Apologies for another newbie question. I have been really struggling to load the last round into the 10-round magazines of my new Walther P99C. If I try to do it slowly and carefully, it seems next to impossible to get the round in. But if I do it with a really hard, fast action, it does go in. Two magazines came with the pistol and I bought a third, and they are all equally hard work when it comes to inserting the last round. Anyone else experience this? Is it normal that one should have to work so hard to press in the last round? Is any harm going to come to the magazine spring by compressing it so forcefully?