So my brother and I went out shooting this morning testing more high velocity cast .308 bullets.
I had some mixed results. Some of the 30 XCB bullets @ 2530 did okay until the barrel got hot then the shots started to wander.
These were 166gr bullets sized to .311" and lubed with 2500+ and a coat of BLL. These were loaded with 46.5gr H414 @ 2530fps
The second attempt was 47.5gr at 2605fps and I was able to get a sub 2 MOA five shot group.
https://www.youtube.com/watch?v=l9VDouNYi7A