Load Specifications
Bullet Manufacturer:Hammer
Bullet Weight:248 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:1:15.5
Load data in caliber 37 XC with .375 | 248gr | Hammer Hammer Hunter bullet and 124 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 70, Hodgdon Superformance and Alliant Reloder-16.
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 2015 | <<locked>> | 82% | 61,554 psi | 88% | 2966 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 61,960 psi | 89% | 3005 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 59,553 psi | 86% | 3045 fps | 99.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,577 psi | 77% | 3038 fps | 99.9% |
| Accurate 4064 | <<locked>> | 88% | 62,279 psi | 89% | 3068 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 59,698 psi | 86% | 3143 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 58,784 psi | 84% | 3261 fps | 99% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 55,738 psi | 80% | 3196 fps | 97.6% |
| ADI APS 450 | <<locked>> | 84% | 62,424 psi | 90% | 2385 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 61,003 psi | 88% | 3107 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 62,178 psi | 89% | 3110 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 60,655 psi | 87% | 3199 fps | 99.6% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 54,418 psi | 78% | 3136 fps | 98.1% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 34,925 psi | 50% | 2782 fps | 96.2% |
| ADI Benchmark 8208 | <<locked>> | 82% | 59,509 psi | 85% | 3045 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 61,786 psi | 89% | 2999 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 62,540 psi | 90% | 3258 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 60,655 psi | 87% | 3192 fps | 99.6% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 60,655 psi | 87% | 3192 fps | 99.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 59,393 psi | 85% | 3081 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 59,698 psi | 86% | 3110 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 60,046 psi | 86% | 3199 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 62,062 psi | 89% | 3225 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 59,756 psi | 86% | 3186 fps | 99.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,258 psi | 77% | 3136 fps | 99.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,241 psi | 72% | 3058 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,801 psi | 63% | 2992 fps | 99.8% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 58,102 psi | 83% | 3264 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 61,351 psi | 88% | 3130 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,791 psi | 70% | 3058 fps | 98.3% |
| Bofors RP3 | <<locked>> | 88% | 60,539 psi | 87% | 3100 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,258 psi | 77% | 3136 fps | 99.1% |
| Bofors RP7 | <<locked>> | 92% | 59,654 psi | 86% | 3094 fps | 99.8% |
| Hodgdon Benchmark | <<locked>> | 82% | 60,539 psi | 87% | 3015 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 59,915 psi | 86% | 3084 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 43,627 psi | 63% | 2920 fps | 96.4% |
| Hodgdon H380 | <<locked>> | 88% | 61,032 psi | 88% | 3127 fps | 100% |
| Hodgdon H414 | <<locked>> | 94% | 61,946 psi | 89% | 3205 fps | 100% |
| Hodgdon H4350 | <<locked>> | 92% | 61,438 psi | 88% | 3159 fps | 99.7% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 58,421 psi | 84% | 3133 fps | 98.1% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 57,174 psi | 82% | 3117 fps | 97.9% |
| Hodgdon H4895 | <<locked>> | 84% | 61,728 psi | 89% | 3117 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 60,582 psi | 87% | 3107 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 62,468 psi | 90% | 3156 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 42,873 psi | 62% | 3028 fps | 97.9% |
| Hodgdon Superformance | <<locked>> | 92% | 58,639 psi | 84% | 3192 fps | 99.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,376 psi | 52% | 1890 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 62,859 psi | 90% | 3114 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 62,656 psi | 90% | 3081 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 61,743 psi | 89% | 3091 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 60,829 psi | 87% | 3084 fps | 99.9% |
| IMR 4350 | <<locked>> | 96% | 60,684 psi | 87% | 3123 fps | 99.9% |
| IMR 4451 Enduron | <<locked>> | 92% | 61,395 psi | 88% | 3120 fps | 100% |
| IMR 4831 | <<locked>> | 96% | 59,857 psi | 86% | 3130 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 61,279 psi | 88% | 3136 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 59,872 psi | 86% | 3120 fps | 98.4% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,837 psi | 74% | 3107 fps | 97.8% |
| IMR 8208 XBR | <<locked>> | 82% | 59,509 psi | 85% | 3045 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 61,902 psi | 89% | 3071 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 59,524 psi | 86% | 3022 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 61,917 psi | 89% | 3081 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 61,351 psi | 88% | 3110 fps | 100% |
