Load Specifications
Load data in caliber .243 Win. with .243 | 100gr | Hornady InterLock 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 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.
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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% | 53,766 psi | 89% | 2782 fps | 100% |
| Accurate 2700 | <<locked>> | 82% | 51,837 psi | 86% | 2789 fps | 98% |
| Accurate 3100ᴾ | <<locked>> | 100% | 53,011 psi | 88% | 2877 fps | 99.4% |
| Accurate 4064 | <<locked>> | 84% | 54,215 psi | 90% | 2838 fps | 100% |
| Accurate 4350 | <<locked>> | 90% | 51,488 psi | 86% | 2884 fps | 99.9% |
| ADI AR 2208 | <<locked>> | 86% | 54,418 psi | 90% | 2867 fps | 100% |
| ADI AR 2209 | <<locked>> | 96% | 52,765 psi | 88% | 2920 fps | 97.5% |
| ADI AR 2213ᴾ | <<locked>> | 100% | 53,969 psi | 90% | 2963 fps | 96.5% |
| Alliant Power Pro 2000-MR | <<locked>> | 82% | 53,679 psi | 89% | 2989 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 84% | 51,706 psi | 86% | 2841 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 82% | 51,808 psi | 86% | 2858 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 92% | 52,286 psi | 87% | 2940 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 88% | 53,272 psi | 89% | 2963 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 96% | 51,982 psi | 86% | 2907 fps | 97.5% |
| Alliant Reloder-22ᴾ | <<locked>> | 100% | 52,692 psi | 88% | 2959 fps | 97.8% |
| Alliant Reloder-23ᴾ | <<locked>> | 100% | 49,632 psi | 82% | 2897 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 43,453 psi | 72% | 2818 fps | 98.8% |
| Alliant Reloder-26 | <<locked>> | 98% | 53,258 psi | 88% | 3028 fps | 100% |
| Bofors RP15ᴾ | <<locked>> | 100% | 48,196 psi | 80% | 2881 fps | 96.7% |
| Bofors RP3 | <<locked>> | 84% | 52,649 psi | 87% | 2858 fps | 100% |
| Bofors RP5ᴾ | <<locked>> | 100% | 52,692 psi | 88% | 2959 fps | 97.8% |
| Bofors RP7 | <<locked>> | 88% | 52,040 psi | 86% | 2835 fps | 98.2% |
| Hodgdon H380 | <<locked>> | 84% | 53,011 psi | 88% | 2871 fps | 99.8% |
| Hodgdon H414 | <<locked>> | 90% | 53,505 psi | 89% | 2927 fps | 98.9% |
| Hodgdon H4350 | <<locked>> | 88% | 53,476 psi | 89% | 2890 fps | 97.9% |
| Hodgdon H4831 | <<locked>> | 98% | 54,143 psi | 90% | 2910 fps | 95.9% |
| Hodgdon Hybrid 100V | <<locked>> | 94% | 52,547 psi | 87% | 2864 fps | 100% |
| Hodgdon LEVERevolution | <<locked>> | 82% | 54,041 psi | 90% | 2904 fps | 100% |
| Hodgdon Superformance | <<locked>> | 90% | 53,795 psi | 89% | 2963 fps | 98.9% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 36,216 psi | 60% | 1834 fps | 100% |
| IMR 4064 | <<locked>> | 84% | 53,766 psi | 89% | 2851 fps | 100% |
| IMR 4166 Enduron | <<locked>> | 82% | 53,098 psi | 88% | 2828 fps | 98.7% |
| IMR 4350 | <<locked>> | 92% | 53,229 psi | 88% | 2867 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 88% | 53,809 psi | 89% | 2864 fps | 98.8% |
| IMR 4831 | <<locked>> | 92% | 51,953 psi | 86% | 2874 fps | 99.9% |
| IMR 4895 | <<locked>> | 82% | 53,156 psi | 88% | 2887 fps | 100% |
| IMR 7828 SSCᴾ | <<locked>> | 100% | 51,300 psi | 85% | 2933 fps | 96% |
| Lovex S062 | <<locked>> | 84% | 54,027 psi | 90% | 2844 fps | 100% |
| Lovex S065 | <<locked>> | 90% | 53,867 psi | 89% | 2861 fps | 99.6% |
| Lovex S070 | <<locked>> | 90% | 51,648 psi | 86% | 2844 fps | 98.8% |
| Lovex S071ᴾ | <<locked>> | 100% | 43,801 psi | 73% | 2726 fps | 98.1% |
| Norma 203B | <<locked>> | 82% | 51,169 psi | 85% | 2844 fps | 100% |
| Norma 204 | <<locked>> | 92% | 53,534 psi | 89% | 2910 fps | 97.5% |
