Load Specifications
Load data in caliber .243 Win. with .243 | 90gr | TWENTY-NINE ERTP 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 Reloder-16, ReloadSwiss RS 70 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 2495 | <<locked>> | 86% | 54,288 psi | 90% | 2920 fps | 100% |
| Accurate 2700 | <<locked>> | 86% | 52,808 psi | 88% | 2907 fps | 96.8% |
| Accurate 3100ᴾ | <<locked>> | 100% | 45,426 psi | 75% | 2864 fps | 97.1% |
| Accurate 4064 | <<locked>> | 88% | 54,273 psi | 90% | 2966 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 51,097 psi | 85% | 2995 fps | 99.4% |
| ADI AR 2206H | <<locked>> | 84% | 54,056 psi | 90% | 2995 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 88% | 51,851 psi | 86% | 2943 fps | 99.6% |
| ADI AR 2209ᴾ | <<locked>> | 100% | 52,692 psi | 88% | 3018 fps | 95.9% |
| ADI Benchmark 8208 | <<locked>> | 82% | 53,171 psi | 88% | 2949 fps | 100% |
| Alliant AR-Comp | <<locked>> | 82% | 54,041 psi | 90% | 2923 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 86% | 53,983 psi | 90% | 3114 fps | 99.9% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 52,721 psi | 88% | 3018 fps | 96.1% |
| Alliant Power Pro Varmintᴾ | <<locked>> | 100% | 52,721 psi | 88% | 3018 fps | 96.1% |
| Alliant Reloder- TS 15.5 | <<locked>> | 88% | 52,083 psi | 87% | 2966 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 86% | 52,634 psi | 87% | 2989 fps | 99.7% |
| Alliant Reloder-16 | <<locked>> | 96% | 51,953 psi | 86% | 3051 fps | 99.7% |
| Alliant Reloder-17 | <<locked>> | 92% | 53,461 psi | 89% | 3091 fps | 100% |
| Alliant Reloder-19ᴾ | <<locked>> | 100% | 51,938 psi | 86% | 3009 fps | 95.9% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 42,714 psi | 71% | 2890 fps | 99.5% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 48,573 psi | 81% | 3068 fps | 99.2% |
| Baschieri & Pellagri 107 | <<locked>> | 84% | 54,114 psi | 90% | 3009 fps | 99.7% |
| Bofors RP3 | <<locked>> | 88% | 52,939 psi | 88% | 2982 fps | 100% |
| Bofors RP7 | <<locked>> | 92% | 52,997 psi | 88% | 2953 fps | 97.1% |
| Hodgdon Benchmark | <<locked>> | 82% | 54,447 psi | 90% | 2930 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 82% | 52,736 psi | 88% | 2972 fps | 100% |
| Hodgdon H380 | <<locked>> | 88% | 53,664 psi | 89% | 2992 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 94% | 53,577 psi | 89% | 3041 fps | 97.9% |
| Hodgdon H4350 | <<locked>> | 92% | 53,896 psi | 90% | 3002 fps | 96.6% |
| Hodgdon H4895 | <<locked>> | 82% | 51,488 psi | 86% | 2959 fps | 99.9% |
| Hodgdon Hybrid 100V | <<locked>> | 98% | 52,011 psi | 86% | 2976 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 50,763 psi | 84% | 2979 fps | 100% |
| Hodgdon Superformance | <<locked>> | 94% | 54,244 psi | 90% | 3074 fps | 97.7% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 35,462 psi | 59% | 1896 fps | 100% |
| Hodgdon VARGET | <<locked>> | 84% | 52,460 psi | 87% | 2956 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 51,111 psi | 85% | 2940 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 51,445 psi | 85% | 2930 fps | 99.7% |
| IMR 4166 Enduron | <<locked>> | 84% | 51,184 psi | 85% | 2900 fps | 97.2% |
