Load Specifications
Bullet Manufacturer:Rhino Bullets
Bullet Weight:250 gr
Bullet Diameter:0.374"
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 .374 | 250gr | Rhino Penetrator bullet and 121 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, ReloadSwiss RS 70 and Winchester 760.
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% | 60,510 psi | 87% | 2986 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 61,699 psi | 89% | 3081 fps | 99.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,391 psi | 81% | 3077 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 60,800 psi | 87% | 3045 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 62,627 psi | 90% | 3179 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 58,914 psi | 85% | 3245 fps | 98.4% |
| ADI APS 450 | <<locked>> | 84% | 62,613 psi | 90% | 2398 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 59,321 psi | 85% | 3084 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 60,568 psi | 87% | 3087 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 59,306 psi | 85% | 3182 fps | 99.6% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 56,913 psi | 82% | 3182 fps | 98.8% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 36,637 psi | 53% | 2835 fps | 97.4% |
| ADI Benchmark 8208 | <<locked>> | 82% | 61,496 psi | 88% | 3071 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 60,829 psi | 87% | 3232 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 59,364 psi | 85% | 3176 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 61,699 psi | 89% | 3110 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 62,033 psi | 89% | 3140 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 62,859 psi | 90% | 3232 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 60,771 psi | 87% | 3205 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 62,468 psi | 90% | 3222 fps | 99.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 55,956 psi | 80% | 3176 fps | 99.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 52,910 psi | 76% | 3091 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,006 psi | 66% | 3035 fps | 100% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 61,801 psi | 89% | 3307 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 59,625 psi | 86% | 3107 fps | 100% |
| Baschieri & Pellagri 109ᴾ | <<locked>> | 100% | 56,115 psi | 81% | 3077 fps | 95.8% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,387 psi | 74% | 3100 fps | 98.9% |
| Bofors RP3 | <<locked>> | 86% | 59,059 psi | 85% | 3081 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 41,872 psi | 60% | 2953 fps | 96.6% |
| Bofors RP5ᴾ | <<locked>> | 100% | 55,956 psi | 80% | 3176 fps | 99.5% |
| Bofors RP7 | <<locked>> | 92% | 61,975 psi | 89% | 3127 fps | 100% |
| Hodgdon Benchmark | <<locked>> | 82% | 62,497 psi | 90% | 3041 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 62,192 psi | 89% | 3110 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 45,643 psi | 66% | 2969 fps | 97.4% |
| Hodgdon H380 | <<locked>> | 86% | 59,437 psi | 85% | 3104 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 60,510 psi | 87% | 3186 fps | 100% |
| Hodgdon H4350 | <<locked>> | 90% | 59,901 psi | 86% | 3140 fps | 99.7% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 61,192 psi | 88% | 3179 fps | 98.7% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 59,770 psi | 86% | 3159 fps | 98.6% |
| Hodgdon H4895 | <<locked>> | 82% | 59,988 psi | 86% | 3094 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 59,379 psi | 85% | 3091 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 60,974 psi | 88% | 3133 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 44,991 psi | 65% | 3081 fps | 98.8% |
| Hodgdon Superformance | <<locked>> | 92% | 61,670 psi | 89% | 3235 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,434 psi | 52% | 1900 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 61,177 psi | 88% | 3094 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 61,061 psi | 88% | 3058 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 60,060 psi | 86% | 3071 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 62,874 psi | 90% | 3117 fps | 100% |
| IMR 4350 | <<locked>> | 94% | 59,364 psi | 85% | 3107 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 90% | 59,828 psi | 86% | 3100 fps | 100% |
| IMR 4831 | <<locked>> | 96% | 62,497 psi | 90% | 3159 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 59,698 psi | 86% | 3117 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 62,265 psi | 89% | 3159 fps | 98.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,288 psi | 78% | 3153 fps | 98.5% |
| IMR 8208 XBR | <<locked>> | 82% | 61,496 psi | 88% | 3071 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 60,307 psi | 87% | 3051 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 61,395 psi | 88% | 3048 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 60,307 psi | 87% | 3058 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 59,988 psi | 86% | 3091 fps | 100% |
