Load Specifications
Bullet:.375 | 240gr | Atomic 29 HP
Bullet Manufacturer:Atomic 29
Bullet Weight:240 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 | 240gr | Atomic 29 HP 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% | 60,510 psi | 87% | 3018 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 60,611 psi | 87% | 3054 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 62,308 psi | 90% | 3130 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 62,888 psi | 90% | 3150 fps | 99.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 52,562 psi | 76% | 3081 fps | 99.9% |
| Accurate 4064 | <<locked>> | 88% | 60,945 psi | 88% | 3114 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 62,845 psi | 90% | 3248 fps | 100% |
| Accurate High Countryᴾ | <<locked>> | 100% | 57,986 psi | 83% | 3307 fps | 98.9% |
| Accurate MAGPROᴾ | <<locked>> | 100% | 54,984 psi | 79% | 3238 fps | 97.3% |
| ADI APS 450 | <<locked>> | 84% | 62,424 psi | 90% | 2438 fps | 100% |
| ADI AR 2206H | <<locked>> | 84% | 60,147 psi | 86% | 3159 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 61,453 psi | 88% | 3159 fps | 100% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 59,959 psi | 86% | 3248 fps | 99.5% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 53,766 psi | 77% | 3182 fps | 97.9% |
| ADI Benchmark 8208 | <<locked>> | 84% | 62,569 psi | 90% | 3146 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 60,800 psi | 87% | 3051 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 61,714 psi | 89% | 3310 fps | 100% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 60,075 psi | 86% | 3245 fps | 99.5% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 60,075 psi | 86% | 3245 fps | 99.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 62,439 psi | 90% | 3182 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 62,816 psi | 90% | 3215 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 96% | 59,466 psi | 85% | 3251 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 92% | 61,467 psi | 88% | 3278 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 59,176 psi | 85% | 3235 fps | 99.4% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,489 psi | 75% | 3179 fps | 98.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,429 psi | 71% | 3100 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,917 psi | 62% | 3028 fps | 99.6% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 57,421 psi | 82% | 3314 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 60,742 psi | 87% | 3182 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 47,921 psi | 69% | 3097 fps | 98% |
| Bofors RP3 | <<locked>> | 88% | 59,480 psi | 85% | 3146 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,489 psi | 75% | 3179 fps | 98.9% |
| Bofors RP7 | <<locked>> | 94% | 62,772 psi | 90% | 3199 fps | 99.9% |
| Hodgdon Benchmark | <<locked>> | 82% | 59,843 psi | 86% | 3068 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 58,972 psi | 85% | 3130 fps | 100% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 42,844 psi | 62% | 2956 fps | 96% |
| Hodgdon H380 | <<locked>> | 88% | 60,104 psi | 86% | 3176 fps | 100% |
| Hodgdon H414 | <<locked>> | 94% | 61,105 psi | 88% | 3251 fps | 100% |
| Hodgdon H4350 | <<locked>> | 92% | 60,713 psi | 87% | 3209 fps | 99.6% |
| Hodgdon H4831ᴾ | <<locked>> | 100% | 57,725 psi | 83% | 3179 fps | 97.9% |
| Hodgdon H4831 SCᴾ | <<locked>> | 100% | 56,521 psi | 81% | 3163 fps | 97.7% |
| Hodgdon H4895 | <<locked>> | 84% | 60,829 psi | 87% | 3166 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 59,843 psi | 86% | 3159 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 61,685 psi | 89% | 3205 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 42,076 psi | 60% | 3064 fps | 97.5% |
| Hodgdon Superformance | <<locked>> | 94% | 62,468 psi | 90% | 3304 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,143 psi | 52% | 1932 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 62,221 psi | 89% | 3169 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 61,714 psi | 89% | 3133 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 60,858 psi | 87% | 3143 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 60,118 psi | 86% | 3133 fps | 99.9% |
| IMR 4350 | <<locked>> | 96% | 60,017 psi | 86% | 3176 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 92% | 60,669 psi | 87% | 3169 fps | 99.9% |
| IMR 4831 | <<locked>> | 96% | 58,972 psi | 85% | 3176 fps | 100% |
| IMR 4895 | <<locked>> | 86% | 60,408 psi | 87% | 3189 fps | 100% |
| IMR 4955 Enduronᴾ | <<locked>> | 100% | 59,132 psi | 85% | 3166 fps | 98.2% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,184 psi | 74% | 3150 fps | 97.5% |
| IMR 8208 XBR | <<locked>> | 84% | 62,569 psi | 90% | 3146 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 60,814 psi | 87% | 3120 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 62,482 psi | 90% | 3123 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 60,872 psi | 87% | 3130 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 60,510 psi | 87% | 3156 fps | 100% |
