Load Specifications
Load data in caliber .338 Lapua Mag. with .338 | 220gr | Peregrine Glider GRM bullet and 80 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 Vihtavuori N560.
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 3100 | <<locked>> | 98% | 54,418 psi | 89% | 2815 fps | 99.9% |
| Accurate 4064 | <<locked>> | 82% | 54,781 psi | 90% | 2743 fps | 100% |
| Accurate 4350 | <<locked>> | 88% | 52,446 psi | 86% | 2802 fps | 100% |
| Accurate MAGPRO | <<locked>> | 96% | 53,098 psi | 87% | 2900 fps | 96.6% |
| ADI AR 2208 | <<locked>> | 84% | 54,998 psi | 90% | 2779 fps | 100% |
| ADI AR 2209 | <<locked>> | 94% | 53,621 psi | 88% | 2854 fps | 98.6% |
| ADI AR 2213 | <<locked>> | 98% | 54,955 psi | 90% | 2907 fps | 97.9% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 37,652 psi | 62% | 2621 fps | 96.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 52,475 psi | 86% | 2753 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 90% | 53,650 psi | 88% | 2864 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 86% | 54,723 psi | 90% | 2877 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 94% | 53,200 psi | 87% | 2841 fps | 98.6% |
| Alliant Reloder-22 | <<locked>> | 98% | 54,302 psi | 89% | 2900 fps | 98.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 55,100 psi | 90% | 2881 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 47,616 psi | 78% | 2822 fps | 99.9% |
| Alliant Reloder-26 | <<locked>> | 94% | 51,459 psi | 84% | 2910 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 53,243 psi | 87% | 2881 fps | 98.7% |
| Bofors RP3 | <<locked>> | 82% | 53,200 psi | 87% | 2766 fps | 100% |
| Bofors RP30ᴾ | <<locked>> | 100% | 43,395 psi | 71% | 2740 fps | 96% |
| Bofors RP5 | <<locked>> | 98% | 54,302 psi | 89% | 2900 fps | 98.9% |
| Bofors RP7 | <<locked>> | 86% | 52,518 psi | 86% | 2753 fps | 99.1% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 47,166 psi | 77% | 2762 fps | 97.1% |
| Hodgdon H380 | <<locked>> | 82% | 53,490 psi | 88% | 2782 fps | 100% |
| Hodgdon H414 | <<locked>> | 88% | 54,708 psi | 90% | 2858 fps | 99.7% |
| Hodgdon H4350 | <<locked>> | 86% | 54,418 psi | 89% | 2822 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 94% | 51,488 psi | 85% | 2792 fps | 96.6% |
| Hodgdon H4831 SC | <<locked>> | 96% | 54,041 psi | 89% | 2831 fps | 97.1% |
| Hodgdon Hybrid 100V | <<locked>> | 92% | 53,838 psi | 88% | 2785 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 46,601 psi | 77% | 2861 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 86% | 51,053 psi | 84% | 2831 fps | 99.2% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,564 psi | 60% | 1762 fps | 100% |
| IMR 4064 | <<locked>> | 82% | 54,331 psi | 89% | 2759 fps | 100% |
| IMR 4350 | <<locked>> | 90% | 53,882 psi | 88% | 2792 fps | 99.3% |
| IMR 4451 Enduron | <<locked>> | 86% | 54,389 psi | 89% | 2785 fps | 99.5% |
| IMR 4831 | <<locked>> | 90% | 53,084 psi | 87% | 2795 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 52,997 psi | 87% | 2782 fps | 97% |
| IMR 7828 SSC | <<locked>> | 98% | 52,678 psi | 86% | 2881 fps | 97.6% |
| Lovex S062 | <<locked>> | 82% | 54,578 psi | 90% | 2753 fps | 100% |
| Lovex S065 | <<locked>> | 88% | 54,476 psi | 89% | 2779 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 52,504 psi | 86% | 2772 fps | 99.5% |
| Lovex S071ᴾ | <<locked>> | 100% | 48,153 psi | 79% | 2720 fps | 99.5% |
| Norma 204 | <<locked>> | 90% | 54,636 psi | 90% | 2844 fps | 98.6% |
| Norma MRP | <<locked>> | 96% | 54,143 psi | 89% | 2927 fps | 99.7% |
| Norma URP | <<locked>> | 90% | 55,042 psi | 90% | 2844 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 53,055 psi | 87% | 2897 fps | 98% |
| Ramshot Hunter | <<locked>> | 90% | 53,780 psi | 88% | 2844 fps | 99.9% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 51,068 psi | 84% | 2831 fps | 99% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,260 psi | 61% | 1801 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 53,447 psi | 88% | 2772 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 84% | 54,172 psi | 89% | 2871 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 88% | 52,620 psi | 86% | 2828 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 90% | 54,795 psi | 90% | 2910 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 46,659 psi | 77% | 2854 fps | 99.2% |
| Rottweil R 903 | <<locked>> | 84% | 53,272 psi | 87% | 2762 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 51,808 psi | 85% | 2769 fps | 97.3% |
