Load Specifications
Bullet:.375 | 250gr | Barnes X S
Bullet Manufacturer:Barnes
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 | Barnes X S bullet and 112 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Accurate High Country 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>> | 82% | 60,988 psi | 88% | 2966 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 60,423 psi | 87% | 3041 fps | 99.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 60,162 psi | 86% | 3107 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 61,192 psi | 88% | 3025 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 62,076 psi | 89% | 3153 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 60,756 psi | 87% | 3271 fps | 99.3% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 61,743 psi | 89% | 3268 fps | 98.6% |
| ADI APS 450 | <<locked>> | 84% | 62,729 psi | 90% | 2392 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 61,917 psi | 89% | 3100 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 62,845 psi | 90% | 3100 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 61,714 psi | 89% | 3199 fps | 99.7% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 59,451 psi | 85% | 3202 fps | 99% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 44,077 psi | 63% | 2907 fps | 96.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,465 psi | 57% | 2884 fps | 98.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 59,074 psi | 85% | 3192 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 61,902 psi | 89% | 3192 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 61,902 psi | 89% | 3192 fps | 99.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 60,626 psi | 87% | 3074 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 60,916 psi | 88% | 3104 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 61,467 psi | 88% | 3199 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 59,364 psi | 85% | 3169 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 61,032 psi | 88% | 3186 fps | 99.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 58,885 psi | 85% | 3202 fps | 99.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,811 psi | 80% | 3114 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 48,689 psi | 70% | 3064 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 98% | 60,568 psi | 87% | 3274 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 62,033 psi | 89% | 3120 fps | 100% |
| Baschieri & Pellagri 109ᴾ | <<locked>> | 100% | 58,146 psi | 84% | 3094 fps | 96.1% |
| Bofors RP15ᴾ | <<locked>> | 100% | 54,056 psi | 78% | 3127 fps | 99.2% |
| Bofors RP3 | <<locked>> | 86% | 62,482 psi | 90% | 3100 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,005 psi | 65% | 2999 fps | 97.3% |
| Bofors RP5ᴾ | <<locked>> | 100% | 58,885 psi | 85% | 3202 fps | 99.7% |
| Bofors RP7 | <<locked>> | 90% | 60,771 psi | 87% | 3091 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,269 psi | 69% | 2999 fps | 97.9% |
| Hodgdon H380 | <<locked>> | 86% | 62,250 psi | 89% | 3120 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 59,437 psi | 85% | 3150 fps | 100% |
| Hodgdon H4350 | <<locked>> | 90% | 62,279 psi | 89% | 3156 fps | 99.8% |
| Hodgdon H4831 | <<locked>> | 98% | 59,538 psi | 86% | 3136 fps | 98.4% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 62,294 psi | 89% | 3176 fps | 98.8% |
| Hodgdon H4895 | <<locked>> | 82% | 62,613 psi | 90% | 3107 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 62,033 psi | 89% | 3104 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 59,538 psi | 86% | 3097 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 47,834 psi | 69% | 3120 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 90% | 59,828 psi | 86% | 3192 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,956 psi | 53% | 1896 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 59,596 psi | 86% | 3051 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 62,453 psi | 90% | 3081 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 61,250 psi | 88% | 3074 fps | 100% |
| IMR 4350 | <<locked>> | 94% | 61,670 psi | 89% | 3120 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 90% | 61,975 psi | 89% | 3114 fps | 100% |
| IMR 4831 | <<locked>> | 94% | 61,670 psi | 89% | 3130 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 62,497 psi | 90% | 3133 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 60,756 psi | 87% | 3117 fps | 98.7% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,855 psi | 82% | 3176 fps | 98.7% |
| Lovex S060 | <<locked>> | 82% | 59,915 psi | 86% | 3009 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 59,567 psi | 86% | 3028 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 62,743 psi | 90% | 3107 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 60,771 psi | 87% | 3107 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,444 psi | 72% | 2966 fps | 99.9% |
| Norma 201 | <<locked>> | 82% | 60,916 psi | 88% | 3038 fps | 100% |
| Norma 202 | <<locked>> | 82% | 61,395 psi | 88% | 3025 fps | 100% |
| Norma 203B | <<locked>> | 84% | 60,278 psi | 87% | 3091 fps | 100% |
| Norma 204 | <<locked>> | 92% | 59,132 psi | 85% | 3133 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 35,215 psi | 51% | 2812 fps | 96.2% |
| Norma MRPᴾ | <<locked>> | 100% | 62,729 psi | 90% | 3284 fps | 100% |
| Norma URP | <<locked>> | 92% | 59,567 psi | 86% | 3127 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 61,076 psi | 88% | 3114 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 57,682 psi | 83% | 3192 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 94% | 62,149 psi | 89% | 3189 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,040 psi | 75% | 3068 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,695 psi | 54% | 1942 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 61,786 psi | 89% | 3104 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 62,294 psi | 89% | 3179 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 62,859 psi | 90% | 3209 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 61,453 psi | 88% | 3173 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 59,321 psi | 85% | 3205 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,080 psi | 69% | 3114 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 61,656 psi | 89% | 3038 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 62,497 psi | 90% | 3094 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 59,495 psi | 85% | 3104 fps | 98.9% |
