Load Specifications
Load data in caliber .300 Lapua Mag. with .308 | 150gr | Lapua Mega bullet and 78 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Norma MRP, Alliant Reloder-26 and Winchester 760.
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.
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Max Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 82% | 54,331 psi | 89% | 3114 fps | 98.6% |
| Accurate 3100 | <<locked>> | 98% | 53,113 psi | 87% | 3163 fps | 99.5% |
| Accurate 4064 | <<locked>> | 82% | 53,983 psi | 89% | 3107 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 54,955 psi | 90% | 3219 fps | 100% |
| ADI AR 2208 | <<locked>> | 84% | 53,824 psi | 88% | 3140 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 52,388 psi | 86% | 3202 fps | 97.6% |
| ADI AR 2213 | <<locked>> | 98% | 53,606 psi | 88% | 3255 fps | 96.7% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 52,489 psi | 86% | 3199 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 54,650 psi | 90% | 3163 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 54,839 psi | 90% | 3186 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 52,112 psi | 86% | 3225 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 53,200 psi | 87% | 3245 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 51,837 psi | 85% | 3189 fps | 97.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 52,808 psi | 87% | 3251 fps | 98% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 53,287 psi | 87% | 3238 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 46,296 psi | 76% | 3159 fps | 99.4% |
| Alliant Reloder-26 | <<locked>> | 96% | 53,592 psi | 88% | 3330 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 51,822 psi | 85% | 3232 fps | 97.7% |
| Bofors RP3 | <<locked>> | 82% | 51,953 psi | 85% | 3123 fps | 100% |
| Bofors RP5 | <<locked>> | 98% | 52,808 psi | 87% | 3251 fps | 98% |
| Bofors RP7 | <<locked>> | 88% | 54,882 psi | 90% | 3166 fps | 98.8% |
| Hodgdon H380 | <<locked>> | 82% | 52,301 psi | 86% | 3140 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 88% | 53,258 psi | 87% | 3212 fps | 99% |
| Hodgdon H4350 | <<locked>> | 86% | 53,011 psi | 87% | 3169 fps | 98% |
| Hodgdon H4831 | <<locked>> | 96% | 53,650 psi | 88% | 3192 fps | 96% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 52,359 psi | 86% | 3140 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 45,455 psi | 75% | 3196 fps | 97% |
| Hodgdon Superformance | <<locked>> | 88% | 53,447 psi | 88% | 3245 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,521 psi | 60% | 2024 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 53,142 psi | 87% | 3120 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 52,692 psi | 87% | 3143 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 53,084 psi | 87% | 3133 fps | 98.9% |
| IMR 4831 | <<locked>> | 90% | 51,866 psi | 85% | 3153 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 51,953 psi | 85% | 3123 fps | 95.8% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 54,824 psi | 90% | 3294 fps | 97.1% |
| Lovex S062 | <<locked>> | 82% | 53,534 psi | 88% | 3114 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 53,447 psi | 88% | 3136 fps | 99.6% |
| Lovex S070 | <<locked>> | 90% | 54,578 psi | 90% | 3179 fps | 99.3% |
| Lovex S071ᴾ | <<locked>> | 100% | 47,224 psi | 78% | 3058 fps | 98.8% |
| Norma 203B | <<locked>> | 82% | 54,186 psi | 89% | 3173 fps | 100% |
| Norma 204 | <<locked>> | 90% | 53,301 psi | 88% | 3192 fps | 97.7% |
| Norma MRP | <<locked>> | 96% | 52,272 psi | 86% | 3278 fps | 99% |
| Norma URP | <<locked>> | 90% | 53,447 psi | 88% | 3202 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 54,882 psi | 90% | 3196 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 51,430 psi | 84% | 3238 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 90% | 52,460 psi | 86% | 3199 fps | 99.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 49,516 psi | 81% | 3166 fps | 98% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,115 psi | 61% | 2070 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 52,257 psi | 86% | 3120 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 52,591 psi | 86% | 3238 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 54,766 psi | 90% | 3241 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 53,272 psi | 87% | 3271 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 45,643 psi | 75% | 3189 fps | 98.2% |
