I have never used the 32 round promag's but I have used their 9-22 mags. They are not very reliable and require a lot of tinkering to get them to work properly (unless you get lucky and have one of those rare mags with no issues). If I had to choose a reliable mag I would go with BC steel lips. They are pretty cheap and very reliable. While they don't look as pretty at the promags with the shell, they will give you far fewer headaches.