Load Specifications
Load data in caliber .300 Norma Mag. with .308 | 135gr | Sierra HPBT MatchKing bullet and 83 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP 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: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2495 | <<locked>> | 82% | 56,739 psi | 89% | 3215 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 54,201 psi | 85% | 3222 fps | 97.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 56,840 psi | 89% | 3323 fps | 99.3% |
| Accurate 4064 | <<locked>> | 84% | 57,246 psi | 90% | 3278 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,636 psi | 86% | 3323 fps | 99.8% |
| ADI AR 2208 | <<locked>> | 86% | 56,869 psi | 89% | 3304 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 55,854 psi | 88% | 3366 fps | 97.2% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 57,363 psi | 90% | 3419 fps | 96.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 56,695 psi | 89% | 3442 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,433 psi | 85% | 3274 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,549 psi | 85% | 3297 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 92% | 55,405 psi | 87% | 3392 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 56,782 psi | 89% | 3415 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 55,114 psi | 86% | 3346 fps | 97.1% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 56,521 psi | 89% | 3412 fps | 97.6% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,330 psi | 84% | 3340 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,325 psi | 73% | 3245 fps | 98.5% |
| Alliant Reloder-26 | <<locked>> | 96% | 53,592 psi | 84% | 3422 fps | 99.8% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,692 psi | 81% | 3320 fps | 96.4% |
| Bofors RP3 | <<locked>> | 84% | 55,419 psi | 87% | 3294 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 56,521 psi | 89% | 3412 fps | 97.6% |
| Bofors RP7 | <<locked>> | 88% | 54,708 psi | 86% | 3268 fps | 97.9% |
| Hodgdon H380 | <<locked>> | 84% | 55,637 psi | 87% | 3307 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 90% | 56,913 psi | 89% | 3379 fps | 98.8% |
| Hodgdon H4350 | <<locked>> | 88% | 56,333 psi | 88% | 3333 fps | 97.6% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 55,796 psi | 87% | 3307 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 56,840 psi | 89% | 3350 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 57,624 psi | 90% | 3415 fps | 98.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,390 psi | 57% | 2133 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 57,217 psi | 90% | 3310 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 56,405 psi | 88% | 3291 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 55,332 psi | 87% | 3264 fps | 98.5% |
| IMR 4350 | <<locked>> | 92% | 55,883 psi | 88% | 3301 fps | 98.2% |
| IMR 4451 Enduron | <<locked>> | 88% | 56,217 psi | 88% | 3301 fps | 98.5% |
| IMR 4831 | <<locked>> | 92% | 55,114 psi | 86% | 3314 fps | 99.9% |
| IMR 4895 | <<locked>> | 82% | 55,956 psi | 88% | 3330 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 57,580 psi | 90% | 3274 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 56,550 psi | 89% | 3281 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 56,449 psi | 88% | 3297 fps | 99.4% |
| Lovex S070 | <<locked>> | 90% | 54,433 psi | 85% | 3281 fps | 98.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,050 psi | 74% | 3143 fps | 97.8% |
| Norma 203B | <<locked>> | 84% | 57,406 psi | 90% | 3343 fps | 100% |
| Norma 204 | <<locked>> | 92% | 56,898 psi | 89% | 3356 fps | 97.2% |
| Norma MRP | <<locked>> | 98% | 56,347 psi | 88% | 3445 fps | 98.7% |
| Norma URP | <<locked>> | 92% | 56,869 psi | 89% | 3366 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 82% | 54,752 psi | 86% | 3307 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 55,347 psi | 87% | 3402 fps | 96.3% |
| Ramshot Hunter | <<locked>> | 92% | 55,869 psi | 88% | 3360 fps | 99.2% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,647 psi | 78% | 3255 fps | 96.8% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,057 psi | 58% | 2182 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 55,492 psi | 87% | 3287 fps | 98.9% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 56,173 psi | 88% | 3409 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,737 psi | 86% | 3343 fps | 99.7% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 57,159 psi | 90% | 3438 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,687 psi | 72% | 3264 fps | 96.7% |