| Rottweil R 903 | <<locked>> | 84% | 52,214 psi | 86% | 3120 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 53,998 psi | 89% | 3173 fps | 96.9% |
| Rottweil R 905 | <<locked>> | 96% | 54,592 psi | 90% | 3238 fps | 98.2% |
| Rottweil R 907 | <<locked>> | 88% | 54,882 psi | 90% | 3166 fps | 98.8% |
| Shooters World Long Rifle | <<locked>> | 88% | 53,447 psi | 88% | 3136 fps | 99.6% |
| Shooters World Precision | <<locked>> | 82% | 53,534 psi | 88% | 3114 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 54,578 psi | 90% | 3179 fps | 99.3% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 53,679 psi | 88% | 3182 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 53,011 psi | 87% | 3002 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 52,779 psi | 87% | 3077 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 54,128 psi | 89% | 3232 fps | 98.1% |
| Somchem S355 | <<locked>> | 84% | 52,156 psi | 86% | 3117 fps | 100% |
| Somchem S365 | <<locked>> | 92% | 53,156 psi | 87% | 3205 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 51,808 psi | 85% | 3150 fps | 98.4% |
| Vihtavuori N150 | <<locked>> | 86% | 53,447 psi | 88% | 3091 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 52,112 psi | 86% | 3140 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 54,636 psi | 90% | 3179 fps | 98.6% |
| Vihtavuori N540 | <<locked>> | 82% | 54,230 psi | 89% | 3094 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 54,708 psi | 90% | 3199 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 52,402 psi | 86% | 3212 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 52,533 psi | 86% | 3261 fps | 96.1% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 51,619 psi | 85% | 3097 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 53,461 psi | 88% | 3215 fps | 99.1% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 49,081 psi | 81% | 3310 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 51,721 psi | 85% | 3140 fps | 97.5% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 26"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 2700 | <<locked>> | 80% | 50,821 psi | 83% | 3051 fps | 98% |
| Accurate 3100 | <<locked>> | 86% | 35,157 psi | 58% | 2792 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 50,604 psi | 83% | 3054 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 38,841 psi | 64% | 2907 fps | 98.4% |
| ADI AR 2208 | <<locked>> | 80% | 47,500 psi | 78% | 3028 fps | 99.8% |
| ADI AR 2209 | <<locked>> | 88% | 42,917 psi | 70% | 3009 fps | 95.2% |
| ADI AR 2213 | <<locked>> | 96% | 50,111 psi | 82% | 3186 fps | 95.8% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 43,091 psi | 71% | 3009 fps | 95.3% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 48,211 psi | 79% | 3051 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 51,416 psi | 84% | 3130 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 37,594 psi | 62% | 2917 fps | 98.4% |
| Alliant Reloder-17 | <<locked>> | 80% | 42,873 psi | 70% | 3054 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 88% | 42,612 psi | 70% | 2999 fps | 95.2% |
| Alliant Reloder-22 | <<locked>> | 92% | 43,018 psi | 71% | 3054 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 80% | 27,673 psi | 45% | 2641 fps | 96.1% |
| Alliant Reloder-25 | <<locked>> | 90% | 33,605 psi | 55% | 2835 fps | 95.6% |
| Alliant Reloder-26 | 75 gr | 82% | 31,879 psi | 52% | 2828 fps | 95.7% |
| Bofors RP15 | <<locked>> | 94% | 42,424 psi | 70% | 3038 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 48,602 psi | 80% | 3064 fps | 100% |
| Bofors RP5 | <<locked>> | 92% | 43,018 psi | 71% | 3054 fps | 95.5% |
| Bofors RP7 | <<locked>> | 80% | 42,583 psi | 70% | 2923 fps | 96.3% |
| Hodgdon H380 | <<locked>> | 80% | 49,008 psi | 80% | 3081 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 80% | 40,640 psi | 67% | 2953 fps | 96.4% |
| Hodgdon H4350 | <<locked>> | 80% | 43,540 psi | 71% | 2979 fps | 95.8% |
| Hodgdon H4831 | <<locked>> | 94% | 50,198 psi | 82% | 3130 fps | 95.2% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 35,230 psi | 58% | 2799 fps | 98.9% |
| Hodgdon Retumbo | <<locked>> | 98% | 42,395 psi | 70% | 3120 fps | 95.9% |
| Hodgdon Superformance | <<locked>> | 80% | 39,827 psi | 65% | 2966 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,180 psi | 45% | 1811 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 49,980 psi | 82% | 3064 fps | 100% |
| IMR 4350 | <<locked>> | 82% | 40,785 psi | 67% | 2900 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,077 psi | 72% | 2956 fps | 97.2% |