| Rottweil R 905 | <<locked>> | 94% | 52,518 psi | 86% | 2828 fps | 98.6% |
| Rottweil R 907 | <<locked>> | 86% | 52,518 psi | 86% | 2753 fps | 99.1% |
| Shooters World Long Rifle | <<locked>> | 88% | 54,476 psi | 89% | 2779 fps | 100% |
| Shooters World Precision | <<locked>> | 82% | 54,578 psi | 90% | 2753 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 52,504 psi | 86% | 2772 fps | 99.5% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 55,114 psi | 90% | 2822 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 84% | 54,157 psi | 89% | 2651 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 53,954 psi | 89% | 2733 fps | 99.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 52,069 psi | 85% | 2822 fps | 98.5% |
| Somchem S355 | <<locked>> | 84% | 53,301 psi | 88% | 2759 fps | 100% |
| Somchem S361 | <<locked>> | 92% | 53,374 psi | 88% | 2762 fps | 96.9% |
| Somchem S365 | <<locked>> | 92% | 54,650 psi | 90% | 2841 fps | 100% |
| Somchem S385 | <<locked>> | 94% | 52,866 psi | 87% | 2802 fps | 99.2% |
| Vihtavuori N135 | <<locked>> | 82% | 54,447 psi | 89% | 2690 fps | 100% |
| Vihtavuori N150 | <<locked>> | 86% | 54,505 psi | 89% | 2733 fps | 100% |
| Vihtavuori N160 | <<locked>> | 88% | 53,345 psi | 88% | 2785 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 52,504 psi | 86% | 2782 fps | 98.9% |
| Vihtavuori N550 | <<locked>> | 88% | 52,576 psi | 86% | 2792 fps | 100% |
| Vihtavuori N555 | <<locked>> | 96% | 53,751 psi | 88% | 2854 fps | 100% |
| Vihtavuori N560 | <<locked>> | 96% | 54,288 psi | 89% | 2917 fps | 97.5% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 49,690 psi | 82% | 2828 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 88% | 52,881 psi | 87% | 2749 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 54,926 psi | 90% | 2861 fps | 99.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 51,372 psi | 84% | 2953 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 52,939 psi | 87% | 2795 fps | 98.5% |
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 3100 | <<locked>> | 82% | 31,024 psi | 51% | 2369 fps | 95.1% |
| Accurate 4064 | <<locked>> | 80% | 51,329 psi | 84% | 2694 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 39,595 psi | 65% | 2579 fps | 99.2% |
| Accurate MAGPRO | <<locked>> | 94% | 49,240 psi | 81% | 2835 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 48,602 psi | 80% | 2680 fps | 100% |
| ADI AR 2209 | <<locked>> | 86% | 41,118 psi | 68% | 2621 fps | 95.8% |
| ADI AR 2213 | <<locked>> | 92% | 44,817 psi | 74% | 2723 fps | 95.4% |
| ADI AR 2225 | <<locked>> | 98% | 35,302 psi | 58% | 2562 fps | 95.6% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 49,197 psi | 81% | 2700 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 38,522 psi | 63% | 2592 fps | 99.3% |
| Alliant Reloder-17 | <<locked>> | 80% | 44,150 psi | 72% | 2713 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 86% | 40,857 psi | 67% | 2615 fps | 95.8% |
| Alliant Reloder-22 | <<locked>> | 88% | 38,551 psi | 63% | 2608 fps | 95.2% |
| Alliant Reloder-23 | <<locked>> | 80% | 28,094 psi | 46% | 2346 fps | 97.6% |
| Alliant Reloder-25 | <<locked>> | 86% | 30,023 psi | 49% | 2415 fps | 95% |
| Alliant Reloder-26 | 78.6 gr | 80% | 30,197 psi | 50% | 2457 fps | 96.1% |
| Bofors RP15 | <<locked>> | 92% | 40,799 psi | 67% | 2654 fps | 95.8% |
| Bofors RP3 | <<locked>> | 80% | 49,617 psi | 81% | 2710 fps | 100% |
| Bofors RP30 | <<locked>> | 98% | 40,567 psi | 67% | 2677 fps | 95% |
| Bofors RP5 | <<locked>> | 88% | 38,551 psi | 63% | 2608 fps | 95.2% |
| Bofors RP7 | <<locked>> | 80% | 43,468 psi | 71% | 2595 fps | 97.5% |
| Hodgdon H1000 | <<locked>> | 96% | 41,046 psi | 67% | 2638 fps | 95.1% |
| Hodgdon H380 | <<locked>> | 80% | 49,980 psi | 82% | 2726 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 80% | 41,698 psi | 68% | 2628 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 80% | 44,599 psi | 73% | 2648 fps | 97.1% |
| Hodgdon H4831 | <<locked>> | 92% | 47,979 psi | 79% | 2733 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 92% | 47,094 psi | 77% | 2717 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 36,013 psi | 59% | 2480 fps | 99.6% |
| Hodgdon Retumbo | <<locked>> | 94% | 38,159 psi | 63% | 2671 fps | 95.5% |
| Hodgdon Superformance | <<locked>> | 80% | 40,785 psi | 67% | 2644 fps | 97.2% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,224 psi | 45% | 1572 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 51,126 psi | 84% | 2713 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 39,073 psi | 64% | 2523 fps | 96.4% |
