Went out for my weekly range trip to shoot the Solo after doing a thorough inspection/cleaning and some tweeking on the mag release mechanism this weekend. Also brought my UC2 and Smith & Wesson M&P 22 pistols for some exercise.
Started with the Solo. Over the weekend I placed a .005" shim on one of the other magazines so I now have one unshimmed, one with a .01" shim and one with .005". I had stuffed all three with six rounds and stuffing is an appropriate term as getting that last round in takes some effort. Using the Nato 124gr ammo, first up was the unshimmed magazine. Cycled slide and the round did not chamber fully. Bumped the slide with my hand and it finished chambering. Fired the first shot and got a Failure to Extract and slide stuck partially open. Cleared it, removed that magazine and put the .005" shimmed mag in. Cycled, fired and same thing a FTE with slide stuck partially open. Cleared that, removed the mag and put (ole faithful) the .01" shimmed mag, cycled, fired and all good.... shot the remaining rounds in the mag without a hiccup. Then I grabbed the .005" mag (with only 5 rounds still in it), cycled, fired 5 rounds with no issues. Grabbed the unshimmed mag (also 5 rounds left in it), cycled and fired 4 rounds with no issues then the mag prematurely released on last round.
Reloaded all three mag with 6 rounds and the gun performed flawlessly with the two shimmed mags AS WELL AS the unshimmed mag this time
Reloaded all three and all good till the third round on the unshimmed mag, when the magazine prematurely released. Continued on through a total of 80 rounds and the two shimmed mags performed without issue. With the unshimmed mag, I'd get a premature mag release occasionally, but not consistently like I was in previous round trips (with the unshimmed mags). I painstakenly made sure I was not holding the pistol in a way that I was bumping the mag release upon firing and it does not appear that is the case. If I was, it seems that I would get an occasional release with one of the other magazines
The .001" shimmed mag has the most rounds cycled through it so I'm thinking I just need to keep shooting with the other two as well. They are both harder to get that last round in than the .001" mag, and one is brand new (less than 10 rounds before today).
Shot three mags with the UC2 and it chugged right through them with no issue. Truly a joy to shoot. Then grabbed the M&P and that was like shooting a BB Gun after all the 9MM & 45 rounds I'd just shot.
As far as my (new to me) used Solo, I'm gonna keep on shootin.
It definitely seems to be getting better with each range trip