Texrep I’m using the same mag that came with the rifle. My rifle uses the Glock mags. I do have Glock magazines. I’ve used them with the same results.
It is random in that it may shoot to the same point of aim or shoot a pattern. Lets say the first mag shoots a four inch group (10 shots) the next mag will shoot the first shot high right then the next shot low right then put one in the center of the target then the next shot low left. Gets frustrating but I’m going to figure it out. As I said I do not expect pinpoint accuracy but a consistent four to five inch group is what I’m looking for.