Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 185gr | Peregrine Bushmaster (VRG-3) 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 ReloadSwiss RS 70.
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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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% | 52,446 psi | 86% | 2900 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 54,462 psi | 89% | 2963 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 51,938 psi | 85% | 2992 fps | 99% |
| Accurate 4064 | <<locked>> | 84% | 52,895 psi | 87% | 2953 fps | 100% |
| Accurate 4350 | <<locked>> | 92% | 53,954 psi | 89% | 3054 fps | 99.9% |
| Accurate High Country | <<locked>> | 98% | 53,229 psi | 87% | 3136 fps | 96.2% |
| ADI AR 2208 | <<locked>> | 86% | 53,853 psi | 88% | 2992 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 51,909 psi | 85% | 3035 fps | 96.8% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 52,779 psi | 87% | 3107 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 51,924 psi | 85% | 3035 fps | 96.9% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 54,331 psi | 89% | 3012 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 54,665 psi | 90% | 3035 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 55,042 psi | 90% | 3120 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 52,533 psi | 86% | 3087 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 54,781 psi | 90% | 3084 fps | 97.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 51,880 psi | 85% | 3077 fps | 97.1% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 48,776 psi | 80% | 3015 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 42,569 psi | 70% | 2923 fps | 98.1% |
| Alliant Reloder-26 | <<locked>> | 98% | 52,330 psi | 86% | 3150 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 55,013 psi | 90% | 3028 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 51,880 psi | 85% | 3077 fps | 97.1% |
| Bofors RP7 | <<locked>> | 90% | 54,795 psi | 90% | 3009 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 84% | 52,054 psi | 85% | 2986 fps | 99.6% |
| Hodgdon H414 | <<locked>> | 90% | 52,779 psi | 87% | 3048 fps | 98.5% |
| Hodgdon H4350 | <<locked>> | 88% | 52,707 psi | 87% | 3009 fps | 97.3% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 51,706 psi | 85% | 2986 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 53,229 psi | 87% | 3028 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 53,185 psi | 87% | 3084 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,071 psi | 59% | 1919 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 54,099 psi | 89% | 2995 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 53,113 psi | 87% | 2972 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 52,388 psi | 86% | 2949 fps | 98.3% |
| IMR 4350 | <<locked>> | 92% | 52,257 psi | 86% | 2982 fps | 97.9% |
| IMR 4451 Enduron | <<locked>> | 88% | 53,229 psi | 87% | 2986 fps | 98.4% |
| IMR 4831 | <<locked>> | 94% | 54,534 psi | 90% | 3045 fps | 99.9% |
| IMR 4895 | <<locked>> | 82% | 52,547 psi | 86% | 3009 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 54,839 psi | 90% | 2963 fps | 100% |
| Lovex S062 | <<locked>> | 84% | 53,171 psi | 87% | 2966 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 52,968 psi | 87% | 2979 fps | 99.3% |
| Lovex S070 | <<locked>> | 92% | 54,244 psi | 89% | 3018 fps | 98.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 42,714 psi | 70% | 2825 fps | 97.3% |
| Norma 201 | <<locked>> | 82% | 54,476 psi | 89% | 2979 fps | 100% |
| Norma 203B | <<locked>> | 84% | 53,954 psi | 89% | 3022 fps | 100% |
| Norma 204 | <<locked>> | 92% | 53,069 psi | 87% | 3035 fps | 96.9% |
| Norma MRP | <<locked>> | 98% | 51,387 psi | 84% | 3100 fps | 98.3% |
| Norma URP | <<locked>> | 92% | 52,997 psi | 87% | 3045 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 84% | 54,766 psi | 90% | 3045 fps | 100% |
| Ramshot Hunter | <<locked>> | 92% | 51,953 psi | 85% | 3038 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,622 psi | 60% | 1962 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 52,214 psi | 86% | 2969 fps | 98.7% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 52,011 psi | 85% | 3081 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 54,099 psi | 89% | 3077 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 52,808 psi | 87% | 3107 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 55,085 psi | 90% | 2979 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 55,085 psi | 90% | 3022 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 53,592 psi | 88% | 3009 fps | 96% |
