Load Specifications
Bullet Manufacturer:Peregrine
Bullet Weight:220 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:.338 Win Mag. load data
Case Length (l3):2.5"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:86 Grains of Water
Primer Size:Large Rifle (LR)
Barrel Length:24"
Max. allowed Pressure:62,366 psi
Recommended Twist Rate:1:11.0
Load data in caliber .338 Win Mag. with .338 | 220gr | Peregrine Glider GRM bullet and 105 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are ReloadSwiss RS 60, Alliant Power Pro 2000-MR and ReloadSwiss RS 52.
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 2015 | <<locked>> | 88% | 56,217 psi | 90% | 2569 fps | 100% |
| Accurate 2460 | <<locked>> | 84% | 54,737 psi | 88% | 2598 fps | 100% |
| Accurate 2495 | <<locked>> | 92% | 53,664 psi | 86% | 2589 fps | 100% |
| Accurate 2520 | <<locked>> | 86% | 52,750 psi | 85% | 2608 fps | 100% |
| Accurate 2700 | <<locked>> | 92% | 54,447 psi | 87% | 2589 fps | 96.4% |
| Accurate 4064 | <<locked>> | 94% | 53,737 psi | 86% | 2631 fps | 100% |
| Accurate 4350ᴾ | <<locked>> | 100% | 49,385 psi | 79% | 2648 fps | 98.9% |
| Accurate LT-30 | <<locked>> | 82% | 55,680 psi | 89% | 2520 fps | 100% |
| Accurate LT-32 | <<locked>> | 82% | 56,101 psi | 90% | 2543 fps | 100% |
| ADI AR 2206H | <<locked>> | 90% | 55,405 psi | 89% | 2667 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 96% | 56,362 psi | 90% | 2664 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 88% | 54,810 psi | 88% | 2625 fps | 100% |
| Alliant AR-Comp | <<locked>> | 88% | 54,810 psi | 88% | 2598 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 84% | 56,391 psi | 90% | 2723 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 92% | 55,071 psi | 88% | 2779 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 96% | 55,796 psi | 89% | 2684 fps | 100% |
| Alliant Reloder-10x | <<locked>> | 84% | 56,072 psi | 90% | 2575 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 92% | 53,272 psi | 85% | 2657 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 48,776 psi | 78% | 2657 fps | 99.1% |
| Alliant Reloder-17 | <<locked>> | 98% | 52,939 psi | 85% | 2749 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 34,272 psi | 55% | 2402 fps | 96.9% |
| Baschieri & Pellagri 106 | <<locked>> | 82% | 54,926 psi | 88% | 2520 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 90% | 55,419 psi | 89% | 2687 fps | 99.6% |
| Bofors RP3 | <<locked>> | 96% | 56,405 psi | 90% | 2700 fps | 100% |
| Bofors RP7 | <<locked>> | 98% | 53,388 psi | 86% | 2615 fps | 96.5% |
| Hodgdon Benchmark | <<locked>> | 86% | 53,490 psi | 86% | 2566 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 88% | 53,635 psi | 86% | 2654 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 86% | 55,709 psi | 89% | 2746 fps | 99.8% |
| Hodgdon H322 | <<locked>> | 84% | 55,579 psi | 89% | 2618 fps | 100% |
| Hodgdon H335 | <<locked>> | 82% | 52,823 psi | 85% | 2598 fps | 100% |
| Hodgdon H380 | <<locked>> | 94% | 54,012 psi | 87% | 2661 fps | 99.1% |
| Hodgdon H414ᴾ | <<locked>> | 100% | 53,113 psi | 85% | 2703 fps | 97.3% |
| Hodgdon H4350 | <<locked>> | 98% | 54,607 psi | 88% | 2674 fps | 96.1% |
| Hodgdon H4895 | <<locked>> | 90% | 55,912 psi | 90% | 2677 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 44,802 psi | 72% | 2546 fps | 99.4% |
| Hodgdon LEVERevolution | <<locked>> | 92% | 55,071 psi | 88% | 2710 fps | 100% |
| Hodgdon Superformanceᴾ | <<locked>> | 100% | 54,389 psi | 87% | 2740 fps | 96.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 34,853 psi | 56% | 1578 fps | 100% |
