Hi Scott. My name is Scott too! I just got my .22 cal 350 mag back from Umerex after they fixed a broken mainspring and spring guide. Before I knew any better I had shot about 300 to 400 Ein Jun heavy pellets through it. The FPE dropped from to 18 rather quickly as I damaged the rifle over a couple of days. Fortunately Umerex did all the repairs under warranty no questions asked- and I didn’t even register for the warranty service. I’m sure . will tell you why ultra heavy pellets in springers is a no-no. I would if I could, but I’m no expert.
Just got my .25 cal Patriot today! WooHoo!!