| Lovex S070 | <<locked>> | 96% | 62,975 psi | 90% | 3156 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,454 psi | 64% | 2890 fps | 99.3% |
| Norma 201 | <<locked>> | 84% | 59,596 psi | 86% | 3045 fps | 100% |
| Norma 202 | <<locked>> | 84% | 60,394 psi | 87% | 3035 fps | 100% |
| Norma 203B | <<locked>> | 88% | 62,801 psi | 90% | 3146 fps | 100% |
| Norma 204 | <<locked>> | 96% | 62,105 psi | 89% | 3189 fps | 99.6% |
| Norma MRPᴾ | <<locked>> | 100% | 56,724 psi | 81% | 3222 fps | 99.9% |
| Norma URP | <<locked>> | 96% | 61,757 psi | 89% | 3179 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 60,176 psi | 86% | 3123 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,098 psi | 75% | 3120 fps | 98.1% |
| Ramshot Hunter | <<locked>> | 96% | 60,669 psi | 87% | 3189 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,528 psi | 67% | 2989 fps | 98.6% |
| Ramshot TAC | <<locked>> | 82% | 59,843 psi | 86% | 3084 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 82% | 60,060 psi | 86% | 3094 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,999 psi | 53% | 1936 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 60,901 psi | 87% | 3110 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 61,105 psi | 88% | 3186 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 61,525 psi | 88% | 3215 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 59,480 psi | 85% | 3169 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 62,381 psi | 90% | 3264 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,859 psi | 62% | 3022 fps | 98.8% |
| Rottweil R 901 | <<locked>> | 82% | 60,249 psi | 87% | 3012 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 60,249 psi | 87% | 3041 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 60,539 psi | 87% | 3094 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 62,279 psi | 89% | 3159 fps | 99% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 59,103 psi | 85% | 3169 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 92% | 59,654 psi | 86% | 3094 fps | 99.8% |
| Shooters World Long Rifle | <<locked>> | 94% | 61,351 psi | 88% | 3110 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 84% | 61,902 psi | 89% | 3071 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 61,917 psi | 89% | 3081 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 62,975 psi | 90% | 3156 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 62,395 psi | 90% | 3159 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 62,903 psi | 90% | 3117 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 59,451 psi | 85% | 3077 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 60,379 psi | 87% | 2959 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 61,322 psi | 88% | 2956 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 61,554 psi | 88% | 3064 fps | 100% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 58,595 psi | 84% | 3166 fps | 99.5% |
| Somchem S335 | <<locked>> | 84% | 60,002 psi | 86% | 2956 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 62,439 psi | 90% | 3094 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 60,234 psi | 87% | 3087 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 60,684 psi | 87% | 3094 fps | 98.3% |
| Somchem S365 | <<locked>> | 98% | 61,351 psi | 88% | 3173 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 59,727 psi | 86% | 3136 fps | 99.8% |
| Vihtavuori N133 | <<locked>> | 84% | 60,843 psi | 87% | 2936 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 60,742 psi | 87% | 2989 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 61,090 psi | 88% | 3009 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 61,975 psi | 89% | 3054 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 60,350 psi | 87% | 3114 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,663 psi | 74% | 2999 fps | 99% |
| Vihtavuori N530 | <<locked>> | 82% | 60,176 psi | 86% | 3045 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 59,248 psi | 85% | 3012 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 59,335 psi | 85% | 3127 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 56,231 psi | 81% | 3136 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 57,043 psi | 82% | 3212 fps | 98.3% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 45,266 psi | 65% | 2995 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 60,437 psi | 87% | 3077 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 61,119 psi | 88% | 3097 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 62,091 psi | 89% | 3205 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,484 psi | 65% | 3127 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 59,770 psi | 86% | 3084 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 56,188 psi | 81% | 3077 fps | 99.1% |
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 2015 | <<locked>> | 80% | 57,899 psi | 83% | 2923 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 51,155 psi | 73% | 2867 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,878 psi | 70% | 2877 fps | 98.6% |
