Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 138gr | Hasler ARIETE bullet and 87 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Alliant Reloder-17 and Hodgdon H414.
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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 54,578 psi | 86% | 3159 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 56,492 psi | 89% | 3232 fps | 98.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 55,013 psi | 86% | 3268 fps | 99.2% |
| Accurate 4064 | <<locked>> | 84% | 55,201 psi | 87% | 3219 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 56,710 psi | 89% | 3330 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 86% | 55,854 psi | 88% | 3261 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 54,418 psi | 85% | 3310 fps | 97% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 55,869 psi | 88% | 3363 fps | 96% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 55,419 psi | 87% | 3389 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 56,623 psi | 89% | 3281 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 56,681 psi | 89% | 3304 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 57,624 psi | 90% | 3396 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 55,317 psi | 87% | 3360 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 57,566 psi | 90% | 3363 fps | 97.7% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 54,853 psi | 86% | 3356 fps | 97.4% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 51,721 psi | 81% | 3284 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 44,918 psi | 70% | 3186 fps | 98.3% |
| Alliant Reloder-26 | <<locked>> | 98% | 56,144 psi | 88% | 3442 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 50,198 psi | 79% | 3264 fps | 96.1% |
| Bofors RP3 | <<locked>> | 86% | 57,537 psi | 90% | 3301 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 54,853 psi | 86% | 3356 fps | 97.4% |
| Bofors RP7 | <<locked>> | 90% | 56,782 psi | 89% | 3278 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 84% | 54,244 psi | 85% | 3255 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 90% | 55,477 psi | 87% | 3327 fps | 98.6% |
| Hodgdon H4350 | <<locked>> | 88% | 54,998 psi | 86% | 3281 fps | 97.5% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 54,346 psi | 85% | 3255 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 55,521 psi | 87% | 3297 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 56,159 psi | 88% | 3366 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,114 psi | 57% | 2100 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 56,130 psi | 88% | 3264 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 55,056 psi | 86% | 3238 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 54,331 psi | 85% | 3215 fps | 98.4% |
| IMR 4350 | <<locked>> | 92% | 54,636 psi | 86% | 3251 fps | 98.1% |
| IMR 4451 Enduron | <<locked>> | 88% | 55,114 psi | 86% | 3248 fps | 98.4% |
| IMR 4831 | <<locked>> | 94% | 57,319 psi | 90% | 3323 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 54,491 psi | 85% | 3278 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 98% | 57,537 psi | 90% | 3297 fps | 95.9% |
| Lovex S060 | <<locked>> | 82% | 56,521 psi | 89% | 3228 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 55,259 psi | 87% | 3232 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 55,129 psi | 86% | 3245 fps | 99.3% |
| Lovex S070 | <<locked>> | 92% | 56,449 psi | 88% | 3287 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 45,324 psi | 71% | 3084 fps | 97.5% |
| Norma 201 | <<locked>> | 82% | 56,333 psi | 88% | 3245 fps | 100% |
| Norma 202 | <<locked>> | 82% | 57,232 psi | 90% | 3245 fps | 100% |
| Norma 203B | <<locked>> | 84% | 55,970 psi | 88% | 3287 fps | 100% |
| Norma 204 | <<locked>> | 92% | 55,419 psi | 87% | 3304 fps | 97.1% |
| Norma MRP | <<locked>> | 98% | 54,607 psi | 86% | 3383 fps | 98.5% |
| Norma URP | <<locked>> | 92% | 55,405 psi | 87% | 3314 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 57,305 psi | 90% | 3320 fps | 100% |
| Ramshot Hunter | <<locked>> | 92% | 54,389 psi | 85% | 3307 fps | 99.1% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 47,921 psi | 75% | 3196 fps | 96.5% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,753 psi | 58% | 2149 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 54,259 psi | 85% | 3235 fps | 98.8% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 54,679 psi | 86% | 3356 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 56,985 psi | 89% | 3353 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 55,709 psi | 87% | 3386 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 57,058 psi | 89% | 3248 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 57,595 psi | 90% | 3294 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 55,985 psi | 88% | 3281 fps | 96.2% |
