I'll relate my PT145 mag experiences here since this thread seems to be the most recent.
I bought my PT145 about a year ago. It was manufactured 12/08. Came with two factory mags of the (B) type shown in the following thread:
First time out on the range I had the FTF issues with both mags. After that was when I started reading up on the problem and possible solutions discussed on this site. Didn't do anything. Just put the pistol away in disgust.
A while later I was able to pick up 4 24/7 12rd factory mags cheap (after confirming on this site that they worked in the PT145). There is a thread here describing the differences in the generations of 24/7 mags:
Turns out I have one of the 1st generation and 3 of the second generation. The follower of the 1st generation 24/7 mag closely resembles the follower of the (B) PT145 mag.
My next time out on the range I started keeping notes about which mags were doing what and what ammo I was using. I used Wolf steelcase and American Eagle. All 6 mags had FTFs.
I still didn't start tearing down the mags because I wanted more range time.
Next time out I used Blazer Brass in all the mags. Got FTFs in all the mags.
Today I went to the range and used Blazer Aluminum. In the 2 PT145 mags I first shot 6 rds, then 8, then 10. No FTFs at all. In the 4 24/7 mags I first shot 6 rds, then 9 rds. No FTFs at all. By then I was running low and was only able to shoot a full 12 rds from just one of the 24/7 mags (the first generation) and had no FTFs.
I will go back to the range in the near future with more Blazer Aluminum and other brands, do some more testing and report back.
Meantime, if you are still having FTFs with brass cased ammo, try Blazer Aluminum and see if you get better results.