When my old Mec-Gar plastic follower mags started going bad, after 30 years or so, I tested Wilson's and Chip McCormicks. If you are a very serious competitor, the Wilsons allow you to clean your mags quickly and efficiently between stages. There is a brush from Wal-Mart intended to clean under refrigerators which is excellent. The McCs are not easily cleaned, but have fewer points of failure. I bought the McCormicks. I keep the Wilson I tested too!
Who wishes he was a rich man...hummm gotta go up to GA, Mega Millions is 304 Million...I'd love to contribute large quantities of money to the GNP.