| Rottweil R 905 | <<locked>> | 98% | 56,710 psi | 89% | 3346 fps | 97.7% |
| Rottweil R 907 | <<locked>> | 90% | 56,782 psi | 89% | 3278 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 55,129 psi | 86% | 3245 fps | 99.3% |
| Shooters World Precision | <<locked>> | 84% | 55,259 psi | 87% | 3232 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 56,449 psi | 88% | 3287 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 55,840 psi | 88% | 3301 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 56,681 psi | 89% | 3278 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 57,188 psi | 90% | 3173 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,897 psi | 86% | 3120 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,766 psi | 86% | 3189 fps | 98.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 56,231 psi | 88% | 3340 fps | 97.6% |
| Somchem S335 | <<locked>> | 82% | 56,855 psi | 89% | 3166 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 57,392 psi | 90% | 3287 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 55,013 psi | 86% | 3317 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 57,276 psi | 90% | 3317 fps | 98.4% |
| Vihtavuori N135 | <<locked>> | 84% | 57,522 psi | 90% | 3205 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 54,375 psi | 85% | 3163 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 55,376 psi | 87% | 3205 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 57,624 psi | 90% | 3310 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 53,098 psi | 83% | 3225 fps | 97.4% |
| Vihtavuori N540 | <<locked>> | 84% | 56,304 psi | 88% | 3212 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 56,739 psi | 89% | 3310 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 98% | 53,940 psi | 85% | 3314 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 53,824 psi | 84% | 3212 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 55,477 psi | 87% | 3327 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 47,181 psi | 74% | 3340 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 56,927 psi | 89% | 3284 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 53,911 psi | 84% | 3245 fps | 96.9% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 80% | 51,126 psi | 80% | 3104 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 49,429 psi | 77% | 3104 fps | 96.8% |
| Accurate 3100 | <<locked>> | 90% | 38,377 psi | 60% | 2930 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 48,457 psi | 76% | 3107 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,883 psi | 58% | 2923 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 80% | 46,064 psi | 72% | 3077 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 92% | 47,485 psi | 74% | 3173 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 98% | 52,141 psi | 82% | 3291 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 51,314 psi | 80% | 3314 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,601 psi | 73% | 3104 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,690 psi | 78% | 3179 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 36,230 psi | 57% | 2943 fps | 96.8% |
| Alliant Reloder-17 | 75.6 gr | 80% | 41,336 psi | 65% | 3091 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 92% | 46,978 psi | 74% | 3159 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 96% | 47,732 psi | 75% | 3219 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 84% | 30,023 psi | 47% | 2769 fps | 95.7% |
| Alliant Reloder-25 | <<locked>> | 94% | 36,724 psi | 58% | 2976 fps | 95.4% |
| Alliant Reloder-26 | 83.3 gr | 86% | 35,288 psi | 55% | 2979 fps | 95.6% |
| Bofors RP15 | <<locked>> | 98% | 46,862 psi | 73% | 3196 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 46,775 psi | 73% | 3110 fps | 99.9% |
| Bofors RP5 | <<locked>> | 96% | 47,732 psi | 75% | 3219 fps | 95.6% |
| Bofors RP7 | <<locked>> | 82% | 43,961 psi | 69% | 3025 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 47,282 psi | 74% | 3123 fps | 98.8% |
| Hodgdon H414 | 75.8 gr | 82% | 42,090 psi | 66% | 3054 fps | 95.5% |
| Hodgdon H4350 | <<locked>> | 82% | 45,005 psi | 71% | 3081 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,620 psi | 53% | 2822 fps | 97.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 51,967 psi | 81% | 3238 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 44,614 psi | 70% | 3136 fps | 96% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,992 psi | 42% | 1883 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 52,562 psi | 82% | 3205 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 48,399 psi | 76% | 3117 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,763 psi | 80% | 3146 fps | 97.8% |
| IMR 4350 | <<locked>> | 86% | 44,904 psi | 70% | 3058 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,714 psi | 67% | 2999 fps | 95.6% |