| Hodgdon VARGET | <<locked>> | 90% | 53,882 psi | 86% | 2631 fps | 100% |
| IMR 3031 | <<locked>> | 90% | 55,593 psi | 89% | 2661 fps | 100% |
| IMR 4064 | <<locked>> | 94% | 55,912 psi | 90% | 2648 fps | 99.8% |
| IMR 4166 Enduron | <<locked>> | 90% | 53,113 psi | 85% | 2585 fps | 97.1% |
| IMR 4198 | <<locked>> | 84% | 56,434 psi | 90% | 2536 fps | 100% |
| IMR 4350ᴾ | <<locked>> | 100% | 50,111 psi | 80% | 2592 fps | 95.9% |
| IMR 4451 Enduron | <<locked>> | 98% | 55,550 psi | 89% | 2651 fps | 97.4% |
| IMR 4831ᴾ | <<locked>> | 100% | 47,079 psi | 75% | 2595 fps | 98.6% |
| IMR 4895 | <<locked>> | 92% | 54,621 psi | 88% | 2687 fps | 99.9% |
| IMR 8208 XBR | <<locked>> | 88% | 54,810 psi | 88% | 2625 fps | 100% |
| Lovex D073.5 | <<locked>> | 84% | 54,650 psi | 88% | 2608 fps | 100% |
| Lovex D073.6 | <<locked>> | 90% | 54,795 psi | 88% | 2648 fps | 100% |
| Lovex S060 | <<locked>> | 90% | 55,550 psi | 89% | 2602 fps | 99.9% |
| Lovex S062 | <<locked>> | 94% | 55,230 psi | 89% | 2644 fps | 100% |
| Lovex S065ᴾ | <<locked>> | 100% | 54,433 psi | 87% | 2641 fps | 98.5% |
| Lovex S070ᴾ | <<locked>> | 100% | 51,793 psi | 83% | 2625 fps | 97.1% |
| Norma 201 | <<locked>> | 90% | 54,056 psi | 87% | 2615 fps | 100% |
| Norma 202 | <<locked>> | 90% | 54,621 psi | 88% | 2621 fps | 100% |
| Norma 203B | <<locked>> | 94% | 55,970 psi | 90% | 2697 fps | 99.9% |
| Norma URPᴾ | <<locked>> | 100% | 49,342 psi | 79% | 2644 fps | 98.8% |
| Ramshot Big Game | <<locked>> | 92% | 52,852 psi | 85% | 2671 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 48,399 psi | 78% | 2638 fps | 97.2% |
| Ramshot TAC | <<locked>> | 88% | 55,129 psi | 88% | 2644 fps | 98.7% |
| Ramshot Wild Boar | <<locked>> | 88% | 54,476 psi | 87% | 2661 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 86% | 55,985 psi | 90% | 2631 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 35,172 psi | 56% | 1617 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 84% | 54,418 psi | 87% | 2608 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 94% | 54,636 psi | 88% | 2644 fps | 97.9% |
| ReloadSwiss RS 52 | <<locked>> | 90% | 53,447 psi | 86% | 2720 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 96% | 52,910 psi | 85% | 2753 fps | 100% |
| ReloadSwiss RS 62ᴾ | <<locked>> | 100% | 49,298 psi | 79% | 2674 fps | 98.7% |
| ReloadSwiss RS 70ᴾ | <<locked>> | 100% | 50,067 psi | 80% | 2697 fps | 98.4% |
| Rottweil R 901 | <<locked>> | 88% | 54,955 psi | 88% | 2598 fps | 100% |
| Rottweil R 902 | <<locked>> | 92% | 54,404 psi | 87% | 2612 fps | 100% |
| Rottweil R 903 | <<locked>> | 98% | 56,014 psi | 90% | 2687 fps | 100% |
| Rottweil R 907 | <<locked>> | 98% | 53,388 psi | 86% | 2615 fps | 96.5% |
| Shooters World Long Rifleᴾ | <<locked>> | 100% | 54,433 psi | 87% | 2641 fps | 98.5% |
| Shooters World Match Rifle | <<locked>> | 90% | 54,795 psi | 88% | 2648 fps | 100% |
| Shooters World Precision | <<locked>> | 94% | 55,230 psi | 89% | 2644 fps | 100% |
| Shooters World SW4350ᴾ | <<locked>> | 100% | 51,793 psi | 83% | 2625 fps | 97.1% |
| Shooters World Tactical Rifle | <<locked>> | 82% | 53,867 psi | 86% | 2579 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 96% | 54,520 psi | 87% | 2700 fps | 99.9% |
| SNPE Vectan SP 3 | <<locked>> | 82% | 53,780 psi | 86% | 2552 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 88% | 53,113 psi | 85% | 2618 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 90% | 53,940 psi | 86% | 2644 fps | 99.8% |
