Load Specifications
Load data in caliber .244 Rem. with .243 | 100gr | Hornady InterLock RN bullet and 95 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-17, ReloadSwiss RS 60 and Alliant Reloder-16.
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 2495 | <<locked>> | 84% | 55,434 psi | 89% | 2907 fps | 100% |
| Accurate 2700 | <<locked>> | 84% | 53,243 psi | 85% | 2910 fps | 97.6% |
| Accurate 3100ᴾ | <<locked>> | 100% | 50,328 psi | 81% | 2943 fps | 98.6% |
| Accurate 4064 | <<locked>> | 86% | 55,637 psi | 89% | 2963 fps | 100% |
| Accurate 4350 | <<locked>> | 94% | 56,318 psi | 90% | 3064 fps | 99.9% |
| Accurate High Countryᴾ | <<locked>> | 100% | 54,926 psi | 88% | 3143 fps | 96.4% |
| ADI AR 2206H | <<locked>> | 82% | 54,839 psi | 88% | 2989 fps | 100% |
| ADI AR 2208 | <<locked>> | 88% | 56,043 psi | 90% | 2992 fps | 100% |
| ADI AR 2209 | <<locked>> | 98% | 53,751 psi | 86% | 3038 fps | 96.9% |
| Alliant Power Pro 2000-MR | <<locked>> | 84% | 55,187 psi | 88% | 3120 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 98% | 53,534 psi | 86% | 3035 fps | 97% |
| Alliant Reloder- TS 15.5 | <<locked>> | 86% | 53,156 psi | 85% | 2963 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 84% | 53,330 psi | 86% | 2982 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 94% | 53,214 psi | 85% | 3061 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 90% | 54,636 psi | 88% | 3094 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 98% | 52,779 psi | 85% | 3025 fps | 96.9% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 50,082 psi | 80% | 3022 fps | 96.5% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 47,239 psi | 76% | 2966 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 41,176 psi | 66% | 2864 fps | 97.4% |
| Alliant Reloder-26ᴾ | <<locked>> | 100% | 54,230 psi | 87% | 3166 fps | 99.9% |
| Baschieri & Pellagri 107 | <<locked>> | 82% | 54,766 psi | 88% | 3002 fps | 99.9% |
| Bofors RP3 | <<locked>> | 86% | 53,940 psi | 86% | 2979 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 50,082 psi | 80% | 3022 fps | 96.5% |
| Bofors RP7 | <<locked>> | 90% | 53,403 psi | 86% | 2949 fps | 97.9% |
| Hodgdon H380 | <<locked>> | 86% | 54,317 psi | 87% | 2992 fps | 99.7% |
| Hodgdon H414 | <<locked>> | 92% | 55,013 psi | 88% | 3058 fps | 98.7% |
| Hodgdon H4350 | <<locked>> | 90% | 54,984 psi | 88% | 3015 fps | 97.6% |
| Hodgdon H4895 | <<locked>> | 82% | 55,419 psi | 89% | 2995 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 96% | 53,722 psi | 86% | 2989 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 84% | 55,680 psi | 89% | 3038 fps | 100% |
| Hodgdon Superformance | <<locked>> | 92% | 55,100 psi | 88% | 3091 fps | 98.5% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,260 psi | 58% | 1873 fps | 100% |
| Hodgdon VARGET | <<locked>> | 82% | 53,113 psi | 85% | 2946 fps | 100% |
| IMR 3031 | <<locked>> | 82% | 55,883 psi | 90% | 2976 fps | 100% |
| IMR 4064 | <<locked>> | 86% | 55,521 psi | 89% | 2976 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 84% | 54,810 psi | 88% | 2953 fps | 98.5% |
| IMR 4350 | <<locked>> | 94% | 54,128 psi | 87% | 2982 fps | 98% |
