I think mine are the double feed? They are pretty wide and the bullets snap in just fine until about 2/3 full and then they load pretty hard! Is there a loader that works with them? I do plan on shooting it for a while and then sending it to Sam. My FFL will let me shoot it at their range and it is still my new toy!!!
Thanks, JD
The original Walther M10/9 mags are easy to load by hand until full.
The RPB M10/9 mags sold by FTF and others load to about 20 rounds then become difficult without a loader.
My fix was I took a long wide file and gently smoothed the insides of the mags, removing what appears to be parkerizing over spray, and polished the insides as best as I could. This was not a quick process. I also took a fine file and fine grit sandpaper and polished the follower in the direction of its travel when its inside the mag.
I cleaned the inside of the mag very well and found it loaded almost full with less effort than before. It still wasn't easy loading, but it is manageable and do-able.
Maybe that will help you too. Just take your time and work gently.
Its worth the effort.