Load Specifications
Bullet:.338 | 172gr | Sax KDG-S
Bullet Manufacturer:Sax
Bullet Weight:172 gr
Bullet Diameter:0.338"
Bullet Length:<<locked>>
Caliber:.338 Rem. Ultra Mag. load data
Case Length (l3):2.76"
Cartridge Length (C.O.L.):<<locked>>
Case Capacity:110 Grains of Water
Primer Size:Large Rifle Magnum (LRM)
Barrel Length:24"
Max. allowed Pressure:63,817 psi
Recommended Twist Rate:1:14.5
Load data in caliber .338 Rem. Ultra Mag. with .338 | 172gr | Sax KDG-S bullet and 98 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 Reloder-16 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 2015 | <<locked>> | 82% | 56,739 psi | 89% | 2943 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 56,391 psi | 88% | 2966 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 56,231 psi | 88% | 3018 fps | 100% |
| Accurate 2700 | <<locked>> | 90% | 56,188 psi | 88% | 2966 fps | 97.5% |
| Accurate 3100ᴾ | <<locked>> | 100% | 47,819 psi | 75% | 2920 fps | 97.7% |
| Accurate 4064 | <<locked>> | 88% | 56,710 psi | 89% | 3018 fps | 100% |
| Accurate 4350 | <<locked>> | 96% | 57,551 psi | 90% | 3110 fps | 99.9% |
| ADI AR 2206H | <<locked>> | 84% | 56,086 psi | 88% | 3048 fps | 100% |
| ADI AR 2208 | <<locked>> | 90% | 57,290 psi | 90% | 3048 fps | 99.9% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 55,056 psi | 86% | 3077 fps | 96.5% |
| ADI Benchmark 8208 | <<locked>> | 82% | 54,723 psi | 86% | 2992 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 56,231 psi | 88% | 2972 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 56,550 psi | 89% | 3173 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 54,288 psi | 85% | 3022 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 54,650 psi | 86% | 3041 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 96% | 54,346 psi | 85% | 3110 fps | 99.9% |
| Alliant Reloder-17 | <<locked>> | 92% | 55,825 psi | 87% | 3143 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 54,143 psi | 85% | 3064 fps | 96.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 44,962 psi | 70% | 2946 fps | 99.7% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 51,576 psi | 81% | 3133 fps | 99.6% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 56,275 psi | 88% | 3058 fps | 99.8% |
| Bofors RP3 | <<locked>> | 88% | 55,085 psi | 86% | 3035 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 54,839 psi | 86% | 3002 fps | 97.5% |
| Hodgdon Benchmark | <<locked>> | 82% | 56,115 psi | 88% | 2976 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 54,766 psi | 86% | 3022 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 55,825 psi | 87% | 3048 fps | 99.5% |
| Hodgdon H414 | <<locked>> | 94% | 56,217 psi | 88% | 3104 fps | 98.4% |
| Hodgdon H4350 | <<locked>> | 92% | 56,173 psi | 88% | 3061 fps | 97.1% |
| Hodgdon H4895 | <<locked>> | 84% | 56,666 psi | 89% | 3058 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 54,563 psi | 86% | 3031 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 86% | 56,913 psi | 89% | 3091 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 57,000 psi | 89% | 3136 fps | 98.3% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,737 psi | 56% | 1929 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 54,360 psi | 85% | 3009 fps | 100% |
| IMR 3031 | <<locked>> | 84% | 57,014 psi | 89% | 3041 fps | 100% |
| IMR 4064 | <<locked>> | 88% | 56,768 psi | 89% | 3031 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 86% | 56,231 psi | 88% | 3009 fps | 98.2% |
| IMR 4350 | <<locked>> | 96% | 55,579 psi | 87% | 3028 fps | 97.7% |
| IMR 4451 Enduron | <<locked>> | 92% | 56,521 psi | 89% | 3035 fps | 98.2% |
| IMR 4831 | <<locked>> | 96% | 54,099 psi | 85% | 3041 fps | 99.7% |
| IMR 4895 | <<locked>> | 86% | 56,086 psi | 88% | 3074 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 54,723 psi | 86% | 2992 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 56,405 psi | 88% | 3022 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 55,172 psi | 86% | 2972 fps | 100% |
| Lovex S062 | <<locked>> | 88% | 56,666 psi | 89% | 3025 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 56,449 psi | 88% | 3028 fps | 99.2% |
