This forum has always been a great help with any issues or advice I sought help with in the past and I appreciate that.
I have a new (previously fired about 48 rounds through it since purchase). 12-round Sig P-365 9mm magazine.
Last time out to the range I fired another 12 from this magazine and when I went to reload it and even after 4-5 tries, it would only load 3 rounds then act like it was fully loaded. I kept trying but still would not accept more than 3 rounds. Any advice? What do you think gunsmiths? Spring problem, follower problem???

Thanks.