Went out for my weekly lunchtime range trip today. I'd went out and found some Nato 124 gr ammo (recommended by Marshall). Could not find any Tulammo, so went with the Nato.
After getting home Sunday, I took the Solo down for a cleaning & inspection. Also took the mags down for a cleaning. With the slide removed, I inserted one of the mags (with all the guts removed) to check the latch for the magazine. First thing that was noticeable was the amount of movement of the mag body when inserted. Latch was fully engaging, but if you moved the mag rearward you could not see the ends of the two latches. Decided to do a little experiment and found some shim material (plastic) .01". Using epoxy I glued the shim material to the back, flat edge of the magazine. Once dried I trimed/sanded the edges. Loaded up both mags to let sit till I made it to the range again.
Got to range today and began with the shimmed magazine. Shot through two magazines of the Nato with no issues at all. Switched to the unshimmed mag and on second round had a failure to eject. Cleared and shot two more rounds, then magazine released. Latched back and finished the mag. Loaded up the shimmed magazine and shot through it twice.... no failures. Went back to the unshimmed and experienced the same failures as before. Put that mag up and finished up the 9mm ammo I had with the shimmed magazine and did not have one single issue on that magazine.
One other thing I noticed was previously the slide would latch on last round (but just barely). When I would drop the mag, the slide would snap back closed as if I'd released it. As I got through the 100 rounds, the slide started to latch on last round and would remain latched open while I reloaded.
So, for all you long time Solo owners, is this just a magazine quality issue, or does the mag release need to be replaced ?
I plan to keep shooting and comparing performance of both mags for a few more trips.