Load Specifications
Bullet Manufacturer:Rhino Bullets
Bullet Weight:270 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:1:17.0
Load data in caliber 37 XC with .374 | 270gr | Rhino Penetrator bullet and 118 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% | 62,149 psi | 89% | 2887 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 59,190 psi | 85% | 2933 fps | 99.9% |
| Accurate 3100ᴾ | <<locked>> | 100% | 58,247 psi | 84% | 2989 fps | 100% |
| Accurate 4064 | <<locked>> | 86% | 62,424 psi | 90% | 2946 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 60,176 psi | 86% | 3031 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 59,698 psi | 86% | 3159 fps | 99.6% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 60,742 psi | 87% | 3159 fps | 99% |
| ADI APS 450 | <<locked>> | 84% | 62,627 psi | 90% | 2300 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 60,785 psi | 87% | 2986 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 62,076 psi | 89% | 2992 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 61,032 psi | 88% | 3094 fps | 99.9% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 58,624 psi | 84% | 3097 fps | 99.3% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 42,743 psi | 61% | 2808 fps | 96.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,782 psi | 54% | 2772 fps | 98.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 62,961 psi | 90% | 2969 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 62,859 psi | 90% | 3136 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 61,119 psi | 88% | 3087 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 59,538 psi | 86% | 2966 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 59,654 psi | 86% | 2989 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 60,655 psi | 87% | 3084 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 62,743 psi | 90% | 3107 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 60,307 psi | 87% | 3081 fps | 99.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 57,885 psi | 83% | 3094 fps | 99.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 54,810 psi | 79% | 3002 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,471 psi | 68% | 2956 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 98% | 59,480 psi | 85% | 3159 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 61,192 psi | 88% | 3012 fps | 100% |
| Baschieri & Pellagri 109ᴾ | <<locked>> | 100% | 57,392 psi | 82% | 2999 fps | 96.8% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,026 psi | 76% | 3018 fps | 99.5% |
| Bofors RP3 | <<locked>> | 86% | 60,640 psi | 87% | 2982 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 43,381 psi | 62% | 2887 fps | 97.6% |
| Bofors RP5ᴾ | <<locked>> | 100% | 57,885 psi | 83% | 3094 fps | 99.9% |
| Bofors RP7 | <<locked>> | 90% | 59,654 psi | 86% | 2982 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,079 psi | 68% | 2897 fps | 98.4% |
| Hodgdon H380 | <<locked>> | 86% | 60,988 psi | 88% | 3009 fps | 100% |
| Hodgdon H414 | <<locked>> | 92% | 62,308 psi | 90% | 3091 fps | 100% |
| Hodgdon H4350 | <<locked>> | 90% | 61,453 psi | 88% | 3048 fps | 99.9% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 62,932 psi | 90% | 3091 fps | 99.3% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 61,598 psi | 88% | 3074 fps | 99.2% |
| Hodgdon H4895 | <<locked>> | 82% | 61,525 psi | 88% | 2992 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 61,134 psi | 88% | 2995 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 62,482 psi | 90% | 3031 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,514 psi | 67% | 3012 fps | 99.5% |
| Hodgdon Superformance | <<locked>> | 90% | 58,900 psi | 85% | 3081 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,608 psi | 53% | 1821 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 62,569 psi | 90% | 2992 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 62,555 psi | 90% | 2953 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 61,453 psi | 88% | 2969 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 60,379 psi | 87% | 2966 fps | 100% |
| IMR 4350 | <<locked>> | 94% | 60,901 psi | 87% | 3015 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 90% | 61,134 psi | 88% | 3005 fps | 100% |
| IMR 4831 | <<locked>> | 94% | 60,408 psi | 87% | 3018 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 61,250 psi | 88% | 3015 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 59,959 psi | 86% | 3015 fps | 99.1% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 56,028 psi | 80% | 3074 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 82% | 62,961 psi | 90% | 2969 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 61,772 psi | 89% | 2949 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 62,772 psi | 90% | 2946 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 61,743 psi | 89% | 2956 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 61,453 psi | 88% | 2995 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 59,350 psi | 85% | 2995 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,428 psi | 70% | 2851 fps | 99.9% |