| IMR 4350 | <<locked>> | 96% | 53,345 psi | 89% | 2972 fps | 97.2% |
| IMR 4451 Enduron | <<locked>> | 90% | 51,488 psi | 86% | 2930 fps | 97.2% |
| IMR 4831 | <<locked>> | 96% | 51,822 psi | 86% | 2989 fps | 99.5% |
| IMR 4895 | <<locked>> | 86% | 53,954 psi | 90% | 3022 fps | 100% |
| IMR 8208 XBR | <<locked>> | 82% | 53,171 psi | 88% | 2949 fps | 100% |
| Lovex D073.6 | <<locked>> | 84% | 54,041 psi | 90% | 2969 fps | 100% |
| Lovex S060 | <<locked>> | 84% | 53,345 psi | 89% | 2923 fps | 99.9% |
| Lovex S062 | <<locked>> | 86% | 51,517 psi | 86% | 2927 fps | 100% |
| Lovex S065 | <<locked>> | 94% | 54,389 psi | 90% | 2979 fps | 98.9% |
| Lovex S070 | <<locked>> | 94% | 51,895 psi | 86% | 2956 fps | 97.7% |
| Norma 201 | <<locked>> | 84% | 52,808 psi | 88% | 2943 fps | 100% |
| Norma 202 | <<locked>> | 84% | 53,388 psi | 89% | 2943 fps | 100% |
| Norma 203B | <<locked>> | 86% | 51,880 psi | 86% | 2976 fps | 99.9% |
| Norma 204 | <<locked>> | 96% | 54,056 psi | 90% | 3022 fps | 96.1% |
| Norma MRPᴾ | <<locked>> | 100% | 48,327 psi | 80% | 3022 fps | 96.8% |
| Norma URP | <<locked>> | 96% | 53,664 psi | 89% | 3038 fps | 99.6% |
| Ramshot Big Game | <<locked>> | 86% | 52,301 psi | 87% | 2992 fps | 99.9% |
| Ramshot Hunter | <<locked>> | 96% | 52,504 psi | 87% | 3028 fps | 98.5% |
| Ramshot TAC | <<locked>> | 82% | 53,113 psi | 88% | 2956 fps | 98.8% |
| Ramshot Wild Boar | <<locked>> | 82% | 53,069 psi | 88% | 2979 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,042 psi | 60% | 1942 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 88% | 53,824 psi | 89% | 2972 fps | 98.3% |
| ReloadSwiss RS 52 | <<locked>> | 84% | 52,953 psi | 88% | 3054 fps | 99.8% |
| ReloadSwiss RS 60 | <<locked>> | 90% | 52,736 psi | 88% | 3084 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 96% | 54,433 psi | 90% | 3068 fps | 99.6% |
| ReloadSwiss RS 70 | <<locked>> | 96% | 53,969 psi | 90% | 3100 fps | 99.5% |
| Rottweil R 901 | <<locked>> | 82% | 53,867 psi | 89% | 2930 fps | 100% |
| Rottweil R 902 | <<locked>> | 86% | 53,330 psi | 89% | 2940 fps | 100% |
| Rottweil R 903 | <<locked>> | 90% | 52,779 psi | 88% | 2972 fps | 100% |
| Rottweil R 907 | <<locked>> | 92% | 52,997 psi | 88% | 2953 fps | 97.1% |
| Shooters World Long Rifle | <<locked>> | 94% | 54,389 psi | 90% | 2979 fps | 98.9% |
| Shooters World Match Rifle | <<locked>> | 84% | 54,041 psi | 90% | 2969 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 51,517 psi | 86% | 2927 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 51,895 psi | 86% | 2956 fps | 97.7% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 50,952 psi | 85% | 2979 fps | 99.8% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 51,619 psi | 86% | 2930 fps | 99% |
| SNPE Vectan SP 9 | <<locked>> | 84% | 52,605 psi | 87% | 2963 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 84% | 53,940 psi | 90% | 2881 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 51,459 psi | 85% | 2835 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 51,010 psi | 85% | 2871 fps | 97.3% |
| Somchem S335 | <<locked>> | 84% | 53,592 psi | 89% | 2877 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 51,648 psi | 86% | 2930 fps | 99.8% |