| IMR 4451 Enduron | <<locked>> | 90% | 55,172 psi | 88% | 2986 fps | 98.5% |
| IMR 4831 | <<locked>> | 94% | 53,040 psi | 85% | 2995 fps | 99.8% |
| IMR 4895 | <<locked>> | 84% | 54,737 psi | 88% | 3012 fps | 100% |
| Lovex D073.6 | <<locked>> | 82% | 55,274 psi | 89% | 2963 fps | 100% |
| Lovex S060 | <<locked>> | 82% | 53,969 psi | 87% | 2910 fps | 100% |
| Lovex S062 | <<locked>> | 86% | 55,680 psi | 89% | 2969 fps | 100% |
| Lovex S065 | <<locked>> | 92% | 55,056 psi | 88% | 2982 fps | 99.4% |
| Lovex S070 | <<locked>> | 94% | 56,318 psi | 90% | 3022 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 41,481 psi | 67% | 2779 fps | 96.8% |
| Norma 201 | <<locked>> | 82% | 53,693 psi | 86% | 2933 fps | 100% |
| Norma 202 | <<locked>> | 82% | 54,302 psi | 87% | 2930 fps | 100% |
| Norma 203B | <<locked>> | 86% | 56,347 psi | 90% | 3028 fps | 100% |
| Norma 204 | <<locked>> | 94% | 54,969 psi | 88% | 3038 fps | 97.1% |
| Norma MRPᴾ | <<locked>> | 100% | 53,069 psi | 85% | 3110 fps | 98.4% |
| Norma URP | <<locked>> | 94% | 54,882 psi | 88% | 3045 fps | 99.9% |
| Ramshot Big Game | <<locked>> | 84% | 53,432 psi | 86% | 2995 fps | 100% |
| Ramshot Hunter | <<locked>> | 94% | 53,664 psi | 86% | 3041 fps | 99.1% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,869 psi | 59% | 1919 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 86% | 54,534 psi | 87% | 2976 fps | 98.9% |
| ReloadSwiss RS 52 | <<locked>> | 82% | 54,012 psi | 87% | 3048 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 88% | 54,128 psi | 87% | 3087 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 94% | 56,130 psi | 90% | 3087 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 94% | 54,636 psi | 88% | 3110 fps | 99.8% |
| Rottweil R 902 | <<locked>> | 84% | 54,157 psi | 87% | 2930 fps | 100% |
| Rottweil R 903 | <<locked>> | 88% | 53,766 psi | 86% | 2972 fps | 100% |
| Rottweil R 904 | <<locked>> | 98% | 55,550 psi | 89% | 3012 fps | 96.1% |
| Rottweil R 905ᴾ | <<locked>> | 100% | 55,535 psi | 89% | 3071 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 90% | 53,403 psi | 86% | 2949 fps | 97.9% |
| Shooters World Long Rifle | <<locked>> | 92% | 55,056 psi | 88% | 2982 fps | 99.4% |
| Shooters World Match Rifle | <<locked>> | 82% | 55,274 psi | 89% | 2963 fps | 100% |
| Shooters World Precision | <<locked>> | 86% | 55,680 psi | 89% | 2969 fps | 100% |
| Shooters World SW4350 | <<locked>> | 94% | 56,318 psi | 90% | 3022 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 88% | 55,463 psi | 89% | 3035 fps | 100% |
| SNPE Vectan SP 7 | <<locked>> | 82% | 56,188 psi | 90% | 2992 fps | 99.8% |
| SNPE Vectan SP 9 | <<locked>> | 82% | 53,156 psi | 85% | 2953 fps | 100% |
| SNPE Vectan Tubal 3000 | <<locked>> | 82% | 54,418 psi | 87% | 2861 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 88% | 55,448 psi | 89% | 2867 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 92% | 54,824 psi | 88% | 2930 fps | 98.5% |
| SNPE Vectan Tubal 8000ᴾ | <<locked>> | 100% | 55,042 psi | 88% | 3064 fps | 97.5% |
| Somchem S335 | <<locked>> | 82% | 54,346 psi | 87% | 2864 fps | 100% |
| Somchem S341 | <<locked>> | 82% | 55,724 psi | 89% | 2976 fps | 100% |
