Load Specifications
Bullet Manufacturer:Rhino Bullets
Bullet Weight:250 gr
Bullet Diameter:0.374"
Bullet Length:<<locked>>
Caliber:37XC 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 37XC with .374 | 250gr | Rhino Solid Shank bullet and 115 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 Hodgdon Superformance.
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% | 62,018 psi | 89% | 3012 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 59,146 psi | 85% | 3054 fps | 99.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 58,262 psi | 84% | 3110 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 62,381 psi | 90% | 3071 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 60,220 psi | 87% | 3159 fps | 100% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 60,959 psi | 88% | 3284 fps | 98.8% |
| ADI APS 450 | <<locked>> | 84% | 62,729 psi | 90% | 2415 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 60,655 psi | 87% | 3110 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 61,917 psi | 89% | 3117 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 61,076 psi | 88% | 3219 fps | 99.8% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 58,653 psi | 84% | 3222 fps | 99.1% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 42,670 psi | 61% | 2910 fps | 96.2% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,724 psi | 54% | 2874 fps | 98% |
| ADI Benchmark 8208 | <<locked>> | 82% | 62,830 psi | 90% | 3097 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 62,584 psi | 90% | 3261 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 59,306 psi | 85% | 3087 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 59,509 psi | 85% | 3114 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 60,568 psi | 87% | 3212 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 62,743 psi | 90% | 3235 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 60,292 psi | 87% | 3202 fps | 99.8% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,928 psi | 83% | 3215 fps | 99.7% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,824 psi | 79% | 3123 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,485 psi | 68% | 3071 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 98% | 59,596 psi | 86% | 3284 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 61,090 psi | 88% | 3136 fps | 100% |
| Baschieri & Pellagri 109ᴾ | <<locked>> | 100% | 57,508 psi | 83% | 3114 fps | 96.4% |
| Bofors RP15ᴾ | <<locked>> | 100% | 52,910 psi | 76% | 3136 fps | 99.2% |
| Bofors RP3 | <<locked>> | 86% | 60,684 psi | 87% | 3107 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 43,352 psi | 62% | 2992 fps | 97.2% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,928 psi | 83% | 3215 fps | 99.7% |
| Bofors RP7 | <<locked>> | 90% | 59,553 psi | 86% | 3104 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,108 psi | 68% | 3009 fps | 98% |
| Hodgdon H380 | <<locked>> | 86% | 60,959 psi | 88% | 3133 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 62,236 psi | 89% | 3215 fps | 100% |
| Hodgdon H4350 | <<locked>> | 90% | 61,438 psi | 88% | 3173 fps | 99.9% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 62,874 psi | 90% | 3212 fps | 99% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 61,627 psi | 89% | 3196 fps | 98.9% |
| Hodgdon H4895 | <<locked>> | 82% | 61,351 psi | 88% | 3120 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 61,105 psi | 88% | 3117 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 62,453 psi | 90% | 3159 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,412 psi | 67% | 3123 fps | 99.2% |
| Hodgdon Superformance | <<locked>> | 90% | 59,088 psi | 85% | 3205 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,550 psi | 53% | 1913 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 62,424 psi | 90% | 3117 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 62,497 psi | 90% | 3084 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 61,337 psi | 88% | 3094 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 60,307 psi | 87% | 3091 fps | 100% |
| IMR 4350 | <<locked>> | 94% | 60,800 psi | 87% | 3136 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 90% | 61,192 psi | 88% | 3130 fps | 100% |
| IMR 4831 | <<locked>> | 94% | 60,307 psi | 87% | 3143 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 61,032 psi | 88% | 3143 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 60,017 psi | 86% | 3136 fps | 98.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 55,970 psi | 80% | 3192 fps | 98.9% |