| Somchem S355 | <<locked>> | 90% | 53,113 psi | 88% | 2972 fps | 100% |
| Somchem S365 | <<locked>> | 98% | 52,025 psi | 86% | 3038 fps | 100% |
| Somchem S385ᴾ | <<locked>> | 100% | 51,300 psi | 85% | 2966 fps | 96.9% |
| Vihtavuori N133 | <<locked>> | 84% | 54,259 psi | 90% | 2864 fps | 100% |
| Vihtavuori N135 | <<locked>> | 86% | 53,519 psi | 89% | 2910 fps | 100% |
| Vihtavuori N140 | <<locked>> | 86% | 54,172 psi | 90% | 2920 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 51,010 psi | 85% | 2900 fps | 100% |
| Vihtavuori N160 | <<locked>> | 94% | 52,533 psi | 87% | 2979 fps | 99.4% |
| Vihtavuori N530 | <<locked>> | 82% | 53,229 psi | 88% | 2943 fps | 100% |
| Vihtavuori N540 | <<locked>> | 86% | 52,431 psi | 87% | 2913 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 51,851 psi | 86% | 2986 fps | 99.3% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 47,427 psi | 79% | 2969 fps | 99.4% |
| Winchester 6.5 StaBALL | <<locked>> | 94% | 52,692 psi | 88% | 2949 fps | 100% |
| Winchester 748 | <<locked>> | 82% | 53,563 psi | 89% | 2989 fps | 100% |
| Winchester 760 | <<locked>> | 94% | 53,983 psi | 90% | 3048 fps | 98% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 38,566 psi | 64% | 2910 fps | 99.7% |
| Winchester StaBALL Match | <<locked>> | 84% | 52,576 psi | 87% | 2969 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 2495 | <<locked>> | 80% | 44,338 psi | 74% | 2772 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 46,296 psi | 77% | 2795 fps | 95.2% |
| Accurate 3100 | <<locked>> | 96% | 39,233 psi | 65% | 2743 fps | 95.4% |
| Accurate 4064 | <<locked>> | 80% | 41,872 psi | 70% | 2769 fps | 100% |
| Accurate 4350 | <<locked>> | 82% | 33,475 psi | 56% | 2641 fps | 95.1% |
| ADI AR 2206H | <<locked>> | 80% | 47,718 psi | 79% | 2890 fps | 99.5% |
| ADI AR 2208 | <<locked>> | 80% | 40,553 psi | 67% | 2733 fps | 97.9% |
| ADI AR 2209 | <<locked>> | 98% | 49,574 psi | 82% | 2963 fps | 95.1% |
| ADI Benchmark 8208 | <<locked>> | 80% | 49,763 psi | 83% | 2894 fps | 100% |
| Alliant AR-Comp | <<locked>> | 80% | 50,299 psi | 84% | 2874 fps | 100% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 43,584 psi | 72% | 2920 fps | 98.6% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 49,255 psi | 82% | 2959 fps | 95.2% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 49,255 psi | 82% | 2959 fps | 95.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 40,321 psi | 67% | 2756 fps | 99.1% |
| Alliant Reloder-15 | <<locked>> | 80% | 43,308 psi | 72% | 2825 fps | 98.6% |
| Alliant Reloder-16 | 34.7 gr | 82% | 33,301 psi | 55% | 2651 fps | 95% |
| Alliant Reloder-17 | <<locked>> | 80% | 35,099 psi | 58% | 2723 fps | 97.7% |
| Alliant Reloder-19 | <<locked>> | 98% | 48,559 psi | 81% | 2949 fps | 95.1% |
| Alliant Reloder-23 | <<locked>> | 90% | 31,140 psi | 52% | 2608 fps | 96% |
| Alliant Reloder-26 | <<locked>> | 92% | 36,376 psi | 60% | 2799 fps | 95.8% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 47,094 psi | 78% | 2890 fps | 98.9% |
| Bofors RP3 | <<locked>> | 80% | 40,379 psi | 67% | 2762 fps | 99.2% |
| Bofors RP7 | <<locked>> | 88% | 46,746 psi | 78% | 2841 fps | 95.6% |
