Load Specifications
Load data in caliber .300 Lapua Mag. with .308 | 226gr | Peregrine Glider GRM bullet and 74 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Hodgdon Retumbo, ReloadSwiss RS 76 and Winchester StaBALL HD.
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 3100 | <<locked>> | 92% | 52,707 psi | 87% | 2608 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 54,244 psi | 89% | 2631 fps | 100% |
| Accurate High Country | <<locked>> | 90% | 54,534 psi | 90% | 2759 fps | 99.8% |
| Accurate MAGPRO | <<locked>> | 90% | 51,474 psi | 85% | 2707 fps | 98.9% |
| ADI AR 2209 | <<locked>> | 90% | 55,100 psi | 90% | 2694 fps | 100% |
| ADI AR 2213 | <<locked>> | 92% | 52,895 psi | 87% | 2707 fps | 99.6% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 50,720 psi | 83% | 2674 fps | 99.6% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 45,063 psi | 74% | 2638 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 88% | 51,895 psi | 85% | 2644 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 84% | 52,025 psi | 85% | 2635 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 90% | 54,679 psi | 90% | 2687 fps | 100% |
| Alliant Reloder-22 | <<locked>> | 92% | 53,011 psi | 87% | 2703 fps | 100% |
| Alliant Reloder-23 | <<locked>> | 94% | 54,288 psi | 89% | 2664 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 98% | 53,621 psi | 88% | 2730 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 90% | 54,621 psi | 90% | 2753 fps | 100% |
| Alliant Reloder-33ᴾ | <<locked>> | 100% | 46,775 psi | 77% | 2690 fps | 96.4% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 54,447 psi | 89% | 2674 fps | 97.9% |
| Bofors RP15 | <<locked>> | 94% | 52,243 psi | 86% | 2690 fps | 99.9% |
| Bofors RP30ᴾ | <<locked>> | 100% | 53,084 psi | 87% | 2736 fps | 99.9% |
| Bofors RP5 | <<locked>> | 92% | 53,011 psi | 87% | 2703 fps | 100% |
| Bofors RP7 | <<locked>> | 82% | 53,098 psi | 87% | 2585 fps | 100% |
| Hodgdon H1000 | <<locked>> | 98% | 52,185 psi | 86% | 2697 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 82% | 52,475 psi | 86% | 2635 fps | 100% |
| Hodgdon H4350 | <<locked>> | 82% | 54,969 psi | 90% | 2644 fps | 100% |
| Hodgdon H4831 | <<locked>> | 90% | 52,779 psi | 87% | 2648 fps | 99.2% |
| Hodgdon H4831 SC | <<locked>> | 90% | 51,866 psi | 85% | 2635 fps | 99.1% |
| Hodgdon Hybrid 100V | <<locked>> | 86% | 52,025 psi | 85% | 2562 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 98% | 52,518 psi | 86% | 2805 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 52,431 psi | 86% | 2671 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,159 psi | 61% | 1631 fps | 100% |
| IMR 4350 | <<locked>> | 86% | 54,708 psi | 90% | 2625 fps | 100% |
| IMR 4451 Enduron | <<locked>> | 82% | 54,578 psi | 90% | 2605 fps | 100% |
| IMR 4831 | <<locked>> | 86% | 54,752 psi | 90% | 2625 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 90% | 53,809 psi | 88% | 2628 fps | 99.4% |
| IMR 7828 SSC | <<locked>> | 94% | 54,679 psi | 90% | 2743 fps | 99.8% |
| IMR 8133 Enduronᴾ | <<locked>> | 100% | 40,669 psi | 67% | 2556 fps | 98.2% |
| Lovex S065 | <<locked>> | 82% | 51,837 psi | 85% | 2556 fps | 100% |