| IMR 8208 XBR | <<locked>> | 82% | 62,830 psi | 90% | 3097 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 61,699 psi | 89% | 3074 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 62,656 psi | 90% | 3074 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 61,612 psi | 89% | 3084 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 61,366 psi | 88% | 3120 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 59,350 psi | 85% | 3117 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,414 psi | 70% | 2963 fps | 99.8% |
| Norma 201 | <<locked>> | 84% | 62,975 psi | 90% | 3094 fps | 100% |
| Norma 202 | <<locked>> | 82% | 59,988 psi | 86% | 3038 fps | 100% |
| Norma 203B | <<locked>> | 86% | 62,685 psi | 90% | 3150 fps | 100% |
| Norma 204 | <<locked>> | 94% | 62,352 psi | 90% | 3209 fps | 99.8% |
| Norma MRPᴾ | <<locked>> | 100% | 61,989 psi | 89% | 3301 fps | 100% |
| Norma URP | <<locked>> | 94% | 62,250 psi | 89% | 3192 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 59,988 psi | 86% | 3127 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,753 psi | 82% | 3212 fps | 99.2% |
| Ramshot Hunter | <<locked>> | 94% | 61,192 psi | 88% | 3202 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,821 psi | 73% | 3077 fps | 99.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,318 psi | 54% | 1962 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 60,626 psi | 87% | 3117 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 61,090 psi | 88% | 3192 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 62,033 psi | 89% | 3222 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 60,162 psi | 86% | 3182 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 62,903 psi | 90% | 3278 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,731 psi | 67% | 3117 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 59,915 psi | 86% | 3045 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 60,713 psi | 87% | 3100 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 62,613 psi | 90% | 3179 fps | 99.4% |
| Rottweil R 905 | <<locked>> | 98% | 59,611 psi | 86% | 3186 fps | 99.8% |
| Rottweil R 907 | <<locked>> | 90% | 59,553 psi | 86% | 3104 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 92% | 61,366 psi | 88% | 3120 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 82% | 61,699 psi | 89% | 3074 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 61,612 psi | 89% | 3084 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 59,350 psi | 85% | 3117 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 62,569 psi | 90% | 3169 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 62,526 psi | 90% | 3123 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 62,961 psi | 90% | 3133 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 59,727 psi | 86% | 2963 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 60,974 psi | 88% | 2959 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 61,337 psi | 88% | 3074 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 59,117 psi | 85% | 3182 fps | 99.7% |
| Somchem S335 | <<locked>> | 82% | 59,466 psi | 85% | 2956 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 62,134 psi | 89% | 3100 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 60,365 psi | 87% | 3097 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 60,872 psi | 87% | 3114 fps | 98.8% |
| Somchem S365 | <<locked>> | 96% | 62,192 psi | 89% | 3182 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 60,234 psi | 87% | 3156 fps | 100% |
| Vihtavuori N133 | <<locked>> | 82% | 60,292 psi | 87% | 2936 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 60,495 psi | 87% | 2992 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 60,742 psi | 87% | 3012 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 61,902 psi | 89% | 3061 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 60,626 psi | 87% | 3127 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,811 psi | 80% | 3074 fps | 99.7% |
| Vihtavuori N540 | <<locked>> | 86% | 62,787 psi | 90% | 3061 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 59,654 psi | 86% | 3136 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 61,076 psi | 88% | 3202 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 61,975 psi | 89% | 3297 fps | 99.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,617 psi | 71% | 3081 fps | 97.8% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 60,466 psi | 87% | 3081 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 62,439 psi | 90% | 3219 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,792 psi | 73% | 3205 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 59,538 psi | 86% | 3091 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 60,829 psi | 87% | 3156 fps | 99.8% |
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 2495 | <<locked>> | 80% | 54,462 psi | 78% | 2917 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,822 psi | 74% | 2943 fps | 99.3% |
