1st of all CONGRATS!!
Seems like all of my new extended mags want to FTE or FTF until they are broken in.....at least loaded and shot several times.... I use the Butler Creek too, but with the steel lips, after hearing about wear issues with the plastic lips .... my 10-22 also has the polymer trigger group, but has worked great for about 3000 rounds now....still very crisp, clean, accurate trigger....