| Lovex S070 | <<locked>> | 84% | 53,432 psi | 88% | 2602 fps | 100% |
| Lovex S071 | <<locked>> | 98% | 54,128 psi | 89% | 2628 fps | 100% |
| Norma 204 | <<locked>> | 84% | 51,924 psi | 85% | 2625 fps | 99.8% |
| Norma 217ᴾ | <<locked>> | 100% | 40,814 psi | 67% | 2579 fps | 99.7% |
| Norma MRP | <<locked>> | 90% | 52,779 psi | 87% | 2720 fps | 100% |
| Norma URP | <<locked>> | 84% | 52,953 psi | 87% | 2618 fps | 100% |
| Ramshot Grand | <<locked>> | 92% | 51,445 psi | 84% | 2707 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 51,605 psi | 85% | 2625 fps | 100% |
| Ramshot Magnum | <<locked>> | 96% | 53,330 psi | 88% | 2694 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 38,000 psi | 62% | 1670 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 54,259 psi | 89% | 2654 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 84% | 52,634 psi | 86% | 2684 fps | 100% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 52,924 psi | 87% | 2802 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 51,692 psi | 85% | 2762 fps | 99.2% |
| Rottweil R 904 | <<locked>> | 88% | 52,939 psi | 87% | 2618 fps | 99.5% |
| Rottweil R 905 | <<locked>> | 90% | 54,230 psi | 89% | 2677 fps | 100% |
| Rottweil R 907 | <<locked>> | 82% | 53,098 psi | 87% | 2585 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 82% | 51,837 psi | 85% | 2556 fps | 100% |
| Shooters World SW4350 | <<locked>> | 84% | 53,432 psi | 88% | 2602 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 84% | 54,186 psi | 89% | 2559 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 53,824 psi | 88% | 2671 fps | 100% |
| Somchem S361 | <<locked>> | 88% | 54,099 psi | 89% | 2612 fps | 99.3% |
| Somchem S365 | <<locked>> | 86% | 53,287 psi | 87% | 2618 fps | 100% |
| Somchem S385 | <<locked>> | 90% | 54,621 psi | 90% | 2648 fps | 100% |
| Vihtavuori N160 | <<locked>> | 84% | 54,650 psi | 90% | 2608 fps | 100% |
| Vihtavuori N165 | <<locked>> | 94% | 54,288 psi | 89% | 2635 fps | 100% |
| Vihtavuori N170 | <<locked>> | 98% | 52,475 psi | 86% | 2644 fps | 95.9% |
| Vihtavuori N550 | <<locked>> | 84% | 53,563 psi | 88% | 2615 fps | 100% |
| Vihtavuori N555 | <<locked>> | 90% | 52,924 psi | 87% | 2641 fps | 100% |
| Vihtavuori N560 | <<locked>> | 90% | 52,634 psi | 86% | 2720 fps | 99.4% |
| Vihtavuori N565 | <<locked>> | 96% | 52,431 psi | 86% | 2703 fps | 99.5% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 52,736 psi | 87% | 2762 fps | 98.9% |
| Vihtavuori N570ᴾ | <<locked>> | 100% | 49,806 psi | 82% | 2756 fps | 96.8% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 53,824 psi | 88% | 2566 fps | 100% |
| Winchester 760 | <<locked>> | 82% | 52,475 psi | 86% | 2635 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 94% | 52,141 psi | 86% | 2746 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 92% | 54,331 psi | 89% | 2644 fps | 100% |
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 3100 | <<locked>> | 80% | 35,041 psi | 58% | 2310 fps | 99.2% |
| Accurate 4350 | <<locked>> | 80% | 47,181 psi | 77% | 2530 fps | 100% |
| Accurate High Country | <<locked>> | 80% | 38,377 psi | 63% | 2474 fps | 97.3% |