| Somchem S355 | <<locked>> | 88% | 53,998 psi | 87% | 2969 fps | 100% |
| Somchem S365 | <<locked>> | 96% | 53,954 psi | 87% | 3051 fps | 100% |
| Somchem S385 | <<locked>> | 98% | 52,649 psi | 84% | 2986 fps | 97.8% |
| Vihtavuori N133 | <<locked>> | 82% | 54,911 psi | 88% | 2844 fps | 100% |
| Vihtavuori N135 | <<locked>> | 84% | 54,389 psi | 87% | 2890 fps | 100% |
| Vihtavuori N140 | <<locked>> | 84% | 54,810 psi | 88% | 2907 fps | 100% |
| Vihtavuori N150 | <<locked>> | 90% | 55,477 psi | 89% | 2946 fps | 100% |
| Vihtavuori N160 | <<locked>> | 92% | 53,795 psi | 86% | 2989 fps | 99.8% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 48,704 psi | 78% | 2904 fps | 96.6% |
| Vihtavuori N540 | <<locked>> | 86% | 56,434 psi | 90% | 2949 fps | 100% |
| Vihtavuori N550 | <<locked>> | 94% | 56,159 psi | 90% | 3045 fps | 99.9% |
| Vihtavuori N555ᴾ | <<locked>> | 100% | 52,852 psi | 85% | 3048 fps | 100% |
| Winchester 6.5 StaBALL | <<locked>> | 92% | 53,301 psi | 85% | 2956 fps | 100% |
| Winchester 760 | <<locked>> | 92% | 55,013 psi | 88% | 3058 fps | 98.7% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 42,554 psi | 68% | 3005 fps | 100% |
| Winchester StaBALL Match | <<locked>> | 82% | 53,461 psi | 86% | 2966 fps | 100% |
| Winchester Supreme 780ᴾ | <<locked>> | 100% | 52,794 psi | 85% | 2976 fps | 96.7% |
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% | 48,733 psi | 78% | 2808 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 46,804 psi | 75% | 2795 fps | 96.3% |
| Accurate 3100 | <<locked>> | 92% | 38,276 psi | 61% | 2710 fps | 95.8% |
| Accurate 4064 | <<locked>> | 80% | 46,137 psi | 74% | 2812 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 34,722 psi | 56% | 2644 fps | 96.4% |
| Accurate High Country | <<locked>> | 98% | 51,024 psi | 82% | 3074 fps | 95.5% |
| ADI AR 2206H | <<locked>> | 80% | 51,605 psi | 83% | 2936 fps | 100% |
| ADI AR 2208 | <<locked>> | 80% | 43,772 psi | 70% | 2776 fps | 99.1% |
| ADI AR 2209 | <<locked>> | 94% | 47,007 psi | 75% | 2913 fps | 95.3% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 47,834 psi | 77% | 2989 fps | 99.7% |
| Alliant Power Pro Varmint | <<locked>> | 94% | 47,195 psi | 76% | 2917 fps | 95.5% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 44,106 psi | 71% | 2802 fps | 99.8% |
| Alliant Reloder-15 | <<locked>> | 80% | 47,123 psi | 76% | 2874 fps | 99.6% |
| Alliant Reloder-16 | 36.2 gr | 80% | 34,156 psi | 55% | 2654 fps | 96.4% |
| Alliant Reloder-17 | 39 gr | 80% | 38,522 psi | 62% | 2789 fps | 99.2% |
| Alliant Reloder-19 | <<locked>> | 94% | 46,601 psi | 75% | 2907 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 98% | 46,673 psi | 75% | 2956 fps | 95.5% |
| Alliant Reloder-23 | <<locked>> | 84% | 28,326 psi | 45% | 2507 fps | 95.4% |
| Alliant Reloder-25 | <<locked>> | 96% | 36,419 psi | 58% | 2743 fps | 95.6% |
| Alliant Reloder-26 | <<locked>> | 88% | 34,969 psi | 56% | 2756 fps | 96% |
| Baschieri & Pellagri 107 | <<locked>> | 80% | 51,155 psi | 82% | 2943 fps | 99.7% |
| Bofors RP3 | <<locked>> | 80% | 44,208 psi | 71% | 2812 fps | 99.9% |
| Bofors RP5 | <<locked>> | 98% | 46,673 psi | 75% | 2956 fps | 95.5% |