| Hodgdon Benchmark | <<locked>> | 80% | 51,401 psi | 85% | 2884 fps | 100% |
| Hodgdon BL-C2 | <<locked>> | 80% | 48,936 psi | 81% | 2913 fps | 100% |
| Hodgdon H380 | <<locked>> | 80% | 40,828 psi | 68% | 2759 fps | 97% |
| Hodgdon H414 | <<locked>> | 88% | 43,976 psi | 73% | 2871 fps | 95.7% |
| Hodgdon H4350 | <<locked>> | 88% | 47,500 psi | 79% | 2890 fps | 95% |
| Hodgdon H4895 | <<locked>> | 80% | 48,167 psi | 80% | 2900 fps | 99.8% |
| Hodgdon Hybrid 100V | <<locked>> | 82% | 30,705 psi | 51% | 2546 fps | 95.9% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 44,266 psi | 74% | 2867 fps | 99.7% |
| Hodgdon Superformance | <<locked>> | 88% | 43,569 psi | 72% | 2877 fps | 95% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,455 psi | 44% | 1703 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 46,195 psi | 77% | 2851 fps | 99.6% |
| IMR 3031 | <<locked>> | 80% | 47,979 psi | 80% | 2894 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 42,598 psi | 71% | 2769 fps | 98.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 44,875 psi | 75% | 2785 fps | 95.7% |
| IMR 4350 | <<locked>> | 92% | 47,094 psi | 78% | 2864 fps | 95.8% |
| IMR 4451 Enduron | <<locked>> | 86% | 45,165 psi | 75% | 2815 fps | 95.7% |
| IMR 4831 | <<locked>> | 84% | 34,650 psi | 58% | 2651 fps | 95.7% |
| IMR 4895 | <<locked>> | 80% | 44,411 psi | 74% | 2858 fps | 99.2% |
| IMR 8208 XBR | <<locked>> | 80% | 49,763 psi | 83% | 2894 fps | 100% |
| Lovex D073.6 | <<locked>> | 80% | 47,079 psi | 78% | 2861 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 47,123 psi | 78% | 2818 fps | 99.5% |
| Lovex S062 | <<locked>> | 80% | 42,380 psi | 70% | 2769 fps | 99.6% |
| Lovex S065 | <<locked>> | 84% | 39,639 psi | 66% | 2707 fps | 95.7% |
| Lovex S070 | <<locked>> | 88% | 42,830 psi | 71% | 2789 fps | 95.5% |
| Norma 201 | <<locked>> | 80% | 46,514 psi | 77% | 2838 fps | 99.9% |
| Norma 202 | <<locked>> | 80% | 46,978 psi | 78% | 2844 fps | 100% |
| Norma 203B | <<locked>> | 80% | 42,699 psi | 71% | 2812 fps | 98.9% |
| Norma 204 | <<locked>> | 94% | 50,430 psi | 84% | 2959 fps | 95.2% |
| Norma MRP | <<locked>> | 98% | 45,107 psi | 75% | 2959 fps | 95.9% |
| Norma URP | <<locked>> | 82% | 33,692 psi | 56% | 2644 fps | 95% |
| Ramshot Big Game | <<locked>> | 80% | 42,351 psi | 70% | 2818 fps | 98.8% |
| Ramshot Hunter | <<locked>> | 88% | 40,103 psi | 67% | 2795 fps | 95.4% |
| Ramshot TAC | <<locked>> | 80% | 49,821 psi | 83% | 2900 fps | 98.3% |
| Ramshot Wild Boar | <<locked>> | 80% | 49,690 psi | 83% | 2923 fps | 99.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 26,760 psi | 44% | 1742 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 41,321 psi | 69% | 2743 fps | 95.4% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 45,963 psi | 76% | 2933 fps | 99% |
| ReloadSwiss RS 60 | 36.5 gr | 80% | 37,347 psi | 62% | 2795 fps | 99.8% |
| ReloadSwiss RS 62 | <<locked>> | 84% | 35,708 psi | 59% | 2713 fps | 95.6% |
| ReloadSwiss RS 70 | 39.8 gr | 86% | 37,884 psi | 63% | 2776 fps | 95.7% |
| Rottweil R 901 | <<locked>> | 80% | 50,430 psi | 84% | 2877 fps | 100% |
| Rottweil R 902 | <<locked>> | 80% | 44,251 psi | 74% | 2789 fps | 99.7% |