| Norma MRP | <<locked>> | 98% | 52,156 psi | 87% | 2982 fps | 98.9% |
| Norma URP | <<locked>> | 92% | 53,664 psi | 89% | 2920 fps | 100% |
| Ramshot Big Game | <<locked>> | 82% | 52,025 psi | 86% | 2867 fps | 100% |
| Ramshot Grandᴾ | <<locked>> | 100% | 51,663 psi | 86% | 2943 fps | 96.5% |
| Ramshot Hunter | <<locked>> | 92% | 52,504 psi | 87% | 2913 fps | 99.4% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 46,035 psi | 76% | 2815 fps | 97% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 36,854 psi | 61% | 1877 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 84% | 52,968 psi | 88% | 2851 fps | 99.2% |
| ReloadSwiss RS 60 | <<locked>> | 86% | 52,953 psi | 88% | 2959 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 90% | 51,198 psi | 85% | 2900 fps | 99.8% |
| ReloadSwiss RS 70 | <<locked>> | 92% | 53,577 psi | 89% | 2982 fps | 99.9% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 42,598 psi | 71% | 2831 fps | 97% |
| Rottweil R 902 | <<locked>> | 82% | 52,692 psi | 88% | 2812 fps | 100% |
| Rottweil R 903 | <<locked>> | 86% | 52,489 psi | 87% | 2848 fps | 100% |
| Rottweil R 904 | <<locked>> | 96% | 54,404 psi | 90% | 2890 fps | 96.7% |
| Rottweil R 905 | <<locked>> | 96% | 51,242 psi | 85% | 2894 fps | 97.5% |
| Rottweil R 907 | <<locked>> | 88% | 52,040 psi | 86% | 2835 fps | 98.2% |
| Shooters World Long Rifle | <<locked>> | 90% | 53,867 psi | 89% | 2861 fps | 99.6% |
| Shooters World Precision | <<locked>> | 84% | 54,027 psi | 90% | 2844 fps | 100% |
| Shooters World SW4350 | <<locked>> | 90% | 51,648 psi | 86% | 2844 fps | 98.8% |
| SNPE Vectan SP 11 | <<locked>> | 86% | 54,070 psi | 90% | 2907 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 86% | 53,621 psi | 89% | 2743 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 90% | 53,708 psi | 89% | 2812 fps | 98.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 98% | 54,288 psi | 90% | 2943 fps | 98% |
| Somchem S355 | <<locked>> | 86% | 52,649 psi | 87% | 2848 fps | 100% |
| Somchem S365 | <<locked>> | 94% | 53,127 psi | 88% | 2927 fps | 100% |
| Somchem S385 | <<locked>> | 96% | 51,953 psi | 86% | 2867 fps | 98.3% |
| Vihtavuori N135 | <<locked>> | 82% | 52,823 psi | 88% | 2772 fps | 100% |
| Vihtavuori N140 | <<locked>> | 82% | 53,113 psi | 88% | 2782 fps | 100% |
| Vihtavuori N150 | <<locked>> | 88% | 53,824 psi | 89% | 2822 fps | 100% |
| Vihtavuori N160 | <<locked>> | 90% | 52,475 psi | 87% | 2864 fps | 99.9% |
| Vihtavuori N165ᴾ | <<locked>> | 100% | 51,082 psi | 85% | 2838 fps | 97.8% |
| Vihtavuori N540 | <<locked>> | 82% | 51,358 psi | 85% | 2779 fps | 100% |
| Vihtavuori N550 | <<locked>> | 90% | 51,764 psi | 86% | 2867 fps | 99.8% |
| Vihtavuori N555 | <<locked>> | 98% | 51,967 psi | 86% | 2923 fps | 100% |
| Vihtavuori N560 | <<locked>> | 98% | 52,562 psi | 87% | 2969 fps | 95.9% |
| Winchester 6.5 StaBALL | <<locked>> | 90% | 52,112 psi | 87% | 2828 fps | 100% |
| Winchester 760 | <<locked>> | 90% | 53,925 psi | 90% | 2936 fps | 99% |
| Winchester StaBALL HDᴾ | <<locked>> | 100% | 45,020 psi | 75% | 2953 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 98% | 51,793 psi | 86% | 2858 fps | 97.3% |
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% | 50,270 psi | 84% | 2736 fps | 100% |
| Accurate 2700 | <<locked>> | 80% | 48,356 psi | 80% | 2733 fps | 97.3% |
| Accurate 3100 | <<locked>> | 88% | 35,099 psi | 58% | 2549 fps | 95.5% |
| Accurate 4064 | <<locked>> | 80% | 47,616 psi | 79% | 2743 fps | 100% |