| Lovex S070 | <<locked>> | 96% | 57,609 psi | 90% | 3068 fps | 98.6% |
| Norma 201 | <<locked>> | 84% | 54,810 psi | 86% | 2992 fps | 100% |
| Norma 202 | <<locked>> | 84% | 55,463 psi | 87% | 2992 fps | 100% |
| Norma 203B | <<locked>> | 88% | 57,537 psi | 90% | 3081 fps | 100% |
| Norma 204 | <<locked>> | 96% | 56,652 psi | 89% | 3084 fps | 96.7% |
| Norma MRPᴾ | <<locked>> | 100% | 50,763 psi | 80% | 3081 fps | 97.4% |
| Norma URP | <<locked>> | 96% | 56,014 psi | 88% | 3091 fps | 99.8% |
| Ramshot Big Game | <<locked>> | 86% | 54,766 psi | 86% | 3048 fps | 100% |
| Ramshot Hunter | <<locked>> | 96% | 55,143 psi | 86% | 3087 fps | 98.9% |
| Ramshot TAC | <<locked>> | 82% | 55,085 psi | 86% | 3009 fps | 99.1% |
| Ramshot Wild Boar | <<locked>> | 82% | 55,013 psi | 86% | 3028 fps | 100% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,318 psi | 57% | 1975 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 55,898 psi | 88% | 3025 fps | 98.6% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 55,216 psi | 87% | 3107 fps | 99.9% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 55,477 psi | 87% | 3143 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 57,319 psi | 90% | 3123 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 56,304 psi | 88% | 3156 fps | 99.7% |
| Rottweil R 901 | <<locked>> | 82% | 55,564 psi | 87% | 2976 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 55,274 psi | 87% | 2989 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 55,085 psi | 86% | 3025 fps | 100% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 53,040 psi | 83% | 3045 fps | 96.4% |
| Rottweil R 907 | <<locked>> | 92% | 54,839 psi | 86% | 3002 fps | 97.5% |
| Shooters World Long Rifle | <<locked>> | 94% | 56,449 psi | 88% | 3028 fps | 99.2% |
| Shooters World Match Rifle | <<locked>> | 84% | 56,405 psi | 88% | 3022 fps | 100% |
| Shooters World Precision | <<locked>> | 88% | 56,666 psi | 89% | 3025 fps | 100% |
| Shooters World SW4350 | <<locked>> | 96% | 57,609 psi | 90% | 3068 fps | 98.6% |
| SNPE Vectan SP 11 | <<locked>> | 90% | 56,768 psi | 89% | 3084 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 57,595 psi | 90% | 3045 fps | 99.6% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 54,563 psi | 86% | 3012 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 55,927 psi | 88% | 2930 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 90% | 56,637 psi | 89% | 2923 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 94% | 56,623 psi | 89% | 2979 fps | 98.3% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 52,591 psi | 82% | 3038 fps | 96.3% |
| Somchem S335 | <<locked>> | 84% | 55,492 psi | 87% | 2923 fps | 100% |
| Somchem S341 | <<locked>> | 84% | 57,334 psi | 90% | 3031 fps | 100% |
| Somchem S355 | <<locked>> | 90% | 55,114 psi | 86% | 3022 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 54,868 psi | 86% | 3094 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 54,041 psi | 85% | 3025 fps | 97.4% |
| Vihtavuori N133 | <<locked>> | 84% | 56,275 psi | 88% | 2913 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 55,303 psi | 87% | 2953 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 56,130 psi | 88% | 2969 fps | 100% |
| Vihtavuori N150 | <<locked>> | 92% | 56,608 psi | 89% | 2995 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 54,781 psi | 86% | 3031 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 82% | 55,216 psi | 87% | 2992 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 54,288 psi | 85% | 2959 fps | 100% |
| Vihtavuori N550 | <<locked>> | 96% | 57,638 psi | 90% | 3091 fps | 99.8% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 50,198 psi | 79% | 3028 fps | 99.6% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 54,868 psi | 86% | 2999 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 55,695 psi | 87% | 3041 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 56,449 psi | 88% | 3104 fps | 98.4% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 40,582 psi | 64% | 2972 fps | 99.9% |
