Load Specifications
Load data in caliber .243 Win. with .243 | 100gr | Hornady InterLock RN bullet and 83 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Alliant Reloder-26, Norma MRP and Accurate High Country.
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>> | 82% | 54,462 psi | 90% | 2792 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 52,040 psi | 86% | 2795 fps | 98.1% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,911 psi | 90% | 2890 fps | 99.5% |
| Accurate 4064 | <<locked>> | 82% | 51,488 psi | 86% | 2799 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 52,141 psi | 87% | 2894 fps | 99.9% |
| Accurate High Country | <<locked>> | 96% | 50,981 psi | 85% | 2966 fps | 96.4% |
| ADI AR 2208 | <<locked>> | 84% | 51,692 psi | 86% | 2828 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 53,258 psi | 88% | 2930 fps | 97.7% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 54,288 psi | 90% | 2999 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 96% | 53,200 psi | 88% | 2927 fps | 97.7% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 52,359 psi | 87% | 2851 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 52,475 psi | 87% | 2871 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 52,881 psi | 88% | 2953 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 53,896 psi | 90% | 2972 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 52,489 psi | 87% | 2917 fps | 97.6% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 53,592 psi | 89% | 2976 fps | 98% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 50,502 psi | 84% | 2913 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,888 psi | 73% | 2828 fps | 98.9% |
| Alliant Reloder-26 | <<locked>> | 98% | 54,172 psi | 90% | 3045 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 49,052 psi | 81% | 2897 fps | 97% |
| Bofors RP3 | <<locked>> | 84% | 52,881 psi | 88% | 2861 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 53,592 psi | 89% | 2976 fps | 98% |
| Bofors RP7 | <<locked>> | 88% | 52,620 psi | 87% | 2844 fps | 98.3% |
| Hodgdon H380 | <<locked>> | 84% | 53,621 psi | 89% | 2881 fps | 99.9% |
| Hodgdon H414 | <<locked>> | 90% | 54,056 psi | 90% | 2940 fps | 99.1% |
| Hodgdon H4350 | <<locked>> | 88% | 54,056 psi | 90% | 2900 fps | 98.1% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 53,142 psi | 88% | 2874 fps | 100% |
| Hodgdon Superformance | <<locked>> | 88% | 50,444 psi | 84% | 2910 fps | 98.4% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,405 psi | 60% | 1841 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 54,404 psi | 90% | 2861 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 53,664 psi | 89% | 2841 fps | 98.9% |
| IMR 4350 | <<locked>> | 92% | 53,751 psi | 89% | 2877 fps | 98.6% |
| IMR 4451 Enduron | <<locked>> | 88% | 54,375 psi | 90% | 2874 fps | 98.9% |
| IMR 4831 | <<locked>> | 92% | 52,562 psi | 87% | 2884 fps | 100% |
| IMR 4895 | <<locked>> | 82% | 53,824 psi | 89% | 2897 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 96% | 52,910 psi | 88% | 2858 fps | 95.9% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 52,127 psi | 87% | 2949 fps | 96.3% |
| Lovex S062 | <<locked>> | 82% | 51,343 psi | 85% | 2805 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 54,447 psi | 90% | 2871 fps | 99.7% |
| Lovex S070 | <<locked>> | 90% | 52,185 psi | 87% | 2854 fps | 98.9% |
| Lovex S071ᴾ | <<locked>> | 100% | 44,614 psi | 74% | 2743 fps | 98.3% |
| Norma 203B | <<locked>> | 82% | 51,779 psi | 86% | 2858 fps | 100% |
| Norma 204 | <<locked>> | 92% | 54,447 psi | 90% | 2927 fps | 97.7% |
| Norma MRP | <<locked>> | 98% | 53,040 psi | 88% | 2999 fps | 99% |
| Norma URP | <<locked>> | 92% | 54,259 psi | 90% | 2930 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 52,591 psi | 87% | 2877 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 52,098 psi | 87% | 2953 fps | 96.7% |
| Ramshot Hunter | <<locked>> | 92% | 53,432 psi | 89% | 2930 fps | 99.5% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,746 psi | 78% | 2831 fps | 97.3% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,738 psi | 61% | 1880 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 53,548 psi | 89% | 2861 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 53,592 psi | 89% | 2969 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 51,735 psi | 86% | 2910 fps | 99.9% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 54,070 psi | 90% | 2992 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,946 psi | 71% | 2844 fps | 97.2% |
| Rottweil R 902 | <<locked>> | 82% | 53,330 psi | 89% | 2822 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 53,156 psi | 88% | 2861 fps | 100% |