| IMR 4831 | <<locked>> | 80% | 35,636 psi | 56% | 2874 fps | 96.3% |
| IMR 4895 | <<locked>> | 80% | 51,024 psi | 80% | 3215 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 96% | 53,911 psi | 84% | 3232 fps | 95.1% |
| Lovex S060 | <<locked>> | 80% | 53,185 psi | 83% | 3169 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 48,617 psi | 76% | 3117 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 40,030 psi | 63% | 2936 fps | 96.3% |
| Lovex S070 | <<locked>> | 82% | 40,799 psi | 64% | 2969 fps | 95.4% |
| Lovex S071 | <<locked>> | 96% | 39,610 psi | 62% | 2959 fps | 95.9% |
| Norma 201 | <<locked>> | 80% | 52,953 psi | 83% | 3189 fps | 100% |
| Norma 202 | <<locked>> | 80% | 53,795 psi | 84% | 3189 fps | 100% |
| Norma 203B | <<locked>> | 80% | 49,052 psi | 77% | 3166 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 48,196 psi | 76% | 3166 fps | 95.3% |
| Norma MRP | <<locked>> | 92% | 43,903 psi | 69% | 3166 fps | 96% |
| Norma URP | <<locked>> | 80% | 36,956 psi | 58% | 2923 fps | 96.6% |
| Ramshot Big Game | <<locked>> | 80% | 49,661 psi | 78% | 3186 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 38,580 psi | 60% | 2972 fps | 95.3% |
| Ramshot Magnum | <<locked>> | 98% | 44,367 psi | 70% | 3120 fps | 95.4% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,340 psi | 43% | 1926 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 47,311 psi | 74% | 3100 fps | 97.6% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 44,005 psi | 69% | 3159 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,927 psi | 58% | 2943 fps | 96.3% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 35,911 psi | 56% | 2943 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 50,401 psi | 79% | 3133 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 44,019 psi | 69% | 3048 fps | 99.7% |
| Rottweil R 904 | <<locked>> | 94% | 52,562 psi | 82% | 3219 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 92% | 46,050 psi | 72% | 3143 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 82% | 43,961 psi | 69% | 3025 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 40,030 psi | 63% | 2936 fps | 96.3% |
| Shooters World Precision | <<locked>> | 80% | 48,617 psi | 76% | 3117 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 40,799 psi | 64% | 2969 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 45,440 psi | 71% | 3107 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 52,939 psi | 83% | 3215 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 53,650 psi | 84% | 3120 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 45,339 psi | 71% | 2966 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 41,945 psi | 66% | 2933 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 45,629 psi | 72% | 3133 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 53,563 psi | 84% | 3117 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 44,367 psi | 70% | 3048 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 33,388 psi | 52% | 2871 fps | 98.6% |
| Somchem S385 | <<locked>> | 90% | 43,613 psi | 68% | 3054 fps | 95.4% |
| Vihtavuori N135 | <<locked>> | 80% | 50,560 psi | 79% | 3097 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 51,053 psi | 80% | 3114 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,438 psi | 67% | 2972 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 38,276 psi | 60% | 2927 fps | 97% |
| Vihtavuori N165 | <<locked>> | 96% | 46,282 psi | 73% | 3094 fps | 95.8% |
| Vihtavuori N540 | <<locked>> | 80% | 49,327 psi | 77% | 3097 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,811 psi | 59% | 2923 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 84% | 33,344 psi | 52% | 2861 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,666 psi | 59% | 2894 fps | 98.9% |
| Winchester 760 | <<locked>> | 82% | 42,090 psi | 66% | 3054 fps | 95.5% |
| Winchester StaBALL HD | <<locked>> | 86% | 28,456 psi | 45% | 2795 fps | 95.6% |
| Winchester StaBALL Match | <<locked>> | 80% | 53,156 psi | 83% | 3222 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 46,644 psi | 73% | 3107 fps | 95.1% |
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 101 powders for .300 Norma Mag. loaded with the .308 | 138gr | Hasler ARIETE. Alliant Reloder-26 delivers the highest muzzle velocity at 3,442 fps; across all powders the maximum-charge window runs from 2,100 fps to 3,442 fps. Accurate 3100 gives the best case fill at 100 %, and 101 of the 101 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 138.0 gr projectile in 0.308" calls for a 1:12.5 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, Alliant Reloder-17, Hodgdon H414 rank at the top here: for .300 Norma Mag. with the .308 | 138gr | Hasler ARIETE they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2225, Baschieri & Pellagri 109, Bofors RP30 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.