| Winchester StaBALL Match | <<locked>> | 84% | 54,795 psi | 86% | 3022 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% | 53,287 psi | 84% | 2897 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,224 psi | 72% | 2822 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 52,388 psi | 82% | 2963 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 46,137 psi | 72% | 2799 fps | 95.3% |
| Accurate 3100 | <<locked>> | 94% | 38,754 psi | 61% | 2743 fps | 95.2% |
| Accurate 4064 | <<locked>> | 80% | 43,714 psi | 69% | 2815 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 34,983 psi | 55% | 2687 fps | 95.6% |
| ADI AR 2206H | <<locked>> | 80% | 49,429 psi | 77% | 2940 fps | 99.7% |
| ADI AR 2208 | <<locked>> | 80% | 41,901 psi | 66% | 2779 fps | 98.2% |
| ADI AR 2209 | <<locked>> | 98% | 51,648 psi | 81% | 3022 fps | 95.7% |
| ADI Benchmark 8208 | <<locked>> | 80% | 51,474 psi | 81% | 2943 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 52,446 psi | 82% | 2923 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 45,600 psi | 71% | 2979 fps | 99% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,930 psi | 66% | 2805 fps | 99.3% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,991 psi | 71% | 2874 fps | 98.9% |
| Alliant Reloder-16 | 70.9 gr | 82% | 34,635 psi | 54% | 2700 fps | 95.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 36,550 psi | 57% | 2776 fps | 98.1% |
| Alliant Reloder-19 | <<locked>> | 98% | 50,691 psi | 79% | 3005 fps | 95.7% |
| Alliant Reloder-23 | <<locked>> | 88% | 30,574 psi | 48% | 2605 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 90% | 35,578 psi | 56% | 2789 fps | 95.3% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 49,110 psi | 77% | 2943 fps | 99.2% |
| Bofors RP3 | <<locked>> | 80% | 41,945 psi | 66% | 2808 fps | 99.4% |
| Bofors RP7 | <<locked>> | 86% | 45,353 psi | 71% | 2835 fps | 95.3% |
| Hodgdon Benchmark | <<locked>> | 80% | 52,866 psi | 83% | 2927 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 51,097 psi | 80% | 2966 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 42,627 psi | 67% | 2815 fps | 97.4% |
| Hodgdon H414 | <<locked>> | 86% | 42,815 psi | 67% | 2861 fps | 95.3% |
| Hodgdon H4350 | <<locked>> | 88% | 49,298 psi | 77% | 2943 fps | 95.6% |
| Hodgdon H4895 | <<locked>> | 80% | 49,922 psi | 78% | 2953 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 29,921 psi | 47% | 2536 fps | 95.5% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 46,253 psi | 72% | 2920 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 88% | 45,672 psi | 72% | 2936 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,585 psi | 42% | 1732 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 47,688 psi | 75% | 2897 fps | 99.7% |
| IMR 3031 | <<locked>> | 80% | 50,024 psi | 78% | 2943 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 44,019 psi | 69% | 2818 fps | 98.8% |
| IMR 4166 Enduron | <<locked>> | 80% | 46,499 psi | 73% | 2838 fps | 96.2% |
| IMR 4350 | <<locked>> | 90% | 45,876 psi | 72% | 2861 fps | 95.5% |
| IMR 4451 Enduron | <<locked>> | 84% | 44,019 psi | 69% | 2812 fps | 95.4% |
| IMR 4831 | <<locked>> | 82% | 33,895 psi | 53% | 2644 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 46,151 psi | 72% | 2907 fps | 99.4% |
| IMR 8208 XBR | <<locked>> | 80% | 51,474 psi | 81% | 2943 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 49,168 psi | 77% | 2913 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 48,675 psi | 76% | 2867 fps | 99.6% |
| Lovex S062 | <<locked>> | 80% | 44,048 psi | 69% | 2818 fps | 99.7% |
| Lovex S065 | <<locked>> | 82% | 38,769 psi | 61% | 2703 fps | 95.4% |
| Lovex S070 | <<locked>> | 86% | 41,989 psi | 66% | 2789 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 48,211 psi | 76% | 2887 fps | 100% |
| Norma 202 | <<locked>> | 80% | 48,762 psi | 76% | 2890 fps | 100% |
| Norma 203B | <<locked>> | 80% | 44,382 psi | 70% | 2861 fps | 99.2% |
| Norma 204 | <<locked>> | 92% | 49,197 psi | 77% | 2959 fps | 95% |
| Norma MRP | <<locked>> | 96% | 44,106 psi | 69% | 2953 fps | 95.6% |
| Norma URP | <<locked>> | 82% | 35,027 psi | 55% | 2687 fps | 95.5% |
| Ramshot Big Game | <<locked>> | 80% | 44,367 psi | 70% | 2874 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 86% | 39,218 psi | 61% | 2789 fps | 95.1% |