| SNPE Vectan Tubal 3000 | <<locked>> | 90% | 56,086 psi | 90% | 2559 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 96% | 55,927 psi | 90% | 2559 fps | 100% |
| SNPE Vectan Tubal 7000ᴾ | <<locked>> | 100% | 55,172 psi | 88% | 2602 fps | 97.4% |
| Somchem S321 | <<locked>> | 86% | 55,811 psi | 89% | 2657 fps | 100% |
| Somchem S335 | <<locked>> | 90% | 55,172 psi | 88% | 2559 fps | 100% |
| Somchem S341 | <<locked>> | 88% | 52,779 psi | 85% | 2612 fps | 99.7% |
| Somchem S355 | <<locked>> | 96% | 53,098 psi | 85% | 2641 fps | 99.9% |
| Somchem S365ᴾ | <<locked>> | 100% | 43,801 psi | 70% | 2595 fps | 99.9% |
| Vihtavuori N130 | <<locked>> | 86% | 55,898 psi | 90% | 2526 fps | 100% |
| Vihtavuori N133 | <<locked>> | 90% | 56,188 psi | 90% | 2546 fps | 100% |
| Vihtavuori N135 | <<locked>> | 92% | 53,795 psi | 86% | 2579 fps | 100% |
| Vihtavuori N140 | <<locked>> | 92% | 55,288 psi | 89% | 2602 fps | 100% |
| Vihtavuori N150 | <<locked>> | 98% | 54,694 psi | 88% | 2621 fps | 100% |
| Vihtavuori N160ᴾ | <<locked>> | 100% | 51,822 psi | 83% | 2641 fps | 99% |
| Vihtavuori N530 | <<locked>> | 88% | 55,361 psi | 89% | 2628 fps | 100% |
| Vihtavuori N540 | <<locked>> | 92% | 53,330 psi | 86% | 2598 fps | 100% |
| Vihtavuori N550ᴾ | <<locked>> | 100% | 50,807 psi | 81% | 2648 fps | 98.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 36,506 psi | 59% | 2470 fps | 96.9% |
| Winchester 6.5 StaBALLᴾ | <<locked>> | 100% | 52,924 psi | 85% | 2631 fps | 100% |
| Winchester 748 | <<locked>> | 88% | 54,853 psi | 88% | 2671 fps | 100% |
| Winchester 760ᴾ | <<locked>> | 100% | 53,388 psi | 86% | 2707 fps | 97.3% |
| Winchester StaBALL Match | <<locked>> | 90% | 53,505 psi | 86% | 2648 fps | 100% |
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 2015 | <<locked>> | 80% | 43,830 psi | 70% | 2405 fps | 100% |
| Accurate 2460 | <<locked>> | 80% | 47,659 psi | 76% | 2503 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 35,955 psi | 58% | 2323 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 42,830 psi | 69% | 2461 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 47,790 psi | 77% | 2490 fps | 95% |
| Accurate 4064 | <<locked>> | 80% | 34,026 psi | 55% | 2310 fps | 99.7% |
| Accurate 4350 | <<locked>> | 90% | 34,664 psi | 56% | 2382 fps | 95.5% |
| Accurate LT-30 | <<locked>> | 80% | 52,388 psi | 84% | 2477 fps | 100% |
| Accurate LT-32 | <<locked>> | 80% | 52,808 psi | 85% | 2500 fps | 100% |
| ADI AR 2206H | <<locked>> | 80% | 40,350 psi | 65% | 2421 fps | 98.3% |
| ADI AR 2208 | <<locked>> | 80% | 34,316 psi | 55% | 2283 fps | 95.8% |
| ADI Benchmark 8208 | <<locked>> | 80% | 42,467 psi | 68% | 2434 fps | 99.4% |
| Alliant AR-Comp | <<locked>> | 80% | 41,887 psi | 67% | 2425 fps | 100% |
| Alliant Power Pro 1200-R | <<locked>> | 80% | 49,487 psi | 79% | 2621 fps | 99.8% |
| Alliant Power Pro 2000-MR | 53.9 gr | 80% | 36,405 psi | 58% | 2434 fps | 96.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 33,547 psi | 54% | 2303 fps | 97.4% |
| Alliant Reloder-10x | <<locked>> | 80% | 49,530 psi | 79% | 2490 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 36,114 psi | 58% | 2356 fps | 96.7% |
| Alliant Reloder-16 | <<locked>> | 90% | 35,679 psi | 57% | 2402 fps | 95.7% |
| Alliant Reloder-17 | <<locked>> | 82% | 30,821 psi | 49% | 2310 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 96% | 30,284 psi | 49% | 2300 fps | 95.1% |
| Baschieri & Pellagri 106 | <<locked>> | 80% | 51,416 psi | 82% | 2477 fps | 100% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 39,262 psi | 63% | 2421 fps | 97% |
| Bofors RP3 | <<locked>> | 80% | 32,634 psi | 52% | 2297 fps | 97.3% |