| Lovex S070 | <<locked>> | 94% | 61,583 psi | 88% | 3140 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 46,833 psi | 67% | 2930 fps | 99.7% |
| Norma 201 | <<locked>> | 84% | 61,627 psi | 89% | 3071 fps | 100% |
| Norma 202 | <<locked>> | 84% | 62,439 psi | 90% | 3061 fps | 100% |
| Norma 203B | <<locked>> | 86% | 61,250 psi | 88% | 3127 fps | 100% |
| Norma 204 | <<locked>> | 94% | 60,742 psi | 87% | 3176 fps | 99.6% |
| Norma MRPᴾ | <<locked>> | 100% | 59,814 psi | 86% | 3264 fps | 100% |
| Norma URP | <<locked>> | 94% | 60,597 psi | 87% | 3163 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 62,511 psi | 90% | 3150 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 54,955 psi | 79% | 3173 fps | 98.9% |
| Ramshot Hunter | <<locked>> | 94% | 59,553 psi | 86% | 3173 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,037 psi | 70% | 3038 fps | 99.2% |
| Ramshot TAC | <<locked>> | 82% | 61,873 psi | 89% | 3114 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 82% | 62,250 psi | 89% | 3123 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,202 psi | 53% | 1946 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 59,219 psi | 85% | 3087 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 59,640 psi | 86% | 3163 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 60,104 psi | 86% | 3192 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 62,526 psi | 90% | 3205 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 60,858 psi | 87% | 3241 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,179 psi | 65% | 3077 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 82% | 62,105 psi | 89% | 3035 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 62,453 psi | 90% | 3071 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 59,248 psi | 85% | 3074 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 60,858 psi | 87% | 3143 fps | 99.1% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 61,801 psi | 89% | 3209 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 92% | 61,975 psi | 89% | 3127 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 92% | 59,988 psi | 86% | 3091 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 82% | 60,307 psi | 87% | 3051 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 60,307 psi | 87% | 3058 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 61,583 psi | 88% | 3140 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 60,901 psi | 87% | 3140 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 60,988 psi | 88% | 3094 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 61,627 psi | 89% | 3107 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 62,265 psi | 89% | 2982 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 59,727 psi | 86% | 2936 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 59,872 psi | 86% | 3045 fps | 100% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 61,293 psi | 88% | 3205 fps | 99.8% |
| Somchem S335 | <<locked>> | 84% | 61,902 psi | 89% | 2979 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 60,626 psi | 87% | 3071 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 62,642 psi | 90% | 3120 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 59,234 psi | 85% | 3081 fps | 98.4% |
| Somchem S365 | <<locked>> | 96% | 60,437 psi | 87% | 3156 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 62,482 psi | 90% | 3176 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 62,743 psi | 90% | 2959 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 62,801 psi | 90% | 3012 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 59,466 psi | 85% | 2986 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 60,408 psi | 87% | 3035 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 58,987 psi | 85% | 3097 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,186 psi | 78% | 3041 fps | 99.5% |
| Vihtavuori N530 | <<locked>> | 82% | 62,163 psi | 89% | 3071 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 61,308 psi | 88% | 3038 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 61,960 psi | 89% | 3159 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 59,263 psi | 85% | 3173 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 59,872 psi | 86% | 3258 fps | 98.9% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 47,877 psi | 69% | 3041 fps | 97.2% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 58,914 psi | 85% | 3054 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 60,684 psi | 87% | 3189 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 48,370 psi | 69% | 3169 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 62,163 psi | 89% | 3114 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 58,972 psi | 85% | 3120 fps | 99.6% |