| Rottweil R 902 | <<locked>> | 82% | 55,056 psi | 86% | 3241 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 55,492 psi | 87% | 3287 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 57,377 psi | 90% | 3333 fps | 96.4% |
| Rottweil R 905 | <<locked>> | 96% | 54,476 psi | 85% | 3333 fps | 97.2% |
| Rottweil R 907 | <<locked>> | 88% | 54,708 psi | 86% | 3268 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 90% | 56,449 psi | 88% | 3297 fps | 99.4% |
| Shooters World Precision | <<locked>> | 84% | 56,550 psi | 89% | 3281 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,433 psi | 85% | 3281 fps | 98.5% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 57,116 psi | 90% | 3353 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 57,711 psi | 90% | 3323 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 56,173 psi | 88% | 3169 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 56,260 psi | 88% | 3241 fps | 98.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 53,998 psi | 85% | 3327 fps | 97% |
| Somchem S355 | <<locked>> | 86% | 55,216 psi | 87% | 3281 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 56,579 psi | 89% | 3373 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 55,158 psi | 86% | 3307 fps | 98% |
| Vihtavuori N135 | <<locked>> | 82% | 55,419 psi | 87% | 3202 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 55,753 psi | 87% | 3215 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 56,710 psi | 89% | 3255 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 55,347 psi | 87% | 3301 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,563 psi | 86% | 3274 fps | 97.6% |
| Vihtavuori N540 | <<locked>> | 84% | 57,624 psi | 90% | 3261 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,578 psi | 86% | 3304 fps | 99.7% |
| Vihtavuori N555 | <<locked>> | 98% | 55,782 psi | 87% | 3373 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 55,230 psi | 87% | 3261 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 57,101 psi | 89% | 3383 fps | 98.8% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,037 psi | 77% | 3406 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 55,347 psi | 87% | 3301 fps | 97.1% |
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% | 53,142 psi | 83% | 3163 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 50,546 psi | 79% | 3150 fps | 96.9% |
| Accurate 3100 | <<locked>> | 90% | 40,118 psi | 63% | 2995 fps | 95.9% |
| Accurate 4064 | <<locked>> | 80% | 50,314 psi | 79% | 3163 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,595 psi | 60% | 2989 fps | 97.1% |
| ADI AR 2208 | <<locked>> | 80% | 47,195 psi | 74% | 3127 fps | 99.4% |
| ADI AR 2209 | <<locked>> | 92% | 48,791 psi | 76% | 3228 fps | 95.5% |
| ADI AR 2213 | <<locked>> | 98% | 53,490 psi | 84% | 3343 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 52,649 psi | 83% | 3366 fps | 99.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 47,906 psi | 75% | 3156 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,155 psi | 80% | 3235 fps | 99.8% |
| Alliant Reloder-16 | 71.4 gr | 80% | 37,231 psi | 58% | 2992 fps | 97% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,540 psi | 67% | 3143 fps | 99.5% |
| Alliant Reloder-19 | <<locked>> | 92% | 48,443 psi | 76% | 3219 fps | 95.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 49,255 psi | 77% | 3274 fps | 95.9% |
| Alliant Reloder-23 | <<locked>> | 82% | 29,370 psi | 46% | 2766 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 94% | 38,014 psi | 60% | 3035 fps | 95.8% |
| Alliant Reloder-26 | 84.8 gr | 86% | 36,796 psi | 58% | 3041 fps | 96.1% |
| Bofors RP15 | <<locked>> | 98% | 48,370 psi | 76% | 3255 fps | 95.5% |
| Bofors RP3 | <<locked>> | 80% | 48,443 psi | 76% | 3169 fps | 100% |
| Bofors RP5 | <<locked>> | 96% | 49,255 psi | 77% | 3274 fps | 95.9% |
| Bofors RP7 | <<locked>> | 82% | 45,165 psi | 71% | 3074 fps | 95.7% |
| Hodgdon H380 | <<locked>> | 80% | 48,776 psi | 76% | 3179 fps | 98.9% |
| Hodgdon H414 | <<locked>> | 82% | 43,395 psi | 68% | 3107 fps | 95.8% |
| Hodgdon H4350 | <<locked>> | 82% | 46,253 psi | 72% | 3133 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 34,925 psi | 55% | 2877 fps | 97.7% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 53,171 psi | 83% | 3287 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 42,670 psi | 67% | 3117 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,137 psi | 43% | 1913 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 53,722 psi | 84% | 3255 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,647 psi | 78% | 3169 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 80% | 52,011 psi | 82% | 3199 fps | 97.9% |
| IMR 4350 | <<locked>> | 84% | 43,265 psi | 68% | 3048 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 43,772 psi | 69% | 3045 fps | 95.8% |
