They are new Pro Mag Blue steel 20 rds. Never had this problem but I never only loaded 3 & 6 rds at a time. The more I look at it I do think it is the mags. I will try my Colt, Cooper, USGI, and Orlite after a good cleaning. The bolt catch is working fine as i checked it after the previous post. Spring is strong and clean. Every few years I have it gone over by N Virginia Gun works and its due in again. Anything else you can recommend I have them look for will be appreciated. Lastly, my mags run the mill from junk to new. I do not like any of them and plan on getting the HK SA80 next month. After all this is my first baby. Thank again.
PS. I did read all the FAQs prior to posting and most FTF problems seem to be Mags. This the first time I had this problem in 14 years with this Colt.