Three Shadow 2's, and my notes from using them all season. First two guns, the Urban Grey and Black (red grips) arrived in November of 2017 and the third (blue grips) arrived in February 2018. Previously I was shooting SP-01 Shadows and an Accu-Shadow. Biggest reason for the change was the new frame, this gun fits me very well especially with the Scale grips.
Load used all season was mixed range brass, CCI or Winchester primers, 1.115" OAL, 3.8 grains of Titegroup and a 125gr RN Blue Bullet.
When new the triggers were decent, but the Urban Grey had some creep in SA. So I installed a Cajun Gun Works kit in it, and liked it so I did the same to the other 2 guns. This was the older kit with the T1 not T5 disconnector. All installs went easy, and I polished everything while doing the install. I used the 11.5lb mainspring and an 11lb recoil with the buffer. DA's are all just around 5.5lbs, and the SA is just under 3lbs and crisp. Weights were perfectly fine for me and the disconnector didn't need fitting and good enough for me. Dawson .090" front fiber, but I might switch them to .100" for this next season. I also pulled the Shadowline triggers out, and put in the "new" style 85C triggers.
Urban grey is my main dry-fire/practice gun. I don't track round count in each gun, but I shot just under 40k this year, and this gun got the brunt of it. I would say probably 20-25k as I used the red gripped gun for a couple weeks in practice. Countless dry-fire, trigger presses, reloads, table pickups, etc. Cleaned about 4 times this year, just hosed it out with brake cleaner and a bore snake through the bore. I would pull the extractor and clean that area as well.
One broken trigger return spring early in the season, it was the reduced power Cajun part and it was replaced with the factory "red" spring which is still running strong. The other two guns just kept the factory TRS. No other parts broken.
7 malfunctions which were all ammo related as I don't inspect my practice ammo, just load it up and shoot it. Each was a failure to go into battery, reducing my OAL to 1.09" should solve it as I was just too close to the rifling. I also had my first squib, and it was my fault, just knocked the bullet out of the barrel and went back to training. Nothing else was replaced, same recoil spring, same hammer spring and same buffer all season.
Practice/match back up gun. About 7k to 10k through it, some dry-fire, but somewhat limited compared to the UG gun. No malfunctions, no broken parts. Cleaned only before a major match, again knock out the chunks and blast it with brake cleaner and clean the extractor. No malfunctions.
Match gun. Approximately 5k 7k on it, generally only used for matches after I shot 2k through it when new. This gun got wiped out before each major as a half assed cleaning and re-lubed. 2 malfunctions, first at Wisconsin Sectional with a failure to go into battery. Reducing OAL will fixed it. The other was at Nationals on stage 5, grabbed the mag off the barrel and somehow angled it just right that the round started to come out of the magazine and when I loaded it in the gun it popped out and flipped over, entirely my fault.
Now that my off-season is here, they will all get fresh springs, stripped, cleaned and inspected. The backup and match gun will get new slide stops and the used ones will be used with the practice gun until the break or get mangled. As you can see the guns needed very little maintenance throughout the season.
Really can't go wrong with the Shadow 2 in my opinion!