| Bofors RP7 | <<locked>> | 94% | 47,268 psi | 76% | 2520 fps | 95.2% |
| Hodgdon Benchmark | <<locked>> | 80% | 44,353 psi | 71% | 2428 fps | 99.8% |
| Hodgdon BL-C2 | <<locked>> | 80% | 40,712 psi | 65% | 2451 fps | 99.5% |
| Hodgdon CFE223 | <<locked>> | 80% | 45,020 psi | 72% | 2582 fps | 98.8% |
| Hodgdon H322 | <<locked>> | 80% | 48,515 psi | 78% | 2526 fps | 100% |
| Hodgdon H335 | <<locked>> | 80% | 49,472 psi | 79% | 2552 fps | 100% |
| Hodgdon H380 | <<locked>> | 82% | 36,245 psi | 58% | 2352 fps | 95.3% |
| Hodgdon H414 | <<locked>> | 94% | 43,453 psi | 70% | 2543 fps | 95% |
| Hodgdon H4350 | <<locked>> | 96% | 51,126 psi | 82% | 2621 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 40,669 psi | 65% | 2434 fps | 98.8% |
| Hodgdon Hybrid 100V | <<locked>> | 88% | 30,458 psi | 49% | 2251 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 36,637 psi | 59% | 2402 fps | 98.3% |
| Hodgdon Superformance | <<locked>> | 96% | 47,065 psi | 75% | 2621 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 25,773 psi | 41% | 1407 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 39,117 psi | 63% | 2388 fps | 98.4% |
| IMR 3031 | <<locked>> | 80% | 39,972 psi | 64% | 2434 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 35,969 psi | 58% | 2313 fps | 96.7% |
| IMR 4166 Enduron | <<locked>> | 86% | 46,688 psi | 75% | 2484 fps | 95.7% |
| IMR 4198 | <<locked>> | 80% | 50,343 psi | 81% | 2457 fps | 100% |
| IMR 4350 | <<locked>> | 98% | 46,963 psi | 75% | 2539 fps | 95.1% |
| IMR 4451 Enduron | <<locked>> | 92% | 46,296 psi | 74% | 2507 fps | 95.5% |
| IMR 4831 | <<locked>> | 90% | 33,707 psi | 54% | 2343 fps | 95.1% |
| IMR 4895 | <<locked>> | 80% | 36,999 psi | 59% | 2385 fps | 97.6% |
| IMR 8208 XBR | <<locked>> | 80% | 42,467 psi | 68% | 2434 fps | 99.4% |
| Lovex D073.5 | <<locked>> | 80% | 47,601 psi | 76% | 2513 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 38,740 psi | 62% | 2402 fps | 99.8% |
| Lovex S060 | <<locked>> | 80% | 40,843 psi | 65% | 2369 fps | 98.4% |
| Lovex S062 | <<locked>> | 80% | 35,621 psi | 57% | 2316 fps | 98.3% |
| Lovex S065 | <<locked>> | 90% | 39,900 psi | 64% | 2402 fps | 95.4% |
| Lovex S070 | <<locked>> | 94% | 42,743 psi | 69% | 2474 fps | 95% |
| Norma 201 | <<locked>> | 80% | 39,378 psi | 63% | 2379 fps | 99% |
| Norma 202 | <<locked>> | 80% | 39,726 psi | 64% | 2395 fps | 100% |
| Norma 203B | <<locked>> | 80% | 35,520 psi | 57% | 2349 fps | 97.1% |
| Norma URP | <<locked>> | 90% | 35,505 psi | 57% | 2388 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 34,983 psi | 56% | 2356 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 96% | 42,467 psi | 68% | 2533 fps | 95.6% |
| Ramshot TAC | <<locked>> | 80% | 42,395 psi | 68% | 2434 fps | 96.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 41,626 psi | 67% | 2454 fps | 98.5% |
| Ramshot X-Terminator | <<locked>> | 80% | 45,905 psi | 74% | 2480 fps | 99% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,150 psi | 42% | 1444 fps | 100% |
| ReloadSwiss RS 40 | <<locked>> | 80% | 47,718 psi | 77% | 2513 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 42,148 psi | 68% | 2441 fps | 95.2% |
| ReloadSwiss RS 52 | 52.2 gr | 80% | 37,405 psi | 60% | 2444 fps | 97.1% |
| ReloadSwiss RS 60 | 53.1 gr | 80% | 30,806 psi | 49% | 2323 fps | 98.2% |
| ReloadSwiss RS 62 | <<locked>> | 92% | 37,333 psi | 60% | 2457 fps | 95.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 38,087 psi | 61% | 2467 fps | 95% |
