Hey critter, first off have you received your Mec-Gar mags yet? Second how are they working? I ask this in that I have a BT380 (7) round. I purchased a couple 8 rd Mec-Gar mags in order to have the 1 extra round for a total of nine rounds in the gun. (8 in the mag & 1 up top). The problem that I have is that if there is 1 round up top and the slide is forward, I cannot load a full 8 round mag in the gun. The mag will not go all the way up into the mag well. If I load 7 in the mag and theres 1 up top and the slide forward, theres no problem. This to me defeats the whole purpose which is why I'm asking you about your experience.