Have put many hundreds of rounds through mine, loads of variety. Have found a sweet spot for reloads, 3.5gr Bullseye behind a 125gr LTC bullet, getting excellent groups and good reliability, have some LRN on order.
Have had the odd case not fully eject and end up in the action.
Does not like FMJ-TC, when loading rounds occasionally hit the top of the breech and wedge themselves, I reckon the short COL is to blame.
Ordinary FMJ (RN) is perfect, works fine with NATO spec stuff i.e. RG & FNM and also commercial Howitzer (115gr) but my range is lead only hence the reloads.
Have sourced a load of 25rd UZI mags and am checking compatibility, it seems like Bob does not go by the spec below, his mags seat slightly higher, am having a crack so see what works best, mate has them at his machine shop, may advertise any spares on here in the EE.
Just need Bradders to get some rails in stock so I can stick my shiny new ebay special EOTech on it.