I have had the same experience. TI has both nylon & aluminum mags. Both function perfectly.They're of hit and miss quality.
The best hi-cap 10-22 mag has got to be the Tactical Innovations magazines. They run about 10 bucks more....but they're oh-so worth it. Besides, you can take them apart for cleaning and buy parts if they crap out. With the BCs...forget it.
I had very hit and miss experiences with the Butler Creek hot lips mags. They work great for a short while, but wear out really fast. I bought two Tactical Inc. mags and have not had a lick of trouble.
We shoot the 10-22 quite a bit. My daughter usually puts a brick through the thing every other weekend! So far...8 months of heavy shooting has not phased the Tactical Innovations mags.