I tried that load today and it was almost as good as what I got with the 23.5 gr. Opened up slightly. I may experiment with the 23.8 using various seating depths, but I found that this particular M70 likes these 68 gr Hornady bullets .020" short of the lands, at least with the last charge of 23.5. I've also stopped cleaning the bore like before and think that is having a positive effect on my accuracy. Before I'd always scrub it squeaky clean. Now all I've been doing is running a couple of patches wet with a 50/50 mix of ATF and mineral spirits. It won't melt any copper fouling but it is very good at cleaning carbon. Cheap as hell too. As long as it keep trying to put bullets through the same hole I'm not going to brush it out.Awesome shooting! It ain't all rifle.
You're load is almost identical to what I feed my 1:9 and faster twist .223s. I use just a tad more powder (23.8 gr.) of 8208 XBR behind the Hornady 68 gr. bullet. I've yet to see a .223 that wouldn't shoot that load at least acceptably. Great combination.
Again, nice shooting!