi | 67% | 2884 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 43,033 psi | 62% | 2812 fps | 95.2% |
| Somchem S365 | <<locked>> | 80% | 35,476 psi | 51% | 2759 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 32,822 psi | 47% | 2635 fps | 95.1% |
| Vihtavuori N133 | <<locked>> | 80% | 56,318 psi | 81% | 2884 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 52,953 psi | 76% | 2890 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,040 psi | 76% | 2907 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,411 psi | 64% | 2808 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,350 psi | 58% | 2795 fps | 99.6% |
| Vihtavuori N165 | <<locked>> | 86% | 34,577 psi | 50% | 2671 fps | 95.4% |
| Vihtavuori N530 | <<locked>> | 80% | 59,016 psi | 85% | 3035 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 51,285 psi | 74% | 2907 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,842 psi | 57% | 2802 fps | 99.5% |
| Vihtavuori N555 | <<locked>> | 80% | 31,067 psi | 45% | 2654 fps | 98.5% |
| Vihtavuori N560 | <<locked>> | 90% | 43,163 psi | 62% | 2966 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 94% | 39,668 psi | 57% | 2881 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,450 psi | 57% | 2759 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,292 psi | 59% | 2861 fps | 98.3% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,801 psi | 36% | 2562 fps | 98.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 55,114 psi | 79% | 3025 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 36,782 psi | 53% | 2730 fps | 95.5% |
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 121 powders for 37 XC loaded with the .375 | 250gr | NorthFork Bonded Core. Norma MRP delivers the highest muzzle velocity at 3,284 fps; across all powders the maximum-charge window runs from 1,909 fps to 3,284 fps. Accurate 3100 gives the best case fill at 100 %, and 121 of the 121 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (480 MPa), the top charges use 53–90 %, 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. Accurate 3100, Accurate MAGPRO, ADI AR 2213 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. Accurate High Country, Alliant Reloder-26, ReloadSwiss RS 70 rank at the top here: for 37 XC 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.