| IMR 4831 | <<locked>> | 80% | 37,188 psi | 61% | 2851 fps | 98% |
| IMR 4955 Enduron | <<locked>> | 92% | 48,776 psi | 80% | 3064 fps | 95% |
| IMR 7828 SSC | <<locked>> | 96% | 47,703 psi | 78% | 3150 fps | 95.2% |
| Lovex S062 | <<locked>> | 80% | 50,198 psi | 82% | 3058 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 41,553 psi | 68% | 2904 fps | 97.9% |
| Lovex S070 | <<locked>> | 80% | 39,755 psi | 65% | 2877 fps | 96.3% |
| Lovex S071 | <<locked>> | 90% | 34,040 psi | 56% | 2762 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 50,807 psi | 83% | 3114 fps | 100% |
| Norma 204 | <<locked>> | 84% | 43,337 psi | 71% | 2995 fps | 95.2% |
| Norma MRP | 78.1 gr | 88% | 39,421 psi | 65% | 3002 fps | 95.9% |
| Norma URP | <<locked>> | 80% | 38,435 psi | 63% | 2897 fps | 98.2% |
| Ramshot Big Game | <<locked>> | 80% | 51,300 psi | 84% | 3136 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 47,761 psi | 78% | 3163 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 37,362 psi | 61% | 2881 fps | 96.3% |
| Ramshot Magnum | <<locked>> | 94% | 39,682 psi | 65% | 2956 fps | 95.2% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,789 psi | 46% | 1857 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 48,863 psi | 80% | 3058 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 45,513 psi | 75% | 3114 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 38,595 psi | 63% | 2923 fps | 98.1% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 37,376 psi | 61% | 2927 fps | 97.4% |
| ReloadSwiss RS 76 | <<locked>> | 96% | 39,494 psi | 65% | 3035 fps | 96% |
| Rottweil R 903 | <<locked>> | 80% | 45,730 psi | 75% | 3005 fps | 100% |
| Rottweil R 904 | <<locked>> | 90% | 47,384 psi | 78% | 3048 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 88% | 41,684 psi | 68% | 2979 fps | 95.1% |
| Rottweil R 907 | <<locked>> | 80% | 42,583 psi | 70% | 2923 fps | 96.3% |
| Shooters World Long Rifle | <<locked>> | 80% | 41,553 psi | 68% | 2904 fps | 97.9% |
| Shooters World Precision | <<locked>> | 80% | 50,198 psi | 82% | 3058 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 39,755 psi | 65% | 2877 fps | 96.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 46,992 psi | 77% | 3064 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 46,847 psi | 77% | 2904 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 40,654 psi | 67% | 2838 fps | 96.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 88% | 41,292 psi | 68% | 2972 fps | 95% |
| Somchem S355 | <<locked>> | 80% | 45,992 psi | 76% | 3005 fps | 100% |
| Somchem S365 | <<locked>> | 80% | 34,954 psi | 57% | 2851 fps | 99.7% |
| Somchem S385 | <<locked>> | 86% | 39,697 psi | 65% | 2904 fps | 95.4% |
| Vihtavuori N150 | <<locked>> | 80% | 43,888 psi | 72% | 2923 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 39,929 psi | 66% | 2900 fps | 98.5% |
| Vihtavuori N165 | <<locked>> | 92% | 41,800 psi | 69% | 2936 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 50,937 psi | 84% | 3041 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 39,450 psi | 65% | 2900 fps | 98.2% |
| Vihtavuori N555 | <<locked>> | 80% | 30,560 psi | 50% | 2723 fps | 96.2% |
| Vihtavuori N560 | <<locked>> | 94% | 49,139 psi | 81% | 3196 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,146 psi | 64% | 2864 fps | 99.7% |
| Winchester 760 | 69.9 gr | 80% | 40,814 psi | 67% | 2956 fps | 96.4% |
| Winchester StaBALL HD | <<locked>> | 82% | 26,121 psi | 43% | 2671 fps | 96% |
| Winchester Supreme 780 | <<locked>> | 92% | 44,904 psi | 74% | 3009 fps | 95.9% |
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 78 powders for .300 Lapua Mag. loaded with the .308 | 150gr | Lapua Mega. Alliant Reloder-26 delivers the highest muzzle velocity at 3,330 fps; across all powders the maximum-charge window runs from 2,024 fps to 3,330 fps. Alliant Reloder-23 gives the best case fill at 100 %, and 78 of the 78 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 60–90 %, leaving at least 10 % headroom. The 150.0 gr projectile in 0.308" calls for a 1:11.5 twist; slower twists will usually not stabilise this weight. Alliant Reloder-23, Alliant Reloder-25, Bofors RP15 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. Norma MRP, Alliant Reloder-26, Winchester 760 rank at the top here: for .300 Lapua Mag. with the .308 | 150gr | Lapua Mega 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.