| Accurate MAGPRO | <<locked>> | 80% | 36,114 psi | 59% | 2418 fps | 95.1% |
| ADI AR 2209 | <<locked>> | 80% | 39,494 psi | 65% | 2434 fps | 98.4% |
| ADI AR 2213 | <<locked>> | 80% | 35,143 psi | 58% | 2372 fps | 95.8% |
| ADI AR 2217 | <<locked>> | 88% | 33,924 psi | 56% | 2346 fps | 95.7% |
| ADI AR 2225 | <<locked>> | 84% | 26,687 psi | 44% | 2201 fps | 95.4% |
| Alliant Power Pro Varmint | <<locked>> | 80% | 39,813 psi | 65% | 2434 fps | 98.4% |
| Alliant Reloder-16 | <<locked>> | 80% | 45,469 psi | 75% | 2536 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 39,450 psi | 65% | 2428 fps | 98.4% |
| Alliant Reloder-22 | <<locked>> | 80% | 35,230 psi | 58% | 2379 fps | 97.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 33,953 psi | 56% | 2336 fps | 100% |
| Alliant Reloder-25 | <<locked>> | 80% | 29,370 psi | 48% | 2267 fps | 98.5% |
| Alliant Reloder-26 | <<locked>> | 80% | 37,275 psi | 61% | 2477 fps | 100% |
| Alliant Reloder-33 | <<locked>> | 98% | 43,337 psi | 71% | 2625 fps | 95.4% |
| Baschieri & Pellagri 109 | <<locked>> | 86% | 42,496 psi | 70% | 2464 fps | 95% |
| Bofors RP15 | <<locked>> | 80% | 32,822 psi | 54% | 2323 fps | 96.4% |
| Bofors RP30 | <<locked>> | 86% | 32,837 psi | 54% | 2359 fps | 95.8% |
| Bofors RP5 | <<locked>> | 80% | 35,230 psi | 58% | 2379 fps | 97.4% |
| Bofors RP7 | <<locked>> | 80% | 49,806 psi | 82% | 2536 fps | 100% |
| Hodgdon H1000 | <<locked>> | 84% | 32,300 psi | 53% | 2306 fps | 95.6% |
| Hodgdon H414 | <<locked>> | 80% | 48,994 psi | 80% | 2582 fps | 100% |
| Hodgdon H4350 | <<locked>> | 80% | 51,619 psi | 85% | 2595 fps | 99.9% |
| Hodgdon H4831 | <<locked>> | 80% | 37,550 psi | 62% | 2379 fps | 96% |
| Hodgdon H4831 SC | <<locked>> | 80% | 36,854 psi | 61% | 2362 fps | 95.8% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 42,757 psi | 70% | 2425 fps | 100% |
| Hodgdon Retumbo | 61.1 gr | 80% | 28,601 psi | 47% | 2283 fps | 95% |
| Hodgdon Superformance | <<locked>> | 80% | 48,675 psi | 80% | 2615 fps | 100% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,847 psi | 46% | 1457 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 45,310 psi | 74% | 2477 fps | 99.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 51,285 psi | 84% | 2556 fps | 100% |
| IMR 4831 | <<locked>> | 80% | 44,889 psi | 74% | 2480 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 80% | 39,291 psi | 65% | 2379 fps | 96.7% |
| IMR 7828 SSC | <<locked>> | 80% | 33,808 psi | 56% | 2352 fps | 95.4% |
| IMR 8133 Enduron | <<locked>> | 94% | 33,228 psi | 55% | 2392 fps | 95.7% |
| Lovex S065 | <<locked>> | 80% | 48,689 psi | 80% | 2507 fps | 100% |
| Lovex S070 | <<locked>> | 80% | 47,079 psi | 77% | 2507 fps | 100% |
| Lovex S071 | <<locked>> | 80% | 30,110 psi | 49% | 2198 fps | 98% |
| Norma 204 | <<locked>> | 80% | 45,397 psi | 75% | 2520 fps | 99.2% |
| Norma 217 | <<locked>> | 88% | 27,195 psi | 45% | 2247 fps | 95.2% |
| Norma MRP | <<locked>> | 80% | 36,941 psi | 61% | 2444 fps | 99% |
| Norma URP | <<locked>> | 80% | 46,485 psi | 76% | 2520 fps | 100% |
| Ramshot Grand | <<locked>> | 80% | 33,141 psi | 54% | 2352 fps | 95.6% |
