Load Specifications
Bullet Manufacturer:Barnes
Bullet Weight:270 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 | 270gr | Barnes Banded Solid RN bullet and 112 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 Vihtavuori N560.
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% | 60,002 psi | 86% | 2871 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 60,901 psi | 87% | 2969 fps | 100% |
| Accurate 3100ᴾ | <<locked>> | 100% | 60,394 psi | 87% | 3025 fps | 100% |
| Accurate 4064 | <<locked>> | 84% | 60,481 psi | 87% | 2930 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 62,352 psi | 90% | 3068 fps | 100% |
| Accurate High Country | <<locked>> | 98% | 62,018 psi | 89% | 3202 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 98% | 58,958 psi | 85% | 3146 fps | 99% |
| ADI APS 450 | <<locked>> | 84% | 62,671 psi | 90% | 2316 fps | 100% |
| ADI AR 2206H | <<locked>> | 82% | 62,323 psi | 90% | 3015 fps | 100% |
| ADI AR 2208 | <<locked>> | 86% | 59,872 psi | 86% | 2972 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 59,117 psi | 85% | 3077 fps | 99.9% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 60,713 psi | 87% | 3143 fps | 99.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 44,208 psi | 64% | 2851 fps | 97.5% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 39,233 psi | 56% | 2818 fps | 99.1% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 60,379 psi | 87% | 3114 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 59,248 psi | 85% | 3074 fps | 99.9% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 59,248 psi | 85% | 3074 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 61,206 psi | 88% | 2995 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 61,308 psi | 88% | 3022 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 62,845 psi | 90% | 3120 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 60,684 psi | 87% | 3091 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 62,366 psi | 90% | 3120 fps | 100% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 60,133 psi | 86% | 3133 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 57,072 psi | 82% | 3038 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 49,269 psi | 71% | 2995 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 98% | 62,178 psi | 89% | 3199 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 62,830 psi | 90% | 3041 fps | 100% |
| Baschieri & Pellagri 109ᴾ | <<locked>> | 100% | 59,001 psi | 85% | 3038 fps | 97.4% |
| Bofors RP15ᴾ | <<locked>> | 100% | 55,056 psi | 79% | 3058 fps | 99.7% |
| Bofors RP3 | <<locked>> | 86% | 62,671 psi | 90% | 3015 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 45,150 psi | 65% | 2930 fps | 98.2% |
| Bofors RP5ᴾ | <<locked>> | 100% | 60,133 psi | 86% | 3133 fps | 100% |
| Bofors RP7 | <<locked>> | 90% | 61,337 psi | 88% | 3018 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 48,805 psi | 70% | 2943 fps | 98.9% |
| Hodgdon H380 | <<locked>> | 86% | 62,700 psi | 90% | 3041 fps | 100% |
| Hodgdon H414 | <<locked>> | 90% | 60,191 psi | 86% | 3074 fps | 100% |
| Hodgdon H4350 | <<locked>> | 88% | 59,495 psi | 85% | 3031 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 98% | 60,771 psi | 87% | 3074 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 98% | 59,567 psi | 86% | 3058 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 59,277 psi | 85% | 2982 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 60,307 psi | 87% | 3015 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 48,370 psi | 69% | 3061 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 90% | 61,250 psi | 88% | 3123 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,753 psi | 53% | 1837 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 60,249 psi | 87% | 2972 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 59,335 psi | 85% | 2953 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 62,004 psi | 89% | 3002 fps | 100% |
| IMR 4350 | <<locked>> | 94% | 62,627 psi | 90% | 3051 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 90% | 62,816 psi | 90% | 3038 fps | 100% |
| IMR 4831 | <<locked>> | 94% | 62,410 psi | 90% | 3051 fps | 100% |
| IMR 4895 | <<locked>> | 84% | 62,946 psi | 90% | 3048 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 61,830 psi | 89% | 3054 fps | 99.4% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 58,001 psi | 83% | 3114 fps | 99.5% |
| Lovex S060 | <<locked>> | 82% | 60,495 psi | 87% | 2930 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 59,698 psi | 86% | 2943 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 59,495 psi | 85% | 2982 fps | 100% |