| Bofors RP7 | <<locked>> | 82% | 41,669 psi | 67% | 2726 fps | 95% |
| Hodgdon H380 | <<locked>> | 80% | 44,686 psi | 72% | 2818 fps | 98.5% |
| Hodgdon H414 | <<locked>> | 84% | 42,177 psi | 68% | 2818 fps | 95.9% |
| Hodgdon H4350 | <<locked>> | 84% | 45,411 psi | 73% | 2841 fps | 95.3% |
| Hodgdon H4895 | <<locked>> | 80% | 52,141 psi | 84% | 2943 fps | 100% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 31,749 psi | 51% | 2552 fps | 97.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 48,443 psi | 78% | 2920 fps | 100% |
| Hodgdon Superformance | <<locked>> | 84% | 41,321 psi | 66% | 2825 fps | 95.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,890 psi | 43% | 1670 fps | 100% |
| Hodgdon VARGET | <<locked>> | 80% | 49,951 psi | 80% | 2894 fps | 100% |
| IMR 3031 | <<locked>> | 80% | 52,373 psi | 84% | 2923 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 46,035 psi | 74% | 2812 fps | 99.5% |
| IMR 4166 Enduron | <<locked>> | 80% | 48,211 psi | 77% | 2835 fps | 97.4% |
| IMR 4350 | <<locked>> | 86% | 42,090 psi | 67% | 2756 fps | 95.2% |
| IMR 4451 Enduron | <<locked>> | 80% | 40,437 psi | 65% | 2700 fps | 95.2% |
| IMR 4831 | <<locked>> | 80% | 33,373 psi | 54% | 2595 fps | 96% |
| IMR 4895 | <<locked>> | 80% | 48,341 psi | 78% | 2904 fps | 99.9% |
| Lovex D073.6 | <<locked>> | 80% | 51,561 psi | 83% | 2907 fps | 100% |
| Lovex S060 | <<locked>> | 80% | 50,778 psi | 81% | 2861 fps | 100% |
| Lovex S062 | <<locked>> | 80% | 46,267 psi | 74% | 2815 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 38,145 psi | 61% | 2654 fps | 96.1% |
| Lovex S070 | <<locked>> | 82% | 38,711 psi | 62% | 2684 fps | 95% |
| Lovex S071 | <<locked>> | 96% | 36,593 psi | 59% | 2671 fps | 95.2% |
| Norma 201 | <<locked>> | 80% | 50,517 psi | 81% | 2881 fps | 100% |
| Norma 202 | <<locked>> | 80% | 51,053 psi | 82% | 2881 fps | 100% |
| Norma 203B | <<locked>> | 80% | 46,499 psi | 75% | 2858 fps | 99.7% |
| Norma 204 | <<locked>> | 90% | 48,037 psi | 77% | 2913 fps | 95.5% |
| Norma MRP | <<locked>> | 92% | 40,176 psi | 64% | 2848 fps | 95% |
| Norma URP | <<locked>> | 80% | 34,737 psi | 56% | 2641 fps | 96.2% |
| Ramshot Big Game | <<locked>> | 80% | 46,514 psi | 75% | 2877 fps | 99.7% |
| Ramshot Hunter | <<locked>> | 84% | 38,435 psi | 62% | 2743 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,499 psi | 44% | 1716 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 44,846 psi | 72% | 2799 fps | 97.2% |
| ReloadSwiss RS 52 | <<locked>> | 80% | 50,618 psi | 81% | 2992 fps | 99.8% |
| ReloadSwiss RS 60 | 39 gr | 80% | 40,944 psi | 66% | 2851 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 34,461 psi | 55% | 2661 fps | 95.9% |
| ReloadSwiss RS 70 | <<locked>> | 82% | 36,172 psi | 58% | 2723 fps | 95.9% |
| Rottweil R 902 | <<locked>> | 80% | 47,834 psi | 77% | 2825 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 41,597 psi | 67% | 2756 fps | 99.5% |
| Rottweil R 904 | <<locked>> | 96% | 52,156 psi | 84% | 2956 fps | 95.4% |
| Rottweil R 905 | <<locked>> | 94% | 45,339 psi | 73% | 2884 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 82% | 41,669 psi | 67% | 2726 fps | 95% |