| Ramshot Hunter | <<locked>> | 80% | 45,208 psi | 74% | 2523 fps | 100% |
| Ramshot Magnum | <<locked>> | 80% | 29,428 psi | 48% | 2244 fps | 96% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,500 psi | 47% | 1493 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 47,224 psi | 78% | 2556 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 45,614 psi | 75% | 2579 fps | 100% |
| ReloadSwiss RS 76 | 65.4 gr | 80% | 27,441 psi | 45% | 2254 fps | 95.7% |
| ReloadSwiss RS 80 | <<locked>> | 90% | 35,288 psi | 58% | 2451 fps | 95% |
| Rottweil R 904 | <<locked>> | 80% | 40,872 psi | 67% | 2415 fps | 97.7% |
| Rottweil R 905 | <<locked>> | 80% | 38,856 psi | 64% | 2418 fps | 98.4% |
| Rottweil R 907 | <<locked>> | 80% | 49,806 psi | 82% | 2536 fps | 100% |
| Shooters World Long Rifle | <<locked>> | 80% | 48,689 psi | 80% | 2507 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 47,079 psi | 77% | 2507 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 47,659 psi | 78% | 2464 fps | 100% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 38,537 psi | 63% | 2411 fps | 98.3% |
| Somchem S361 | <<locked>> | 80% | 41,365 psi | 68% | 2402 fps | 97.1% |
| Somchem S365 | <<locked>> | 80% | 43,511 psi | 71% | 2477 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 39,262 psi | 64% | 2398 fps | 99% |
| Vihtavuori N160 | <<locked>> | 80% | 47,834 psi | 79% | 2510 fps | 100% |
| Vihtavuori N165 | <<locked>> | 80% | 33,968 psi | 56% | 2283 fps | 97.5% |
| Vihtavuori N170 | <<locked>> | 96% | 49,182 psi | 81% | 2592 fps | 95.1% |
| Vihtavuori N550 | <<locked>> | 80% | 46,992 psi | 77% | 2516 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 37,956 psi | 62% | 2402 fps | 100% |
| Vihtavuori N560 | <<locked>> | 80% | 37,130 psi | 61% | 2438 fps | 96.2% |
| Vihtavuori N565 | <<locked>> | 84% | 34,650 psi | 57% | 2375 fps | 95.6% |
| Vihtavuori N568 | <<locked>> | 90% | 37,014 psi | 61% | 2470 fps | 95% |
| Vihtavuori N570 | <<locked>> | 96% | 43,337 psi | 71% | 2635 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 46,833 psi | 77% | 2474 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 49,211 psi | 81% | 2589 fps | 100% |
| Winchester StaBALL HD | 62.8 gr | 80% | 30,008 psi | 49% | 2372 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 80% | 35,824 psi | 59% | 2329 fps | 97.4% |
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 74 powders for .300 Lapua Mag. loaded with the .308 | 226gr | Peregrine Glider GRM. Hodgdon Retumbo delivers the highest muzzle velocity at 2,805 fps; across all powders the maximum-charge window runs from 1,631 fps to 2,805 fps. ADI AR 2217 gives the best case fill at 100 %, and 74 of the 74 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (420 MPa), the top charges use 61–90 %, leaving at least 10 % headroom. The 226.0 gr projectile in 0.308" calls for a 1:8.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-33 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. Hodgdon Retumbo, ReloadSwiss RS 76, Winchester StaBALL HD rank at the top here: for .300 Lapua Mag. with the .308 | 226gr | Peregrine Glider GRM 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.