| Accurate 3100 | <<locked>> | 84% | 30,966 psi | 44% | 2595 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 48,414 psi | 70% | 2877 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,811 psi | 53% | 2756 fps | 99% |
| Accurate High Country | <<locked>> | 90% | 41,234 psi | 59% | 2946 fps | 95.6% |
| Accurate MAGPRO | <<locked>> | 94% | 44,991 psi | 65% | 3002 fps | 95.1% |
| ADI APS 450 | <<locked>> | 80% | 58,378 psi | 84% | 2329 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 53,795 psi | 77% | 3005 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 45,687 psi | 66% | 2858 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 38,334 psi | 55% | 2792 fps | 95.3% |
| ADI AR 2213 | <<locked>> | 94% | 44,469 psi | 64% | 2953 fps | 95.8% |
| ADI AR 2225 | <<locked>> | 98% | 32,808 psi | 47% | 2720 fps | 95% |
| ADI Benchmark 8208 | <<locked>> | 80% | 55,898 psi | 80% | 2995 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 57,812 psi | 83% | 2953 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,386 psi | 72% | 3081 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 38,421 psi | 55% | 2795 fps | 95.5% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 38,421 psi | 55% | 2795 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,238 psi | 66% | 2884 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,327 psi | 71% | 2953 fps | 100% |
| Alliant Reloder-16 | 85.7 gr | 80% | 35,926 psi | 52% | 2766 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,727 psi | 59% | 2894 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 38,014 psi | 55% | 2785 fps | 95.4% |
| Alliant Reloder-22 | <<locked>> | 90% | 38,130 psi | 55% | 2838 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,368 psi | 38% | 2520 fps | 97.5% |
| Alliant Reloder-25 | <<locked>> | 88% | 29,950 psi | 43% | 2638 fps | 95.8% |
| Alliant Reloder-26 | <<locked>> | 80% | 28,050 psi | 40% | 2631 fps | 95.9% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 53,693 psi | 77% | 3025 fps | 100% |
| Bofors RP15 | <<locked>> | 92% | 37,637 psi | 54% | 2825 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 46,557 psi | 67% | 2897 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 38,130 psi | 55% | 2838 fps | 95.7% |
| Bofors RP7 | <<locked>> | 80% | 40,988 psi | 59% | 2766 fps | 97.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 57,101 psi | 82% | 2969 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 55,956 psi | 80% | 3028 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 40,799 psi | 59% | 2858 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 46,876 psi | 67% | 2907 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 38,798 psi | 56% | 2802 fps | 97.4% |
| Hodgdon H4350 | <<locked>> | 80% | 41,785 psi | 60% | 2822 fps | 96.8% |
| Hodgdon H4831 | <<locked>> | 92% | 44,585 psi | 64% | 2900 fps | 95.2% |
| Hodgdon H4831 SC | <<locked>> | 94% | 46,644 psi | 67% | 2940 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 54,404 psi | 78% | 3015 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,431 psi | 48% | 2651 fps | 99.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,068 psi | 73% | 2999 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 37,710 psi | 54% | 2900 fps | 96% |
| Hodgdon Superformance | 97.6 gr | 80% | 37,869 psi | 54% | 2812 fps | 96.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,180 psi | 39% | 1693 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,982 psi | 75% | 2963 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 54,984 psi | 79% | 2982 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,051 psi | 69% | 2890 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,430 psi | 72% | 2923 fps | 99.3% |
| IMR 4350 | <<locked>> | 80% | 36,622 psi | 53% | 2690 fps | 96% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,308 psi | 61% | 2799 fps | 97.9% |
| IMR 4831 | <<locked>> | 80% | 35,418 psi | 51% | 2703 fps | 98.8% |
| IMR 4895 | <<locked>> | 80% | 50,589 psi | 73% | 2982 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 43,743 psi | 63% | 2844 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 94% | 42,337 psi | 61% | 2920 fps | 95.3% |
| IMR 8208 XBR | <<locked>> | 80% | 55,898 psi | 80% | 2995 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 54,215 psi | 78% | 2972 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 52,692 psi | 76% | 2923 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,312 psi | 69% | 2887 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,900 psi | 57% | 2749 fps | 98.6% |
| Lovex S070 | <<locked>> | 80% | 38,072 psi | 55% | 2726 fps | 97.3% |
| Lovex S071 | <<locked>> | 88% | 30,095 psi | 43% | 2569 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 52,634 psi | 76% | 2946 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,287 psi | 77% | 2940 fps | 100% |
| Norma 203B | <<locked>> | 80% | 48,675 psi | 70% | 2940 fps | 100% |
| Norma 204 | <<locked>> | 82% | 38,522 psi | 55% | 2776 fps | 95.3% |
