Load Specifications
Load data in caliber .33 Nosler with .338 | 185gr | Barnes XLC BT bullet and 96 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Power Pro 2000-MR, Alliant Reloder-17 and ReloadSwiss RS 60.
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% | 55,434 psi | 85% | 2854 fps | 100% |
| Accurate 2495 | <<locked>> | 86% | 55,579 psi | 86% | 2894 fps | 100% |
| Accurate 2520 | <<locked>> | 82% | 55,941 psi | 86% | 2946 fps | 100% |
| Accurate 2700 | <<locked>> | 88% | 56,275 psi | 87% | 2920 fps | 96.7% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,397 psi | 70% | 2831 fps | 96.3% |
| Accurate 4064 | <<locked>> | 90% | 58,697 psi | 90% | 2989 fps | 100% |
| Accurate 4350 | <<locked>> | 98% | 58,030 psi | 89% | 3068 fps | 99.6% |
| ADI AR 2206H | <<locked>> | 86% | 57,595 psi | 89% | 3005 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 92% | 58,204 psi | 90% | 3002 fps | 99.8% |
| ADI Benchmark 8208 | <<locked>> | 84% | 56,318 psi | 87% | 2953 fps | 100% |
| Alliant AR-Comp | <<locked>> | 84% | 57,696 psi | 89% | 2933 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 88% | 56,956 psi | 88% | 3127 fps | 99.8% |
| Alliant Reloder- TS 15.5 | <<locked>> | 90% | 55,419 psi | 85% | 2979 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 88% | 55,956 psi | 86% | 2999 fps | 99.7% |
| Alliant Reloder-16ᴾ | <<locked>> | 100% | 58,015 psi | 89% | 3114 fps | 99.8% |
| Alliant Reloder-17 | <<locked>> | 94% | 56,043 psi | 86% | 3100 fps | 100% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,743 psi | 66% | 2854 fps | 99% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 47,674 psi | 73% | 3018 fps | 98.3% |
| Baschieri & Pellagri 107 | <<locked>> | 86% | 57,261 psi | 88% | 3018 fps | 99.6% |
| Bofors RP3 | <<locked>> | 90% | 56,652 psi | 87% | 3002 fps | 100% |
| Bofors RP7 | <<locked>> | 94% | 56,144 psi | 86% | 2959 fps | 96.9% |
| Hodgdon Benchmark | <<locked>> | 84% | 57,783 psi | 89% | 2933 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 84% | 56,246 psi | 87% | 2989 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 82% | 57,798 psi | 89% | 3084 fps | 99.9% |
| Hodgdon H380 | <<locked>> | 90% | 57,014 psi | 88% | 3005 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 96% | 56,347 psi | 87% | 3051 fps | 97.7% |
| Hodgdon H4350 | <<locked>> | 94% | 56,898 psi | 88% | 3012 fps | 96.4% |
| Hodgdon H4895 | <<locked>> | 86% | 58,146 psi | 89% | 3018 fps | 100% |
| Hodgdon Hybrid 100Vᴾ | <<locked>> | 100% | 54,636 psi | 84% | 2989 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 88% | 57,595 psi | 89% | 3051 fps | 100% |
| Hodgdon Superformance | <<locked>> | 96% | 56,942 psi | 88% | 3091 fps | 97.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,158 psi | 56% | 1837 fps | 100% |
| Hodgdon VARGET | <<locked>> | 86% | 55,593 psi | 86% | 2963 fps | 100% |
| IMR 3031 | <<locked>> | 86% | 58,262 psi | 90% | 2999 fps | 100% |
| IMR 4064 | <<locked>> | 90% | 57,943 psi | 89% | 2986 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 88% | 57,754 psi | 89% | 2963 fps | 97.7% |
| IMR 4350 | <<locked>> | 98% | 56,028 psi | 86% | 2982 fps | 97% |
| IMR 4451 Enduron | <<locked>> | 94% | 57,580 psi | 89% | 2989 fps | 97.7% |