| Lovex S070 | <<locked>> | 96% | 62,105 psi | 89% | 3205 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,308 psi | 62% | 2923 fps | 99.1% |
| Norma 201 | <<locked>> | 86% | 62,424 psi | 90% | 3143 fps | 100% |
| Norma 202 | <<locked>> | 84% | 59,553 psi | 86% | 3087 fps | 100% |
| Norma 203B | <<locked>> | 88% | 62,047 psi | 89% | 3196 fps | 100% |
| Norma 204 | <<locked>> | 96% | 61,569 psi | 88% | 3241 fps | 99.5% |
| Norma MRPᴾ | <<locked>> | 100% | 55,970 psi | 80% | 3268 fps | 99.9% |
| Norma URP | <<locked>> | 96% | 61,017 psi | 88% | 3228 fps | 100% |
| Ramshot Big Game | <<locked>> | 86% | 59,277 psi | 85% | 3169 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 51,372 psi | 74% | 3163 fps | 97.9% |
| Ramshot Hunter | <<locked>> | 96% | 60,075 psi | 86% | 3238 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 45,629 psi | 66% | 3028 fps | 98.3% |
| Ramshot TAC | <<locked>> | 82% | 59,030 psi | 85% | 3133 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 82% | 59,248 psi | 85% | 3146 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,695 psi | 53% | 1978 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 60,205 psi | 86% | 3159 fps | 100% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 60,263 psi | 87% | 3238 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 60,858 psi | 87% | 3268 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 62,917 psi | 90% | 3271 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 61,641 psi | 89% | 3314 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,018 psi | 60% | 3054 fps | 98.5% |
| Rottweil R 901 | <<locked>> | 84% | 62,772 psi | 90% | 3107 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 59,248 psi | 85% | 3091 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 59,509 psi | 85% | 3143 fps | 100% |
| Rottweil R 904ᴾ | <<locked>> | 100% | 61,786 psi | 89% | 3212 fps | 98.9% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 58,291 psi | 84% | 3215 fps | 99.4% |
| Rottweil R 907 | <<locked>> | 94% | 62,772 psi | 90% | 3199 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 94% | 60,510 psi | 87% | 3156 fps | 100% |
| Shooters World Match Rifle | <<locked>> | 84% | 60,814 psi | 87% | 3120 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 60,872 psi | 87% | 3130 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 62,105 psi | 89% | 3205 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 61,612 psi | 89% | 3209 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 62,134 psi | 89% | 3169 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 62,729 psi | 90% | 3182 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 59,466 psi | 85% | 3009 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 60,698 psi | 87% | 3009 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 60,785 psi | 87% | 3114 fps | 99.9% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 57,783 psi | 83% | 3212 fps | 99.4% |
| Somchem S335 | <<locked>> | 86% | 62,903 psi | 90% | 3051 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 61,830 psi | 89% | 3146 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 59,393 psi | 85% | 3140 fps | 100% |
| Somchem S361 | <<locked>> | 98% | 59,944 psi | 86% | 3143 fps | 98.1% |
| Somchem S365 | <<locked>> | 98% | 60,582 psi | 87% | 3222 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 58,929 psi | 85% | 3186 fps | 99.8% |
| Vihtavuori N130 | <<locked>> | 82% | 62,540 psi | 90% | 3005 fps | 100% |
| Vihtavuori N133 | <<locked>> | 84% | 60,017 psi | 86% | 2986 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 59,727 psi | 86% | 3038 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 60,205 psi | 86% | 3058 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 61,206 psi | 88% | 3104 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 59,625 psi | 86% | 3166 fps | 100% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,952 psi | 73% | 3045 fps | 98.8% |
| Vihtavuori N530 | <<locked>> | 82% | 59,422 psi | 85% | 3097 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 62,178 psi | 89% | 3110 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 62,569 psi | 90% | 3228 fps | 100% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 55,201 psi | 79% | 3179 fps | 100% |
| Vihtavuori N560ᴾ | <<locked>> | 100% | 56,304 psi | 81% | 3258 fps | 98.1% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 59,799 psi | 86% | 3127 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 60,321 psi | 87% | 3150 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 61,467 psi | 88% | 3258 fps | 100% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 44,628 psi | 64% | 3169 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 84% | 59,059 psi | 85% | 3136 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 55,405 psi | 80% | 3123 fps | 99% |
