I had a 10/22 that had the same problems as yours. The first option is to try a different magazine, if that don't work here are two parts that I put on mine that fixed my problem completely.

http://www.midwayusa.com/eproductpage.exe/showproduct?saleitemid=546577

http://www.midwayusa.com/eproductpage.exe/showproduct?saleitemid=531196