Currently I have and shoot:
Thomson Super 14 Contender in 30 Herrett.
2 AR's in a 30 Herrett AR/HRT, one AR in .277 Wolverine and 5.56x6.8.
The TC is a 30 30 brass shortened to 1.605'' with a 30 deg shoulder.
The 30 Herrett AR/HRT is a 6.8 SPC brass shortened to 1.575", 30 Deg shoulder and expanded to a .30 caliber projectile. The .277 Wlv is a 5.56/.223 shortened to 1.530" and expanded to .277/6.8 projectiles and the 5.56x6.8 is a 6.8 SPC brass narrowed to .224 caliber projectiles.
I can shoot the AR cartridges in the TC even tho there is no rim on the brass for the ejection rod. However I need to be careful with the powder charge due to the added pressure for the AR chambers.