| IMR 4831 | <<locked>> | 80% | 36,999 psi | 58% | 2933 fps | 96.7% |
| IMR 4895 | <<locked>> | 80% | 52,504 psi | 82% | 3271 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 54,317 psi | 85% | 3219 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 50,009 psi | 78% | 3166 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,365 psi | 65% | 2992 fps | 96.6% |
| Lovex S070 | <<locked>> | 82% | 42,264 psi | 66% | 3028 fps | 95.7% |
| Lovex S071 | <<locked>> | 94% | 38,595 psi | 60% | 2956 fps | 95.3% |
| Norma 203B | <<locked>> | 80% | 50,531 psi | 79% | 3222 fps | 99.9% |
| Norma 204 | <<locked>> | 88% | 49,501 psi | 78% | 3219 fps | 95.6% |
| Norma MRP | 86.1 gr | 90% | 42,221 psi | 66% | 3150 fps | 95.3% |
| Norma URP | <<locked>> | 80% | 38,261 psi | 60% | 2982 fps | 96.9% |
| Ramshot Big Game | <<locked>> | 80% | 50,981 psi | 80% | 3238 fps | 99.9% |
| Ramshot Grand | <<locked>> | 98% | 51,387 psi | 81% | 3327 fps | 95.2% |
| Ramshot Hunter | <<locked>> | 82% | 39,711 psi | 62% | 3025 fps | 95.6% |
| Ramshot Magnum | <<locked>> | 98% | 45,934 psi | 72% | 3179 fps | 95.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,659 psi | 43% | 1955 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,631 psi | 76% | 3153 fps | 97.8% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,194 psi | 71% | 3212 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,421 psi | 60% | 3002 fps | 96.7% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,144 psi | 58% | 2999 fps | 95.8% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 42,467 psi | 67% | 3179 fps | 95.4% |
| Rottweil R 902 | <<locked>> | 80% | 51,677 psi | 81% | 3182 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 45,556 psi | 71% | 3104 fps | 99.8% |
| Rottweil R 904 | <<locked>> | 94% | 53,809 psi | 84% | 3268 fps | 95.6% |
| Rottweil R 905 | <<locked>> | 92% | 47,485 psi | 74% | 3196 fps | 95.4% |
| Rottweil R 907 | <<locked>> | 82% | 45,165 psi | 71% | 3074 fps | 95.7% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,365 psi | 65% | 2992 fps | 96.6% |
| Shooters World Precision | <<locked>> | 80% | 50,009 psi | 78% | 3166 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 42,264 psi | 66% | 3028 fps | 95.7% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,644 psi | 73% | 3159 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 54,070 psi | 85% | 3261 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,572 psi | 73% | 3012 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,466 psi | 63% | 2923 fps | 95% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 47,079 psi | 74% | 3192 fps | 95.3% |
| Somchem S355 | <<locked>> | 80% | 45,759 psi | 72% | 3107 fps | 99.7% |
| Somchem S365 | <<locked>> | 80% | 34,722 psi | 54% | 2930 fps | 98.9% |
| Somchem S385 | <<locked>> | 90% | 45,078 psi | 71% | 3110 fps | 95.7% |
| Vihtavuori N135 | <<locked>> | 80% | 52,069 psi | 82% | 3150 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 52,315 psi | 82% | 3163 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 43,729 psi | 69% | 3025 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 39,668 psi | 62% | 2986 fps | 97.3% |
| Vihtavuori N165 | <<locked>> | 94% | 44,541 psi | 70% | 3081 fps | 95.1% |
| Vihtavuori N540 | <<locked>> | 80% | 50,705 psi | 79% | 3150 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,218 psi | 61% | 2982 fps | 97% |
| Vihtavuori N555 | <<locked>> | 82% | 32,503 psi | 51% | 2858 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 38,856 psi | 61% | 2946 fps | 99.1% |
| Winchester 760 | <<locked>> | 82% | 43,395 psi | 68% | 3107 fps | 95.8% |
| Winchester StaBALL HD | <<locked>> | 86% | 29,747 psi | 47% | 2867 fps | 96.3% |
| Winchester Supreme 780 | <<locked>> | 94% | 48,095 psi | 75% | 3163 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 96 powders for .300 Norma Mag. loaded with the .308 | 135gr | Sierra HPBT MatchKing. Norma MRP delivers the highest muzzle velocity at 3,445 fps; across all powders the maximum-charge window runs from 2,133 fps to 3,445 fps. Accurate 3100 gives the best case fill at 100 %, and 96 of the 96 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 57–90 %, leaving at least 10 % headroom. The 135.0 gr projectile in 0.308" calls for a 1:15.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, ADI AR 2225 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, Norma MRP, Alliant Reloder-16 rank at the top here: for .300 Norma Mag. with the .308 | 135gr | Sierra HPBT MatchKing they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2225, Baschieri & Pellagri 109 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.