| Norma 201 | <<locked>> | 82% | 59,335 psi | 85% | 2923 fps | 100% |
| Norma 202 | <<locked>> | 82% | 60,133 psi | 86% | 2910 fps | 100% |
| Norma 203B | <<locked>> | 86% | 62,772 psi | 90% | 3022 fps | 100% |
| Norma 204 | <<locked>> | 94% | 62,265 psi | 89% | 3081 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 33,243 psi | 48% | 2694 fps | 96.4% |
| Norma MRPᴾ | <<locked>> | 100% | 61,917 psi | 89% | 3176 fps | 100% |
| Norma URP | <<locked>> | 94% | 62,294 psi | 89% | 3064 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 60,220 psi | 87% | 3005 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 56,623 psi | 81% | 3091 fps | 99.4% |
| Ramshot Hunter | <<locked>> | 94% | 61,148 psi | 88% | 3077 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 50,691 psi | 73% | 2963 fps | 99.7% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,304 psi | 54% | 1864 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 60,640 psi | 87% | 2995 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 61,250 psi | 88% | 3064 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 62,236 psi | 89% | 3094 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 60,133 psi | 86% | 3058 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 62,729 psi | 90% | 3146 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,659 psi | 67% | 3005 fps | 99.9% |
| Rottweil R 902 | <<locked>> | 84% | 60,133 psi | 86% | 2923 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 60,858 psi | 87% | 2979 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 62,482 psi | 90% | 3054 fps | 99.6% |
| Rottweil R 905 | <<locked>> | 98% | 59,553 psi | 86% | 3064 fps | 99.9% |
| Rottweil R 907 | <<locked>> | 90% | 59,654 psi | 86% | 2982 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 92% | 61,453 psi | 88% | 2995 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 82% | 61,772 psi | 89% | 2949 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 61,743 psi | 89% | 2956 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 59,350 psi | 85% | 2995 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 62,584 psi | 90% | 3041 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 62,584 psi | 90% | 2999 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 59,161 psi | 85% | 2956 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 59,930 psi | 86% | 2838 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 61,076 psi | 88% | 2838 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 61,424 psi | 88% | 2953 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 59,059 psi | 85% | 3061 fps | 99.9% |
| Somchem S335 | <<locked>> | 82% | 59,596 psi | 86% | 2835 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 62,221 psi | 89% | 2976 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 60,379 psi | 87% | 2972 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 60,771 psi | 87% | 2995 fps | 99% |
| Somchem S365 | <<locked>> | 96% | 62,323 psi | 90% | 3058 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 60,147 psi | 86% | 3031 fps | 100% |
| Vihtavuori N133 | <<locked>> | 82% | 60,510 psi | 87% | 2812 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 60,727 psi | 87% | 2867 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 60,829 psi | 87% | 2887 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 61,873 psi | 89% | 2936 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 60,597 psi | 87% | 3002 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 55,869 psi | 80% | 2956 fps | 99.8% |
| Vihtavuori N540 | <<locked>> | 86% | 62,816 psi | 90% | 2936 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 59,611 psi | 86% | 3012 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 61,105 psi | 88% | 3077 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 61,917 psi | 89% | 3173 fps | 99.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,574 psi | 71% | 2966 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 60,539 psi | 87% | 2963 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 62,468 psi | 90% | 3094 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 50,705 psi | 73% | 3087 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 59,640 psi | 86% | 2966 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 60,713 psi | 87% | 3035 fps | 99.9% |
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% | 54,752 psi | 79% | 2799 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 51,924 psi | 75% | 2825 fps | 99.5% |