| Rottweil R 905 | <<locked>> | 98% | 60,698 psi | 87% | 3173 fps | 99.7% |
| Rottweil R 907 | <<locked>> | 90% | 60,771 psi | 87% | 3091 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 92% | 62,743 psi | 90% | 3107 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 59,567 psi | 86% | 3028 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 60,771 psi | 87% | 3107 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 59,683 psi | 86% | 3104 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 60,234 psi | 87% | 3068 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 60,974 psi | 88% | 2949 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 62,076 psi | 89% | 2946 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 62,627 psi | 90% | 3061 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 60,191 psi | 86% | 3169 fps | 99.7% |
| Somchem S335 | <<locked>> | 82% | 60,916 psi | 88% | 2946 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 61,743 psi | 89% | 3084 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 61,714 psi | 89% | 3097 fps | 98.6% |
| Somchem S365 | <<locked>> | 94% | 59,393 psi | 85% | 3123 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 61,540 psi | 88% | 3143 fps | 99.9% |
| Vihtavuori N133 | <<locked>> | 82% | 61,380 psi | 88% | 2920 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 61,931 psi | 89% | 2979 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 61,888 psi | 89% | 2995 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 59,495 psi | 85% | 3005 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 61,743 psi | 89% | 3114 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 56,942 psi | 82% | 3061 fps | 99.6% |
| Vihtavuori N540 | <<locked>> | 84% | 60,118 psi | 86% | 3002 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 60,872 psi | 87% | 3127 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 62,700 psi | 90% | 3196 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 62,540 psi | 90% | 3278 fps | 99.1% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,126 psi | 73% | 3077 fps | 97.7% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 61,250 psi | 88% | 3068 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 59,567 psi | 86% | 3153 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 51,517 psi | 74% | 3202 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 60,698 psi | 87% | 3077 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 61,627 psi | 89% | 3136 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% | 57,421 psi | 82% | 2920 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 53,272 psi | 77% | 2933 fps | 99.3% |
| Accurate 3100 | <<locked>> | 80% | 32,010 psi | 46% | 2585 fps | 96.5% |
| Accurate 4064 | <<locked>> | 80% | 54,389 psi | 78% | 2933 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 42,221 psi | 61% | 2838 fps | 99.8% |
| Accurate High Country | 100.9 gr | 86% | 40,770 psi | 59% | 2910 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 90% | 44,150 psi | 63% | 2963 fps | 95.1% |
| ADI APS 450 | <<locked>> | 80% | 58,581 psi | 84% | 2333 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 58,320 psi | 84% | 3051 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 49,603 psi | 71% | 2907 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 37,492 psi | 54% | 2749 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 90% | 43,192 psi | 62% | 2907 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 98% | 41,423 psi | 60% | 2848 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 94% | 33,098 psi | 48% | 2707 fps | 95.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 55,187 psi | 79% | 3133 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 37,739 psi | 54% | 2753 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 82% | 37,739 psi | 54% | 2753 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,763 psi | 73% | 2933 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 54,027 psi | 78% | 3005 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,943 psi | 57% | 2835 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,397 psi | 65% | 2956 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 37,405 psi | 54% | 2749 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 84% | 35,578 psi | 51% | 2749 fps | 95% |
| Alliant Reloder-23 | <<locked>> | 80% | 30,356 psi | 44% | 2612 fps | 99.1% |
| Alliant Reloder-25 | <<locked>> | 82% | 28,631 psi | 41% | 2569 fps | 95.4% |
| Alliant Reloder-26 | 96.7 gr | 80% | 32,590 psi | 47% | 2743 fps | 98.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 58,175 psi | 84% | 3068 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 54,766 psi | 79% | 3035 fps | 95.3% |
| Bofors RP15 | <<locked>> | 88% | 37,521 psi | 54% | 2799 fps | 95.6% |
| Bofors RP3 | <<locked>> | 80% | 51,663 psi | 74% | 2949 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 39,755 psi | 57% | 2884 fps | 95.7% |
| Bofors RP5 | <<locked>> | 84% | 35,578 psi | 51% | 2749 fps | 95% |
| Bofors RP7 | <<locked>> | 80% | 45,179 psi | 65% | 2831 fps | 98.3% |
| Hodgdon H1000 | <<locked>> | 94% | 39,885 psi | 57% | 2818 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 51,590 psi | 74% | 2966 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 43,250 psi | 62% | 2874 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 80% | 45,788 psi | 66% | 2881 fps | 97.9% |
| Hodgdon H4831 | <<locked>> | 88% | 43,207 psi | 62% | 2851 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 90% | 45,136 psi | 65% | 2890 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 59,045 psi | 85% | 3058 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,811 psi | 54% | 2723 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 55,883 psi | 80% | 3045 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 35,375 psi | 51% | 2812 fps | 95.2% |