| Accurate 4350 | <<locked>> | 80% | 36,143 psi | 60% | 2595 fps | 97.6% |
| ADI AR 2208 | <<locked>> | 80% | 45,266 psi | 75% | 2717 fps | 99.6% |
| ADI AR 2209 | <<locked>> | 90% | 43,337 psi | 72% | 2749 fps | 95.1% |
| ADI AR 2213 | <<locked>> | 98% | 50,444 psi | 84% | 2904 fps | 95.6% |
| Alliant Power Pro 2000-MR | <<locked>> | 80% | 49,821 psi | 83% | 2927 fps | 100% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 45,455 psi | 76% | 2740 fps | 100% |
| Alliant Reloder-15 | <<locked>> | 80% | 48,588 psi | 81% | 2805 fps | 99.9% |
| Alliant Reloder-16 | 35.4 gr | 80% | 35,491 psi | 59% | 2608 fps | 97.6% |
| Alliant Reloder-17 | <<locked>> | 80% | 40,132 psi | 67% | 2733 fps | 99.7% |
| Alliant Reloder-19 | <<locked>> | 90% | 42,830 psi | 71% | 2740 fps | 95.1% |
| Alliant Reloder-22 | <<locked>> | 94% | 43,207 psi | 72% | 2785 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 82% | 27,601 psi | 46% | 2411 fps | 96% |
| Alliant Reloder-25 | <<locked>> | 92% | 33,663 psi | 56% | 2585 fps | 95.4% |
| Alliant Reloder-26 | 41 gr | 84% | 31,836 psi | 53% | 2585 fps | 95.5% |
| Bofors RP15 | <<locked>> | 98% | 45,165 psi | 75% | 2825 fps | 95.9% |
| Bofors RP3 | <<locked>> | 80% | 45,788 psi | 76% | 2749 fps | 100% |
| Bofors RP5 | <<locked>> | 94% | 43,207 psi | 72% | 2785 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 40,553 psi | 67% | 2618 fps | 95.5% |
| Hodgdon H380 | <<locked>> | 80% | 46,253 psi | 77% | 2756 fps | 99.2% |
| Hodgdon H414 | <<locked>> | 80% | 38,305 psi | 64% | 2644 fps | 95.4% |
| Hodgdon H4350 | <<locked>> | 82% | 43,888 psi | 73% | 2720 fps | 95.7% |
| Hodgdon H4831 | <<locked>> | 96% | 50,618 psi | 84% | 2851 fps | 95% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 32,822 psi | 55% | 2500 fps | 98.2% |
| Hodgdon LEVERevolution | <<locked>> | 80% | 50,647 psi | 84% | 2854 fps | 100% |
| Hodgdon Superformance | <<locked>> | 82% | 40,176 psi | 67% | 2710 fps | 95.7% |
| Hodgdon TrailBoss | <<locked>> | 80% | 26,905 psi | 45% | 1640 fps | 100% |
| IMR 4064 | <<locked>> | 80% | 47,601 psi | 79% | 2753 fps | 99.9% |
| IMR 4166 Enduron | <<locked>> | 80% | 49,879 psi | 83% | 2776 fps | 98.3% |
| IMR 4350 | <<locked>> | 84% | 41,017 psi | 68% | 2648 fps | 95.7% |
| IMR 4451 Enduron | <<locked>> | 80% | 41,872 psi | 70% | 2651 fps | 96.4% |
| IMR 4831 | <<locked>> | 80% | 34,896 psi | 58% | 2552 fps | 97.2% |
| IMR 4895 | <<locked>> | 80% | 49,850 psi | 83% | 2835 fps | 100% |
| IMR 7828 SSC | <<locked>> | 98% | 47,979 psi | 80% | 2871 fps | 95.1% |
| Lovex S062 | <<locked>> | 80% | 47,587 psi | 79% | 2746 fps | 100% |
| Lovex S065 | <<locked>> | 80% | 39,291 psi | 65% | 2598 fps | 97.1% |
| Lovex S070 | <<locked>> | 80% | 37,536 psi | 62% | 2575 fps | 95.4% |
| Lovex S071 | <<locked>> | 92% | 33,779 psi | 56% | 2520 fps | 95% |
| Norma 203B | <<locked>> | 80% | 47,964 psi | 80% | 2792 fps | 100% |
| Norma 204 | <<locked>> | 86% | 43,613 psi | 72% | 2733 fps | 95.1% |
| Norma MRP | 42.6 gr | 90% | 39,334 psi | 65% | 2736 fps | 95.7% |
| Norma URP | <<locked>> | 80% | 36,027 psi | 60% | 2592 fps | 97.4% |
| Ramshot Big Game | <<locked>> | 80% | 48,399 psi | 80% | 2812 fps | 100% |
| Ramshot Grand | <<locked>> | 98% | 48,225 psi | 80% | 2881 fps | 95.5% |
| Ramshot Hunter | <<locked>> | 80% | 35,012 psi | 58% | 2575 fps | 95.2% |
| Ramshot Magnum | <<locked>> | 98% | 42,946 psi | 71% | 2756 fps | 96.1% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 27,557 psi | 46% | 1686 fps | 100% |
