Update on the Aguila 60 gr .22 ammo (
@Snake45 @GasGuzzler ) - turns out the reliability issues were in part magazine related. The CMMG mags that came with the conversion kit look like they're very well built, high quality mags, but they were a loose fit in my FrankenCarbine mag well (not CMMG's fault, obviously one size never fits all). I recently bought some Black Dog Machine 25 rd mags on sale, which fit the mag well without wobbling. Guess what? The 60 gr ammo functions reliably using the Black Dog mags, despite the less-than-energetic ejection. Guess I will have to buy more of the Aguila 60 gr SSS ammo when I see it - filthy-dirty stuff, but it's worth shooting with the Black Dog mags!
EDIT: Maybe this is an example of somebody (me) who blamed the ammo (Aguila 60 gr) for problems that were really caused by something else (mags/mag well)!
As always IMHO, FWIW, YMMV, etc.