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% | 56,782 psi | 82% | 2969 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 49,588 psi | 71% | 2907 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 58,160 psi | 84% | 3077 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,022 psi | 69% | 2920 fps | 98.4% |
| Accurate 3100 | <<locked>> | 84% | 29,747 psi | 43% | 2612 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 46,978 psi | 67% | 2917 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,650 psi | 51% | 2782 fps | 98.7% |
| Accurate High Country | <<locked>> | 90% | 40,350 psi | 58% | 2979 fps | 95.1% |
| Accurate MAGPRO | <<locked>> | 96% | 47,500 psi | 68% | 3107 fps | 95.7% |
| ADI APS 450 | <<locked>> | 80% | 58,320 psi | 84% | 2379 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 52,982 psi | 76% | 3054 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 44,933 psi | 65% | 2900 fps | 100% |
| ADI AR 2209 | <<locked>> | 88% | 40,103 psi | 58% | 2887 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 94% | 43,714 psi | 63% | 2989 fps | 95.4% |
| ADI Benchmark 8208 | <<locked>> | 80% | 55,143 psi | 79% | 3045 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 56,898 psi | 82% | 3002 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,705 psi | 71% | 3130 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 37,608 psi | 54% | 2828 fps | 95% |
| Alliant Power Pro Varmint | <<locked>> | 86% | 37,608 psi | 54% | 2828 fps | 95% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,223 psi | 65% | 2927 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,428 psi | 70% | 2999 fps | 100% |
| Alliant Reloder-16 | 88.3 gr | 80% | 35,085 psi | 50% | 2799 fps | 98.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,827 psi | 57% | 2930 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 39,798 psi | 57% | 2881 fps | 95.9% |
| Alliant Reloder-22 | <<locked>> | 90% | 37,202 psi | 53% | 2867 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 25,396 psi | 36% | 2536 fps | 96.8% |
| Alliant Reloder-25 | <<locked>> | 88% | 29,022 psi | 42% | 2657 fps | 95.1% |
| Alliant Reloder-26 | <<locked>> | 80% | 27,050 psi | 39% | 2648 fps | 95.1% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 52,953 psi | 76% | 3071 fps | 100% |
| Bofors RP15 | <<locked>> | 94% | 39,291 psi | 56% | 2917 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 45,397 psi | 65% | 2936 fps | 100% |
| Bofors RP5 | <<locked>> | 90% | 37,202 psi | 53% | 2867 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 40,016 psi | 57% | 2802 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 80% | 56,304 psi | 81% | 3018 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 55,085 psi | 79% | 3077 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 39,987 psi | 57% | 2890 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 45,977 psi | 66% | 2949 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 80% | 37,956 psi | 55% | 2838 fps | 97% |
| Hodgdon H4350 | <<locked>> | 80% | 40,973 psi | 59% | 2858 fps | 96.4% |
| Hodgdon H4831 | <<locked>> | 94% | 46,891 psi | 67% | 2999 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 94% | 45,919 psi | 66% | 2979 fps | 95.4% |
| Hodgdon H4895 | <<locked>> | 80% | 53,563 psi | 77% | 3061 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,503 psi | 47% | 2684 fps | 99.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,227 psi | 72% | 3045 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 96% | 36,796 psi | 53% | 2927 fps | 95.4% |
| Hodgdon Superformance | 100.5 gr | 80% | 36,927 psi | 53% | 2844 fps | 96.3% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,963 psi | 39% | 1732 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 51,271 psi | 74% | 3012 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 54,085 psi | 78% | 3031 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,210 psi | 68% | 2933 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,676 psi | 71% | 2969 fps | 99.1% |
| IMR 4350 | <<locked>> | 80% | 35,824 psi | 51% | 2726 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,597 psi | 60% | 2838 fps | 97.7% |
| IMR 4831 | <<locked>> | 80% | 34,418 psi | 49% | 2736 fps | 98.5% |
| IMR 4895 | <<locked>> | 80% | 49,690 psi | 71% | 3028 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 45,774 psi | 66% | 2936 fps | 95.5% |
| IMR 7828 SSC | <<locked>> | 96% | 44,541 psi | 64% | 3022 fps | 95.8% |
| IMR 8208 XBR | <<locked>> | 80% | 55,143 psi | 79% | 3045 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 53,055 psi | 76% | 3018 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 51,938 psi | 75% | 2972 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 47,282 psi | 68% | 2930 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,914 psi | 56% | 2782 fps | 98.3% |
| Lovex S070 | <<locked>> | 80% | 37,130 psi | 53% | 2762 fps | 96.9% |
| Lovex S071 | <<locked>> | 90% | 31,009 psi | 45% | 2648 fps | 95.7% |
| Norma 201 | <<locked>> | 80% | 51,547 psi | 74% | 2989 fps | 100% |