| Hodgdon Superformance | <<locked>> | 80% | 42,134 psi | 61% | 2887 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,731 psi | 40% | 1699 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 56,144 psi | 81% | 3005 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,199 psi | 75% | 2936 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 54,172 psi | 78% | 2966 fps | 99.7% |
| IMR 4350 | <<locked>> | 80% | 40,596 psi | 58% | 2759 fps | 97.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,151 psi | 66% | 2854 fps | 98.8% |
| IMR 4831 | <<locked>> | 80% | 40,176 psi | 58% | 2782 fps | 99.6% |
| IMR 4895 | <<locked>> | 80% | 55,347 psi | 80% | 3031 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 42,453 psi | 61% | 2799 fps | 95% |
| IMR 7828 SSC | <<locked>> | 90% | 41,539 psi | 60% | 2884 fps | 95.3% |
| Lovex S060 | <<locked>> | 80% | 56,478 psi | 81% | 2963 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 52,939 psi | 76% | 2933 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 44,251 psi | 64% | 2812 fps | 99.4% |
| Lovex S070 | <<locked>> | 80% | 42,656 psi | 61% | 2802 fps | 98.5% |
| Lovex S071 | <<locked>> | 82% | 29,646 psi | 43% | 2520 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 57,421 psi | 82% | 2989 fps | 100% |
| Norma 202 | <<locked>> | 80% | 57,812 psi | 83% | 2979 fps | 100% |
| Norma 203B | <<locked>> | 80% | 53,417 psi | 77% | 2992 fps | 100% |
| Norma 204 | <<locked>> | 80% | 40,147 psi | 58% | 2792 fps | 96.1% |
| Norma 217 | <<locked>> | 98% | 33,228 psi | 48% | 2753 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 32,648 psi | 47% | 2703 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 41,205 psi | 59% | 2822 fps | 99.7% |
| Ramshot Big Game | <<locked>> | 80% | 53,679 psi | 77% | 3012 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 41,118 psi | 59% | 2884 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 39,900 psi | 57% | 2812 fps | 98.6% |
| Ramshot Magnum | <<locked>> | 88% | 34,693 psi | 50% | 2710 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,355 psi | 41% | 1742 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,329 psi | 74% | 2946 fps | 99.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 58,407 psi | 84% | 3127 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 47,993 psi | 69% | 3002 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,553 psi | 60% | 2851 fps | 99.7% |
| ReloadSwiss RS 70 | 95.8 gr | 80% | 39,813 psi | 57% | 2858 fps | 99.4% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 32,590 psi | 47% | 2726 fps | 95.1% |
| Rottweil R 902 | <<locked>> | 80% | 54,810 psi | 79% | 2943 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 48,921 psi | 70% | 2900 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 41,292 psi | 59% | 2782 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 82% | 36,651 psi | 53% | 2733 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 45,179 psi | 65% | 2831 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 44,251 psi | 64% | 2812 fps | 99.4% |
| Shooters World Precision | <<locked>> | 80% | 52,939 psi | 76% | 2933 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,656 psi | 61% | 2802 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,443 psi | 71% | 2949 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 56,623 psi | 81% | 3018 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 57,493 psi | 83% | 2904 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,066 psi | 70% | 2772 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 43,424 psi | 62% | 2753 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 36,289 psi | 52% | 2726 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 57,508 psi | 83% | 2900 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 48,791 psi | 70% | 2897 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 44,976 psi | 65% | 2822 fps | 95.5% |
| Somchem S365 | <<locked>> | 80% | 37,884 psi | 54% | 2782 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 35,288 psi | 51% | 2667 fps | 95.8% |
| Vihtavuori N133 | <<locked>> | 80% | 57,943 psi | 83% | 2877 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 55,158 psi | 79% | 2894 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 54,969 psi | 79% | 2907 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 46,630 psi | 67% | 2818 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,511 psi | 61% | 2812 fps | 99.8% |
| Vihtavuori N165 | <<locked>> | 84% | 34,621 psi | 50% | 2641 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 53,287 psi | 77% | 2910 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 42,076 psi | 60% | 2818 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 80% | 33,837 psi | 49% | 2694 fps | 99% |
| Vihtavuori N560 | <<locked>> | 88% | 42,453 psi | 61% | 2923 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 94% | 42,206 psi | 61% | 2907 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,336 psi | 59% | 2769 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,366 psi | 62% | 2877 fps | 98.6% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,325 psi | 39% | 2628 fps | 99.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 57,029 psi | 82% | 3028 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 36,463 psi | 52% | 2694 fps | 95.1% |
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 112 powders for 37 XC loaded with the .375 | 250gr | Barnes X S. Norma MRP delivers the highest muzzle velocity at 3,284 fps; across all powders the maximum-charge window runs from 1,896 fps to 3,284 fps. Accurate 3100 gives the best case fill at 100 %, and 112 of the 112 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (480 MPa), the top charges use 51–90 %, 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. Alliant Reloder-26, Accurate High Country, ReloadSwiss RS 70 rank at the top here: for 37 XC with the .375 | 250gr | Barnes X S 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.