Redding offers the more expensive FL or neck bushing dies--for example
The most common 20 calibers...20 Vartarg--20 Practical---20-222.. that I use anyhow
Use a 221 FB..223 Rem..or the ole 222 Rem & a bushing die with a .227" -.230" bushing
FL or neck size & load ammo...seat bullets with the parent cartridge die..simple......or 'Practical'
The 20 Tactical is another......but never got involved with it...Along with many others
https://www.accurateshooter.com/cartridge-guides/20caliber/