| IMR 4831ᴾ | <<locked>> | 100% | 58,059 psi | 89% | 3054 fps | 99.7% |
| IMR 4895 | <<locked>> | 88% | 57,290 psi | 88% | 3031 fps | 100% |
| IMR 8208 XBR | <<locked>> | 84% | 56,318 psi | 87% | 2953 fps | 100% |
| Lovex D073.6 | <<locked>> | 86% | 58,117 psi | 89% | 2989 fps | 100% |
| Lovex S060 | <<locked>> | 86% | 56,753 psi | 87% | 2927 fps | 99.9% |
| Lovex S062 | <<locked>> | 90% | 58,421 psi | 90% | 2989 fps | 100% |
| Lovex S065 | <<locked>> | 96% | 57,522 psi | 88% | 2989 fps | 98.8% |
| Lovex S070 | <<locked>> | 98% | 58,552 psi | 90% | 3025 fps | 98.1% |
| Norma 201 | <<locked>> | 86% | 56,739 psi | 87% | 2953 fps | 100% |
| Norma 202 | <<locked>> | 86% | 57,014 psi | 88% | 2953 fps | 100% |
| Norma 203B | <<locked>> | 90% | 58,653 psi | 90% | 3041 fps | 100% |
| Norma URP | <<locked>> | 98% | 56,405 psi | 87% | 3048 fps | 99.5% |
| Ramshot Big Game | <<locked>> | 88% | 55,390 psi | 85% | 3009 fps | 99.8% |
| Ramshot Hunterᴾ | <<locked>> | 100% | 58,668 psi | 90% | 3097 fps | 98.7% |
| Ramshot TAC | <<locked>> | 84% | 56,536 psi | 87% | 2969 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 84% | 56,376 psi | 87% | 2992 fps | 99.9% |
| Ramshot X-Terminator | <<locked>> | 82% | 57,145 psi | 88% | 2953 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,738 psi | 57% | 1880 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 90% | 56,985 psi | 88% | 2982 fps | 98.2% |
| ReloadSwiss RS 52 | <<locked>> | 86% | 56,260 psi | 87% | 3064 fps | 99.7% |
| ReloadSwiss RS 60 | <<locked>> | 92% | 55,564 psi | 85% | 3100 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 98% | 57,145 psi | 88% | 3084 fps | 99.4% |
| ReloadSwiss RS 70 | <<locked>> | 98% | 56,434 psi | 87% | 3110 fps | 99.2% |
| Rottweil R 901 | <<locked>> | 84% | 58,189 psi | 90% | 2940 fps | 100% |
| Rottweil R 902 | <<locked>> | 88% | 57,377 psi | 88% | 2953 fps | 100% |
| Rottweil R 903 | <<locked>> | 92% | 56,434 psi | 87% | 2992 fps | 100% |
| Rottweil R 907 | <<locked>> | 94% | 56,144 psi | 86% | 2959 fps | 96.9% |
| Shooters World Long Rifle | <<locked>> | 96% | 57,522 psi | 88% | 2989 fps | 98.8% |
| Shooters World Match Rifle | <<locked>> | 86% | 58,117 psi | 89% | 2989 fps | 100% |
| Shooters World Precision | <<locked>> | 90% | 58,421 psi | 90% | 2989 fps | 100% |
| Shooters World SW4350 | <<locked>> | 98% | 58,552 psi | 90% | 3025 fps | 98.1% |
| SNPE Vectan SP 11 | <<locked>> | 92% | 57,319 psi | 88% | 3045 fps | 99.9% |
| SNPE Vectan SP 7 | <<locked>> | 84% | 55,579 psi | 86% | 2953 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 86% | 55,782 psi | 86% | 2972 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 86% | 57,653 psi | 89% | 2884 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 92% | 57,783 psi | 89% | 2881 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 96% | 57,754 psi | 89% | 2936 fps | 97.7% |
| Somchem S321 | <<locked>> | 82% | 57,943 psi | 89% | 2989 fps | 100% |
| Somchem S335 | <<locked>> | 86% | 57,246 psi | 88% | 2884 fps | 100% |
| Somchem S341 | <<locked>> | 86% | 58,479 psi | 90% | 2995 fps | 100% |
| Somchem S355 | <<locked>> | 92% | 56,420 psi | 87% | 2986 fps | 100% |