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% | 53,258 psi | 77% | 2894 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,676 psi | 73% | 2913 fps | 99.1% |
| Accurate 3100 | <<locked>> | 80% | 28,384 psi | 41% | 2520 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 50,459 psi | 72% | 2907 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,609 psi | 55% | 2792 fps | 99.5% |
| Accurate MAGPRO | <<locked>> | 92% | 44,193 psi | 63% | 2989 fps | 95.3% |
| ADI APS 450 | <<locked>> | 80% | 58,523 psi | 84% | 2339 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 55,651 psi | 80% | 3035 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 47,369 psi | 68% | 2890 fps | 100% |
| ADI AR 2209 | <<locked>> | 84% | 37,434 psi | 54% | 2772 fps | 95.4% |
| ADI AR 2213 | <<locked>> | 90% | 40,683 psi | 58% | 2871 fps | 95% |
| ADI AR 2225 | <<locked>> | 96% | 32,227 psi | 46% | 2710 fps | 95.3% |
| ADI Benchmark 8208 | <<locked>> | 80% | 57,725 psi | 83% | 3022 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,765 psi | 76% | 3117 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 84% | 37,579 psi | 54% | 2776 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,066 psi | 69% | 2913 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,169 psi | 74% | 2982 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,521 psi | 54% | 2805 fps | 99.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,685 psi | 61% | 2927 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 84% | 37,202 psi | 53% | 2769 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 88% | 37,391 psi | 54% | 2822 fps | 95.8% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,586 psi | 40% | 2559 fps | 98.3% |
| Alliant Reloder-25 | <<locked>> | 86% | 29,356 psi | 42% | 2625 fps | 96% |
| Alliant Reloder-26 | 97.9 gr | 80% | 29,501 psi | 42% | 2677 fps | 97.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 55,825 psi | 80% | 3054 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 52,750 psi | 76% | 3018 fps | 95% |
| Bofors RP15 | <<locked>> | 90% | 36,999 psi | 53% | 2808 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 48,443 psi | 70% | 2923 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 39,131 psi | 56% | 2894 fps | 95.7% |
| Bofors RP5 | <<locked>> | 88% | 37,391 psi | 54% | 2822 fps | 95.8% |
| Bofors RP7 | <<locked>> | 80% | 42,540 psi | 61% | 2802 fps | 97.9% |
| Hodgdon Benchmark | <<locked>> | 80% | 58,900 psi | 85% | 2995 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 58,218 psi | 84% | 3058 fps | 100% |
| Hodgdon H1000 | <<locked>> | 96% | 39,871 psi | 57% | 2841 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 48,733 psi | 70% | 2940 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 40,509 psi | 58% | 2841 fps | 98.1% |
| Hodgdon H4350 | <<locked>> | 80% | 43,366 psi | 62% | 2854 fps | 97.5% |
| Hodgdon H4831 | <<locked>> | 90% | 43,497 psi | 62% | 2881 fps | 95.3% |
| Hodgdon H4831 SC | <<locked>> | 90% | 42,612 psi | 61% | 2861 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 56,333 psi | 81% | 3041 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,070 psi | 50% | 2687 fps | 99.8% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,243 psi | 76% | 3028 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 34,780 psi | 50% | 2822 fps | 95.1% |
| Hodgdon Superformance | <<locked>> | 80% | 39,508 psi | 57% | 2854 fps | 97.6% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,296 psi | 39% | 1703 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,795 psi | 77% | 2989 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 57,261 psi | 82% | 3012 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,835 psi | 72% | 2920 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,011 psi | 75% | 2953 fps | 99.6% |
| IMR 4350 | <<locked>> | 80% | 38,058 psi | 55% | 2726 fps | 96.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,816 psi | 63% | 2831 fps | 98.5% |
| IMR 4831 | <<locked>> | 80% | 37,043 psi | 53% | 2740 fps | 99.3% |
| IMR 4895 | <<locked>> | 80% | 52,504 psi | 75% | 3012 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 42,685 psi | 61% | 2825 fps | 95.2% |
| IMR 7828 SSC | <<locked>> | 92% | 41,495 psi | 60% | 2907 fps | 95.4% |
| IMR 8208 XBR | <<locked>> | 80% | 57,725 psi | 83% | 3022 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 56,362 psi | 81% | 2999 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 54,447 psi | 78% | 2953 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 50,140 psi | 72% | 2913 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,481 psi | 60% | 2782 fps | 99.1% |
| Lovex S070 | <<locked>> | 80% | 39,610 psi | 57% | 2762 fps | 98% |
| Lovex S071 | <<locked>> | 86% | 29,718 psi | 43% | 2556 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 54,520 psi | 78% | 2972 fps | 100% |
| Norma 202 | <<locked>> | 80% | 55,216 psi | 79% | 2966 fps | 100% |
| Norma 203B | <<locked>> | 80% | 50,531 psi | 73% | 2969 fps | 100% |