| Lovex S070 | <<locked>> | 92% | 61,206 psi | 88% | 3031 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 50,343 psi | 72% | 2890 fps | 100% |
| Norma 201 | <<locked>> | 82% | 60,887 psi | 87% | 2953 fps | 100% |
| Norma 202 | <<locked>> | 82% | 61,728 psi | 89% | 2940 fps | 100% |
| Norma 203B | <<locked>> | 84% | 60,582 psi | 87% | 3005 fps | 100% |
| Norma 204 | <<locked>> | 92% | 60,278 psi | 87% | 3068 fps | 99.9% |
| Norma 217ᴾ | <<locked>> | 100% | 34,650 psi | 50% | 2743 fps | 97.3% |
| Norma MRP | <<locked>> | 98% | 60,060 psi | 86% | 3159 fps | 100% |
| Norma URP | <<locked>> | 92% | 60,423 psi | 87% | 3051 fps | 100% |
| Ramshot Big Game | <<locked>> | 84% | 62,062 psi | 89% | 3035 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 58,943 psi | 85% | 3133 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 92% | 59,321 psi | 85% | 3064 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 52,968 psi | 76% | 3009 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,449 psi | 54% | 1880 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 62,352 psi | 90% | 3028 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 60,147 psi | 86% | 3077 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 62,294 psi | 89% | 3094 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 60,742 psi | 87% | 3133 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 48,559 psi | 70% | 3051 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 43,598 psi | 63% | 2930 fps | 96.4% |
| Rottweil R 902 | <<locked>> | 84% | 61,685 psi | 89% | 2953 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 62,714 psi | 90% | 3009 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 60,466 psi | 87% | 3041 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 98% | 61,728 psi | 89% | 3104 fps | 100% |
| Rottweil R 907 | <<locked>> | 90% | 61,337 psi | 88% | 3018 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 90% | 59,495 psi | 85% | 2982 fps | 100% |
| Shooters World Precision | <<locked>> | 84% | 59,698 psi | 86% | 2943 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 61,206 psi | 88% | 3031 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 60,466 psi | 87% | 3025 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 60,887 psi | 87% | 2989 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 61,380 psi | 88% | 2867 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 62,598 psi | 90% | 2864 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 59,263 psi | 85% | 2940 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 61,264 psi | 88% | 3100 fps | 100% |
| Somchem S335 | <<locked>> | 82% | 61,076 psi | 88% | 2864 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 62,149 psi | 89% | 3002 fps | 100% |
| Somchem S361 | <<locked>> | 96% | 62,642 psi | 90% | 3035 fps | 99.3% |
| Somchem S365 | <<locked>> | 94% | 60,452 psi | 87% | 3045 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 62,410 psi | 90% | 3074 fps | 100% |
| Vihtavuori N133 | <<locked>> | 82% | 61,960 psi | 89% | 2841 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 62,308 psi | 90% | 2894 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 62,482 psi | 90% | 2917 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 59,915 psi | 86% | 2923 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 62,569 psi | 90% | 3035 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 57,769 psi | 83% | 2995 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 84% | 60,582 psi | 87% | 2920 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 61,598 psi | 88% | 3048 fps | 100% |
| Vihtavuori N555 | <<locked>> | 98% | 59,596 psi | 86% | 3064 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 59,973 psi | 86% | 3159 fps | 99.4% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 51,590 psi | 74% | 3012 fps | 98.6% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 44,976 psi | 65% | 2940 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 62,569 psi | 90% | 2995 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 60,365 psi | 87% | 3077 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 53,664 psi | 77% | 3127 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 61,366 psi | 88% | 2995 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 62,874 psi | 90% | 3074 fps | 100% |
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% | 56,318 psi | 81% | 2825 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 53,316 psi | 77% | 2861 fps | 99.7% |