| Accurate 3100 | <<locked>> | 80% | 29,399 psi | 42% | 2552 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 51,634 psi | 74% | 2930 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,856 psi | 57% | 2825 fps | 99.7% |
| Accurate MAGPRO | <<locked>> | 90% | 42,583 psi | 61% | 2963 fps | 95% |
| ADI APS 450 | <<locked>> | 80% | 58,566 psi | 84% | 2356 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 57,014 psi | 82% | 3061 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 48,356 psi | 69% | 2913 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 35,998 psi | 52% | 2746 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 90% | 41,858 psi | 60% | 2910 fps | 95.7% |
| ADI AR 2217 | <<locked>> | 98% | 39,958 psi | 57% | 2851 fps | 95.2% |
| ADI AR 2225 | <<locked>> | 94% | 31,227 psi | 45% | 2687 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 59,045 psi | 85% | 3048 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 54,302 psi | 78% | 3150 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,095 psi | 71% | 2936 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,504 psi | 75% | 3012 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,435 psi | 55% | 2831 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 43,903 psi | 63% | 2956 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 35,824 psi | 51% | 2743 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 86% | 36,129 psi | 52% | 2795 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,340 psi | 41% | 2589 fps | 98.7% |
| Alliant Reloder-25 | <<locked>> | 84% | 28,369 psi | 41% | 2598 fps | 95.6% |
| Alliant Reloder-26 | 100.4 gr | 80% | 30,472 psi | 44% | 2713 fps | 97.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 57,145 psi | 82% | 3081 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 98% | 53,983 psi | 78% | 3054 fps | 95.6% |
| Bofors RP15 | <<locked>> | 88% | 35,766 psi | 51% | 2785 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 49,748 psi | 71% | 2953 fps | 100% |
| Bofors RP30 | <<locked>> | 96% | 37,884 psi | 54% | 2871 fps | 95.4% |
| Bofors RP5 | <<locked>> | 86% | 36,129 psi | 52% | 2795 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 43,439 psi | 62% | 2828 fps | 98.2% |
| Hodgdon H1000 | <<locked>> | 94% | 38,392 psi | 55% | 2818 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 49,980 psi | 72% | 2969 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 41,669 psi | 60% | 2871 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 80% | 44,527 psi | 64% | 2890 fps | 97.9% |
| Hodgdon H4831 | <<locked>> | 88% | 41,814 psi | 60% | 2854 fps | 95% |
| Hodgdon H4831 SC | <<locked>> | 90% | 43,918 psi | 63% | 2897 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 57,682 psi | 83% | 3071 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,056 psi | 52% | 2713 fps | 99.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 54,592 psi | 78% | 3054 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 92% | 35,839 psi | 51% | 2864 fps | 96% |
| Hodgdon Superformance | 103.5 gr | 80% | 40,698 psi | 58% | 2887 fps | 98.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,383 psi | 39% | 1716 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 55,085 psi | 79% | 3015 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 58,537 psi | 84% | 3035 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 50,879 psi | 73% | 2946 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,171 psi | 76% | 2982 fps | 99.7% |
| IMR 4350 | <<locked>> | 80% | 39,131 psi | 56% | 2759 fps | 97.3% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,904 psi | 65% | 2861 fps | 98.8% |
| IMR 4831 | <<locked>> | 80% | 38,189 psi | 55% | 2772 fps | 99.5% |
| IMR 4895 | <<locked>> | 80% | 53,853 psi | 77% | 3041 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 88% | 43,816 psi | 63% | 2858 fps | 95.8% |
| IMR 7828 SSC | <<locked>> | 90% | 39,987 psi | 57% | 2881 fps | 95.1% |
| IMR 8208 XBR | <<locked>> | 80% | 59,045 psi | 85% | 3048 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 57,754 psi | 83% | 3025 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 55,419 psi | 80% | 2976 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 51,198 psi | 74% | 2936 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,366 psi | 61% | 2808 fps | 99.3% |
| Lovex S070 | <<locked>> | 80% | 40,712 psi | 58% | 2795 fps | 98.3% |
| Lovex S071 | <<locked>> | 84% | 28,790 psi | 41% | 2536 fps | 95.4% |
| Norma 201 | <<locked>> | 80% | 55,608 psi | 80% | 2995 fps | 100% |
| Norma 202 | <<locked>> | 80% | 56,333 psi | 81% | 2989 fps | 100% |
| Norma 203B | <<locked>> | 80% | 51,837 psi | 74% | 2999 fps | 100% |
| Norma 204 | <<locked>> | 80% | 38,609 psi | 55% | 2789 fps | 95.9% |