| Rottweil R 904 | <<locked>> | 94% | 51,503 psi | 86% | 2848 fps | 96.1% |
| Rottweil R 905 | <<locked>> | 96% | 51,779 psi | 86% | 2900 fps | 97.6% |
| Rottweil R 907 | <<locked>> | 88% | 52,620 psi | 87% | 2844 fps | 98.3% |
| Shooters World Long Rifle | <<locked>> | 90% | 54,447 psi | 90% | 2871 fps | 99.7% |
| Shooters World Precision | <<locked>> | 82% | 51,343 psi | 85% | 2805 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 52,185 psi | 87% | 2854 fps | 98.9% |
| SNPE Vectan SP 11 | <<locked>> | 84% | 51,329 psi | 85% | 2867 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 54,215 psi | 90% | 2753 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 54,230 psi | 90% | 2822 fps | 99% |
| SNPE Vectan Tubal 8000 | <<locked>> | 96% | 51,314 psi | 85% | 2897 fps | 97.5% |
| Somchem S355 | <<locked>> | 86% | 53,287 psi | 89% | 2858 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 53,751 psi | 89% | 2933 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 52,446 psi | 87% | 2877 fps | 98.4% |
| Vihtavuori N135 | <<locked>> | 82% | 53,577 psi | 89% | 2782 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 53,737 psi | 89% | 2792 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 54,418 psi | 90% | 2828 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 53,055 psi | 88% | 2874 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,938 psi | 86% | 2854 fps | 98% |
| Vihtavuori N540 | <<locked>> | 82% | 51,967 psi | 86% | 2785 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 52,301 psi | 87% | 2881 fps | 99.9% |
| Vihtavuori N555 | <<locked>> | 98% | 52,939 psi | 88% | 2936 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 53,403 psi | 89% | 2986 fps | 96.2% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 52,620 psi | 87% | 2838 fps | 100% |
| Winchester 760 | <<locked>> | 88% | 50,749 psi | 84% | 2884 fps | 98.6% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,455 psi | 76% | 2963 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 52,663 psi | 87% | 2874 fps | 97.6% |
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% | 51,010 psi | 85% | 2749 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,878 psi | 81% | 2743 fps | 97.5% |
| Accurate 3100 | <<locked>> | 88% | 35,578 psi | 59% | 2559 fps | 95.7% |
| Accurate 4064 | <<locked>> | 80% | 48,283 psi | 80% | 2753 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,724 psi | 61% | 2608 fps | 97.8% |
| Accurate High Country | 45 gr | 94% | 47,659 psi | 79% | 2907 fps | 95.6% |
| ADI AR 2208 | <<locked>> | 80% | 45,542 psi | 76% | 2726 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 90% | 43,453 psi | 72% | 2753 fps | 95.2% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 50,459 psi | 84% | 2936 fps | 100% |
| Alliant Power Pro Varmint | <<locked>> | 90% | 43,830 psi | 73% | 2756 fps | 95.4% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 46,079 psi | 77% | 2749 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 49,211 psi | 82% | 2818 fps | 99.9% |
| Alliant Reloder-16 | <<locked>> | 80% | 35,737 psi | 59% | 2618 fps | 97.8% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,683 psi | 68% | 2746 fps | 99.8% |
| Alliant Reloder-19 | <<locked>> | 90% | 43,323 psi | 72% | 2749 fps | 95.3% |
| Alliant Reloder-22 | <<locked>> | 94% | 43,656 psi | 73% | 2799 fps | 95.6% |
| Alliant Reloder-23 | <<locked>> | 80% | 26,252 psi | 44% | 2369 fps | 95.2% |
| Alliant Reloder-25 | <<locked>> | 92% | 34,040 psi | 57% | 2598 fps | 95.7% |
| Alliant Reloder-26 | 41.4 gr | 84% | 32,271 psi | 54% | 2595 fps | 95.8% |
| Bofors RP15 | <<locked>> | 96% | 42,743 psi | 71% | 2779 fps | 95.2% |
| Bofors RP3 | <<locked>> | 80% | 46,427 psi | 77% | 2759 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 43,656 psi | 73% | 2799 fps | 95.6% |
| Bofors RP7 | <<locked>> | 80% | 40,799 psi | 68% | 2628 fps | 95.6% |
| Hodgdon H380 | <<locked>> | 80% | 46,833 psi | 78% | 2769 fps | 99.3% |
| Hodgdon H414 | <<locked>> | 80% | 38,551 psi | 64% | 2651 fps | 95.6% |
| Hodgdon H4350 | <<locked>> | 80% | 41,640 psi | 69% | 2677 fps | 95.1% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 33,330 psi | 55% | 2513 fps | 98.4% |
| Hodgdon Superformance | <<locked>> | 82% | 40,640 psi | 68% | 2723 fps | 95.9% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,166 psi | 45% | 1650 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,892 psi | 80% | 2759 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 50,096 psi | 83% | 2782 fps | 98.3% |
| IMR 4350 | <<locked>> | 82% | 38,943 psi | 65% | 2605 fps | 95% |
