Anybody know which aftermarket high capacity is the best/most reliable for a ruger 10/22 ?

Avaoid ALL with the plastic feed lips. Best ones going cost a bit more but hey, you get what you pay for...they're the ones but Tactcial Innovations.

For the money, the Bulter Creek 25 round clips (with the plastic lips) I have are so-so. The first couple of rounds don't quite feed right most of the time, but after that the remaining loads all cycle through decently. Avoid the plastic high capactiy clips Cabelas sells. I bought a 50 round clip from them last year, and it was a piece of junk. It never fed the rounds properly so I ended up sending it backing and getting another factory clip instead.

+1. Regards, Rick.