| Rottweil R 903 | <<locked>> | 80% | 37,811 psi | 63% | 2703 fps | 98.5% |
| Rottweil R 907 | <<locked>> | 88% | 46,746 psi | 78% | 2841 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 84% | 39,639 psi | 66% | 2707 fps | 95.7% |
| Shooters World Match Rifle | <<locked>> | 80% | 47,079 psi | 78% | 2861 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 42,380 psi | 70% | 2769 fps | 99.6% |
| Shooters World SW4350 | <<locked>> | 88% | 42,830 psi | 71% | 2789 fps | 95.5% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 38,827 psi | 65% | 2753 fps | 98.1% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 48,240 psi | 80% | 2874 fps | 98.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 46,122 psi | 77% | 2851 fps | 99.4% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 47,761 psi | 79% | 2789 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 39,943 psi | 66% | 2648 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 41,916 psi | 70% | 2707 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 47,369 psi | 79% | 2782 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 47,964 psi | 80% | 2867 fps | 99.5% |
| Somchem S355 | <<locked>> | 80% | 38,435 psi | 64% | 2707 fps | 98.4% |
| Somchem S365 | <<locked>> | 80% | 28,181 psi | 47% | 2530 fps | 96.3% |
| Somchem S385 | <<locked>> | 96% | 45,049 psi | 75% | 2854 fps | 95.3% |
| Vihtavuori N133 | <<locked>> | 80% | 48,124 psi | 80% | 2776 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 44,034 psi | 73% | 2769 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 44,541 psi | 74% | 2776 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 36,709 psi | 61% | 2638 fps | 99.1% |
| Vihtavuori N160 | <<locked>> | 82% | 35,157 psi | 58% | 2648 fps | 95.5% |
| Vihtavuori N530 | <<locked>> | 80% | 50,096 psi | 83% | 2894 fps | 100% |
| Vihtavuori N540 | <<locked>> | 80% | 42,946 psi | 71% | 2759 fps | 100% |
| Vihtavuori N550 | <<locked>> | 82% | 34,534 psi | 57% | 2641 fps | 95.1% |
| Vihtavuori N555 | <<locked>> | 88% | 31,604 psi | 53% | 2631 fps | 95.1% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 32,503 psi | 54% | 2556 fps | 97% |
| Winchester 748 | <<locked>> | 80% | 50,053 psi | 83% | 2936 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 43,976 psi | 73% | 2871 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 92% | 29,515 psi | 49% | 2631 fps | 95.8% |
| Winchester StaBALL Match | <<locked>> | 80% | 45,992 psi | 76% | 2861 fps | 99.7% |
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 .243 Win. loaded with the .243 | 90gr | TWENTY-NINE ERTP. Alliant Power Pro 2000-MR delivers the highest muzzle velocity at 3,114 fps; across all powders the maximum-charge window runs from 1,896 fps to 3,114 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 (415 MPa), the top charges use 59–90 %, leaving at least 10 % headroom. The 90.0 gr projectile in 0.243" calls for a 1:7.5 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2209, Alliant Power Pro Varmint 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-16, ReloadSwiss RS 70, ReloadSwiss RS 60 rank at the top here: for .243 Win. with the .243 | 90gr | TWENTY-NINE ERTP 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.