| Ramshot TAC | <<locked>> | 80% | 51,547 psi | 81% | 2949 fps | 98.6% |
| Ramshot Wild Boar | <<locked>> | 80% | 51,416 psi | 81% | 2969 fps | 99.8% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,035 psi | 42% | 1775 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 42,815 psi | 67% | 2792 fps | 95.9% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 48,109 psi | 75% | 2989 fps | 99.3% |
| ReloadSwiss RS 60 | 74.5 gr | 80% | 38,885 psi | 61% | 2844 fps | 99.9% |
| ReloadSwiss RS 62 | <<locked>> | 82% | 34,780 psi | 55% | 2700 fps | 95.1% |
| ReloadSwiss RS 70 | 79.5 gr | 84% | 36,999 psi | 58% | 2769 fps | 95.3% |
| Rottweil R 901 | <<locked>> | 80% | 52,257 psi | 82% | 2927 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,919 psi | 72% | 2838 fps | 99.8% |
| Rottweil R 903 | <<locked>> | 80% | 39,465 psi | 62% | 2753 fps | 98.8% |
| Rottweil R 905 | <<locked>> | 98% | 49,705 psi | 78% | 2989 fps | 95.6% |
| Rottweil R 907 | <<locked>> | 86% | 45,353 psi | 71% | 2835 fps | 95.3% |
| Shooters World Long Rifle | <<locked>> | 82% | 38,769 psi | 61% | 2703 fps | 95.4% |
| Shooters World Match Rifle | <<locked>> | 80% | 49,168 psi | 77% | 2913 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 44,048 psi | 69% | 2818 fps | 99.7% |
| Shooters World SW4350 | <<locked>> | 86% | 41,989 psi | 66% | 2789 fps | 95.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 40,567 psi | 64% | 2802 fps | 98.4% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 50,111 psi | 79% | 2927 fps | 98.8% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 47,921 psi | 75% | 2904 fps | 99.6% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 49,255 psi | 77% | 2831 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 41,321 psi | 65% | 2690 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 43,526 psi | 68% | 2756 fps | 95.5% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 49,240 psi | 77% | 2982 fps | 95.5% |
| Somchem S335 | <<locked>> | 80% | 49,008 psi | 77% | 2828 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 49,980 psi | 78% | 2920 fps | 99.7% |
| Somchem S355 | <<locked>> | 80% | 39,987 psi | 63% | 2753 fps | 98.7% |
| Somchem S365 | <<locked>> | 80% | 29,486 psi | 46% | 2579 fps | 96.9% |
| Somchem S385 | <<locked>> | 94% | 44,179 psi | 69% | 2851 fps | 95% |
| Vihtavuori N133 | <<locked>> | 80% | 49,661 psi | 78% | 2822 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 45,701 psi | 72% | 2812 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 46,238 psi | 72% | 2822 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 38,189 psi | 60% | 2687 fps | 99.3% |
| Vihtavuori N160 | <<locked>> | 80% | 34,200 psi | 54% | 2635 fps | 95.1% |
| Vihtavuori N530 | <<locked>> | 80% | 51,663 psi | 81% | 2940 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 44,715 psi | 70% | 2808 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 36,100 psi | 57% | 2690 fps | 95.6% |
| Vihtavuori N555 | <<locked>> | 88% | 33,301 psi | 52% | 2684 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,924 psi | 53% | 2608 fps | 97.5% |
| Winchester 748 | <<locked>> | 80% | 52,112 psi | 82% | 2989 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 42,975 psi | 67% | 2864 fps | 95.3% |
| Winchester StaBALL HD | <<locked>> | 90% | 28,906 psi | 45% | 2621 fps | 95.3% |
| Winchester StaBALL Match | <<locked>> | 80% | 47,703 psi | 75% | 2907 fps | 99.8% |
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 98 powders for .338 Rem. Ultra Mag. loaded with the .338 | 172gr | Sax KDG-S. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,173 fps; across all powders the maximum-charge window runs from 1,929 fps to 3,173 fps. Accurate 3100 gives the best case fill at 100 %, and 98 of the 98 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (440 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 172.0 gr projectile in 0.338" calls for a 1:14.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Reloder-19 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 Reloder-16, ReloadSwiss RS 70 rank at the top here: for .338 Rem. Ultra Mag. with the .338 | 172gr | Sax KDG-S 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.