Mostly I use a Lyman 225462 cast of #2 alloy, WQ'd and sized "as cast" at .227. I've also used the Lyman 225438 cast the same but the 225462 holds up better at longer ranges. Both are used in 222s, 223s and 22-250s.
The 225107 and 225415s are used for hunting small vermin out to 150 yards in my 22 Hornets.
In faster twists I've worked a bit with a MP 227-65 in the 223 but have not developed anything past 100 yards with it.
So far I've found it hard to beat the 225462.
Larry Gibson