| Somchem S365ᴾ | <<locked>> | 100% | 54,462 psi | 84% | 3051 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,024 psi | 78% | 2927 fps | 95.9% |
| Vihtavuori N130 | <<locked>> | 82% | 57,305 psi | 88% | 2844 fps | 100% |
| Vihtavuori N133 | <<locked>> | 86% | 57,725 psi | 89% | 2867 fps | 100% |
| Vihtavuori N135 | <<locked>> | 88% | 56,913 psi | 88% | 2913 fps | 100% |
| Vihtavuori N140 | <<locked>> | 88% | 57,334 psi | 88% | 2927 fps | 100% |
| Vihtavuori N150 | <<locked>> | 94% | 57,580 psi | 89% | 2959 fps | 100% |
| Vihtavuori N160 | <<locked>> | 98% | 58,740 psi | 90% | 3041 fps | 99.6% |
| Vihtavuori N530 | <<locked>> | 84% | 57,043 psi | 88% | 2953 fps | 100% |
| Vihtavuori N540 | <<locked>> | 88% | 55,651 psi | 86% | 2923 fps | 100% |
| Vihtavuori N550 | <<locked>> | 98% | 57,986 psi | 89% | 3048 fps | 99.5% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,036 psi | 72% | 2936 fps | 98.9% |
| Winchester 6.5 StaBALL | <<locked>> | 96% | 55,158 psi | 85% | 2963 fps | 100% |
| Winchester 748 | <<locked>> | 84% | 56,855 psi | 87% | 3002 fps | 100% |
| Winchester 760 | <<locked>> | 96% | 56,550 psi | 87% | 3058 fps | 97.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,740 psi | 60% | 2867 fps | 99% |
| Winchester StaBALL Match | <<locked>> | 86% | 55,825 psi | 86% | 2982 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% | 52,315 psi | 80% | 2812 fps | 100% |
| Accurate 2495 | <<locked>> | 80% | 46,441 psi | 71% | 2753 fps | 100% |
| Accurate 2520 | <<locked>> | 80% | 52,402 psi | 81% | 2894 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 49,690 psi | 76% | 2808 fps | 95.3% |
| Accurate 3100 | <<locked>> | 98% | 42,525 psi | 65% | 2772 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 43,859 psi | 67% | 2749 fps | 100% |
| Accurate 4350 | <<locked>> | 84% | 36,869 psi | 57% | 2674 fps | 95.7% |
| ADI AR 2206H | <<locked>> | 80% | 48,167 psi | 74% | 2848 fps | 99.3% |
| ADI AR 2208 | <<locked>> | 80% | 41,002 psi | 63% | 2690 fps | 97.5% |
| ADI Benchmark 8208 | <<locked>> | 80% | 50,053 psi | 77% | 2851 fps | 99.9% |
| Alliant AR-Comp | <<locked>> | 80% | 50,821 psi | 78% | 2838 fps | 100% |
| Alliant Power Pro 2000-MR | 67.4 gr | 80% | 43,859 psi | 67% | 2881 fps | 98.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 41,133 psi | 63% | 2720 fps | 98.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 44,048 psi | 68% | 2785 fps | 98.3% |
| Alliant Reloder-16 | <<locked>> | 84% | 36,230 psi | 56% | 2674 fps | 95.5% |
| Alliant Reloder-17 | 66.4 gr | 80% | 35,810 psi | 55% | 2690 fps | 97.2% |
| Alliant Reloder-23 | <<locked>> | 90% | 31,966 psi | 49% | 2582 fps | 95.4% |
| Alliant Reloder-26 | <<locked>> | 94% | 39,146 psi | 60% | 2828 fps | 95.7% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,253 psi | 73% | 2848 fps | 98.4% |
| Bofors RP3 | <<locked>> | 80% | 41,423 psi | 64% | 2733 fps | 99% |
| Bofors RP7 | <<locked>> | 90% | 49,908 psi | 77% | 2854 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,532 psi | 79% | 2835 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 49,429 psi | 76% | 2881 fps | 100% |
| Hodgdon CFE223 | <<locked>> | 80% | 54,128 psi | 83% | 3028 fps | 99.6% |