| ReloadSwiss RS 50 | <<locked>> | 80% | 46,412 psi | 77% | 2740 fps | 98.2% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 42,641 psi | 71% | 2792 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 36,071 psi | 60% | 2612 fps | 97.2% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 35,157 psi | 58% | 2615 fps | 96.4% |
| ReloadSwiss RS 76 | <<locked>> | 98% | 39,595 psi | 66% | 2759 fps | 95.8% |
| Rottweil R 902 | <<locked>> | 80% | 49,429 psi | 82% | 2762 fps | 100% |
| Rottweil R 903 | <<locked>> | 80% | 43,047 psi | 72% | 2694 fps | 99.9% |
| Rottweil R 904 | <<locked>> | 92% | 47,747 psi | 79% | 2779 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 90% | 41,843 psi | 70% | 2720 fps | 95% |
| Rottweil R 907 | <<locked>> | 80% | 40,553 psi | 67% | 2618 fps | 95.5% |
| Shooters World Long Rifle | <<locked>> | 80% | 39,291 psi | 65% | 2598 fps | 97.1% |
| Shooters World Precision | <<locked>> | 80% | 47,587 psi | 79% | 2746 fps | 100% |
| Shooters World SW4350 | <<locked>> | 80% | 37,536 psi | 62% | 2575 fps | 95.4% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 44,222 psi | 73% | 2746 fps | 99.7% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 44,715 psi | 74% | 2615 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 38,566 psi | 64% | 2543 fps | 95.6% |
| SNPE Vectan Tubal 8000 | <<locked>> | 92% | 44,367 psi | 74% | 2772 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 43,381 psi | 72% | 2694 fps | 99.8% |
| Somchem S365 | <<locked>> | 80% | 32,489 psi | 54% | 2549 fps | 99.2% |
| Somchem S385 | <<locked>> | 88% | 39,755 psi | 66% | 2648 fps | 95.3% |
| Vihtavuori N135 | <<locked>> | 80% | 49,806 psi | 83% | 2730 fps | 100% |
| Vihtavuori N140 | <<locked>> | 80% | 49,792 psi | 83% | 2736 fps | 100% |
| Vihtavuori N150 | <<locked>> | 80% | 41,437 psi | 69% | 2625 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 37,405 psi | 62% | 2592 fps | 97.8% |
| Vihtavuori N165 | <<locked>> | 94% | 41,843 psi | 70% | 2677 fps | 95.5% |
| Vihtavuori N540 | <<locked>> | 80% | 48,240 psi | 80% | 2730 fps | 100% |
| Vihtavuori N550 | <<locked>> | 80% | 36,970 psi | 61% | 2592 fps | 97.4% |
| Vihtavuori N555 | <<locked>> | 80% | 28,311 psi | 47% | 2431 fps | 95.1% |
| Vihtavuori N560 | <<locked>> | 96% | 49,226 psi | 82% | 2910 fps | 95% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 36,869 psi | 61% | 2566 fps | 99.4% |
| Winchester 760 | <<locked>> | 80% | 38,305 psi | 64% | 2644 fps | 95.4% |
| Winchester StaBALL HD | <<locked>> | 84% | 26,165 psi | 43% | 2438 fps | 95.8% |
| Winchester Supreme 780 | <<locked>> | 94% | 45,179 psi | 75% | 2743 fps | 95.8% |
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 93 powders for .243 Win. loaded with the .243 | 100gr | Hornady InterLock. Alliant Reloder-26 delivers the highest muzzle velocity at 3,028 fps; across all powders the maximum-charge window runs from 1,834 fps to 3,028 fps. Accurate 3100 gives the best case fill at 100 %, and 93 of the 93 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (415 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 100.0 gr projectile in 0.243" calls for a 1:10.0 twist; slower twists will usually not stabilise this weight. Accurate 3100, ADI AR 2213, ADI AR 2225 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, Alliant Reloder-16 rank at the top here: for .243 Win. with the .243 | 100gr | Hornady InterLock they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Accurate MAGPRO, ADI AR 2225, Baschieri & Pellagri 109 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.