| Accurate 3100 | <<locked>> | 80% | 30,690 psi | 44% | 2497 fps | 97% |
| Accurate 4064 | <<locked>> | 80% | 53,417 psi | 77% | 2841 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 41,495 psi | 60% | 2753 fps | 100% |
| Accurate High Country | 99.9 gr | 84% | 38,014 psi | 55% | 2779 fps | 95.8% |
| Accurate MAGPRO | <<locked>> | 88% | 41,321 psi | 59% | 2838 fps | 95.4% |
| ADI APS 450 | <<locked>> | 80% | 58,769 psi | 84% | 2264 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 58,697 psi | 84% | 2969 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 49,879 psi | 72% | 2828 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 34,882 psi | 50% | 2625 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 86% | 37,956 psi | 55% | 2726 fps | 95.2% |
| ADI AR 2217 | <<locked>> | 96% | 38,783 psi | 56% | 2736 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 92% | 30,400 psi | 44% | 2579 fps | 95.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 56,246 psi | 81% | 3058 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 35,114 psi | 50% | 2628 fps | 95.7% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 35,114 psi | 50% | 2628 fps | 95.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 50,778 psi | 73% | 2851 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 54,114 psi | 78% | 2923 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 39,914 psi | 57% | 2759 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 45,672 psi | 66% | 2877 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 34,795 psi | 50% | 2621 fps | 95.6% |
| Alliant Reloder-22 | <<locked>> | 82% | 32,851 psi | 47% | 2618 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 80% | 29,544 psi | 42% | 2533 fps | 99.5% |
| Alliant Reloder-25 | <<locked>> | 80% | 25,947 psi | 37% | 2431 fps | 95.1% |
| Alliant Reloder-26 | 98 gr | 80% | 31,807 psi | 46% | 2661 fps | 98.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 58,856 psi | 85% | 2992 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 49,023 psi | 70% | 2867 fps | 95.1% |
| Bofors RP15 | <<locked>> | 86% | 34,795 psi | 50% | 2667 fps | 95.7% |
| Bofors RP3 | <<locked>> | 80% | 51,343 psi | 74% | 2864 fps | 100% |
| Bofors RP30 | <<locked>> | 92% | 34,577 psi | 50% | 2694 fps | 95% |
| Bofors RP5 | <<locked>> | 82% | 32,851 psi | 47% | 2618 fps | 95.1% |
| Bofors RP7 | <<locked>> | 80% | 44,860 psi | 64% | 2756 fps | 99% |
| Hodgdon H1000 | <<locked>> | 92% | 37,246 psi | 54% | 2703 fps | 95.9% |
| Hodgdon H380 | <<locked>> | 80% | 51,503 psi | 74% | 2884 fps | 100% |
| Hodgdon H414 | <<locked>> | 80% | 43,192 psi | 62% | 2799 fps | 99.2% |
| Hodgdon H4350 | <<locked>> | 80% | 45,905 psi | 66% | 2812 fps | 98.7% |
| Hodgdon H4831 | <<locked>> | 86% | 40,495 psi | 58% | 2730 fps | 95.4% |
| Hodgdon H4831 SC | <<locked>> | 86% | 39,769 psi | 57% | 2717 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 37,521 psi | 54% | 2644 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 56,376 psi | 81% | 2963 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 32,663 psi | 47% | 2680 fps | 95.4% |
| Hodgdon Superformance | <<locked>> | 80% | 42,337 psi | 61% | 2822 fps | 98.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,470 psi | 39% | 1644 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 56,681 psi | 81% | 2923 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 52,446 psi | 75% | 2858 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 54,708 psi | 79% | 2897 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 40,437 psi | 58% | 2687 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 46,224 psi | 66% | 2782 fps | 99.4% |
| IMR 4831 | <<locked>> | 80% | 39,653 psi | 57% | 2700 fps | 99.9% |
| IMR 4895 | <<locked>> | 80% | 55,550 psi | 80% | 2949 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 84% | 39,827 psi | 57% | 2677 fps | 95.3% |
| IMR 7828 SSC | <<locked>> | 88% | 38,812 psi | 56% | 2759 fps | 95.6% |
| Lovex S060 | <<locked>> | 80% | 56,956 psi | 82% | 2884 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 52,823 psi | 76% | 2851 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 43,787 psi | 63% | 2733 fps | 99.7% |
| Lovex S070 | <<locked>> | 80% | 42,105 psi | 60% | 2723 fps | 99.1% |
| Lovex S071 | <<locked>> | 80% | 26,382 psi | 38% | 2375 fps | 95.1% |
| Norma 201 | <<locked>> | 80% | 57,305 psi | 82% | 2907 fps | 100% |
| Norma 202 | <<locked>> | 80% | 58,059 psi | 83% | 2894 fps | 100% |
| Norma 203B | <<locked>> | 80% | 53,476 psi | 77% | 2910 fps | 100% |
| Norma 204 | <<locked>> | 80% | 39,987 psi | 57% | 2723 fps | 97.1% |