| Norma MRP | <<locked>> | 84% | 32,518 psi | 47% | 2726 fps | 95.1% |
| Norma URP | <<locked>> | 80% | 36,608 psi | 53% | 2749 fps | 98.9% |
| Ramshot Big Game | <<locked>> | 80% | 48,950 psi | 70% | 2959 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 42,105 psi | 60% | 2927 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 35,592 psi | 51% | 2736 fps | 97.3% |
| Ramshot Magnum | <<locked>> | 92% | 34,853 psi | 50% | 2736 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 56,028 psi | 80% | 3028 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 80% | 56,144 psi | 81% | 3041 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,586 psi | 40% | 1732 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,862 psi | 67% | 2890 fps | 99.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 53,388 psi | 77% | 3074 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,250 psi | 62% | 2943 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,550 psi | 53% | 2772 fps | 98.8% |
| ReloadSwiss RS 70 | 93.7 gr | 80% | 35,578 psi | 51% | 2782 fps | 98.4% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 34,751 psi | 50% | 2815 fps | 96% |
| Rottweil R 901 | <<locked>> | 80% | 56,739 psi | 82% | 2966 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 50,038 psi | 72% | 2897 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,729 psi | 63% | 2838 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 42,395 psi | 61% | 2825 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 86% | 36,985 psi | 53% | 2766 fps | 95.3% |
| Rottweil R 907 | <<locked>> | 80% | 40,988 psi | 59% | 2766 fps | 97.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,900 psi | 57% | 2749 fps | 98.6% |
| Shooters World Match Rifle | <<locked>> | 80% | 54,215 psi | 78% | 2972 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 48,312 psi | 69% | 2887 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,072 psi | 55% | 2726 fps | 97.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,904 psi | 65% | 2897 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 54,897 psi | 79% | 3009 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,330 psi | 75% | 2976 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,330 psi | 77% | 2867 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,092 psi | 65% | 2736 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,059 psi | 56% | 2687 fps | 97.3% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 36,637 psi | 53% | 2762 fps | 95.2% |
| Somchem S335 | <<locked>> | 80% | 53,185 psi | 76% | 2867 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 54,607 psi | 78% | 2989 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,121 psi | 63% | 2841 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 46,485 psi | 67% | 2867 fps | 95.6% |
| Somchem S365 | <<locked>> | 80% | 33,098 psi | 48% | 2707 fps | 100% |
| Somchem S385 | <<locked>> | 84% | 35,244 psi | 51% | 2694 fps | 95.6% |
| Vihtavuori N133 | <<locked>> | 80% | 53,853 psi | 77% | 2848 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 50,285 psi | 72% | 2851 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,488 psi | 73% | 2867 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,047 psi | 60% | 2762 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 38,029 psi | 55% | 2746 fps | 99.1% |
| Vihtavuori N165 | <<locked>> | 90% | 37,043 psi | 53% | 2723 fps | 95.8% |
| Vihtavuori N530 | <<locked>> | 80% | 56,391 psi | 81% | 2995 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 48,834 psi | 70% | 2867 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,536 psi | 54% | 2749 fps | 98.9% |
| Vihtavuori N555 | <<locked>> | 80% | 28,906 psi | 42% | 2598 fps | 97.5% |
| Vihtavuori N560 | <<locked>> | 92% | 43,366 psi | 62% | 2963 fps | 95.2% |
| Vihtavuori N565 | <<locked>> | 98% | 42,177 psi | 61% | 2933 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,289 psi | 54% | 2710 fps | 100% |
| Winchester 748 | <<locked>> | 80% | 57,116 psi | 82% | 3045 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 38,899 psi | 56% | 2805 fps | 97.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 23,293 psi | 33% | 2490 fps | 96.5% |
| Winchester StaBALL Match | <<locked>> | 80% | 52,373 psi | 75% | 2982 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 88% | 36,985 psi | 53% | 2726 fps | 95% |
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 124 powders for 37 XC loaded with the .375 | 248gr | Hammer Hammer Hunter. Alliant Reloder-26 delivers the highest muzzle velocity at 3,264 fps; across all powders the maximum-charge window runs from 1,890 fps to 3,264 fps. Accurate 3100 gives the best case fill at 100 %, and 124 of the 124 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 248.0 gr projectile in 0.375" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, Accurate MAGPRO 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. ReloadSwiss RS 70, Hodgdon Superformance, Alliant Reloder-16 rank at the top here: for 37 XC with the .375 | 248gr | Hammer Hammer Hunter 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.