| IMR 4451 Enduron | <<locked>> | 80% | 44,875 psi | 74% | 2621 fps | 98.2% |
| IMR 4831 | <<locked>> | 80% | 37,971 psi | 62% | 2530 fps | 99% |
| IMR 4955 Enduron | <<locked>> | 90% | 46,731 psi | 77% | 2674 fps | 95.6% |
| IMR 7828 SSC | <<locked>> | 94% | 45,861 psi | 75% | 2759 fps | 95.9% |
| Lovex S062 | <<locked>> | 80% | 51,227 psi | 84% | 2703 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 42,264 psi | 69% | 2572 fps | 98.8% |
| Lovex S070 | <<locked>> | 80% | 40,524 psi | 67% | 2556 fps | 97.5% |
| Lovex S071 | <<locked>> | 88% | 32,503 psi | 53% | 2405 fps | 95.8% |
| Norma 204 | <<locked>> | 82% | 41,495 psi | 68% | 2608 fps | 95.8% |
| Norma MRP | 80.1 gr | 84% | 35,114 psi | 58% | 2556 fps | 95.4% |
| Norma URP | <<locked>> | 80% | 39,363 psi | 65% | 2572 fps | 99.1% |
| Ramshot Grand | <<locked>> | 92% | 42,554 psi | 70% | 2703 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 38,261 psi | 63% | 2562 fps | 97.6% |
| Ramshot Magnum | <<locked>> | 92% | 37,681 psi | 62% | 2579 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,775 psi | 46% | 1611 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 49,995 psi | 82% | 2713 fps | 99.4% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 46,920 psi | 77% | 2762 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 39,566 psi | 65% | 2598 fps | 99% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 38,305 psi | 63% | 2608 fps | 98.6% |
| ReloadSwiss RS 76 | <<locked>> | 92% | 34,969 psi | 57% | 2585 fps | 95.3% |
| Rottweil R 903 | <<locked>> | 80% | 46,659 psi | 77% | 2661 fps | 100% |
| Rottweil R 904 | <<locked>> | 86% | 42,612 psi | 70% | 2605 fps | 95% |
| Rottweil R 905 | <<locked>> | 86% | 39,943 psi | 66% | 2598 fps | 95.7% |
| Rottweil R 907 | <<locked>> | 80% | 43,468 psi | 71% | 2595 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 42,264 psi | 69% | 2572 fps | 98.8% |
| Shooters World Precision | <<locked>> | 80% | 51,227 psi | 84% | 2703 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 40,524 psi | 67% | 2556 fps | 97.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 48,153 psi | 79% | 2717 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 47,718 psi | 78% | 2559 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 41,423 psi | 68% | 2520 fps | 97.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 86% | 39,581 psi | 65% | 2592 fps | 95.6% |
| Somchem S355 | <<locked>> | 80% | 46,847 psi | 77% | 2657 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 46,586 psi | 76% | 2651 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 35,897 psi | 59% | 2530 fps | 100% |
| Somchem S385 | <<locked>> | 82% | 35,433 psi | 58% | 2470 fps | 95% |
| Vihtavuori N135 | <<locked>> | 80% | 50,966 psi | 84% | 2641 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 44,817 psi | 74% | 2589 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 40,799 psi | 67% | 2572 fps | 99.3% |
| Vihtavuori N165 | <<locked>> | 88% | 37,376 psi | 61% | 2507 fps | 95.3% |
| Vihtavuori N550 | <<locked>> | 80% | 40,219 psi | 66% | 2572 fps | 99.1% |
| Vihtavuori N555 | <<locked>> | 80% | 31,270 psi | 51% | 2421 fps | 97.6% |
| Vihtavuori N560 | 87.7 gr | 92% | 47,007 psi | 77% | 2792 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 98% | 46,296 psi | 76% | 2766 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 39,972 psi | 66% | 2543 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 41,858 psi | 69% | 2631 fps | 97.7% |
| Winchester StaBALL HD | <<locked>> | 80% | 24,743 psi | 41% | 2320 fps | 96.6% |
| Winchester Supreme 780 | <<locked>> | 88% | 39,972 psi | 66% | 2566 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 85 powders for .338 Lapua Mag. loaded with the .338 | 220gr | Peregrine Glider GRM. Winchester StaBALL HD delivers the highest muzzle velocity at 2,953 fps; across all powders the maximum-charge window runs from 1,762 fps to 2,953 fps. ADI AR 2217 gives the best case fill at 100 %, and 85 of the 85 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 54–90 %, leaving at least 10 % headroom. The 220.0 gr projectile in 0.338" calls for a 1:11.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, 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, Vihtavuori N560 rank at the top here: for .338 Lapua Mag. with the .338 | 220gr | Peregrine Glider GRM they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, ADI AR 2217, Baschieri & Pellagri 109, Norma 217 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.