| Norma 217 | <<locked>> | 96% | 30,472 psi | 44% | 2621 fps | 95.3% |
| Norma MRP | <<locked>> | 80% | 31,894 psi | 46% | 2625 fps | 96.3% |
| Norma URP | <<locked>> | 80% | 40,930 psi | 59% | 2743 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 80% | 54,186 psi | 78% | 2933 fps | 100% |
| Ramshot Grand | <<locked>> | 88% | 38,421 psi | 55% | 2762 fps | 95.9% |
| Ramshot Hunter | <<locked>> | 80% | 39,682 psi | 57% | 2736 fps | 99.2% |
| Ramshot Magnum | <<locked>> | 86% | 31,792 psi | 46% | 2582 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,036 psi | 40% | 1683 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 51,343 psi | 74% | 2871 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 48,443 psi | 70% | 2920 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 41,205 psi | 59% | 2769 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 39,711 psi | 57% | 2789 fps | 99.8% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 29,747 psi | 43% | 2592 fps | 95.1% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 40,480 psi | 58% | 2861 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 54,592 psi | 78% | 2858 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 48,472 psi | 70% | 2815 fps | 100% |
| Rottweil R 904 | <<locked>> | 82% | 38,667 psi | 56% | 2661 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 80% | 33,939 psi | 49% | 2605 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 80% | 44,860 psi | 64% | 2756 fps | 99% |
| Shooters World Long Rifle | <<locked>> | 80% | 43,787 psi | 63% | 2733 fps | 99.7% |
| Shooters World Precision | <<locked>> | 80% | 52,823 psi | 76% | 2851 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 42,105 psi | 60% | 2723 fps | 99.1% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 49,574 psi | 71% | 2871 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 57,043 psi | 82% | 2940 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 57,667 psi | 83% | 2822 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 49,066 psi | 70% | 2694 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 42,902 psi | 62% | 2680 fps | 99.1% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 33,620 psi | 48% | 2598 fps | 95.4% |
| Somchem S335 | <<locked>> | 80% | 57,522 psi | 83% | 2818 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 48,515 psi | 70% | 2812 fps | 100% |
| Somchem S361 | <<locked>> | 84% | 42,105 psi | 60% | 2703 fps | 95.8% |
| Somchem S365 | <<locked>> | 80% | 37,623 psi | 54% | 2700 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 34,505 psi | 50% | 2589 fps | 96.6% |
| Vihtavuori N133 | <<locked>> | 80% | 58,262 psi | 84% | 2799 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 55,114 psi | 79% | 2808 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 55,172 psi | 79% | 2825 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 46,398 psi | 67% | 2736 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 42,366 psi | 61% | 2736 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 31,836 psi | 46% | 2513 fps | 95.2% |
| Vihtavuori N540 | <<locked>> | 80% | 53,316 psi | 77% | 2828 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 41,698 psi | 60% | 2740 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 80% | 32,967 psi | 47% | 2605 fps | 99.4% |
| Vihtavuori N560 | 102.3 gr | 86% | 39,755 psi | 57% | 2795 fps | 95.5% |
| Vihtavuori N565 | <<locked>> | 92% | 39,276 psi | 56% | 2779 fps | 95.8% |
| Vihtavuori N568 | <<locked>> | 98% | 41,945 psi | 60% | 2874 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 41,336 psi | 59% | 2697 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 43,308 psi | 62% | 2802 fps | 99.2% |
| Winchester StaBALL HD | <<locked>> | 80% | 26,107 psi | 38% | 2539 fps | 99.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 57,406 psi | 82% | 2946 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 82% | 33,692 psi | 48% | 2566 fps | 95.2% |
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 | 270gr | Barnes Banded Solid RN. Accurate High Country delivers the highest muzzle velocity at 3,202 fps; across all powders the maximum-charge window runs from 1,837 fps to 3,202 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 50–90 %, leaving at least 10 % headroom. The 270.0 gr projectile in 0.375" calls for a 1:6.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, ADI AR 2217 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, Vihtavuori N560 rank at the top here: for 37 XC with the .375 | 270gr | Barnes Banded Solid RN 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.