| Rottweil R 905 | <<locked>> | 98% | 53,867 psi | 88% | 3068 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 90% | 54,795 psi | 90% | 3009 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 52,968 psi | 87% | 2979 fps | 99.3% |
| Shooters World Precision | <<locked>> | 84% | 53,171 psi | 87% | 2966 fps | 100% |
| Shooters World SW4350 | <<locked>> | 92% | 54,244 psi | 89% | 3018 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 53,417 psi | 88% | 3031 fps | 100% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 54,447 psi | 89% | 3009 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 52,968 psi | 87% | 2864 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 52,649 psi | 86% | 2927 fps | 98.4% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 53,388 psi | 88% | 3064 fps | 97.4% |
| Somchem S335 | <<locked>> | 82% | 55,085 psi | 90% | 2907 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 55,100 psi | 90% | 3018 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 52,011 psi | 85% | 3041 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 54,505 psi | 89% | 3041 fps | 98.3% |
| Vihtavuori N135 | <<locked>> | 82% | 52,069 psi | 85% | 2894 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 52,417 psi | 86% | 2904 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 53,026 psi | 87% | 2943 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 55,114 psi | 90% | 3038 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 50,372 psi | 83% | 2956 fps | 97.1% |
| Vihtavuori N540 | <<locked>> | 84% | 54,186 psi | 89% | 2949 fps | 100% |
| Vihtavuori N550 | <<locked>> | 92% | 54,230 psi | 89% | 3041 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 54,563 psi | 90% | 3097 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 55,042 psi | 90% | 3005 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 52,968 psi | 87% | 3051 fps | 98.5% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 43,961 psi | 72% | 3061 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 54,650 psi | 90% | 3015 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 54,853 psi | 90% | 3035 fps | 97.4% |
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% | 49,124 psi | 81% | 2851 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 47,630 psi | 78% | 2844 fps | 96.7% |
| Accurate 3100 | <<locked>> | 90% | 36,332 psi | 60% | 2687 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 46,557 psi | 76% | 2851 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 35,128 psi | 58% | 2684 fps | 96.6% |
| Accurate High Country | <<locked>> | 96% | 49,458 psi | 81% | 3068 fps | 95.2% |
| ADI AR 2208 | <<locked>> | 80% | 44,512 psi | 73% | 2825 fps | 99.3% |
| ADI AR 2209 | <<locked>> | 92% | 45,295 psi | 74% | 2907 fps | 95% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,066 psi | 81% | 3041 fps | 99.8% |
| Alliant Power Pro Varmint | <<locked>> | 92% | 45,397 psi | 75% | 2910 fps | 95.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,817 psi | 74% | 2851 fps | 99.9% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,892 psi | 79% | 2920 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 80% | 34,650 psi | 57% | 2697 fps | 96.7% |
| Alliant Reloder-17 | <<locked>> | 80% | 39,392 psi | 65% | 2835 fps | 99.4% |
| Alliant Reloder-19 | <<locked>> | 92% | 44,802 psi | 74% | 2900 fps | 95% |
| Alliant Reloder-22 | <<locked>> | 96% | 45,208 psi | 74% | 2949 fps | 95.3% |
| Alliant Reloder-23 | <<locked>> | 84% | 28,601 psi | 47% | 2543 fps | 95.6% |
| Alliant Reloder-25 | <<locked>> | 94% | 34,853 psi | 57% | 2730 fps | 95.1% |
| Alliant Reloder-26 | 87.2 gr | 86% | 33,214 psi | 55% | 2726 fps | 95.3% |
| Bofors RP3 | <<locked>> | 80% | 44,831 psi | 74% | 2854 fps | 99.9% |
| Bofors RP5 | <<locked>> | 96% | 45,208 psi | 74% | 2949 fps | 95.3% |
| Bofors RP7 | <<locked>> | 82% | 42,351 psi | 70% | 2772 fps | 95.4% |
| Hodgdon H380 | <<locked>> | 80% | 45,353 psi | 74% | 2864 fps | 98.7% |
| Hodgdon H414 | <<locked>> | 82% | 40,132 psi | 66% | 2799 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 84% | 46,238 psi | 76% | 2887 fps | 95.7% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,053 psi | 53% | 2589 fps | 97.4% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 49,792 psi | 82% | 2972 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 42,409 psi | 70% | 2877 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,803 psi | 44% | 1716 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 50,676 psi | 83% | 2940 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,789 psi | 77% | 2864 fps | 99.6% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,110 psi | 81% | 2887 fps | 97.7% |