| Hodgdon H380 | <<locked>> | 80% | 41,945 psi | 65% | 2730 fps | 96.6% |
| Hodgdon H414 | <<locked>> | 90% | 46,601 psi | 72% | 2881 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 92% | 53,563 psi | 82% | 2956 fps | 95.7% |
| Hodgdon H4895 | <<locked>> | 80% | 48,675 psi | 75% | 2861 fps | 99.6% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 31,749 psi | 49% | 2520 fps | 95.6% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,628 psi | 69% | 2831 fps | 99.4% |
| Hodgdon Superformance | <<locked>> | 92% | 49,777 psi | 77% | 2963 fps | 95.8% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,992 psi | 42% | 1640 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,441 psi | 71% | 2805 fps | 99.4% |
| IMR 3031 | <<locked>> | 80% | 48,399 psi | 74% | 2851 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 43,091 psi | 66% | 2726 fps | 98.2% |
| IMR 4166 Enduron | <<locked>> | 80% | 45,440 psi | 70% | 2743 fps | 95.1% |
| IMR 4350 | <<locked>> | 94% | 49,661 psi | 76% | 2871 fps | 95.6% |
| IMR 4451 Enduron | <<locked>> | 86% | 45,484 psi | 70% | 2772 fps | 95% |
| IMR 4831 | <<locked>> | 84% | 35,549 psi | 55% | 2625 fps | 95.3% |
| IMR 4895 | <<locked>> | 80% | 45,063 psi | 69% | 2815 fps | 98.9% |
| IMR 8208 XBR | <<locked>> | 80% | 50,053 psi | 77% | 2851 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 48,066 psi | 74% | 2835 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,761 psi | 73% | 2776 fps | 99.3% |
| Lovex S062 | <<locked>> | 80% | 43,613 psi | 67% | 2736 fps | 99.4% |
| Lovex S065 | <<locked>> | 84% | 40,698 psi | 63% | 2677 fps | 95.3% |
| Lovex S070 | <<locked>> | 90% | 46,180 psi | 71% | 2808 fps | 95.6% |
| Norma 201 | <<locked>> | 80% | 47,659 psi | 73% | 2802 fps | 99.8% |
| Norma 202 | <<locked>> | 80% | 47,572 psi | 73% | 2805 fps | 100% |
| Norma 203B | <<locked>> | 80% | 43,453 psi | 67% | 2772 fps | 98.6% |
| Norma URP | <<locked>> | 84% | 36,608 psi | 56% | 2664 fps | 95.4% |
| Ramshot Big Game | <<locked>> | 80% | 42,772 psi | 66% | 2782 fps | 98.4% |
| Ramshot Hunter | <<locked>> | 90% | 42,888 psi | 66% | 2812 fps | 95.5% |
| Ramshot TAC | <<locked>> | 80% | 49,908 psi | 77% | 2854 fps | 97.8% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,647 psi | 76% | 2881 fps | 99.4% |
| Ramshot X-Terminator | <<locked>> | 80% | 53,621 psi | 82% | 2897 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,441 psi | 42% | 1680 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 82% | 44,657 psi | 69% | 2762 fps | 95.6% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 46,180 psi | 71% | 2890 fps | 98.6% |
| ReloadSwiss RS 60 | 66.4 gr | 80% | 37,898 psi | 58% | 2756 fps | 99.6% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 36,274 psi | 56% | 2684 fps | 95% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 40,785 psi | 63% | 2799 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 51,938 psi | 80% | 2844 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 45,542 psi | 70% | 2756 fps | 99.6% |
| Rottweil R 903 | <<locked>> | 80% | 39,146 psi | 60% | 2677 fps | 98.3% |
| Rottweil R 907 | <<locked>> | 90% | 49,908 psi | 77% | 2854 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 40,698 psi | 63% | 2677 fps | 95.3% |
