First time to the range with a new XDM-9. Shoots great. No feed issues (100+ rounds). One question. The spring tension in the magazine seems very stiff. The magazine took 15 rounds with no problem but was extremely difficult to put in remaining 4 rounds. I had to unload several rounds, tap, and reload several times until all 19 fit properly. I was using the XDm Gear mag loader. Both factory magazines that came with the XDM have similar spring tension, I have other high capacity magazines (XD40) and don't remember new mags being so tight. Any others seeing the same issue? Any secret to loading the XDM-9 high capacity magazines?