| IMR 4350 | <<locked>> | 86% | 43,120 psi | 71% | 2808 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,191 psi | 68% | 2753 fps | 95.6% |
| IMR 4831 | <<locked>> | 80% | 33,953 psi | 56% | 2638 fps | 96.3% |
| IMR 4895 | <<locked>> | 80% | 49,168 psi | 81% | 2953 fps | 99.9% |
| Lovex S060 | <<locked>> | 80% | 51,416 psi | 84% | 2907 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,760 psi | 77% | 2858 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,566 psi | 63% | 2697 fps | 96.3% |
| Lovex S070 | <<locked>> | 82% | 39,175 psi | 64% | 2726 fps | 95.3% |
| Lovex S071 | <<locked>> | 96% | 37,420 psi | 61% | 2713 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 51,155 psi | 84% | 2927 fps | 100% |
| Norma 203B | <<locked>> | 80% | 47,268 psi | 78% | 2907 fps | 99.8% |
| Norma 204 | <<locked>> | 88% | 46,137 psi | 76% | 2904 fps | 95.1% |
| Norma MRP | 90.6 gr | 92% | 41,423 psi | 68% | 2900 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 35,273 psi | 58% | 2684 fps | 96.5% |
| Ramshot Big Game | <<locked>> | 80% | 47,616 psi | 78% | 2927 fps | 99.8% |
| Ramshot Hunter | <<locked>> | 82% | 36,709 psi | 60% | 2726 fps | 95.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,224 psi | 45% | 1755 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 45,542 psi | 75% | 2848 fps | 97.5% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 41,930 psi | 69% | 2900 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 35,070 psi | 58% | 2697 fps | 96.2% |
| ReloadSwiss RS 70 | 80.4 gr | 80% | 34,330 psi | 56% | 2703 fps | 95.2% |
| Rottweil R 902 | <<locked>> | 80% | 48,602 psi | 80% | 2874 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 42,192 psi | 69% | 2799 fps | 99.6% |
| Rottweil R 904 | <<locked>> | 94% | 50,285 psi | 83% | 2949 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 94% | 46,862 psi | 77% | 2943 fps | 95.8% |
| Rottweil R 907 | <<locked>> | 82% | 42,351 psi | 70% | 2772 fps | 95.4% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,566 psi | 63% | 2697 fps | 96.3% |
| Shooters World Precision | <<locked>> | 80% | 46,760 psi | 77% | 2858 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 39,175 psi | 64% | 2726 fps | 95.3% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 43,569 psi | 72% | 2854 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 51,082 psi | 84% | 2953 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,874 psi | 72% | 2720 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 40,422 psi | 66% | 2697 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 46,441 psi | 76% | 2936 fps | 95.7% |
| Somchem S335 | <<locked>> | 80% | 51,837 psi | 85% | 2861 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,685 psi | 70% | 2802 fps | 99.6% |
| Somchem S365 | <<locked>> | 80% | 31,691 psi | 52% | 2635 fps | 98.5% |
| Somchem S385 | <<locked>> | 90% | 41,582 psi | 68% | 2802 fps | 95.2% |
| Vihtavuori N135 | <<locked>> | 80% | 48,791 psi | 80% | 2844 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,240 psi | 81% | 2854 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,727 psi | 67% | 2730 fps | 99.9% |
| Vihtavuori N160 | <<locked>> | 80% | 36,680 psi | 60% | 2690 fps | 97% |
| Vihtavuori N165 | <<locked>> | 96% | 43,859 psi | 72% | 2838 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 47,442 psi | 78% | 2844 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,114 psi | 59% | 2684 fps | 96.6% |
| Vihtavuori N555 | <<locked>> | 84% | 31,473 psi | 52% | 2621 fps | 95.8% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,013 psi | 59% | 2657 fps | 98.8% |
| Winchester 760 | <<locked>> | 82% | 40,277 psi | 66% | 2802 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 86% | 27,006 psi | 44% | 2562 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 50,966 psi | 84% | 2956 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 47,572 psi | 78% | 2910 fps | 95.8% |
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 83 powders for .338 Lapua Mag. loaded with the .338 | 185gr | Peregrine Bushmaster (VRG-3). Alliant Reloder-26 delivers the highest muzzle velocity at 3,150 fps; across all powders the maximum-charge window runs from 1,919 fps to 3,150 fps. Accurate 3100 gives the best case fill at 100 %, and 83 of the 83 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 185.0 gr projectile in 0.338" calls for a 1:16.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-22, Alliant Reloder-23 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, ReloadSwiss RS 70 rank at the top here: for .338 Lapua Mag. with the .338 | 185gr | Peregrine Bushmaster (VRG-3) 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.