| Rottweil R 901 | <<locked>> | 80% | 43,163 psi | 69% | 2421 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 37,463 psi | 60% | 2336 fps | 98.7% |
| Rottweil R 903 | <<locked>> | 80% | 30,676 psi | 49% | 2244 fps | 96.2% |
| Rottweil R 907 | <<locked>> | 94% | 47,268 psi | 76% | 2520 fps | 95.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 39,900 psi | 64% | 2402 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 38,740 psi | 62% | 2402 fps | 99.8% |
| Shooters World Precision | <<locked>> | 80% | 35,621 psi | 57% | 2316 fps | 98.3% |
| Shooters World SW4350 | <<locked>> | 94% | 42,743 psi | 69% | 2474 fps | 95% |
| Shooters World Tactical Rifle | <<locked>> | 80% | 50,401 psi | 81% | 2530 fps | 99.9% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 31,923 psi | 51% | 2290 fps | 95.6% |
| SNPE Vectan SP 3 | <<locked>> | 80% | 50,488 psi | 81% | 2510 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 40,292 psi | 65% | 2408 fps | 96.4% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 38,769 psi | 62% | 2392 fps | 97.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 41,017 psi | 66% | 2343 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 33,765 psi | 54% | 2218 fps | 99.9% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 45,063 psi | 72% | 2451 fps | 95.3% |
| Somchem S321 | <<locked>> | 80% | 45,513 psi | 73% | 2507 fps | 99.8% |
| Somchem S335 | <<locked>> | 80% | 40,567 psi | 65% | 2346 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 39,972 psi | 64% | 2405 fps | 98.1% |
| Somchem S355 | <<locked>> | 80% | 31,865 psi | 51% | 2257 fps | 96.4% |
| Somchem S365 | <<locked>> | 86% | 27,717 psi | 44% | 2238 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 80% | 46,528 psi | 75% | 2405 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 41,292 psi | 66% | 2343 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 36,579 psi | 59% | 2323 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 37,405 psi | 60% | 2329 fps | 99.9% |
| Vihtavuori N150 | <<locked>> | 80% | 30,139 psi | 48% | 2198 fps | 97.2% |
| Vihtavuori N160 | <<locked>> | 88% | 35,027 psi | 56% | 2346 fps | 95.2% |
| Vihtavuori N530 | <<locked>> | 80% | 42,279 psi | 68% | 2428 fps | 99.4% |
| Vihtavuori N540 | <<locked>> | 80% | 36,027 psi | 58% | 2323 fps | 99.7% |
| Vihtavuori N550 | <<locked>> | 90% | 36,564 psi | 59% | 2395 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 96% | 31,981 psi | 51% | 2365 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 84% | 30,937 psi | 50% | 2228 fps | 95.8% |
| Winchester 748 | <<locked>> | 80% | 41,713 psi | 67% | 2470 fps | 99.8% |
| Winchester 760 | <<locked>> | 94% | 43,685 psi | 70% | 2549 fps | 95.1% |
| Winchester StaBALL Match | <<locked>> | 80% | 38,014 psi | 61% | 2392 fps | 98.3% |
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 116 powders for .338 Win Mag. loaded with the .338 | 220gr | Peregrine Glider GRM. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 2,779 fps; across all powders the maximum-charge window runs from 1,578 fps to 2,779 fps. Accurate 3100 gives the best case fill at 100 %, and 116 of the 116 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 49–90 %, 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. Accurate 3100, Accurate 4350, ADI AR 2209 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. ReloadSwiss RS 60, Alliant Power Pro 2000-MR, ReloadSwiss RS 52 rank at the top here: for .338 Win 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, Accurate 3100, ADI AR 2209, Alliant Reloder-19 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.