| IMR 4451 Enduron | <<locked>> | 80% | 42,105 psi | 70% | 2657 fps | 96.5% |
| IMR 4831 | <<locked>> | 80% | 35,157 psi | 58% | 2559 fps | 97.4% |
| IMR 4895 | <<locked>> | 80% | 50,502 psi | 84% | 2848 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 94% | 49,705 psi | 83% | 2805 fps | 95.1% |
| IMR 7828 SSC | <<locked>> | 98% | 48,399 psi | 80% | 2881 fps | 95.3% |
| Lovex S062 | <<locked>> | 80% | 48,182 psi | 80% | 2756 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,798 psi | 66% | 2612 fps | 97.3% |
| Lovex S070 | <<locked>> | 80% | 38,029 psi | 63% | 2589 fps | 95.6% |
| Lovex S071 | <<locked>> | 92% | 34,287 psi | 57% | 2530 fps | 95.2% |
| Norma 203B | <<locked>> | 80% | 48,588 psi | 81% | 2805 fps | 100% |
| Norma 204 | <<locked>> | 86% | 44,092 psi | 73% | 2746 fps | 95.3% |
| Norma MRP | 43.1 gr | 90% | 40,103 psi | 67% | 2756 fps | 96.1% |
| Norma URP | <<locked>> | 80% | 36,550 psi | 61% | 2605 fps | 97.6% |
| Ramshot Big Game | <<locked>> | 80% | 49,037 psi | 81% | 2822 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 48,602 psi | 81% | 2890 fps | 95.7% |
| Ramshot Hunter | <<locked>> | 80% | 35,520 psi | 59% | 2589 fps | 95.5% |
| Ramshot Magnum | <<locked>> | 96% | 40,437 psi | 67% | 2707 fps | 95.3% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,528 psi | 46% | 1686 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,934 psi | 78% | 2753 fps | 98.3% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 43,236 psi | 72% | 2802 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,361 psi | 60% | 2621 fps | 97.4% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 35,607 psi | 59% | 2628 fps | 96.7% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 40,219 psi | 67% | 2779 fps | 96.1% |
| Rottweil R 902 | <<locked>> | 80% | 50,067 psi | 83% | 2772 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,656 psi | 73% | 2707 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 48,240 psi | 80% | 2792 fps | 95.3% |
| Rottweil R 905 | <<locked>> | 90% | 42,380 psi | 70% | 2733 fps | 95.2% |
| Rottweil R 907 | <<locked>> | 80% | 40,799 psi | 68% | 2628 fps | 95.6% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,798 psi | 66% | 2612 fps | 97.3% |
| Shooters World Precision | <<locked>> | 80% | 48,182 psi | 80% | 2756 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 38,029 psi | 63% | 2589 fps | 95.6% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,831 psi | 74% | 2756 fps | 99.8% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,976 psi | 75% | 2618 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 39,059 psi | 65% | 2552 fps | 95.8% |
| SNPE Vectan Tubal 8000 | <<locked>> | 90% | 41,974 psi | 70% | 2726 fps | 95.1% |
| Somchem S355 | <<locked>> | 80% | 43,976 psi | 73% | 2707 fps | 99.9% |
| Somchem S365 | <<locked>> | 80% | 32,996 psi | 55% | 2559 fps | 99.3% |
| Somchem S385 | <<locked>> | 88% | 40,205 psi | 67% | 2657 fps | 95.5% |
| Vihtavuori N135 | <<locked>> | 80% | 50,140 psi | 83% | 2736 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 50,430 psi | 84% | 2746 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 42,018 psi | 70% | 2635 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,956 psi | 63% | 2605 fps | 97.9% |
| Vihtavuori N165 | <<locked>> | 94% | 42,279 psi | 70% | 2687 fps | 95.7% |
| Vihtavuori N540 | <<locked>> | 80% | 48,805 psi | 81% | 2740 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 37,492 psi | 62% | 2605 fps | 97.7% |
| Vihtavuori N555 | <<locked>> | 80% | 28,819 psi | 48% | 2448 fps | 95.4% |
| Vihtavuori N560 | <<locked>> | 96% | 49,647 psi | 82% | 2920 fps | 95.2% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 37,304 psi | 62% | 2575 fps | 99.5% |
| Winchester 760 | <<locked>> | 80% | 38,827 psi | 65% | 2657 fps | 95.7% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,513 psi | 44% | 2454 fps | 96.2% |
| Winchester Supreme 780 | <<locked>> | 92% | 42,322 psi | 70% | 2690 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 83 powders for .243 Win. loaded with the .243 | 100gr | Hornady InterLock RN. Alliant Reloder-26 delivers the highest muzzle velocity at 3,045 fps; across all powders the maximum-charge window runs from 1,841 fps to 3,045 fps. Accurate 3100 gives the best case fill at 100 %, and 83 of the 83 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 60–90 %, 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, Alliant Reloder-22, 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 Reloder-26, Norma MRP, Accurate High Country rank at the top here: for .243 Win. 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.