| Norma MRP | <<locked>> | 82% | 32,924 psi | 47% | 2746 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 39,465 psi | 57% | 2815 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 80% | 52,489 psi | 75% | 3022 fps | 100% |
| Ramshot Grand | <<locked>> | 90% | 39,581 psi | 57% | 2884 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 38,261 psi | 55% | 2805 fps | 98.4% |
| Ramshot Magnum | <<locked>> | 88% | 32,822 psi | 47% | 2694 fps | 95% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,920 psi | 40% | 1759 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,835 psi | 72% | 2953 fps | 99.7% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 57,116 psi | 82% | 3136 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,630 psi | 67% | 3005 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,610 psi | 57% | 2841 fps | 99.6% |
| ReloadSwiss RS 70 | 99.5 gr | 80% | 38,305 psi | 55% | 2858 fps | 99.3% |
| ReloadSwiss RS 76 | <<locked>> | 90% | 32,750 psi | 47% | 2769 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 52,997 psi | 76% | 2949 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,876 psi | 67% | 2900 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 39,914 psi | 57% | 2782 fps | 95.2% |
| Rottweil R 905 | <<locked>> | 82% | 34,925 psi | 50% | 2723 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 43,439 psi | 62% | 2828 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,366 psi | 61% | 2808 fps | 99.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 57,754 psi | 83% | 3025 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 51,198 psi | 74% | 2936 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,712 psi | 58% | 2795 fps | 98.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 47,979 psi | 69% | 2956 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 58,407 psi | 84% | 3068 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 55,448 psi | 80% | 3028 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 56,188 psi | 81% | 2917 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,688 psi | 69% | 2782 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,553 psi | 60% | 2753 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 84% | 36,985 psi | 53% | 2776 fps | 95.9% |
| Somchem S335 | <<locked>> | 80% | 55,941 psi | 80% | 2913 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 58,088 psi | 83% | 3045 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 46,905 psi | 67% | 2897 fps | 100% |
| Somchem S361 | <<locked>> | 86% | 43,511 psi | 63% | 2825 fps | 95.4% |
| Somchem S365 | <<locked>> | 80% | 36,027 psi | 52% | 2772 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 33,286 psi | 48% | 2651 fps | 95.4% |
| Vihtavuori N133 | <<locked>> | 80% | 56,753 psi | 82% | 2890 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 53,432 psi | 77% | 2900 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,606 psi | 77% | 2917 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,947 psi | 65% | 2818 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,872 psi | 59% | 2808 fps | 99.7% |
| Vihtavuori N165 | <<locked>> | 86% | 35,085 psi | 50% | 2687 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 51,837 psi | 74% | 2917 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,306 psi | 58% | 2815 fps | 99.6% |
| Vihtavuori N555 | <<locked>> | 80% | 31,488 psi | 45% | 2664 fps | 98.6% |
| Vihtavuori N560 | <<locked>> | 88% | 40,930 psi | 59% | 2920 fps | 95.1% |
| Vihtavuori N565 | <<locked>> | 94% | 40,292 psi | 58% | 2897 fps | 95.3% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,943 psi | 57% | 2772 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,771 psi | 60% | 2874 fps | 98.5% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,106 psi | 36% | 2579 fps | 98.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 55,666 psi | 80% | 3035 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 86% | 37,289 psi | 54% | 2746 fps | 95.8% |
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 120 powders for 37XC loaded with the .374 | 250gr | Rhino Solid Shank. Norma MRP delivers the highest muzzle velocity at 3,301 fps; across all powders the maximum-charge window runs from 1,913 fps to 3,301 fps. Accurate 3100 gives the best case fill at 100 %, and 120 of the 120 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (480 MPa), the top charges use 48–90 %, 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, Hodgdon Superformance rank at the top here: for 37XC with the .374 | 250gr | Rhino Solid Shank they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, IMR 8133 Enduron, ReloadSwiss RS 80, Vihtavuori N170 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.