| Accurate 3100 | <<locked>> | 80% | 29,515 psi | 42% | 2461 fps | 96.3% |
| Accurate 4064 | <<locked>> | 80% | 51,895 psi | 75% | 2812 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 40,001 psi | 57% | 2717 fps | 99.9% |
| Accurate High Country | 96.8 gr | 84% | 36,405 psi | 52% | 2733 fps | 95% |
| Accurate MAGPRO | <<locked>> | 90% | 42,598 psi | 61% | 2854 fps | 95.6% |
| ADI APS 450 | <<locked>> | 80% | 58,595 psi | 84% | 2244 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 57,130 psi | 82% | 2936 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 48,573 psi | 70% | 2799 fps | 100% |
| ADI AR 2209 | <<locked>> | 82% | 36,071 psi | 52% | 2644 fps | 95.7% |
| ADI AR 2213 | <<locked>> | 88% | 39,247 psi | 56% | 2743 fps | 95.3% |
| ADI AR 2217 | <<locked>> | 98% | 39,987 psi | 57% | 2749 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 94% | 31,241 psi | 45% | 2595 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 59,161 psi | 85% | 2923 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 54,259 psi | 78% | 3022 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 33,982 psi | 49% | 2589 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,240 psi | 71% | 2818 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 52,620 psi | 76% | 2890 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,653 psi | 56% | 2726 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,063 psi | 63% | 2844 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 82% | 35,940 psi | 52% | 2641 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 84% | 33,823 psi | 49% | 2635 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,500 psi | 41% | 2497 fps | 99.1% |
| Alliant Reloder-25 | <<locked>> | 82% | 26,716 psi | 38% | 2451 fps | 95.4% |
| Alliant Reloder-26 | 95 gr | 80% | 30,530 psi | 44% | 2618 fps | 98.2% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 57,188 psi | 82% | 2959 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 50,676 psi | 73% | 2884 fps | 95.2% |
| Bofors RP15 | <<locked>> | 86% | 33,605 psi | 48% | 2628 fps | 95% |
| Bofors RP3 | <<locked>> | 80% | 49,806 psi | 72% | 2835 fps | 100% |
| Bofors RP30 | <<locked>> | 94% | 35,476 psi | 51% | 2710 fps | 95.1% |
| Bofors RP5 | <<locked>> | 84% | 33,823 psi | 49% | 2635 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 43,555 psi | 63% | 2720 fps | 98.6% |
| Hodgdon H1000 | <<locked>> | 94% | 38,450 psi | 55% | 2717 fps | 96% |
| Hodgdon H380 | <<locked>> | 80% | 50,096 psi | 72% | 2851 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 41,829 psi | 60% | 2762 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 80% | 44,585 psi | 64% | 2776 fps | 98.3% |
| Hodgdon H4831 | <<locked>> | 88% | 41,843 psi | 60% | 2749 fps | 95.6% |
| Hodgdon H4831 SC | <<locked>> | 88% | 41,147 psi | 59% | 2733 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 57,812 psi | 83% | 2943 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,216 psi | 52% | 2612 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 54,694 psi | 79% | 2933 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 90% | 33,649 psi | 48% | 2700 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 40,799 psi | 59% | 2782 fps | 98.5% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,412 psi | 39% | 1631 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 55,158 psi | 79% | 2894 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 58,769 psi | 84% | 2910 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,053 psi | 73% | 2825 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 53,185 psi | 76% | 2864 fps | 99.9% |
| IMR 4350 | <<locked>> | 80% | 39,189 psi | 56% | 2651 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,947 psi | 65% | 2746 fps | 99.1% |
| IMR 4831 | <<locked>> | 80% | 38,276 psi | 55% | 2664 fps | 99.7% |
| IMR 4895 | <<locked>> | 80% | 53,983 psi | 78% | 2917 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 86% | 41,176 psi | 59% | 2694 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 90% | 40,103 psi | 58% | 2776 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 80% | 59,161 psi | 85% | 2923 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 57,928 psi | 83% | 2900 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 55,637 psi | 80% | 2854 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 51,416 psi | 74% | 2818 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,598 psi | 61% | 2700 fps | 99.6% |
| Lovex S070 | <<locked>> | 80% | 40,785 psi | 59% | 2687 fps | 98.7% |
| Lovex S071 | <<locked>> | 82% | 27,137 psi | 39% | 2392 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 55,854 psi | 80% | 2874 fps | 100% |
| Norma 202 | <<locked>> | 80% | 56,463 psi | 81% | 2864 fps | 100% |