| Shooters World Match Rifle | <<locked>> | 80% | 48,066 psi | 74% | 2835 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 43,613 psi | 67% | 2736 fps | 99.4% |
| Shooters World SW4350 | <<locked>> | 90% | 46,180 psi | 71% | 2808 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 39,349 psi | 61% | 2717 fps | 97.6% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,834 psi | 75% | 2838 fps | 98% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,441 psi | 71% | 2812 fps | 99% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 48,283 psi | 74% | 2743 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 40,582 psi | 62% | 2608 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 88% | 45,266 psi | 70% | 2723 fps | 95.1% |
| Somchem S321 | <<locked>> | 80% | 54,360 psi | 84% | 2936 fps | 100% |
| Somchem S335 | <<locked>> | 80% | 48,254 psi | 74% | 2746 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 48,196 psi | 74% | 2831 fps | 99.2% |
| Somchem S355 | <<locked>> | 80% | 39,581 psi | 61% | 2677 fps | 98.2% |
| Somchem S365 | <<locked>> | 80% | 29,443 psi | 45% | 2513 fps | 96.2% |
| Somchem S385 | <<locked>> | 98% | 47,950 psi | 74% | 2874 fps | 95.1% |
| Vihtavuori N130 | <<locked>> | 80% | 54,056 psi | 83% | 2802 fps | 100% |
| Vihtavuori N133 | <<locked>> | 80% | 48,530 psi | 75% | 2733 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,846 psi | 69% | 2730 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 45,194 psi | 70% | 2736 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 37,724 psi | 58% | 2608 fps | 98.9% |
| Vihtavuori N160 | <<locked>> | 82% | 35,882 psi | 55% | 2612 fps | 95% |
| Vihtavuori N530 | <<locked>> | 80% | 50,343 psi | 77% | 2851 fps | 99.9% |
| Vihtavuori N540 | <<locked>> | 80% | 43,787 psi | 67% | 2730 fps | 100% |
| Vihtavuori N550 | <<locked>> | 84% | 37,724 psi | 58% | 2671 fps | 95.5% |
| Vihtavuori N555 | <<locked>> | 90% | 34,693 psi | 53% | 2667 fps | 95.7% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 33,373 psi | 51% | 2530 fps | 96.5% |
| Winchester 748 | <<locked>> | 80% | 50,067 psi | 77% | 2897 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 46,789 psi | 72% | 2884 fps | 95.6% |
| Winchester StaBALL HD | <<locked>> | 94% | 32,372 psi | 50% | 2674 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 46,151 psi | 71% | 2818 fps | 99.4% |
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 96 powders for .33 Nosler loaded with the .338 | 185gr | Barnes XLC BT. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,127 fps; across all powders the maximum-charge window runs from 1,837 fps to 3,127 fps. Accurate 3100 gives the best case fill at 100 %, and 96 of the 96 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (448 MPa), the top charges use 56–90 %, leaving at least 10 % headroom. The 185.0 gr projectile in 0.338" calls for a 1:15.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, Alliant Reloder-16, 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 Power Pro 2000-MR, Alliant Reloder-17, ReloadSwiss RS 60 rank at the top here: for .33 Nosler with the .338 | 185gr | Barnes XLC BT 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.