| Shooters World Long Rifle | <<locked>> | 80% | 38,145 psi | 61% | 2654 fps | 96.1% |
| Shooters World Match Rifle | <<locked>> | 80% | 51,561 psi | 83% | 2907 fps | 100% |
| Shooters World Precision | <<locked>> | 80% | 46,267 psi | 74% | 2815 fps | 100% |
| Shooters World SW4350 | <<locked>> | 82% | 38,711 psi | 62% | 2684 fps | 95% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 42,627 psi | 68% | 2808 fps | 99.3% |
| SNPE Vectan SP 7 | <<locked>> | 80% | 52,446 psi | 84% | 2933 fps | 99.5% |
| SNPE Vectan SP 9 | <<locked>> | 80% | 50,009 psi | 80% | 2900 fps | 99.9% |
| SNPE Vectan Tubal 3000 | <<locked>> | 80% | 51,445 psi | 82% | 2818 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 43,308 psi | 69% | 2677 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 82% | 39,798 psi | 64% | 2651 fps | 95.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 44,904 psi | 72% | 2881 fps | 95% |
| Somchem S335 | <<locked>> | 80% | 51,126 psi | 82% | 2815 fps | 100% |
| Somchem S341 | <<locked>> | 80% | 52,083 psi | 84% | 2920 fps | 100% |
| Somchem S355 | <<locked>> | 80% | 42,134 psi | 68% | 2756 fps | 99.5% |
| Somchem S365 | <<locked>> | 80% | 31,227 psi | 50% | 2595 fps | 98.4% |
| Somchem S385 | <<locked>> | 92% | 43,265 psi | 69% | 2812 fps | 95.5% |
| Vihtavuori N133 | <<locked>> | 80% | 51,967 psi | 83% | 2802 fps | 100% |
| Vihtavuori N135 | <<locked>> | 80% | 48,167 psi | 77% | 2799 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 48,414 psi | 78% | 2812 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 40,161 psi | 64% | 2684 fps | 99.8% |
| Vihtavuori N160 | <<locked>> | 80% | 36,100 psi | 58% | 2644 fps | 96.7% |
| Vihtavuori N165 | <<locked>> | 98% | 45,339 psi | 73% | 2838 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 46,702 psi | 75% | 2799 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 35,578 psi | 57% | 2644 fps | 96.3% |
| Vihtavuori N555 | <<locked>> | 84% | 31,038 psi | 50% | 2589 fps | 95.6% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 35,404 psi | 57% | 2615 fps | 98.6% |
| Winchester 760 | <<locked>> | 84% | 42,177 psi | 68% | 2818 fps | 95.9% |
| Winchester StaBALL HD | <<locked>> | 88% | 28,442 psi | 46% | 2592 fps | 96.2% |
| Winchester StaBALL Match | <<locked>> | 80% | 49,893 psi | 80% | 2907 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 96% | 45,876 psi | 74% | 2854 fps | 95% |
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 95 powders for .244 Rem. loaded with the .243 | 100gr | Hornady InterLock RN. Alliant Reloder-26 delivers the highest muzzle velocity at 3,166 fps; across all powders the maximum-charge window runs from 1,873 fps to 3,166 fps. Accurate 3100 gives the best case fill at 100 %, and 95 of the 95 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.243" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, Accurate High Country, Alliant Reloder-22 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-17, ReloadSwiss RS 60, Alliant Reloder-16 rank at the top here: for .244 Rem. with the .243 | 100gr | Hornady InterLock RN 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.