I started playing with 143 ELD-Xs using RL16 and -26.
RL16 42.5 2679 43 2710 43.5 2745 44 2762
Best accuracy based on a single three shot group was at 1” for all three groups. Not really great.
RL26 Worked up to 48 which showed 2737 on my Magnetospeed. Actually two shots, 2738 and 2736. A single three shot group was .58”. Worth trying again to verify.
Very nice!! 48 grains is what works in my Tikka with the 143s as well. But its getting 2850 on virgin lapua brass. For some reason now that same load is going 2910 fps in the once fired brass, but primer pockets are still tight and zero pressure signs so far good.