| Norma 202 | <<locked>> | 80% | 52,344 psi | 75% | 2986 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,790 psi | 69% | 2982 fps | 100% |
| Norma 204 | <<locked>> | 84% | 40,466 psi | 58% | 2874 fps | 95.8% |
| Norma MRP | <<locked>> | 86% | 33,895 psi | 49% | 2815 fps | 95.5% |
| Norma URP | <<locked>> | 80% | 35,723 psi | 51% | 2782 fps | 98.6% |
| Ramshot Big Game | <<locked>> | 80% | 48,196 psi | 69% | 3005 fps | 100% |
| Ramshot Grand | <<locked>> | 94% | 41,307 psi | 59% | 2959 fps | 95.1% |
| Ramshot Hunter | <<locked>> | 80% | 34,635 psi | 50% | 2766 fps | 96.8% |
| Ramshot Magnum | <<locked>> | 94% | 36,564 psi | 53% | 2831 fps | 95.7% |
| Ramshot TAC | <<locked>> | 80% | 55,259 psi | 79% | 3077 fps | 100% |
| Ramshot Wild Boar | <<locked>> | 80% | 55,376 psi | 80% | 3091 fps | 100% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,296 psi | 39% | 1772 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,021 psi | 66% | 2930 fps | 99% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 52,344 psi | 75% | 3120 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,409 psi | 61% | 2986 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,534 psi | 51% | 2802 fps | 98.5% |
| ReloadSwiss RS 70 | 96.6 gr | 80% | 34,766 psi | 50% | 2812 fps | 98% |
| ReloadSwiss RS 76 | <<locked>> | 94% | 33,881 psi | 49% | 2838 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 55,608 psi | 80% | 3012 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 49,052 psi | 70% | 2940 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,641 psi | 61% | 2877 fps | 100% |
| Rottweil R 904 | <<locked>> | 88% | 41,582 psi | 60% | 2861 fps | 95% |
| Rottweil R 905 | <<locked>> | 88% | 38,624 psi | 55% | 2858 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 40,016 psi | 57% | 2802 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,914 psi | 56% | 2782 fps | 98.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 53,055 psi | 76% | 3018 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 47,282 psi | 68% | 2930 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,130 psi | 53% | 2762 fps | 96.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,961 psi | 63% | 2936 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 53,998 psi | 78% | 3054 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,430 psi | 74% | 3022 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 52,605 psi | 76% | 2917 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,353 psi | 64% | 2779 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,101 psi | 55% | 2720 fps | 97% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 38,261 psi | 55% | 2851 fps | 95.6% |
| Somchem S335 | <<locked>> | 80% | 52,228 psi | 75% | 2913 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 53,838 psi | 77% | 3038 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 43,076 psi | 62% | 2877 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 45,701 psi | 66% | 2907 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 32,126 psi | 46% | 2733 fps | 99.9% |
| Somchem S385 | <<locked>> | 84% | 34,316 psi | 49% | 2723 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 58,929 psi | 85% | 2959 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 53,185 psi | 76% | 2897 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 49,385 psi | 71% | 2900 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,690 psi | 71% | 2913 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,176 psi | 59% | 2802 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,159 psi | 53% | 2779 fps | 98.8% |
| Vihtavuori N165 | <<locked>> | 90% | 36,143 psi | 52% | 2756 fps | 95.3% |
| Vihtavuori N530 | <<locked>> | 80% | 55,550 psi | 80% | 3045 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 48,037 psi | 69% | 2913 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,637 psi | 53% | 2782 fps | 98.6% |
| Vihtavuori N555 | <<locked>> | 80% | 27,746 psi | 40% | 2615 fps | 96.8% |
| Vihtavuori N560 | <<locked>> | 94% | 45,600 psi | 66% | 3064 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,492 psi | 52% | 2746 fps | 99.9% |
| Winchester 748 | <<locked>> | 80% | 56,289 psi | 81% | 3094 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 38,072 psi | 55% | 2841 fps | 97% |
| Winchester StaBALL HD | <<locked>> | 80% | 22,292 psi | 32% | 2493 fps | 95.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 51,517 psi | 74% | 3028 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 90% | 38,827 psi | 56% | 2822 fps | 95.5% |
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 | 240gr | Atomic 29 HP. Alliant Reloder-26 delivers the highest muzzle velocity at 3,314 fps; across all powders the maximum-charge window runs from 1,932 fps to 3,314 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 52–90 %, leaving at least 10 % headroom. The 240.0 gr projectile in 0.375" calls for a 1:6.0 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 | 240gr | Atomic 29 HP 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.