| Norma 203B | <<locked>> | 80% | 51,967 psi | 75% | 2877 fps | 100% |
| Norma 204 | <<locked>> | 80% | 38,783 psi | 56% | 2684 fps | 96.5% |
| Norma 217 | <<locked>> | 98% | 31,169 psi | 45% | 2635 fps | 95.4% |
| Norma MRP | <<locked>> | 80% | 30,734 psi | 44% | 2582 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 39,523 psi | 57% | 2707 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 80% | 52,446 psi | 75% | 2900 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 36,956 psi | 53% | 2717 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 38,435 psi | 55% | 2700 fps | 98.8% |
| Ramshot Magnum | <<locked>> | 88% | 32,837 psi | 47% | 2598 fps | 95.6% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,992 psi | 40% | 1670 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,922 psi | 72% | 2835 fps | 99.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 57,363 psi | 82% | 3012 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,760 psi | 67% | 2884 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,726 psi | 57% | 2736 fps | 99.8% |
| ReloadSwiss RS 70 | 94.1 gr | 80% | 38,319 psi | 55% | 2749 fps | 99.6% |
| ReloadSwiss RS 76 | <<locked>> | 88% | 30,618 psi | 44% | 2608 fps | 95.3% |
| Rottweil R 902 | <<locked>> | 80% | 53,142 psi | 76% | 2828 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 46,905 psi | 67% | 2782 fps | 100% |
| Rottweil R 904 | <<locked>> | 84% | 40,001 psi | 57% | 2677 fps | 95.8% |
| Rottweil R 905 | <<locked>> | 82% | 35,012 psi | 50% | 2621 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 43,555 psi | 63% | 2720 fps | 98.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,598 psi | 61% | 2700 fps | 99.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 57,928 psi | 83% | 2900 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 51,416 psi | 74% | 2818 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,785 psi | 59% | 2687 fps | 98.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,182 psi | 69% | 2841 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 58,436 psi | 84% | 2943 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 55,622 psi | 80% | 2907 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 56,376 psi | 81% | 2795 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,863 psi | 69% | 2667 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,684 psi | 60% | 2644 fps | 98.7% |
| SNPE Vectan Tubal 8000 | <<locked>> | 82% | 34,679 psi | 50% | 2618 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 56,202 psi | 81% | 2792 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 58,146 psi | 84% | 2923 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 47,137 psi | 68% | 2782 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 40,799 psi | 59% | 2664 fps | 95.1% |
| Somchem S365 | <<locked>> | 80% | 36,100 psi | 52% | 2664 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 33,330 psi | 48% | 2552 fps | 96% |
| Vihtavuori N133 | <<locked>> | 80% | 56,956 psi | 82% | 2769 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 53,664 psi | 77% | 2779 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 53,635 psi | 77% | 2795 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,991 psi | 65% | 2703 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,973 psi | 59% | 2700 fps | 99.9% |
| Vihtavuori N165 | <<locked>> | 84% | 32,880 psi | 47% | 2533 fps | 95.4% |
| Vihtavuori N540 | <<locked>> | 80% | 51,938 psi | 75% | 2799 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 40,408 psi | 58% | 2707 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 80% | 31,676 psi | 46% | 2569 fps | 99.1% |
| Vihtavuori N560 | <<locked>> | 88% | 40,901 psi | 59% | 2812 fps | 95.7% |
| Vihtavuori N565 | <<locked>> | 92% | 37,623 psi | 54% | 2733 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,987 psi | 57% | 2664 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,945 psi | 60% | 2766 fps | 98.8% |
| Winchester StaBALL HD | <<locked>> | 80% | 25,208 psi | 36% | 2497 fps | 99.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 55,840 psi | 80% | 2917 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 84% | 34,809 psi | 50% | 2585 fps | 95.4% |
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 118 powders for 37 XC loaded with the .374 | 270gr | Rhino Penetrator. Norma MRP delivers the highest muzzle velocity at 3,176 fps; across all powders the maximum-charge window runs from 1,821 fps to 3,176 fps. Accurate 3100 gives the best case fill at 100 %, and 118 of the 118 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 270.0 gr projectile in 0.374" calls for a 1:17.0 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 .374 | 270gr | 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.