| Norma 204 | <<locked>> | 80% | 37,594 psi | 54% | 2756 fps | 95.4% |
| Norma MRP | <<locked>> | 82% | 31,923 psi | 46% | 2710 fps | 95.2% |
| Norma URP | <<locked>> | 80% | 38,276 psi | 55% | 2785 fps | 99.4% |
| Ramshot Big Game | <<locked>> | 80% | 51,126 psi | 73% | 2992 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 41,133 psi | 59% | 2910 fps | 95.8% |
| Ramshot Hunter | <<locked>> | 80% | 37,188 psi | 53% | 2776 fps | 98% |
| Ramshot Magnum | <<locked>> | 90% | 34,127 psi | 49% | 2720 fps | 95.3% |
| Ramshot TAC | <<locked>> | 80% | 57,986 psi | 83% | 3061 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 80% | 58,305 psi | 84% | 3071 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,818 psi | 40% | 1745 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,704 psi | 70% | 2923 fps | 99.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 55,608 psi | 80% | 3107 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,310 psi | 65% | 2976 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,435 psi | 55% | 2812 fps | 99.3% |
| ReloadSwiss RS 70 | 97 gr | 80% | 37,217 psi | 53% | 2822 fps | 99% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 34,098 psi | 49% | 2799 fps | 96.2% |
| Rottweil R 901 | <<locked>> | 80% | 58,639 psi | 84% | 2989 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 51,938 psi | 75% | 2923 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,556 psi | 65% | 2871 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 41,495 psi | 60% | 2808 fps | 95.5% |
| Rottweil R 905 | <<locked>> | 84% | 36,260 psi | 52% | 2749 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 80% | 42,540 psi | 61% | 2802 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,481 psi | 60% | 2782 fps | 99.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 56,362 psi | 81% | 2999 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 50,140 psi | 72% | 2913 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,610 psi | 57% | 2762 fps | 98% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,760 psi | 67% | 2927 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 57,058 psi | 82% | 3041 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 54,215 psi | 78% | 3005 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 55,100 psi | 79% | 2890 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,673 psi | 67% | 2759 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,509 psi | 58% | 2720 fps | 98% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 35,911 psi | 52% | 2743 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 54,940 psi | 79% | 2890 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 56,753 psi | 82% | 3018 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 45,876 psi | 66% | 2871 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 45,353 psi | 65% | 2851 fps | 95.7% |
| Somchem S365 | <<locked>> | 80% | 34,751 psi | 50% | 2740 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 34,519 psi | 50% | 2674 fps | 95.7% |
| Vihtavuori N133 | <<locked>> | 80% | 55,651 psi | 80% | 2871 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 52,228 psi | 75% | 2877 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,315 psi | 75% | 2894 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,729 psi | 63% | 2792 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,697 psi | 57% | 2779 fps | 99.5% |
| Vihtavuori N165 | <<locked>> | 86% | 34,026 psi | 49% | 2654 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 58,262 psi | 84% | 3018 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 50,633 psi | 73% | 2894 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,189 psi | 56% | 2785 fps | 99.4% |
| Vihtavuori N555 | <<locked>> | 80% | 30,530 psi | 44% | 2638 fps | 98.3% |
| Vihtavuori N560 | <<locked>> | 90% | 42,496 psi | 61% | 2946 fps | 95.4% |
| Vihtavuori N565 | <<locked>> | 96% | 41,640 psi | 60% | 2920 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,914 psi | 56% | 2743 fps | 100% |
| Winchester 760 | 93.5 gr | 80% | 40,669 psi | 58% | 2844 fps | 98.1% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,366 psi | 35% | 2543 fps | 97.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 54,404 psi | 78% | 3012 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 36,143 psi | 52% | 2710 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 121 powders for 37 XC loaded with the .374 | 250gr | Rhino Penetrator. Alliant Reloder-26 delivers the highest muzzle velocity at 3,307 fps; across all powders the maximum-charge window runs from 1,900 fps to 3,307 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 52–90 %, leaving at least 10 % headroom. The 250.0 gr projectile in 0.374" 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, ReloadSwiss RS 70, Winchester 760 rank at the top here: for 37 XC with the .374 | 250gr | Rhino Penetrator 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.